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1 | \input texinfo.tex @c -*-texinfo-*- |
2 | @c @ifnothtml | |
3 | @c %**start of header | |
d7f8491b | 4 | @setfilename gccinstall.info |
f42974dc DW |
5 | @settitle Installing GCC |
6 | @setchapternewpage odd | |
7 | @c %**end of header | |
8 | @c @end ifnothtml | |
9 | ||
7771bb62 BM |
10 | @include gcc-common.texi |
11 | ||
f42974dc DW |
12 | @c Specify title for specific html page |
13 | @ifset indexhtml | |
14 | @settitle Installing GCC | |
15 | @end ifset | |
16 | @ifset specifichtml | |
17 | @settitle Host/Target specific installation notes for GCC | |
18 | @end ifset | |
67b1fbb9 KG |
19 | @ifset prerequisiteshtml |
20 | @settitle Prerequisites for GCC | |
21 | @end ifset | |
f42974dc DW |
22 | @ifset downloadhtml |
23 | @settitle Downloading GCC | |
24 | @end ifset | |
25 | @ifset configurehtml | |
26 | @settitle Installing GCC: Configuration | |
27 | @end ifset | |
28 | @ifset buildhtml | |
29 | @settitle Installing GCC: Building | |
30 | @end ifset | |
31 | @ifset testhtml | |
32 | @settitle Installing GCC: Testing | |
33 | @end ifset | |
34 | @ifset finalinstallhtml | |
35 | @settitle Installing GCC: Final installation | |
36 | @end ifset | |
37 | @ifset binarieshtml | |
38 | @settitle Installing GCC: Binaries | |
39 | @end ifset | |
73e2155a JM |
40 | @ifset oldhtml |
41 | @settitle Installing GCC: Old documentation | |
42 | @end ifset | |
aed5964b JM |
43 | @ifset gfdlhtml |
44 | @settitle Installing GCC: GNU Free Documentation License | |
45 | @end ifset | |
f42974dc | 46 | |
c1a9c369 | 47 | @c Copyright (C) 1988-2017 Free Software Foundation, Inc. |
f42974dc DW |
48 | @c *** Converted to texinfo by Dean Wakerley, dean@wakerley.com |
49 | ||
d7f755c3 PB |
50 | @c IMPORTANT: whenever you modify this file, run `install.texi2html' to |
51 | @c test the generation of HTML documents for the gcc.gnu.org web pages. | |
52 | @c | |
53 | @c Do not use @footnote{} in this file as it breaks install.texi2html! | |
54 | ||
f42974dc DW |
55 | @c Include everything if we're not making html |
56 | @ifnothtml | |
57 | @set indexhtml | |
58 | @set specifichtml | |
67b1fbb9 | 59 | @set prerequisiteshtml |
f42974dc DW |
60 | @set downloadhtml |
61 | @set configurehtml | |
62 | @set buildhtml | |
63 | @set testhtml | |
64 | @set finalinstallhtml | |
65 | @set binarieshtml | |
73e2155a | 66 | @set oldhtml |
aed5964b | 67 | @set gfdlhtml |
f42974dc DW |
68 | @end ifnothtml |
69 | ||
70 | @c Part 2 Summary Description and Copyright | |
bdefb2ab | 71 | @copying |
c1a9c369 | 72 | Copyright @copyright{} 1988-2017 Free Software Foundation, Inc. |
aed5964b JM |
73 | @sp 1 |
74 | Permission is granted to copy, distribute and/or modify this document | |
07a67d6a | 75 | under the terms of the GNU Free Documentation License, Version 1.3 or |
aed5964b JM |
76 | any later version published by the Free Software Foundation; with no |
77 | Invariant Sections, the Front-Cover texts being (a) (see below), and | |
78 | with the Back-Cover Texts being (b) (see below). A copy of the | |
79 | license is included in the section entitled ``@uref{./gfdl.html,,GNU | |
80 | Free Documentation License}''. | |
81 | ||
82 | (a) The FSF's Front-Cover Text is: | |
83 | ||
84 | A GNU Manual | |
85 | ||
86 | (b) The FSF's Back-Cover Text is: | |
87 | ||
88 | You have freedom to copy and modify this GNU Manual, like GNU | |
89 | software. Copies published by the Free Software Foundation raise | |
90 | funds for GNU development. | |
bdefb2ab | 91 | @end copying |
f42974dc | 92 | @ifinfo |
bdefb2ab | 93 | @insertcopying |
f42974dc | 94 | @end ifinfo |
c3cb54c6 | 95 | @dircategory Software development |
802f6d4b JM |
96 | @direntry |
97 | * gccinstall: (gccinstall). Installing the GNU Compiler Collection. | |
98 | @end direntry | |
f42974dc DW |
99 | |
100 | @c Part 3 Titlepage and Copyright | |
101 | @titlepage | |
7771bb62 BM |
102 | @title Installing GCC |
103 | @versionsubtitle | |
f42974dc DW |
104 | |
105 | @c The following two commands start the copyright page. | |
106 | @page | |
ef88b07d | 107 | @vskip 0pt plus 1filll |
bdefb2ab | 108 | @insertcopying |
f42974dc DW |
109 | @end titlepage |
110 | ||
7771bb62 | 111 | @c Part 4 Top node, Master Menu, and/or Table of Contents |
f42974dc DW |
112 | @ifinfo |
113 | @node Top, , , (dir) | |
114 | @comment node-name, next, Previous, up | |
115 | ||
116 | @menu | |
117 | * Installing GCC:: This document describes the generic installation | |
118 | procedure for GCC as well as detailing some target | |
f9047ed3 | 119 | specific installation instructions. |
f42974dc DW |
120 | |
121 | * Specific:: Host/target specific installation notes for GCC. | |
122 | * Binaries:: Where to get pre-compiled binaries. | |
123 | ||
73e2155a JM |
124 | * Old:: Old installation documentation. |
125 | ||
aed5964b | 126 | * GNU Free Documentation License:: How you can copy and share this manual. |
f42974dc DW |
127 | * Concept Index:: This index has two entries. |
128 | @end menu | |
129 | @end ifinfo | |
130 | ||
7771bb62 BM |
131 | @iftex |
132 | @contents | |
133 | @end iftex | |
134 | ||
f42974dc DW |
135 | @c Part 5 The Body of the Document |
136 | @c ***Installing GCC********************************************************** | |
6cfb3f16 | 137 | @ifnothtml |
f42974dc DW |
138 | @comment node-name, next, previous, up |
139 | @node Installing GCC, Binaries, , Top | |
6cfb3f16 | 140 | @end ifnothtml |
f42974dc | 141 | @ifset indexhtml |
f42974dc DW |
142 | @ifnothtml |
143 | @chapter Installing GCC | |
144 | @end ifnothtml | |
145 | ||
146 | The latest version of this document is always available at | |
f9047ed3 | 147 | @uref{http://gcc.gnu.org/install/,,http://gcc.gnu.org/install/}. |
1b667f1b JW |
148 | It refers to the current development sources, instructions for |
149 | specific released versions are included with the sources. | |
f42974dc DW |
150 | |
151 | This document describes the generic installation procedure for GCC as well | |
f9047ed3 | 152 | as detailing some target specific installation instructions. |
f42974dc | 153 | |
f9047ed3 JM |
154 | GCC includes several components that previously were separate distributions |
155 | with their own installation instructions. This document supersedes all | |
1b667f1b | 156 | package-specific installation instructions. |
f42974dc | 157 | |
f9047ed3 | 158 | @emph{Before} starting the build/install procedure please check the |
f42974dc | 159 | @ifnothtml |
eea81d3e | 160 | @ref{Specific, host/target specific installation notes}. |
f42974dc | 161 | @end ifnothtml |
c009f01f | 162 | @ifhtml |
f9047ed3 | 163 | @uref{specific.html,,host/target specific installation notes}. |
c009f01f | 164 | @end ifhtml |
f9047ed3 | 165 | We recommend you browse the entire generic installation instructions before |
f42974dc DW |
166 | you proceed. |
167 | ||
c009f01f | 168 | Lists of successful builds for released versions of GCC are |
daf2f129 | 169 | available at @uref{http://gcc.gnu.org/buildstat.html}. |
c009f01f JJ |
170 | These lists are updated as new information becomes available. |
171 | ||
f9047ed3 | 172 | The installation procedure itself is broken into five steps. |
f42974dc DW |
173 | |
174 | @ifinfo | |
175 | @menu | |
67b1fbb9 | 176 | * Prerequisites:: |
f42974dc DW |
177 | * Downloading the source:: |
178 | * Configuration:: | |
179 | * Building:: | |
180 | * Testing:: (optional) | |
181 | * Final install:: | |
182 | @end menu | |
183 | @end ifinfo | |
c009f01f | 184 | @ifhtml |
f42974dc | 185 | @enumerate |
f9047ed3 | 186 | @item |
67b1fbb9 KG |
187 | @uref{prerequisites.html,,Prerequisites} |
188 | @item | |
f42974dc | 189 | @uref{download.html,,Downloading the source} |
f42974dc | 190 | @item |
f9047ed3 JM |
191 | @uref{configure.html,,Configuration} |
192 | @item | |
193 | @uref{build.html,,Building} | |
194 | @item | |
195 | @uref{test.html,,Testing} (optional) | |
f42974dc DW |
196 | @item |
197 | @uref{finalinstall.html,,Final install} | |
198 | @end enumerate | |
c009f01f | 199 | @end ifhtml |
f42974dc | 200 | |
38209993 | 201 | Please note that GCC does not support @samp{make uninstall} and probably |
f9047ed3 | 202 | won't do so in the near future as this would open a can of worms. Instead, |
f42974dc | 203 | we suggest that you install GCC into a directory of its own and simply |
38209993 | 204 | remove that directory when you do not need that specific version of GCC |
eea81d3e RO |
205 | any longer, and, if shared libraries are installed there as well, no |
206 | more binaries exist that use them. | |
f42974dc | 207 | |
73e2155a JM |
208 | @ifhtml |
209 | There are also some @uref{old.html,,old installation instructions}, | |
210 | which are mostly obsolete but still contain some information which has | |
211 | not yet been merged into the main part of this manual. | |
212 | @end ifhtml | |
213 | ||
f42974dc | 214 | @html |
b8db17af | 215 | <hr /> |
f42974dc DW |
216 | <p> |
217 | @end html | |
218 | @ifhtml | |
219 | @uref{./index.html,,Return to the GCC Installation page} | |
aed5964b | 220 | |
bdefb2ab | 221 | @insertcopying |
f42974dc DW |
222 | @end ifhtml |
223 | @end ifset | |
224 | ||
67b1fbb9 KG |
225 | @c ***Prerequisites************************************************** |
226 | @ifnothtml | |
227 | @comment node-name, next, previous, up | |
228 | @node Prerequisites, Downloading the source, , Installing GCC | |
229 | @end ifnothtml | |
230 | @ifset prerequisiteshtml | |
231 | @ifnothtml | |
232 | @chapter Prerequisites | |
233 | @end ifnothtml | |
234 | @cindex Prerequisites | |
235 | ||
236 | GCC requires that various tools and packages be available for use in the | |
237 | build procedure. Modifying GCC sources requires additional tools | |
238 | described below. | |
239 | ||
240 | @heading Tools/packages necessary for building GCC | |
241 | @table @asis | |
477a24c1 | 242 | @item ISO C++98 compiler |
80521187 | 243 | Necessary to bootstrap GCC, although versions of GCC prior |
477a24c1 RB |
244 | to 4.8 also allow bootstrapping with a ISO C89 compiler and versions |
245 | of GCC prior to 3.4 also allow bootstrapping with a traditional | |
246 | (K&R) C compiler. | |
67b1fbb9 | 247 | |
80521187 | 248 | To build all languages in a cross-compiler or other configuration where |
67b1fbb9 | 249 | 3-stage bootstrap is not performed, you need to start with an existing |
477a24c1 | 250 | GCC binary (version 3.4 or later) because source code for language |
67b1fbb9 KG |
251 | frontends other than C might use GCC extensions. |
252 | ||
2b4212d5 AH |
253 | Note that to bootstrap GCC with versions of GCC earlier than 3.4, you |
254 | may need to use @option{--disable-stage1-checking}, though | |
255 | bootstrapping the compiler with such earlier compilers is strongly | |
256 | discouraged. | |
257 | ||
afe0e941 FXC |
258 | @item C standard library and headers |
259 | ||
260 | In order to build GCC, the C standard library and headers must be present | |
261 | for all target variants for which target libraries will be built (and not | |
262 | only the variant of the host C++ compiler). | |
263 | ||
264 | This affects the popular @samp{x86_64-unknown-linux-gnu} platform (among | |
265 | other multilib targets), for which 64-bit (@samp{x86_64}) and 32-bit | |
266 | (@samp{i386}) libc headers are usually packaged separately. If you do a | |
267 | build of a native compiler on @samp{x86_64-unknown-linux-gnu}, make sure you | |
268 | either have the 32-bit libc developer package properly installed (the exact | |
269 | name of the package depends on your distro) or you must build GCC as a | |
270 | 64-bit only compiler by configuring with the option | |
271 | @option{--disable-multilib}. Otherwise, you may encounter an error such as | |
272 | @samp{fatal error: gnu/stubs-32.h: No such file} | |
273 | ||
67b1fbb9 KG |
274 | @item GNAT |
275 | ||
276 | In order to build the Ada compiler (GNAT) you must already have GNAT | |
277 | installed because portions of the Ada frontend are written in Ada (with | |
278 | GNAT extensions.) Refer to the Ada installation instructions for more | |
279 | specific information. | |
280 | ||
281 | @item A ``working'' POSIX compatible shell, or GNU bash | |
282 | ||
283 | Necessary when running @command{configure} because some | |
284 | @command{/bin/sh} shells have bugs and may crash when configuring the | |
80521187 GP |
285 | target libraries. In other cases, @command{/bin/sh} or @command{ksh} |
286 | have disastrous corner-case performance problems. This | |
67b1fbb9 KG |
287 | can cause target @command{configure} runs to literally take days to |
288 | complete in some cases. | |
289 | ||
290 | So on some platforms @command{/bin/ksh} is sufficient, on others it | |
291 | isn't. See the host/target specific instructions for your platform, or | |
292 | use @command{bash} to be sure. Then set @env{CONFIG_SHELL} in your | |
293 | environment to your ``good'' shell prior to running | |
294 | @command{configure}/@command{make}. | |
295 | ||
daf2f129 | 296 | @command{zsh} is not a fully compliant POSIX shell and will not |
8a36672b | 297 | work when configuring GCC@. |
1b49d06f | 298 | |
3f737aa9 RW |
299 | @item A POSIX or SVR4 awk |
300 | ||
301 | Necessary for creating some of the generated source files for GCC@. | |
302 | If in doubt, use a recent GNU awk version, as some of the older ones | |
303 | are broken. GNU awk version 3.1.5 is known to work. | |
304 | ||
67b1fbb9 KG |
305 | @item GNU binutils |
306 | ||
307 | Necessary in some circumstances, optional in others. See the | |
308 | host/target specific instructions for your platform for the exact | |
309 | requirements. | |
310 | ||
311 | @item gzip version 1.2.4 (or later) or | |
312 | @itemx bzip2 version 1.0.2 (or later) | |
313 | ||
314 | Necessary to uncompress GCC @command{tar} files when source code is | |
315 | obtained via FTP mirror sites. | |
316 | ||
6cba282a | 317 | @item GNU make version 3.80 (or later) |
e158a5fb | 318 | |
8a36672b | 319 | You must have GNU make installed to build GCC@. |
e158a5fb | 320 | |
f44a5ab6 | 321 | @item GNU tar version 1.14 (or later) |
67b1fbb9 KG |
322 | |
323 | Necessary (only on some platforms) to untar the source code. Many | |
324 | systems' @command{tar} programs will also work, only try GNU | |
325 | @command{tar} if you have problems. | |
326 | ||
727bd12e | 327 | @item Perl version between 5.6.1 and 5.6.24 |
eb975109 | 328 | |
073a8998 | 329 | Necessary when targeting Darwin, building @samp{libstdc++}, |
eb975109 | 330 | and not using @option{--disable-symvers}. |
073a8998 | 331 | Necessary when targeting Solaris 2 with Sun @command{ld} and not using |
084239f4 RO |
332 | @option{--disable-symvers}. The bundled @command{perl} in Solaris@tie{}8 |
333 | and up works. | |
eb975109 RO |
334 | |
335 | Necessary when regenerating @file{Makefile} dependencies in libiberty. | |
336 | Necessary when regenerating @file{libiberty/functions.texi}. | |
337 | Necessary when generating manpages from Texinfo manuals. | |
338 | Used by various scripts to generate some files included in SVN (mainly | |
339 | Unicode-related and rarely changing) from source tables. | |
340 | ||
727bd12e TK |
341 | Used by @command{automake}. |
342 | ||
64cadbe7 RO |
343 | @end table |
344 | ||
345 | Several support libraries are necessary to build GCC, some are required, | |
346 | others optional. While any sufficiently new version of required tools | |
347 | usually work, library requirements are generally stricter. Newer | |
348 | versions may work in some cases, but it's safer to use the exact | |
349 | versions documented. We appreciate bug reports about problems with | |
7a07ae52 JW |
350 | newer versions, though. If your OS vendor provides packages for the |
351 | support libraries then using those packages may be the simplest way to | |
352 | install the libraries. | |
64cadbe7 RO |
353 | |
354 | @table @asis | |
362c6d2f | 355 | @item GNU Multiple Precision Library (GMP) version 4.3.2 (or later) |
bda4d063 | 356 | |
7a07ae52 JW |
357 | Necessary to build GCC@. If a GMP source distribution is found in a |
358 | subdirectory of your GCC sources named @file{gmp}, it will be built | |
359 | together with GCC. Alternatively, if GMP is already installed but it | |
360 | is not in your library search path, you will have to configure with the | |
c02c7cb1 | 361 | @option{--with-gmp} configure option. See also @option{--with-gmp-lib} |
7a07ae52 | 362 | and @option{--with-gmp-include}. |
00f35794 BE |
363 | The in-tree build is only supported with the GMP version that |
364 | download_prerequisites installs. | |
bda4d063 | 365 | |
362c6d2f | 366 | @item MPFR Library version 2.4.2 (or later) |
bebf829d | 367 | |
0ee2ea09 | 368 | Necessary to build GCC@. It can be downloaded from |
7a07ae52 JW |
369 | @uref{http://www.mpfr.org/}. If an MPFR source distribution is found |
370 | in a subdirectory of your GCC sources named @file{mpfr}, it will be | |
371 | built together with GCC. Alternatively, if MPFR is already installed | |
372 | but it is not in your default library search path, the | |
373 | @option{--with-mpfr} configure option should be used. See also | |
374 | @option{--with-mpfr-lib} and @option{--with-mpfr-include}. | |
00f35794 BE |
375 | The in-tree build is only supported with the MPFR version that |
376 | download_prerequisites installs. | |
641afcff | 377 | |
362c6d2f | 378 | @item MPC Library version 0.8.1 (or later) |
3a5729ea KG |
379 | |
380 | Necessary to build GCC@. It can be downloaded from | |
7a07ae52 JW |
381 | @uref{http://www.multiprecision.org/}. If an MPC source distribution |
382 | is found in a subdirectory of your GCC sources named @file{mpc}, it | |
383 | will be built together with GCC. Alternatively, if MPC is already | |
384 | installed but it is not in your default library search path, the | |
385 | @option{--with-mpc} configure option should be used. See also | |
386 | @option{--with-mpc-lib} and @option{--with-mpc-include}. | |
00f35794 BE |
387 | The in-tree build is only supported with the MPC version that |
388 | download_prerequisites installs. | |
3a5729ea | 389 | |
f877b3ad | 390 | @item isl Library version 0.15 or later. |
3aea2d1c SP |
391 | |
392 | Necessary to build GCC with the Graphite loop optimizations. | |
f50d98b5 | 393 | It can be downloaded from @uref{ftp://gcc.gnu.org/pub/gcc/infrastructure/}. |
e357a5e0 | 394 | If an isl source distribution is found |
43372236 RB |
395 | in a subdirectory of your GCC sources named @file{isl}, it will be |
396 | built together with GCC. Alternatively, the @option{--with-isl} configure | |
e357a5e0 | 397 | option should be used if isl is not installed in your default library |
43372236 | 398 | search path. |
3aea2d1c | 399 | |
f9bab007 | 400 | @end table |
67b1fbb9 KG |
401 | |
402 | @heading Tools/packages necessary for modifying GCC | |
403 | @table @asis | |
70fa0efa RW |
404 | @item autoconf version 2.64 |
405 | @itemx GNU m4 version 1.4.6 (or later) | |
67b1fbb9 | 406 | |
89acbae0 | 407 | Necessary when modifying @file{configure.ac}, @file{aclocal.m4}, etc.@: |
565f8ce5 | 408 | to regenerate @file{configure} and @file{config.in} files. |
67b1fbb9 | 409 | |
29910c86 | 410 | @item automake version 1.11.6 |
67b1fbb9 KG |
411 | |
412 | Necessary when modifying a @file{Makefile.am} file to regenerate its | |
ce5c1cf3 KC |
413 | associated @file{Makefile.in}. |
414 | ||
415 | Much of GCC does not use automake, so directly edit the @file{Makefile.in} | |
416 | file. Specifically this applies to the @file{gcc}, @file{intl}, | |
078e3ffe PB |
417 | @file{libcpp}, @file{libiberty}, @file{libobjc} directories as well |
418 | as any of their subdirectories. | |
ce5c1cf3 | 419 | |
ae8cacc6 | 420 | For directories that use automake, GCC requires the latest release in |
29910c86 | 421 | the 1.11 series, which is currently 1.11.6. When regenerating a directory |
70fa0efa | 422 | to a newer version, please update all the directories using an older 1.11 |
ae8cacc6 | 423 | to the latest released version. |
ccfca4ae | 424 | |
727bd12e TK |
425 | Note that @command{automake} 1.11.6 is incompatible with |
426 | @command{perl} version 5.6.26. | |
427 | ||
4b794eaf | 428 | @item gettext version 0.14.5 (or later) |
4f3ce03f JM |
429 | |
430 | Needed to regenerate @file{gcc.pot}. | |
67b1fbb9 KG |
431 | |
432 | @item gperf version 2.7.2 (or later) | |
433 | ||
434 | Necessary when modifying @command{gperf} input files, e.g.@: | |
435 | @file{gcc/cp/cfns.gperf} to regenerate its associated header file, e.g.@: | |
436 | @file{gcc/cp/cfns.h}. | |
437 | ||
80521187 GP |
438 | @item DejaGnu 1.4.4 |
439 | @itemx Expect | |
440 | @itemx Tcl | |
67b1fbb9 | 441 | |
f07f30cf MS |
442 | Necessary to run the GCC testsuite; see the section on testing for |
443 | details. Tcl 8.6 has a known regression in RE pattern handling that | |
444 | make parts of the testsuite fail. See | |
445 | @uref{http://core.tcl.tk/tcl/tktview/267b7e2334ee2e9de34c4b00d6e72e2f1997085f} | |
f15b287f | 446 | for more information. This bug has been fixed in 8.6.1. |
67b1fbb9 KG |
447 | |
448 | @item autogen version 5.5.4 (or later) and | |
449 | @itemx guile version 1.4.1 (or later) | |
450 | ||
451 | Necessary to regenerate @file{fixinc/fixincl.x} from | |
452 | @file{fixinc/inclhack.def} and @file{fixinc/*.tpl}. | |
453 | ||
80521187 | 454 | Necessary to run @samp{make check} for @file{fixinc}. |
67b1fbb9 | 455 | |
ce5c1cf3 | 456 | Necessary to regenerate the top level @file{Makefile.in} file from |
67b1fbb9 KG |
457 | @file{Makefile.tpl} and @file{Makefile.def}. |
458 | ||
67b1fbb9 KG |
459 | @item Flex version 2.5.4 (or later) |
460 | ||
461 | Necessary when modifying @file{*.l} files. | |
462 | ||
463 | Necessary to build GCC during development because the generated output | |
80521187 | 464 | files are not included in the SVN repository. They are included in |
67b1fbb9 KG |
465 | releases. |
466 | ||
7326a39e | 467 | @item Texinfo version 4.7 (or later) |
67b1fbb9 KG |
468 | |
469 | Necessary for running @command{makeinfo} when modifying @file{*.texi} | |
470 | files to test your changes. | |
471 | ||
cc5c2741 BM |
472 | Necessary for running @command{make dvi} or @command{make pdf} to |
473 | create printable documentation in DVI or PDF format. Texinfo version | |
474 | 4.8 or later is required for @command{make pdf}. | |
475 | ||
67b1fbb9 | 476 | Necessary to build GCC documentation during development because the |
80521187 | 477 | generated output files are not included in the SVN repository. They are |
67b1fbb9 KG |
478 | included in releases. |
479 | ||
480 | @item @TeX{} (any working version) | |
481 | ||
ff2ce160 | 482 | Necessary for running @command{texi2dvi} and @command{texi2pdf}, which |
cc5c2741 BM |
483 | are used when running @command{make dvi} or @command{make pdf} to create |
484 | DVI or PDF files, respectively. | |
67b1fbb9 | 485 | |
35485da9 DM |
486 | @item Sphinx version 1.0 (or later) |
487 | ||
488 | Necessary to regenerate @file{jit/docs/_build/texinfo} from the @file{.rst} | |
489 | files in the directories below @file{jit/docs}. | |
490 | ||
80521187 GP |
491 | @item SVN (any version) |
492 | @itemx SSH (any version) | |
67b1fbb9 | 493 | |
80521187 | 494 | Necessary to access the SVN repository. Public releases and weekly |
8a36672b | 495 | snapshots of the development sources are also available via FTP@. |
67b1fbb9 | 496 | |
67b1fbb9 KG |
497 | @item GNU diffutils version 2.7 (or later) |
498 | ||
80521187 | 499 | Useful when submitting patches for the GCC source code. |
67b1fbb9 KG |
500 | |
501 | @item patch version 2.5.4 (or later) | |
502 | ||
503 | Necessary when applying patches, created with @command{diff}, to one's | |
504 | own sources. | |
505 | ||
506 | @end table | |
507 | ||
508 | @html | |
509 | <hr /> | |
510 | <p> | |
511 | @end html | |
512 | @ifhtml | |
513 | @uref{./index.html,,Return to the GCC Installation page} | |
514 | @end ifhtml | |
515 | @end ifset | |
516 | ||
f42974dc | 517 | @c ***Downloading the source************************************************** |
6cfb3f16 | 518 | @ifnothtml |
f42974dc | 519 | @comment node-name, next, previous, up |
67b1fbb9 | 520 | @node Downloading the source, Configuration, Prerequisites, Installing GCC |
6cfb3f16 | 521 | @end ifnothtml |
f42974dc | 522 | @ifset downloadhtml |
f42974dc DW |
523 | @ifnothtml |
524 | @chapter Downloading GCC | |
525 | @end ifnothtml | |
526 | @cindex Downloading GCC | |
527 | @cindex Downloading the Source | |
528 | ||
80521187 | 529 | GCC is distributed via @uref{http://gcc.gnu.org/svn.html,,SVN} and FTP |
eea81d3e | 530 | tarballs compressed with @command{gzip} or |
47876a2a | 531 | @command{bzip2}. |
f42974dc | 532 | |
962e6e00 | 533 | Please refer to the @uref{http://gcc.gnu.org/releases.html,,releases web page} |
161d7b59 | 534 | for information on how to obtain GCC@. |
f42974dc | 535 | |
97a2feb6 | 536 | The source distribution includes the C, C++, Objective-C, Fortran, |
47876a2a | 537 | and Ada (in the case of GCC 3.1 and later) compilers, as well as |
97a2feb6 | 538 | runtime libraries for C++, Objective-C, and Fortran. |
47876a2a JW |
539 | For previous versions these were downloadable as separate components such |
540 | as the core GCC distribution, which included the C language front end and | |
541 | shared components, and language-specific distributions including the | |
542 | language front end and the language runtime (where appropriate). | |
f42974dc DW |
543 | |
544 | If you also intend to build binutils (either to upgrade an existing | |
545 | installation or for use in place of the corresponding tools of your | |
546 | OS), unpack the binutils distribution either in the same directory or | |
547 | a separate one. In the latter case, add symbolic links to any | |
548 | components of the binutils you intend to build alongside the compiler | |
6cfb3f16 JM |
549 | (@file{bfd}, @file{binutils}, @file{gas}, @file{gprof}, @file{ld}, |
550 | @file{opcodes}, @dots{}) to the directory containing the GCC sources. | |
f42974dc | 551 | |
f9bab007 | 552 | Likewise the GMP, MPFR and MPC libraries can be automatically built |
e3f68e2c | 553 | together with GCC. You may simply run the |
7b5dccb5 | 554 | @command{contrib/download_prerequisites} script in the GCC source directory |
cce7bb9d | 555 | to set up everything. |
e3f68e2c | 556 | Otherwise unpack the GMP, MPFR and/or MPC source |
f9bab007 KG |
557 | distributions in the directory containing the GCC sources and rename |
558 | their directories to @file{gmp}, @file{mpfr} and @file{mpc}, | |
559 | respectively (or use symbolic links with the same name). | |
641afcff | 560 | |
f42974dc | 561 | @html |
b8db17af | 562 | <hr /> |
f42974dc DW |
563 | <p> |
564 | @end html | |
565 | @ifhtml | |
566 | @uref{./index.html,,Return to the GCC Installation page} | |
567 | @end ifhtml | |
568 | @end ifset | |
569 | ||
570 | @c ***Configuration*********************************************************** | |
6cfb3f16 | 571 | @ifnothtml |
f42974dc DW |
572 | @comment node-name, next, previous, up |
573 | @node Configuration, Building, Downloading the source, Installing GCC | |
6cfb3f16 | 574 | @end ifnothtml |
f42974dc | 575 | @ifset configurehtml |
f42974dc DW |
576 | @ifnothtml |
577 | @chapter Installing GCC: Configuration | |
578 | @end ifnothtml | |
579 | @cindex Configuration | |
580 | @cindex Installing GCC: Configuration | |
581 | ||
582 | Like most GNU software, GCC must be configured before it can be built. | |
583 | This document describes the recommended configuration procedure | |
584 | for both native and cross targets. | |
585 | ||
38209993 LG |
586 | We use @var{srcdir} to refer to the toplevel source directory for |
587 | GCC; we use @var{objdir} to refer to the toplevel build/object directory. | |
588 | ||
80521187 | 589 | If you obtained the sources via SVN, @var{srcdir} must refer to the top |
0b70519f RW |
590 | @file{gcc} directory, the one where the @file{MAINTAINERS} file can be |
591 | found, and not its @file{gcc} subdirectory, otherwise the build will fail. | |
f42974dc | 592 | |
b4b0fb02 RO |
593 | If either @var{srcdir} or @var{objdir} is located on an automounted NFS |
594 | file system, the shell's built-in @command{pwd} command will return | |
595 | temporary pathnames. Using these can lead to various sorts of build | |
596 | problems. To avoid this issue, set the @env{PWDCMD} environment | |
597 | variable to an automounter-aware @command{pwd} command, e.g., | |
7ba4ca63 | 598 | @command{pawd} or @samp{amq -w}, during the configuration and build |
b4b0fb02 RO |
599 | phases. |
600 | ||
102b60d1 | 601 | First, we @strong{highly} recommend that GCC be built into a |
0b70519f | 602 | separate directory from the sources which does @strong{not} reside |
102b60d1 GP |
603 | within the source tree. This is how we generally build GCC; building |
604 | where @var{srcdir} == @var{objdir} should still work, but doesn't | |
605 | get extensive testing; building where @var{objdir} is a subdirectory | |
606 | of @var{srcdir} is unsupported. | |
f42974dc | 607 | |
eea81d3e | 608 | If you have previously built GCC in the same directory for a |
f85b8d1a | 609 | different target machine, do @samp{make distclean} to delete all files |
377dfc82 GP |
610 | that might be invalid. One of the files this deletes is @file{Makefile}; |
611 | if @samp{make distclean} complains that @file{Makefile} does not exist | |
612 | or issues a message like ``don't know how to make distclean'' it probably | |
613 | means that the directory is already suitably clean. However, with the | |
614 | recommended method of building in a separate @var{objdir}, you should | |
615 | simply use a different @var{objdir} for each target. | |
f85b8d1a | 616 | |
38209993 LG |
617 | Second, when configuring a native system, either @command{cc} or |
618 | @command{gcc} must be in your path or you must set @env{CC} in | |
df002c7d DE |
619 | your environment before running configure. Otherwise the configuration |
620 | scripts may fail. | |
f42974dc | 621 | |
cc11cc9b | 622 | @ignore |
eea81d3e RO |
623 | Note that the bootstrap compiler and the resulting GCC must be link |
624 | compatible, else the bootstrap will fail with linker errors about | |
625 | incompatible object file formats. Several multilibed targets are | |
e69aa433 GP |
626 | affected by this requirement, see |
627 | @ifnothtml | |
628 | @ref{Specific, host/target specific installation notes}. | |
629 | @end ifnothtml | |
c009f01f | 630 | @ifhtml |
e69aa433 | 631 | @uref{specific.html,,host/target specific installation notes}. |
c009f01f | 632 | @end ifhtml |
cc11cc9b | 633 | @end ignore |
eea81d3e | 634 | |
f42974dc DW |
635 | To configure GCC: |
636 | ||
3ab51846 | 637 | @smallexample |
98797784 RW |
638 | % mkdir @var{objdir} |
639 | % cd @var{objdir} | |
640 | % @var{srcdir}/configure [@var{options}] [@var{target}] | |
3ab51846 | 641 | @end smallexample |
f42974dc | 642 | |
2f41c1d6 PB |
643 | @heading Distributor options |
644 | ||
645 | If you will be distributing binary versions of GCC, with modifications | |
646 | to the source code, you should use the options described in this | |
647 | section to make clear that your version contains modifications. | |
648 | ||
649 | @table @code | |
650 | @item --with-pkgversion=@var{version} | |
651 | Specify a string that identifies your package. You may wish | |
652 | to include a build number or build date. This version string will be | |
653 | included in the output of @command{gcc --version}. This suffix does | |
654 | not replace the default version string, only the @samp{GCC} part. | |
655 | ||
656 | The default value is @samp{GCC}. | |
657 | ||
658 | @item --with-bugurl=@var{url} | |
659 | Specify the URL that users should visit if they wish to report a bug. | |
660 | You are of course welcome to forward bugs reported to you to the FSF, | |
661 | if you determine that they are not bugs in your modifications. | |
662 | ||
663 | The default value refers to the FSF's GCC bug tracker. | |
664 | ||
665 | @end table | |
f42974dc | 666 | |
ef88b07d | 667 | @heading Target specification |
f42974dc DW |
668 | @itemize @bullet |
669 | @item | |
38209993 | 670 | GCC has code to correctly determine the correct value for @var{target} |
0b70519f RW |
671 | for nearly all native systems. Therefore, we highly recommend you do |
672 | not provide a configure target when configuring a native compiler. | |
f42974dc DW |
673 | |
674 | @item | |
6cfb3f16 | 675 | @var{target} must be specified as @option{--target=@var{target}} |
f9047ed3 | 676 | when configuring a cross compiler; examples of valid targets would be |
52c0e446 | 677 | m68k-elf, sh-elf, etc. |
f42974dc DW |
678 | |
679 | @item | |
6cfb3f16 | 680 | Specifying just @var{target} instead of @option{--target=@var{target}} |
38209993 | 681 | implies that the host defaults to @var{target}. |
f42974dc DW |
682 | @end itemize |
683 | ||
684 | ||
ef88b07d | 685 | @heading Options specification |
f42974dc | 686 | |
ef88b07d | 687 | Use @var{options} to override several configure time options for |
7ba4ca63 | 688 | GCC@. A list of supported @var{options} follows; @samp{configure |
80f9249a JM |
689 | --help} may list other options, but those not listed below may not |
690 | work and should not normally be used. | |
f42974dc | 691 | |
c1c3bb0c ME |
692 | Note that each @option{--enable} option has a corresponding |
693 | @option{--disable} option and that each @option{--with} option has a | |
694 | corresponding @option{--without} option. | |
695 | ||
ef88b07d JM |
696 | @table @code |
697 | @item --prefix=@var{dirname} | |
698 | Specify the toplevel installation | |
f42974dc DW |
699 | directory. This is the recommended way to install the tools into a directory |
700 | other than the default. The toplevel installation directory defaults to | |
6cfb3f16 | 701 | @file{/usr/local}. |
f42974dc | 702 | |
38209993 | 703 | We @strong{highly} recommend against @var{dirname} being the same or a |
a7582c8c BE |
704 | subdirectory of @var{objdir} or vice versa. If specifying a directory |
705 | beneath a user's home directory tree, some shells will not expand | |
706 | @var{dirname} correctly if it contains the @samp{~} metacharacter; use | |
707 | @env{$HOME} instead. | |
f42974dc | 708 | |
8e5f33ff GK |
709 | The following standard @command{autoconf} options are supported. Normally you |
710 | should not need to use these options. | |
ef88b07d | 711 | @table @code |
ab130aa5 JM |
712 | @item --exec-prefix=@var{dirname} |
713 | Specify the toplevel installation directory for architecture-dependent | |
714 | files. The default is @file{@var{prefix}}. | |
715 | ||
716 | @item --bindir=@var{dirname} | |
717 | Specify the installation directory for the executables called by users | |
718 | (such as @command{gcc} and @command{g++}). The default is | |
719 | @file{@var{exec-prefix}/bin}. | |
720 | ||
721 | @item --libdir=@var{dirname} | |
722 | Specify the installation directory for object code libraries and | |
8e5f33ff GK |
723 | internal data files of GCC@. The default is @file{@var{exec-prefix}/lib}. |
724 | ||
725 | @item --libexecdir=@var{dirname} | |
726 | Specify the installation directory for internal executables of GCC@. | |
6ccde948 | 727 | The default is @file{@var{exec-prefix}/libexec}. |
ab130aa5 JM |
728 | |
729 | @item --with-slibdir=@var{dirname} | |
730 | Specify the installation directory for the shared libgcc library. The | |
731 | default is @file{@var{libdir}}. | |
732 | ||
70fa0efa RW |
733 | @item --datarootdir=@var{dirname} |
734 | Specify the root of the directory tree for read-only architecture-independent | |
735 | data files referenced by GCC@. The default is @file{@var{prefix}/share}. | |
736 | ||
ab130aa5 JM |
737 | @item --infodir=@var{dirname} |
738 | Specify the installation directory for documentation in info format. | |
70fa0efa | 739 | The default is @file{@var{datarootdir}/info}. |
ab130aa5 | 740 | |
8567c70f TT |
741 | @item --datadir=@var{dirname} |
742 | Specify the installation directory for some architecture-independent | |
70fa0efa RW |
743 | data files referenced by GCC@. The default is @file{@var{datarootdir}}. |
744 | ||
745 | @item --docdir=@var{dirname} | |
746 | Specify the installation directory for documentation files (other | |
747 | than Info) for GCC@. The default is @file{@var{datarootdir}/doc}. | |
748 | ||
749 | @item --htmldir=@var{dirname} | |
750 | Specify the installation directory for HTML documentation files. | |
751 | The default is @file{@var{docdir}}. | |
752 | ||
753 | @item --pdfdir=@var{dirname} | |
754 | Specify the installation directory for PDF documentation files. | |
755 | The default is @file{@var{docdir}}. | |
8567c70f | 756 | |
ab130aa5 JM |
757 | @item --mandir=@var{dirname} |
758 | Specify the installation directory for manual pages. The default is | |
70fa0efa RW |
759 | @file{@var{datarootdir}/man}. (Note that the manual pages are only extracts |
760 | from the full GCC manuals, which are provided in Texinfo format. The manpages | |
ab130aa5 JM |
761 | are derived by an automatic conversion process from parts of the full |
762 | manual.) | |
763 | ||
ef88b07d JM |
764 | @item --with-gxx-include-dir=@var{dirname} |
765 | Specify | |
ae5cc016 MM |
766 | the installation directory for G++ header files. The default depends |
767 | on other configuration options, and differs between cross and native | |
768 | configurations. | |
ecb7d6b3 | 769 | |
1cec1285 NS |
770 | @item --with-specs=@var{specs} |
771 | Specify additional command line driver SPECS. | |
772 | This can be useful if you need to turn on a non-standard feature by | |
773 | default without modifying the compiler's source code, for instance | |
774 | @option{--with-specs=%@{!fcommon:%@{!fno-common:-fno-common@}@}}. | |
775 | @ifnothtml | |
776 | @xref{Spec Files,, Specifying subprocesses and the switches to pass to them, | |
777 | gcc, Using the GNU Compiler Collection (GCC)}, | |
778 | @end ifnothtml | |
779 | @ifhtml | |
780 | See ``Spec Files'' in the main manual | |
781 | @end ifhtml | |
782 | ||
ef88b07d | 783 | @end table |
f42974dc | 784 | |
b21d216c AF |
785 | @item --program-prefix=@var{prefix} |
786 | GCC supports some transformations of the names of its programs when | |
8a36672b JM |
787 | installing them. This option prepends @var{prefix} to the names of |
788 | programs to install in @var{bindir} (see above). For example, specifying | |
b21d216c AF |
789 | @option{--program-prefix=foo-} would result in @samp{gcc} |
790 | being installed as @file{/usr/local/bin/foo-gcc}. | |
791 | ||
792 | @item --program-suffix=@var{suffix} | |
793 | Appends @var{suffix} to the names of programs to install in @var{bindir} | |
8a36672b | 794 | (see above). For example, specifying @option{--program-suffix=-3.1} |
b21d216c AF |
795 | would result in @samp{gcc} being installed as |
796 | @file{/usr/local/bin/gcc-3.1}. | |
797 | ||
798 | @item --program-transform-name=@var{pattern} | |
799 | Applies the @samp{sed} script @var{pattern} to be applied to the names | |
8a36672b | 800 | of programs to install in @var{bindir} (see above). @var{pattern} has to |
b21d216c | 801 | consist of one or more basic @samp{sed} editing commands, separated by |
8a36672b | 802 | semicolons. For example, if you want the @samp{gcc} program name to be |
b21d216c AF |
803 | transformed to the installed program @file{/usr/local/bin/myowngcc} and |
804 | the @samp{g++} program name to be transformed to | |
805 | @file{/usr/local/bin/gspecial++} without changing other program names, | |
806 | you could use the pattern | |
807 | @option{--program-transform-name='s/^gcc$/myowngcc/; s/^g++$/gspecial++/'} | |
808 | to achieve this effect. | |
809 | ||
810 | All three options can be combined and used together, resulting in more | |
8a36672b | 811 | complex conversion patterns. As a basic rule, @var{prefix} (and |
b21d216c AF |
812 | @var{suffix}) are prepended (appended) before further transformations |
813 | can happen with a special transformation script @var{pattern}. | |
814 | ||
8c085f6f | 815 | As currently implemented, this option only takes effect for native |
b21d216c | 816 | builds; cross compiler binaries' names are not transformed even when a |
8c085f6f | 817 | transformation is explicitly asked for by one of these options. |
b21d216c AF |
818 | |
819 | For native builds, some of the installed programs are also installed | |
820 | with the target alias in front of their name, as in | |
8a36672b | 821 | @samp{i686-pc-linux-gnu-gcc}. All of the above transformations happen |
78466c0e | 822 | before the target alias is prepended to the name---so, specifying |
b21d216c AF |
823 | @option{--program-prefix=foo-} and @option{program-suffix=-3.1}, the |
824 | resulting binary would be installed as | |
825 | @file{/usr/local/bin/i686-pc-linux-gnu-foo-gcc-3.1}. | |
826 | ||
8ecab453 | 827 | As a last shortcoming, none of the installed Ada programs are |
b21d216c AF |
828 | transformed yet, which will be fixed in some time. |
829 | ||
ef88b07d JM |
830 | @item --with-local-prefix=@var{dirname} |
831 | Specify the | |
6ac48571 JM |
832 | installation directory for local include files. The default is |
833 | @file{/usr/local}. Specify this option if you want the compiler to | |
834 | search directory @file{@var{dirname}/include} for locally installed | |
835 | header files @emph{instead} of @file{/usr/local/include}. | |
836 | ||
837 | You should specify @option{--with-local-prefix} @strong{only} if your | |
838 | site has a different convention (not @file{/usr/local}) for where to put | |
839 | site-specific files. | |
840 | ||
841 | The default value for @option{--with-local-prefix} is @file{/usr/local} | |
842 | regardless of the value of @option{--prefix}. Specifying | |
843 | @option{--prefix} has no effect on which directory GCC searches for | |
844 | local header files. This may seem counterintuitive, but actually it is | |
845 | logical. | |
846 | ||
847 | The purpose of @option{--prefix} is to specify where to @emph{install | |
848 | GCC}. The local header files in @file{/usr/local/include}---if you put | |
161d7b59 | 849 | any in that directory---are not part of GCC@. They are part of other |
6ac48571 JM |
850 | programs---perhaps many others. (GCC installs its own header files in |
851 | another directory which is based on the @option{--prefix} value.) | |
852 | ||
48209ce5 | 853 | Both the local-prefix include directory and the GCC-prefix include |
78466c0e | 854 | directory are part of GCC's ``system include'' directories. Although these |
48209ce5 JDA |
855 | two directories are not fixed, they need to be searched in the proper |
856 | order for the correct processing of the include_next directive. The | |
857 | local-prefix include directory is searched before the GCC-prefix | |
858 | include directory. Another characteristic of system include directories | |
859 | is that pedantic warnings are turned off for headers in these directories. | |
860 | ||
861 | Some autoconf macros add @option{-I @var{directory}} options to the | |
862 | compiler command line, to ensure that directories containing installed | |
863 | packages' headers are searched. When @var{directory} is one of GCC's | |
864 | system include directories, GCC will ignore the option so that system | |
865 | directories continue to be processed in the correct order. This | |
866 | may result in a search order different from what was specified but the | |
867 | directory will still be searched. | |
868 | ||
869 | GCC automatically searches for ordinary libraries using | |
870 | @env{GCC_EXEC_PREFIX}. Thus, when the same installation prefix is | |
871 | used for both GCC and packages, GCC will automatically search for | |
872 | both headers and libraries. This provides a configuration that is | |
873 | easy to use. GCC behaves in a manner similar to that when it is | |
874 | installed as a system compiler in @file{/usr}. | |
875 | ||
876 | Sites that need to install multiple versions of GCC may not want to | |
877 | use the above simple configuration. It is possible to use the | |
878 | @option{--program-prefix}, @option{--program-suffix} and | |
879 | @option{--program-transform-name} options to install multiple versions | |
880 | into a single directory, but it may be simpler to use different prefixes | |
881 | and the @option{--with-local-prefix} option to specify the location of the | |
882 | site-specific files for each version. It will then be necessary for | |
883 | users to specify explicitly the location of local site libraries | |
884 | (e.g., with @env{LIBRARY_PATH}). | |
885 | ||
886 | The same value can be used for both @option{--with-local-prefix} and | |
887 | @option{--prefix} provided it is not @file{/usr}. This can be used | |
888 | to avoid the default search of @file{/usr/local/include}. | |
889 | ||
6ac48571 JM |
890 | @strong{Do not} specify @file{/usr} as the @option{--with-local-prefix}! |
891 | The directory you use for @option{--with-local-prefix} @strong{must not} | |
892 | contain any of the system's standard header files. If it did contain | |
893 | them, certain programs would be miscompiled (including GNU Emacs, on | |
894 | certain targets), because this would override and nullify the header | |
4c64396e | 895 | file corrections made by the @command{fixincludes} script. |
6ac48571 JM |
896 | |
897 | Indications are that people who use this option use it based on mistaken | |
898 | ideas of what it is for. People use it as if it specified where to | |
161d7b59 | 899 | install part of GCC@. Perhaps they make this assumption because |
6ac48571 JM |
900 | installing GCC creates the directory. |
901 | ||
3c36aa6b JJ |
902 | @item --with-gcc-major-version-only |
903 | Specifies that GCC should use only the major number rather than | |
904 | @var{major}.@var{minor}.@var{patchlevel} in filesystem paths. | |
905 | ||
08b2bad2 SB |
906 | @item --with-native-system-header-dir=@var{dirname} |
907 | Specifies that @var{dirname} is the directory that contains native system | |
908 | header files, rather than @file{/usr/include}. This option is most useful | |
909 | if you are creating a compiler that should be isolated from the system | |
910 | as much as possible. It is most commonly used with the | |
911 | @option{--with-sysroot} option and will cause GCC to search | |
912 | @var{dirname} inside the system root specified by that option. | |
913 | ||
6cfb3f16 | 914 | @item --enable-shared[=@var{package}[,@dots{}]] |
0cb98517 AO |
915 | Build shared versions of libraries, if shared libraries are supported on |
916 | the target platform. Unlike GCC 2.95.x and earlier, shared libraries | |
07659e97 | 917 | are enabled by default on all platforms that support shared libraries. |
0cb98517 AO |
918 | |
919 | If a list of packages is given as an argument, build shared libraries | |
920 | only for the listed packages. For other packages, only static libraries | |
921 | will be built. Package names currently recognized in the GCC tree are | |
922 | @samp{libgcc} (also known as @samp{gcc}), @samp{libstdc++} (not | |
e22df315 | 923 | @samp{libstdc++-v3}), @samp{libffi}, @samp{zlib}, @samp{boehm-gc}, |
97a2feb6 | 924 | @samp{ada}, @samp{libada}, @samp{libgo}, and @samp{libobjc}. |
55c45226 | 925 | Note @samp{libiberty} does not support shared libraries at all. |
0cb98517 AO |
926 | |
927 | Use @option{--disable-shared} to build only static libraries. Note that | |
928 | @option{--disable-shared} does not accept a list of package names as | |
929 | argument, only @option{--enable-shared} does. | |
f42974dc | 930 | |
459260ec DM |
931 | Contrast with @option{--enable-host-shared}, which affects @emph{host} |
932 | code. | |
933 | ||
934 | @item --enable-host-shared | |
935 | Specify that the @emph{host} code should be built into position-independent | |
936 | machine code (with -fPIC), allowing it to be used within shared libraries, | |
937 | but yielding a slightly slower compiler. | |
938 | ||
35485da9 | 939 | This option is required when building the libgccjit.so library. |
459260ec DM |
940 | |
941 | Contrast with @option{--enable-shared}, which affects @emph{target} | |
942 | libraries. | |
943 | ||
ef88b07d JM |
944 | @item @anchor{with-gnu-as}--with-gnu-as |
945 | Specify that the compiler should assume that the | |
767094dd | 946 | assembler it finds is the GNU assembler. However, this does not modify |
377dfc82 GP |
947 | the rules to find an assembler and will result in confusion if the |
948 | assembler found is not actually the GNU assembler. (Confusion may also | |
8c26c999 JM |
949 | result if the compiler finds the GNU assembler but has not been |
950 | configured with @option{--with-gnu-as}.) If you have more than one | |
38209993 | 951 | assembler installed on your system, you may want to use this option in |
cc11cc9b PB |
952 | connection with @option{--with-as=@var{pathname}} or |
953 | @option{--with-build-time-tools=@var{pathname}}. | |
38209993 | 954 | |
8c085f6f JJ |
955 | The following systems are the only ones where it makes a difference |
956 | whether you use the GNU assembler. On any other system, | |
957 | @option{--with-gnu-as} has no effect. | |
958 | ||
2ff16718 | 959 | @itemize @bullet |
8c085f6f JJ |
960 | @item @samp{hppa1.0-@var{any}-@var{any}} |
961 | @item @samp{hppa1.1-@var{any}-@var{any}} | |
8f2afc21 EB |
962 | @item @samp{sparc-sun-solaris2.@var{any}} |
963 | @item @samp{sparc64-@var{any}-solaris2.@var{any}} | |
8c085f6f | 964 | @end itemize |
8c26c999 | 965 | |
8f2afc21 | 966 | @item @anchor{with-as}--with-as=@var{pathname} |
cc11cc9b PB |
967 | Specify that the compiler should use the assembler pointed to by |
968 | @var{pathname}, rather than the one found by the standard rules to find | |
969 | an assembler, which are: | |
f42974dc DW |
970 | @itemize @bullet |
971 | @item | |
cc11cc9b PB |
972 | Unless GCC is being built with a cross compiler, check the |
973 | @file{@var{libexec}/gcc/@var{target}/@var{version}} directory. | |
974 | @var{libexec} defaults to @file{@var{exec-prefix}/libexec}; | |
975 | @var{exec-prefix} defaults to @var{prefix}, which | |
976 | defaults to @file{/usr/local} unless overridden by the | |
977 | @option{--prefix=@var{pathname}} switch described above. @var{target} | |
978 | is the target system triple, such as @samp{sparc-sun-solaris2.7}, and | |
979 | @var{version} denotes the GCC version, such as 3.0. | |
980 | ||
f42974dc | 981 | @item |
cc11cc9b PB |
982 | If the target system is the same that you are building on, check |
983 | operating system specific directories (e.g.@: @file{/usr/ccs/bin} on | |
250d5688 | 984 | Sun Solaris 2). |
cc11cc9b PB |
985 | |
986 | @item | |
987 | Check in the @env{PATH} for a tool whose name is prefixed by the | |
988 | target system triple. | |
989 | ||
990 | @item | |
991 | Check in the @env{PATH} for a tool whose name is not prefixed by the | |
992 | target system triple, if the host and target system triple are | |
993 | the same (in other words, we use a host tool if it can be used for | |
994 | the target as well). | |
f42974dc | 995 | @end itemize |
cc11cc9b PB |
996 | |
997 | You may want to use @option{--with-as} if no assembler | |
998 | is installed in the directories listed above, or if you have multiple | |
999 | assemblers installed and want to choose one that is not found by the | |
1000 | above rules. | |
f42974dc | 1001 | |
ef88b07d JM |
1002 | @item @anchor{with-gnu-ld}--with-gnu-ld |
1003 | Same as @uref{#with-gnu-as,,@option{--with-gnu-as}} | |
8f2afc21 | 1004 | but for the linker. |
f42974dc | 1005 | |
eea81d3e | 1006 | @item --with-ld=@var{pathname} |
8f2afc21 EB |
1007 | Same as @uref{#with-as,,@option{--with-as}} |
1008 | but for the linker. | |
f42974dc | 1009 | |
ef88b07d JM |
1010 | @item --with-stabs |
1011 | Specify that stabs debugging | |
38209993 LG |
1012 | information should be used instead of whatever format the host normally |
1013 | uses. Normally GCC uses the same debug format as the host system. | |
f42974dc | 1014 | |
ccdc2164 NS |
1015 | @item --with-tls=@var{dialect} |
1016 | Specify the default TLS dialect, for systems were there is a choice. | |
1017 | For ARM targets, possible values for @var{dialect} are @code{gnu} or | |
1018 | @code{gnu2}, which select between the original GNU dialect and the GNU TLS | |
1019 | descriptor-based dialect. | |
1020 | ||
e0cdc09f MK |
1021 | @item --enable-multiarch |
1022 | Specify whether to enable or disable multiarch support. The default is | |
1023 | to check for glibc start files in a multiarch location, and enable it | |
1024 | if the files are found. The auto detection is enabled for native builds, | |
1025 | and for cross builds configured with @option{--with-sysroot}, and without | |
1026 | @option{--with-native-system-header-dir}. | |
1027 | More documentation about multiarch can be found at | |
3b973a7f | 1028 | @uref{https://wiki.debian.org/Multiarch}. |
e0cdc09f | 1029 | |
4dbe373c EB |
1030 | @item --enable-sjlj-exceptions |
1031 | Force use of the @code{setjmp}/@code{longjmp}-based scheme for exceptions. | |
1032 | @samp{configure} ordinarily picks the correct value based on the platform. | |
1033 | Only use this option if you are sure you need a different setting. | |
1034 | ||
87f3fea8 CT |
1035 | @item --enable-vtable-verify |
1036 | Specify whether to enable or disable the vtable verification feature. | |
1037 | Enabling this feature causes libstdc++ to be built with its virtual calls | |
1038 | in verifiable mode. This means that, when linked with libvtv, every | |
1039 | virtual call in libstdc++ will verify the vtable pointer through which the | |
1040 | call will be made before actually making the call. If not linked with libvtv, | |
1041 | the verifier will call stub functions (in libstdc++ itself) and do nothing. | |
1042 | If vtable verification is disabled, then libstdc++ is not built with its | |
1043 | virtual calls in verifiable mode at all. However the libvtv library will | |
1044 | still be built (see @option{--disable-libvtv} to turn off building libvtv). | |
1045 | @option{--disable-vtable-verify} is the default. | |
1046 | ||
f4d9c89a MK |
1047 | @item --disable-multilib |
1048 | Specify that multiple target | |
1049 | libraries to support different target variants, calling | |
1050 | conventions, etc.@: should not be built. The default is to build a | |
1051 | predefined set of them. | |
1052 | ||
e8515283 DE |
1053 | Some targets provide finer-grained control over which multilibs are built |
1054 | (e.g., @option{--disable-softfloat}): | |
1055 | @table @code | |
e8515283 DE |
1056 | @item arm-*-* |
1057 | fpu, 26bit, underscore, interwork, biendian, nofmult. | |
1058 | ||
1059 | @item m68*-*-* | |
1060 | softfloat, m68881, m68000, m68020. | |
1061 | ||
1062 | @item mips*-*-* | |
1063 | single-float, biendian, softfloat. | |
1064 | ||
1065 | @item powerpc*-*-*, rs6000*-*-* | |
1066 | aix64, pthread, softfloat, powercpu, powerpccpu, powerpcos, biendian, | |
f282ffb3 | 1067 | sysv, aix. |
e8515283 DE |
1068 | |
1069 | @end table | |
1070 | ||
aca600aa AS |
1071 | @item --with-multilib-list=@var{list} |
1072 | @itemx --without-multilib-list | |
3e0201f0 TP |
1073 | Specify what multilibs to build. @var{list} is a comma separated list of |
1074 | values, possibly consisting of a single value. Currently only implemented | |
1075 | for arm*-*-*, sh*-*-* and x86-64-*-linux*. The accepted values and meaning | |
1076 | for each target is given below. | |
aca600aa | 1077 | |
f0ea7581 | 1078 | @table @code |
a10f2c25 | 1079 | @item arm*-*-* |
2f738ca5 TP |
1080 | @var{list} is a comma separated list of @code{aprofile} and @code{rmprofile} |
1081 | to build multilibs for A or R and M architecture profiles respectively. Note | |
1082 | that, due to some limitation of the current multilib framework, using the | |
1083 | combined @code{aprofile,rmprofile} multilibs selects in some cases a less | |
1084 | optimal multilib than when using the multilib profile for the architecture | |
1085 | targetted. The special value @code{default} is also accepted and is equivalent | |
1086 | to omitting the option, ie. only the default run-time library will be enabled. | |
3e0201f0 TP |
1087 | |
1088 | The table below gives the combination of ISAs, architectures, FPUs and | |
1089 | floating-point ABIs for which multilibs are built for each accepted value. | |
2f738ca5 TP |
1090 | The union of these options is considered when specifying both @code{aprofile} |
1091 | and @code{rmprofile}. | |
3e0201f0 TP |
1092 | |
1093 | @multitable @columnfractions .15 .28 .30 | |
1094 | @item Option @tab aprofile @tab rmprofile | |
1095 | @item ISAs | |
1096 | @tab @code{-marm} and @code{-mthumb} | |
1097 | @tab @code{-mthumb} | |
1098 | @item Architectures@*@*@*@*@*@* | |
1099 | @tab default architecture@* | |
1100 | @code{-march=armv7-a}@* | |
1101 | @code{-march=armv7ve}@* | |
1102 | @code{-march=armv8-a}@*@*@* | |
1103 | @tab default architecture@* | |
1104 | @code{-march=armv6s-m}@* | |
1105 | @code{-march=armv7-m}@* | |
1106 | @code{-march=armv7e-m}@* | |
1107 | @code{-march=armv8-m.base}@* | |
1108 | @code{-march=armv8-m.main}@* | |
1109 | @code{-march=armv7} | |
1110 | @item FPUs@*@*@*@*@* | |
1111 | @tab none@* | |
1112 | @code{-mfpu=vfpv3-d16}@* | |
1113 | @code{-mfpu=neon}@* | |
1114 | @code{-mfpu=vfpv4-d16}@* | |
1115 | @code{-mfpu=neon-vfpv4}@* | |
1116 | @code{-mfpu=neon-fp-armv8} | |
1117 | @tab none@* | |
1118 | @code{-mfpu=vfpv3-d16}@* | |
1119 | @code{-mfpu=fpv4-sp-d16}@* | |
1120 | @code{-mfpu=fpv5-sp-d16}@* | |
1121 | @code{-mfpu=fpv5-d16}@* | |
1122 | @item floating-point@/ ABIs@*@* | |
1123 | @tab @code{-mfloat-abi=soft}@* | |
1124 | @code{-mfloat-abi=softfp}@* | |
1125 | @code{-mfloat-abi=hard} | |
1126 | @tab @code{-mfloat-abi=soft}@* | |
1127 | @code{-mfloat-abi=softfp}@* | |
1128 | @code{-mfloat-abi=hard} | |
1129 | @end multitable | |
a10f2c25 | 1130 | |
f0ea7581 | 1131 | @item sh*-*-* |
aca600aa AS |
1132 | @var{list} is a comma separated list of CPU names. These must be of the |
1133 | form @code{sh*} or @code{m*} (in which case they match the compiler option | |
1134 | for that processor). The list should not contain any endian options - | |
1135 | these are handled by @option{--with-endian}. | |
1136 | ||
1137 | If @var{list} is empty, then there will be no multilibs for extra | |
1138 | processors. The multilib for the secondary endian remains enabled. | |
1139 | ||
1140 | As a special case, if an entry in the list starts with a @code{!} | |
1141 | (exclamation point), then it is added to the list of excluded multilibs. | |
1142 | Entries of this sort should be compatible with @samp{MULTILIB_EXCLUDES} | |
1143 | (once the leading @code{!} has been stripped). | |
1144 | ||
1145 | If @option{--with-multilib-list} is not given, then a default set of | |
1146 | multilibs is selected based on the value of @option{--target}. This is | |
1147 | usually the complete set of libraries, but some targets imply a more | |
1148 | specialized subset. | |
1149 | ||
1150 | Example 1: to configure a compiler for SH4A only, but supporting both | |
1151 | endians, with little endian being the default: | |
1152 | @smallexample | |
1153 | --with-cpu=sh4a --with-endian=little,big --with-multilib-list= | |
1154 | @end smallexample | |
1155 | ||
1156 | Example 2: to configure a compiler for both SH4A and SH4AL-DSP, but with | |
1157 | only little endian SH4AL: | |
1158 | @smallexample | |
b7ae9eb5 RW |
1159 | --with-cpu=sh4a --with-endian=little,big \ |
1160 | --with-multilib-list=sh4al,!mb/m4al | |
aca600aa AS |
1161 | @end smallexample |
1162 | ||
f0ea7581 L |
1163 | @item x86-64-*-linux* |
1164 | @var{list} is a comma separated list of @code{m32}, @code{m64} and | |
1165 | @code{mx32} to enable 32-bit, 64-bit and x32 run-time libraries, | |
1166 | respectively. If @var{list} is empty, then there will be no multilibs | |
1167 | and only the default run-time library will be enabled. | |
1168 | ||
1169 | If @option{--with-multilib-list} is not given, then only 32-bit and | |
1170 | 64-bit run-time libraries will be enabled. | |
1171 | @end table | |
1172 | ||
aca600aa AS |
1173 | @item --with-endian=@var{endians} |
1174 | Specify what endians to use. | |
1175 | Currently only implemented for sh*-*-*. | |
1176 | ||
1177 | @var{endians} may be one of the following: | |
1178 | @table @code | |
1179 | @item big | |
1180 | Use big endian exclusively. | |
1181 | @item little | |
1182 | Use little endian exclusively. | |
1183 | @item big,little | |
1184 | Use big endian by default. Provide a multilib for little endian. | |
1185 | @item little,big | |
1186 | Use little endian by default. Provide a multilib for big endian. | |
1187 | @end table | |
1188 | ||
ef88b07d JM |
1189 | @item --enable-threads |
1190 | Specify that the target | |
38209993 | 1191 | supports threads. This affects the Objective-C compiler and runtime |
97a2feb6 | 1192 | library, and exception handling for other languages like C++. |
6ac48571 | 1193 | On some systems, this is the default. |
f42974dc | 1194 | |
f6160ed5 LR |
1195 | In general, the best (and, in many cases, the only known) threading |
1196 | model available will be configured for use. Beware that on some | |
2dd76960 | 1197 | systems, GCC has not been taught what threading models are generally |
3c6bb1db LR |
1198 | available for the system. In this case, @option{--enable-threads} is an |
1199 | alias for @option{--enable-threads=single}. | |
f6160ed5 LR |
1200 | |
1201 | @item --disable-threads | |
1202 | Specify that threading support should be disabled for the system. | |
3c6bb1db | 1203 | This is an alias for @option{--enable-threads=single}. |
f6160ed5 | 1204 | |
ef88b07d JM |
1205 | @item --enable-threads=@var{lib} |
1206 | Specify that | |
38209993 LG |
1207 | @var{lib} is the thread support library. This affects the Objective-C |
1208 | compiler and runtime library, and exception handling for other languages | |
97a2feb6 | 1209 | like C++. The possibilities for @var{lib} are: |
f85b8d1a JM |
1210 | |
1211 | @table @code | |
1212 | @item aix | |
1213 | AIX thread support. | |
1214 | @item dce | |
1215 | DCE thread support. | |
60bea929 RO |
1216 | @item lynx |
1217 | LynxOS thread support. | |
1218 | @item mipssde | |
1219 | MIPS SDE thread support. | |
f6160ed5 LR |
1220 | @item no |
1221 | This is an alias for @samp{single}. | |
f85b8d1a | 1222 | @item posix |
18167442 | 1223 | Generic POSIX/Unix98 thread support. |
f6160ed5 LR |
1224 | @item rtems |
1225 | RTEMS thread support. | |
f85b8d1a JM |
1226 | @item single |
1227 | Disable thread support, should work for all platforms. | |
60bea929 RO |
1228 | @item tpf |
1229 | TPF thread support. | |
f85b8d1a JM |
1230 | @item vxworks |
1231 | VxWorks thread support. | |
1232 | @item win32 | |
1233 | Microsoft Win32 API thread support. | |
1234 | @end table | |
f42974dc | 1235 | |
8dea1cca DD |
1236 | @item --enable-tls |
1237 | Specify that the target supports TLS (Thread Local Storage). Usually | |
1238 | configure can correctly determine if TLS is supported. In cases where | |
1239 | it guesses incorrectly, TLS can be explicitly enabled or disabled with | |
1240 | @option{--enable-tls} or @option{--disable-tls}. This can happen if | |
1241 | the assembler supports TLS but the C library does not, or if the | |
1242 | assumptions made by the configure test are incorrect. | |
1243 | ||
1244 | @item --disable-tls | |
1245 | Specify that the target does not support TLS. | |
1246 | This is an alias for @option{--enable-tls=no}. | |
1247 | ||
ef88b07d | 1248 | @item --with-cpu=@var{cpu} |
8981c15b JM |
1249 | @itemx --with-cpu-32=@var{cpu} |
1250 | @itemx --with-cpu-64=@var{cpu} | |
7816bea0 DJ |
1251 | Specify which cpu variant the compiler should generate code for by default. |
1252 | @var{cpu} will be used as the default value of the @option{-mcpu=} switch. | |
5d5f6720 JR |
1253 | This option is only supported on some targets, including ARC, ARM, i386, M68k, |
1254 | PowerPC, and SPARC@. It is mandatory for ARC@. The @option{--with-cpu-32} and | |
8981c15b | 1255 | @option{--with-cpu-64} options specify separate default CPUs for |
c5f0fe67 | 1256 | 32-bit and 64-bit modes; these options are only supported for i386, |
31177ef2 | 1257 | x86-64, PowerPC, and SPARC@. |
7816bea0 DJ |
1258 | |
1259 | @item --with-schedule=@var{cpu} | |
1260 | @itemx --with-arch=@var{cpu} | |
8981c15b JM |
1261 | @itemx --with-arch-32=@var{cpu} |
1262 | @itemx --with-arch-64=@var{cpu} | |
7816bea0 | 1263 | @itemx --with-tune=@var{cpu} |
8981c15b JM |
1264 | @itemx --with-tune-32=@var{cpu} |
1265 | @itemx --with-tune-64=@var{cpu} | |
7816bea0 | 1266 | @itemx --with-abi=@var{abi} |
9b66ebb1 | 1267 | @itemx --with-fpu=@var{type} |
7816bea0 DJ |
1268 | @itemx --with-float=@var{type} |
1269 | These configure options provide default values for the @option{-mschedule=}, | |
9b66ebb1 PB |
1270 | @option{-march=}, @option{-mtune=}, @option{-mabi=}, and @option{-mfpu=} |
1271 | options and for @option{-mhard-float} or @option{-msoft-float}. As with | |
1272 | @option{--with-cpu}, which switches will be accepted and acceptable values | |
1273 | of the arguments depend on the target. | |
f42974dc | 1274 | |
3cf94279 PB |
1275 | @item --with-mode=@var{mode} |
1276 | Specify if the compiler should default to @option{-marm} or @option{-mthumb}. | |
1277 | This option is only supported on ARM targets. | |
1278 | ||
feeeff5c JR |
1279 | @item --with-stack-offset=@var{num} |
1280 | This option sets the default for the -mstack-offset=@var{num} option, | |
1281 | and will thus generally also control the setting of this option for | |
1282 | libraries. This option is only supported on Epiphany targets. | |
1283 | ||
b71e5eba UB |
1284 | @item --with-fpmath=@var{isa} |
1285 | This options sets @option{-mfpmath=sse} by default and specifies the default | |
1286 | ISA for floating-point arithmetics. You can select either @samp{sse} which | |
1287 | enables @option{-msse2} or @samp{avx} which enables @option{-mavx} by default. | |
1288 | This option is only supported on i386 and x86-64 targets. | |
a3af5e26 | 1289 | |
050af144 MF |
1290 | @item --with-fp-32=@var{mode} |
1291 | On MIPS targets, set the default value for the @option{-mfp} option when using | |
1292 | the o32 ABI. The possibilities for @var{mode} are: | |
1293 | @table @code | |
1294 | @item 32 | |
1295 | Use the o32 FP32 ABI extension, as with the @option{-mfp32} command-line | |
1296 | option. | |
1297 | @item xx | |
1298 | Use the o32 FPXX ABI extension, as with the @option{-mfpxx} command-line | |
1299 | option. | |
1300 | @item 64 | |
1301 | Use the o32 FP64 ABI extension, as with the @option{-mfp64} command-line | |
1302 | option. | |
1303 | @end table | |
1304 | In the absence of this configuration option the default is to use the o32 | |
1305 | FP32 ABI extension. | |
1306 | ||
1307 | @item --with-odd-spreg-32 | |
1308 | On MIPS targets, set the @option{-modd-spreg} option by default when using | |
1309 | the o32 ABI. | |
1310 | ||
1311 | @item --without-odd-spreg-32 | |
1312 | On MIPS targets, set the @option{-mno-odd-spreg} option by default when using | |
1313 | the o32 ABI. This is normally used in conjunction with | |
1314 | @option{--with-fp-32=64} in order to target the o32 FP64A ABI extension. | |
1315 | ||
ff3f3951 MR |
1316 | @item --with-nan=@var{encoding} |
1317 | On MIPS targets, set the default encoding convention to use for the | |
1318 | special not-a-number (NaN) IEEE 754 floating-point data. The | |
1319 | possibilities for @var{encoding} are: | |
1320 | @table @code | |
1321 | @item legacy | |
1322 | Use the legacy encoding, as with the @option{-mnan=legacy} command-line | |
1323 | option. | |
1324 | @item 2008 | |
1325 | Use the 754-2008 encoding, as with the @option{-mnan=2008} command-line | |
1326 | option. | |
1327 | @end table | |
1328 | To use this configuration option you must have an assembler version | |
1329 | installed that supports the @option{-mnan=} command-line option too. | |
1330 | In the absence of this configuration option the default convention is | |
1331 | the legacy encoding, as when neither of the @option{-mnan=2008} and | |
1332 | @option{-mnan=legacy} command-line options has been used. | |
1333 | ||
9f0df97a DD |
1334 | @item --with-divide=@var{type} |
1335 | Specify how the compiler should generate code for checking for | |
1336 | division by zero. This option is only supported on the MIPS target. | |
1337 | The possibilities for @var{type} are: | |
1338 | @table @code | |
1339 | @item traps | |
1340 | Division by zero checks use conditional traps (this is the default on | |
1341 | systems that support conditional traps). | |
1342 | @item breaks | |
1343 | Division by zero checks use the break instruction. | |
1344 | @end table | |
1345 | ||
66471b47 DD |
1346 | @c If you make --with-llsc the default for additional targets, |
1347 | @c update the --with-llsc description in the MIPS section below. | |
1348 | ||
1349 | @item --with-llsc | |
1350 | On MIPS targets, make @option{-mllsc} the default when no | |
3805a93e | 1351 | @option{-mno-llsc} option is passed. This is the default for |
66471b47 DD |
1352 | Linux-based targets, as the kernel will emulate them if the ISA does |
1353 | not provide them. | |
1354 | ||
1355 | @item --without-llsc | |
1356 | On MIPS targets, make @option{-mno-llsc} the default when no | |
1357 | @option{-mllsc} option is passed. | |
1358 | ||
b96c5923 DD |
1359 | @item --with-synci |
1360 | On MIPS targets, make @option{-msynci} the default when no | |
1361 | @option{-mno-synci} option is passed. | |
1362 | ||
ff2ce160 | 1363 | @item --without-synci |
b96c5923 DD |
1364 | On MIPS targets, make @option{-mno-synci} the default when no |
1365 | @option{-msynci} option is passed. This is the default. | |
1366 | ||
ab6b44cb MF |
1367 | @item --with-lxc1-sxc1 |
1368 | On MIPS targets, make @option{-mlxc1-sxc1} the default when no | |
1369 | @option{-mno-lxc1-sxc1} option is passed. This is the default. | |
1370 | ||
1371 | @item --without-lxc1-sxc1 | |
1372 | On MIPS targets, make @option{-mno-lxc1-sxc1} the default when no | |
1373 | @option{-mlxc1-sxc1} option is passed. The indexed load/store | |
1374 | instructions are not directly a problem but can lead to unexpected | |
1375 | behaviour when deployed in an application intended for a 32-bit address | |
1376 | space but run on a 64-bit processor. The issue is seen because all | |
1377 | known MIPS 64-bit Linux kernels execute o32 and n32 applications | |
1378 | with 64-bit addressing enabled which affects the overflow behaviour | |
1379 | of the indexed addressing mode. GCC will assume that ordinary | |
1380 | 32-bit arithmetic overflow behaviour is the same whether performed | |
1381 | as an @code{addu} instruction or as part of the address calculation | |
1382 | in @code{lwxc1} type instructions. This assumption holds true in a | |
1383 | pure 32-bit environment and can hold true in a 64-bit environment if | |
1384 | the address space is accurately set to be 32-bit for o32 and n32. | |
1385 | ||
d821744c MF |
1386 | @item --with-madd4 |
1387 | On MIPS targets, make @option{-mmadd4} the default when no | |
1388 | @option{-mno-madd4} option is passed. This is the default. | |
1389 | ||
1390 | @item --without-madd4 | |
1391 | On MIPS targets, make @option{-mno-madd4} the default when no | |
1392 | @option{-mmadd4} option is passed. The @code{madd4} instruction | |
1393 | family can be problematic when targeting a combination of cores that | |
1394 | implement these instructions differently. There are two known cores | |
1395 | that implement these as fused operations instead of unfused (where | |
1396 | unfused is normally expected). Disabling these instructions is the | |
1397 | only way to ensure compatible code is generated; this will incur | |
1398 | a performance penalty. | |
1399 | ||
e21d5757 DJ |
1400 | @item --with-mips-plt |
1401 | On MIPS targets, make use of copy relocations and PLTs. | |
1402 | These features are extensions to the traditional | |
1403 | SVR4-based MIPS ABIs and require support from GNU binutils | |
1404 | and the runtime C library. | |
1405 | ||
354b7da5 DH |
1406 | @item --enable-__cxa_atexit |
1407 | Define if you want to use __cxa_atexit, rather than atexit, to | |
1408 | register C++ destructors for local statics and global objects. | |
1409 | This is essential for fully standards-compliant handling of | |
8a36672b JM |
1410 | destructors, but requires __cxa_atexit in libc. This option is currently |
1411 | only available on systems with GNU libc. When enabled, this will cause | |
cea79118 | 1412 | @option{-fuse-cxa-atexit} to be passed by default. |
354b7da5 | 1413 | |
d1a6ec10 | 1414 | @item --enable-gnu-indirect-function |
f6c5fbfd NS |
1415 | Define if you want to enable the @code{ifunc} attribute. This option is |
1416 | currently only available on systems with GNU libc on certain targets. | |
1417 | ||
ef88b07d JM |
1418 | @item --enable-target-optspace |
1419 | Specify that target | |
38209993 LG |
1420 | libraries should be optimized for code space instead of code speed. |
1421 | This is the default for the m32r platform. | |
f42974dc | 1422 | |
ab130aa5 JM |
1423 | @item --with-cpp-install-dir=@var{dirname} |
1424 | Specify that the user visible @command{cpp} program should be installed | |
1425 | in @file{@var{prefix}/@var{dirname}/cpp}, in addition to @var{bindir}. | |
f42974dc | 1426 | |
55c4f715 RO |
1427 | @item --enable-comdat |
1428 | Enable COMDAT group support. This is primarily used to override the | |
1429 | automatically detected value. | |
1430 | ||
07cf4226 DM |
1431 | @item --enable-initfini-array |
1432 | Force the use of sections @code{.init_array} and @code{.fini_array} | |
1433 | (instead of @code{.init} and @code{.fini}) for constructors and | |
1434 | destructors. Option @option{--disable-initfini-array} has the | |
1435 | opposite effect. If neither option is specified, the configure script | |
1436 | will try to guess whether the @code{.init_array} and | |
1437 | @code{.fini_array} sections are supported and, if they are, use them. | |
1438 | ||
427b248d JM |
1439 | @item --enable-link-mutex |
1440 | When building GCC, use a mutex to avoid linking the compilers for | |
1441 | multiple languages at the same time, to avoid thrashing on build | |
1442 | systems with limited free memory. The default is not to use such a mutex. | |
1443 | ||
ef88b07d | 1444 | @item --enable-maintainer-mode |
0b70519f RW |
1445 | The build rules that regenerate the Autoconf and Automake output files as |
1446 | well as the GCC master message catalog @file{gcc.pot} are normally | |
767094dd JM |
1447 | disabled. This is because it can only be rebuilt if the complete source |
1448 | tree is present. If you have changed the sources and want to rebuild the | |
6ac48571 | 1449 | catalog, configuring with @option{--enable-maintainer-mode} will enable |
767094dd | 1450 | this. Note that you need a recent version of the @code{gettext} tools |
6ac48571 JM |
1451 | to do so. |
1452 | ||
f5c3bb4b PB |
1453 | @item --disable-bootstrap |
1454 | For a native build, the default configuration is to perform | |
1455 | a 3-stage bootstrap of the compiler when @samp{make} is invoked, | |
1456 | testing that GCC can compile itself correctly. If you want to disable | |
1457 | this process, you can configure with @option{--disable-bootstrap}. | |
1458 | ||
1459 | @item --enable-bootstrap | |
1460 | In special cases, you may want to perform a 3-stage build | |
1461 | even if the target and host triplets are different. | |
0b70519f | 1462 | This is possible when the host can run code compiled for |
f5c3bb4b PB |
1463 | the target (e.g.@: host is i686-linux, target is i486-linux). |
1464 | Starting from GCC 4.2, to do this you have to configure explicitly | |
1465 | with @option{--enable-bootstrap}. | |
1466 | ||
51b9ff45 | 1467 | @item --enable-generated-files-in-srcdir |
80521187 | 1468 | Neither the .c and .h files that are generated from Bison and flex nor the |
51b9ff45 | 1469 | info manuals and man pages that are built from the .texi files are present |
80521187 GP |
1470 | in the SVN development tree. When building GCC from that development tree, |
1471 | or from one of our snapshots, those generated files are placed in your | |
1472 | build directory, which allows for the source to be in a readonly | |
1473 | directory. | |
51b9ff45 KC |
1474 | |
1475 | If you configure with @option{--enable-generated-files-in-srcdir} then those | |
1476 | generated files will go into the source directory. This is mainly intended | |
1477 | for generating release or prerelease tarballs of the GCC sources, since it | |
80521187 GP |
1478 | is not a requirement that the users of source releases to have flex, Bison, |
1479 | or makeinfo. | |
51b9ff45 | 1480 | |
ef88b07d JM |
1481 | @item --enable-version-specific-runtime-libs |
1482 | Specify | |
38209993 | 1483 | that runtime libraries should be installed in the compiler specific |
8e5f33ff GK |
1484 | subdirectory (@file{@var{libdir}/gcc}) rather than the usual places. In |
1485 | addition, @samp{libstdc++}'s include files will be installed into | |
1486 | @file{@var{libdir}} unless you overruled it by using | |
6cfb3f16 | 1487 | @option{--with-gxx-include-dir=@var{dirname}}. Using this option is |
38209993 | 1488 | particularly useful if you intend to use several versions of GCC in |
8a36672b | 1489 | parallel. This is currently supported by @samp{libgfortran}, |
97a2feb6 | 1490 | @samp{libstdc++}, and @samp{libobjc}. |
b9034bbd | 1491 | |
dd913323 MH |
1492 | @item @anchor{WithAixSoname}--with-aix-soname=@samp{aix}, @samp{svr4} or @samp{both} |
1493 | Traditional AIX shared library versioning (versioned @code{Shared Object} | |
1494 | files as members of unversioned @code{Archive Library} files named | |
1495 | @samp{lib.a}) causes numerous headaches for package managers. However, | |
1496 | @code{Import Files} as members of @code{Archive Library} files allow for | |
1497 | @strong{filename-based versioning} of shared libraries as seen on Linux/SVR4, | |
1498 | where this is called the "SONAME". But as they prevent static linking, | |
1499 | @code{Import Files} may be used with @code{Runtime Linking} only, where the | |
1500 | linker does search for @samp{libNAME.so} before @samp{libNAME.a} library | |
1501 | filenames with the @samp{-lNAME} linker flag. | |
1502 | ||
1503 | @anchor{AixLdCommand}For detailed information please refer to the AIX | |
7d437dc1 | 1504 | @uref{https://www.ibm.com/support/knowledgecenter/search/%22the%20ld%20command%2C%20also%20called%20the%20linkage%20editor%20or%20binder%22,,ld |
dd913323 MH |
1505 | Command} reference. |
1506 | ||
1507 | As long as shared library creation is enabled, upon: | |
1508 | @table @code | |
1509 | @item --with-aix-soname=aix | |
1510 | @item --with-aix-soname=both | |
1511 | A (traditional AIX) @code{Shared Archive Library} file is created: | |
1512 | @itemize @bullet | |
1513 | @item using the @samp{libNAME.a} filename scheme | |
1514 | @item with the @code{Shared Object} file as archive member named | |
1515 | @samp{libNAME.so.V} (except for @samp{libgcc_s}, where the @code{Shared | |
1516 | Object} file is named @samp{shr.o} for backwards compatibility), which | |
1517 | @itemize @minus | |
1518 | @item is used for runtime loading from inside the @samp{libNAME.a} file | |
1519 | @item is used for dynamic loading via | |
1520 | @code{dlopen("libNAME.a(libNAME.so.V)", RTLD_MEMBER)} | |
1521 | @item is used for shared linking | |
1522 | @item is used for static linking, so no separate @code{Static Archive | |
1523 | Library} file is needed | |
1524 | @end itemize | |
1525 | @end itemize | |
1526 | @item --with-aix-soname=both | |
1527 | @item --with-aix-soname=svr4 | |
1528 | A (second) @code{Shared Archive Library} file is created: | |
1529 | @itemize @bullet | |
1530 | @item using the @samp{libNAME.so.V} filename scheme | |
1531 | @item with the @code{Shared Object} file as archive member named | |
1532 | @samp{shr.o}, which | |
1533 | @itemize @minus | |
1534 | @item is created with the @code{-G linker flag} | |
1535 | @item has the @code{F_LOADONLY} flag set | |
1536 | @item is used for runtime loading from inside the @samp{libNAME.so.V} file | |
1537 | @item is used for dynamic loading via @code{dlopen("libNAME.so.V(shr.o)", | |
1538 | RTLD_MEMBER)} | |
1539 | @end itemize | |
1540 | @item with the @code{Import File} as archive member named @samp{shr.imp}, | |
1541 | which | |
1542 | @itemize @minus | |
1543 | @item refers to @samp{libNAME.so.V(shr.o)} as the "SONAME", to be recorded | |
1544 | in the @code{Loader Section} of subsequent binaries | |
1545 | @item indicates whether @samp{libNAME.so.V(shr.o)} is 32 or 64 bit | |
1546 | @item lists all the public symbols exported by @samp{lib.so.V(shr.o)}, | |
1547 | eventually decorated with the @code{@samp{weak} Keyword} | |
1548 | @item is necessary for shared linking against @samp{lib.so.V(shr.o)} | |
1549 | @end itemize | |
1550 | @end itemize | |
1551 | A symbolic link using the @samp{libNAME.so} filename scheme is created: | |
1552 | @itemize @bullet | |
1553 | @item pointing to the @samp{libNAME.so.V} @code{Shared Archive Library} file | |
1554 | @item to permit the @code{ld Command} to find @samp{lib.so.V(shr.imp)} via | |
1555 | the @samp{-lNAME} argument (requires @code{Runtime Linking} to be enabled) | |
1556 | @item to permit dynamic loading of @samp{lib.so.V(shr.o)} without the need | |
1557 | to specify the version number via @code{dlopen("libNAME.so(shr.o)", | |
1558 | RTLD_MEMBER)} | |
1559 | @end itemize | |
1560 | @end table | |
1561 | ||
1562 | As long as static library creation is enabled, upon: | |
1563 | @table @code | |
1564 | @item --with-aix-soname=svr4 | |
1565 | A @code{Static Archive Library} is created: | |
1566 | @itemize @bullet | |
1567 | @item using the @samp{libNAME.a} filename scheme | |
1568 | @item with all the @code{Static Object} files as archive members, which | |
1569 | @itemize @minus | |
1570 | @item are used for static linking | |
1571 | @end itemize | |
1572 | @end itemize | |
1573 | @end table | |
1574 | ||
1575 | While the aix-soname=@samp{svr4} option does not create @code{Shared Object} | |
1576 | files as members of unversioned @code{Archive Library} files any more, package | |
1577 | managers still are responsible to | |
1578 | @uref{./specific.html#TransferAixShobj,,transfer} @code{Shared Object} files | |
1579 | found as member of a previously installed unversioned @code{Archive Library} | |
1580 | file into the newly installed @code{Archive Library} file with the same | |
1581 | filename. | |
1582 | ||
1583 | @emph{WARNING:} Creating @code{Shared Object} files with @code{Runtime Linking} | |
1584 | enabled may bloat the TOC, eventually leading to @code{TOC overflow} errors, | |
1585 | requiring the use of either the @option{-Wl,-bbigtoc} linker flag (seen to | |
1586 | break with the @code{GDB} debugger) or some of the TOC-related compiler flags, | |
1587 | @ifnothtml | |
1588 | @xref{RS/6000 and PowerPC Options,, RS/6000 and PowerPC Options, gcc, | |
1589 | Using the GNU Compiler Collection (GCC)}. | |
1590 | @end ifnothtml | |
1591 | @ifhtml | |
1592 | see ``RS/6000 and PowerPC Options'' in the main manual. | |
1593 | @end ifhtml | |
1594 | ||
1595 | @option{--with-aix-soname} is currently supported by @samp{libgcc_s} only, so | |
1596 | this option is still experimental and not for normal use yet. | |
1597 | ||
9c582551 | 1598 | Default is the traditional behavior @option{--with-aix-soname=@samp{aix}}. |
dd913323 | 1599 | |
ef88b07d JM |
1600 | @item --enable-languages=@var{lang1},@var{lang2},@dots{} |
1601 | Specify that only a particular subset of compilers and | |
767094dd | 1602 | their runtime libraries should be built. For a list of valid values for |
6cfb3f16 | 1603 | @var{langN} you can issue the following command in the |
eea81d3e | 1604 | @file{gcc} directory of your GCC source tree:@* |
3ab51846 | 1605 | @smallexample |
6fedd529 | 1606 | grep ^language= */config-lang.in |
3ab51846 | 1607 | @end smallexample |
eea81d3e | 1608 | Currently, you can use any of the following: |
cdfee50a | 1609 | @code{all}, @code{default}, @code{ada}, @code{c}, @code{c++}, @code{fortran}, |
97a2feb6 | 1610 | @code{go}, @code{jit}, @code{lto}, @code{objc}, @code{obj-c++}. |
f995c51f | 1611 | Building the Ada compiler has special requirements, see below. |
cdfee50a | 1612 | If you do not pass this flag, or specify the option @code{default}, then the |
f995c51f | 1613 | default languages available in the @file{gcc} sub-tree will be configured. |
6fedd529 JW |
1614 | Ada, Go, Jit, and Objective-C++ are not default languages. LTO is not a |
1615 | default language, but is built by default because @option{--enable-lto} is | |
cdfee50a NS |
1616 | enabled by default. The other languages are default languages. If |
1617 | @code{all} is specified, then all available languages are built. An | |
1618 | exception is @code{jit} language, which requires | |
1619 | @option{--enable-host-shared} to be included with @code{all}. | |
f42974dc | 1620 | |
80ca80e9 BM |
1621 | @item --enable-stage1-languages=@var{lang1},@var{lang2},@dots{} |
1622 | Specify that a particular subset of compilers and their runtime | |
1623 | libraries should be built with the system C compiler during stage 1 of | |
1624 | the bootstrap process, rather than only in later stages with the | |
1625 | bootstrapped C compiler. The list of valid values is the same as for | |
1626 | @option{--enable-languages}, and the option @code{all} will select all | |
1627 | of the languages enabled by @option{--enable-languages}. This option is | |
1628 | primarily useful for GCC development; for instance, when a development | |
1629 | version of the compiler cannot bootstrap due to compiler bugs, or when | |
1630 | one is debugging front ends other than the C front end. When this | |
1631 | option is used, one can then build the target libraries for the | |
1632 | specified languages with the stage-1 compiler by using @command{make | |
1633 | stage1-bubble all-target}, or run the testsuite on the stage-1 compiler | |
1634 | for the specified languages using @command{make stage1-start check-gcc}. | |
1635 | ||
cd271054 AC |
1636 | @item --disable-libada |
1637 | Specify that the run-time libraries and tools used by GNAT should not | |
1638 | be built. This can be useful for debugging, or for compatibility with | |
c2910edf | 1639 | previous Ada build procedures, when it was required to explicitly |
cd271054 AC |
1640 | do a @samp{make -C gcc gnatlib_and_tools}. |
1641 | ||
6a929205 MT |
1642 | @item --disable-libsanitizer |
1643 | Specify that the run-time libraries for the various sanitizers should | |
1644 | not be built. | |
1645 | ||
ef0087a7 KH |
1646 | @item --disable-libssp |
1647 | Specify that the run-time libraries for stack smashing protection | |
78fd4c51 SL |
1648 | should not be built or linked against. On many targets library support |
1649 | is provided by the C library instead. | |
ef0087a7 | 1650 | |
87e6d9dc TB |
1651 | @item --disable-libquadmath |
1652 | Specify that the GCC quad-precision math library should not be built. | |
1653 | On some systems, the library is required to be linkable when building | |
1654 | the Fortran front end, unless @option{--disable-libquadmath-support} | |
1655 | is used. | |
1656 | ||
1657 | @item --disable-libquadmath-support | |
1658 | Specify that the Fortran front end and @code{libgfortran} do not add | |
1659 | support for @code{libquadmath} on systems supporting it. | |
1660 | ||
4fe7a8bc | 1661 | @item --disable-libgomp |
f1f3453e TS |
1662 | Specify that the GNU Offloading and Multi Processing Runtime Library |
1663 | should not be built. | |
4fe7a8bc | 1664 | |
87f3fea8 CT |
1665 | @item --disable-libvtv |
1666 | Specify that the run-time libraries used by vtable verification | |
1667 | should not be built. | |
1668 | ||
ef88b07d JM |
1669 | @item --with-dwarf2 |
1670 | Specify that the compiler should | |
eea81d3e | 1671 | use DWARF 2 debugging information as the default. |
f85b8d1a | 1672 | |
5123acd2 MM |
1673 | @item --with-advance-toolchain=@var{at} |
1674 | On 64-bit PowerPC Linux systems, configure the compiler to use the | |
1675 | header files, library files, and the dynamic linker from the Advance | |
1676 | Toolchain release @var{at} instead of the default versions that are | |
1677 | provided by the Linux distribution. In general, this option is | |
1678 | intended for the developers of GCC, and it is not intended for general | |
1679 | use. | |
1680 | ||
7f970b70 AM |
1681 | @item --enable-targets=all |
1682 | @itemx --enable-targets=@var{target_list} | |
1683 | Some GCC targets, e.g.@: powerpc64-linux, build bi-arch compilers. | |
1684 | These are compilers that are able to generate either 64-bit or 32-bit | |
8ab5f5c9 | 1685 | code. Typically, the corresponding 32-bit target, e.g.@: |
7f970b70 AM |
1686 | powerpc-linux for powerpc64-linux, only generates 32-bit code. This |
1687 | option enables the 32-bit target to be a bi-arch compiler, which is | |
1688 | useful when you want a bi-arch compiler that defaults to 32-bit, and | |
1689 | you are building a bi-arch or multi-arch binutils in a combined tree. | |
34677bae MK |
1690 | On mips-linux, this will build a tri-arch compiler (ABI o32/n32/64), |
1691 | defaulted to o32. | |
f3054223 AL |
1692 | Currently, this option only affects sparc-linux, powerpc-linux, x86-linux, |
1693 | mips-linux and s390-linux. | |
7f970b70 | 1694 | |
428b3812 L |
1695 | @item --enable-default-pie |
1696 | Turn on @option{-fPIE} and @option{-pie} by default. | |
1697 | ||
7f970b70 AM |
1698 | @item --enable-secureplt |
1699 | This option enables @option{-msecure-plt} by default for powerpc-linux. | |
1700 | @ifnothtml | |
1701 | @xref{RS/6000 and PowerPC Options,, RS/6000 and PowerPC Options, gcc, | |
1702 | Using the GNU Compiler Collection (GCC)}, | |
1703 | @end ifnothtml | |
1704 | @ifhtml | |
1705 | See ``RS/6000 and PowerPC Options'' in the main manual | |
1706 | @end ifhtml | |
1707 | ||
e0f6cba0 MG |
1708 | @item --enable-default-ssp |
1709 | Turn on @option{-fstack-protector-strong} by default. | |
1710 | ||
922e3e33 UB |
1711 | @item --enable-cld |
1712 | This option enables @option{-mcld} by default for 32-bit x86 targets. | |
1713 | @ifnothtml | |
1714 | @xref{i386 and x86-64 Options,, i386 and x86-64 Options, gcc, | |
1715 | Using the GNU Compiler Collection (GCC)}, | |
1716 | @end ifnothtml | |
1717 | @ifhtml | |
1718 | See ``i386 and x86-64 Options'' in the main manual | |
1719 | @end ifhtml | |
1720 | ||
f85b8d1a | 1721 | @item --enable-win32-registry |
eea81d3e | 1722 | @itemx --enable-win32-registry=@var{key} |
f85b8d1a | 1723 | @itemx --disable-win32-registry |
95fef11f | 1724 | The @option{--enable-win32-registry} option enables Microsoft Windows-hosted GCC |
f85b8d1a JM |
1725 | to look up installations paths in the registry using the following key: |
1726 | ||
1727 | @smallexample | |
eea81d3e | 1728 | @code{HKEY_LOCAL_MACHINE\SOFTWARE\Free Software Foundation\@var{key}} |
f85b8d1a JM |
1729 | @end smallexample |
1730 | ||
eea81d3e | 1731 | @var{key} defaults to GCC version number, and can be overridden by the |
8a36672b | 1732 | @option{--enable-win32-registry=@var{key}} option. Vendors and distributors |
f85b8d1a JM |
1733 | who use custom installers are encouraged to provide a different key, |
1734 | perhaps one comprised of vendor name and GCC version number, to | |
767094dd | 1735 | avoid conflict with existing installations. This feature is enabled |
6cfb3f16 | 1736 | by default, and can be disabled by @option{--disable-win32-registry} |
f85b8d1a JM |
1737 | option. This option has no effect on the other hosts. |
1738 | ||
1739 | @item --nfp | |
1740 | Specify that the machine does not have a floating point unit. This | |
c9693e96 LH |
1741 | option only applies to @samp{m68k-sun-sunos@var{n}}. On any other |
1742 | system, @option{--nfp} has no effect. | |
f85b8d1a | 1743 | |
dd859b8a KG |
1744 | @item --enable-werror |
1745 | @itemx --disable-werror | |
1746 | @itemx --enable-werror=yes | |
1747 | @itemx --enable-werror=no | |
1748 | When you specify this option, it controls whether certain files in the | |
1749 | compiler are built with @option{-Werror} in bootstrap stage2 and later. | |
1750 | If you don't specify it, @option{-Werror} is turned on for the main | |
1751 | development trunk. However it defaults to off for release branches and | |
1752 | final releases. The specific files which get @option{-Werror} are | |
1753 | controlled by the Makefiles. | |
1754 | ||
f85b8d1a JM |
1755 | @item --enable-checking |
1756 | @itemx --enable-checking=@var{list} | |
cdce5c16 | 1757 | When you specify this option, the compiler is built to perform internal |
e5080aa6 | 1758 | consistency checks of the requested complexity. This does not change the |
cdce5c16 NS |
1759 | generated code, but adds error checking within the compiler. This will |
1760 | slow down the compiler and may only work properly if you are building | |
7db11a5a | 1761 | the compiler with GCC@. This is @samp{yes,extra} by default when building |
00f39bd5 RG |
1762 | from SVN or snapshots, but @samp{release} for releases. The default |
1763 | for building the stage1 compiler is @samp{yes}. More control | |
cdce5c16 NS |
1764 | over the checks may be had by specifying @var{list}. The categories of |
1765 | checks available are @samp{yes} (most common checks | |
1766 | @samp{assert,misc,tree,gc,rtlflag,runtime}), @samp{no} (no checks at | |
1767 | all), @samp{all} (all but @samp{valgrind}), @samp{release} (cheapest | |
1768 | checks @samp{assert,runtime}) or @samp{none} (same as @samp{no}). | |
1769 | Individual checks can be enabled with these flags @samp{assert}, | |
7db11a5a JJ |
1770 | @samp{df}, @samp{fold}, @samp{gc}, @samp{gcac}, @samp{misc}, @samp{rtl}, |
1771 | @samp{rtlflag}, @samp{runtime}, @samp{tree}, @samp{extra} and @samp{valgrind}. | |
1772 | @samp{extra} adds for @samp{misc} checking extra checks that might affect | |
1773 | code generation and should therefore not differ between stage1 and later | |
1774 | stages. | |
cdce5c16 NS |
1775 | |
1776 | The @samp{valgrind} check requires the external @command{valgrind} | |
ccf548a7 | 1777 | simulator, available from @uref{http://valgrind.org/}. The |
604f825c | 1778 | @samp{df}, @samp{rtl}, @samp{gcac} and @samp{valgrind} checks are very expensive. |
cdce5c16 NS |
1779 | To disable all checking, @samp{--disable-checking} or |
1780 | @samp{--enable-checking=none} must be explicitly requested. Disabling | |
1781 | assertions will make the compiler and runtime slightly faster but | |
1782 | increase the risk of undetected internal errors causing wrong code to be | |
1783 | generated. | |
f85b8d1a | 1784 | |
00f39bd5 | 1785 | @item --disable-stage1-checking |
1588fb31 | 1786 | @itemx --enable-stage1-checking |
00f39bd5 RG |
1787 | @itemx --enable-stage1-checking=@var{list} |
1788 | If no @option{--enable-checking} option is specified the stage1 | |
1789 | compiler will be built with @samp{yes} checking enabled, otherwise | |
1790 | the stage1 checking flags are the same as specified by | |
1791 | @option{--enable-checking}. To build the stage1 compiler with | |
1792 | different checking options use @option{--enable-stage1-checking}. | |
1793 | The list of checking options is the same as for @option{--enable-checking}. | |
1794 | If your system is too slow or too small to bootstrap a released compiler | |
1795 | with checking for stage1 enabled, you can use @samp{--disable-stage1-checking} | |
1796 | to disable checking for the stage1 compiler. | |
1797 | ||
22aa533e | 1798 | @item --enable-coverage |
31775d31 | 1799 | @itemx --enable-coverage=@var{level} |
22aa533e | 1800 | With this option, the compiler is built to collect self coverage |
8a36672b JM |
1801 | information, every time it is run. This is for internal development |
1802 | purposes, and only works when the compiler is being built with gcc. The | |
22aa533e | 1803 | @var{level} argument controls whether the compiler is built optimized or |
8a36672b | 1804 | not, values are @samp{opt} and @samp{noopt}. For coverage analysis you |
22aa533e | 1805 | want to disable optimization, for performance analysis you want to |
8a36672b | 1806 | enable optimization. When coverage is enabled, the default level is |
22aa533e NS |
1807 | without optimization. |
1808 | ||
439a7e54 | 1809 | @item --enable-gather-detailed-mem-stats |
95ea367d | 1810 | When this option is specified more detailed information on memory |
439a7e54 | 1811 | allocation is gathered. This information is printed when using |
daf2f129 | 1812 | @option{-fmem-report}. |
439a7e54 | 1813 | |
fb107ea1 MT |
1814 | @item --enable-valgrind-annotations |
1815 | Mark selected memory related operations in the compiler when run under | |
1816 | valgrind to suppress false positives. | |
1817 | ||
f85b8d1a JM |
1818 | @item --enable-nls |
1819 | @itemx --disable-nls | |
6cfb3f16 | 1820 | The @option{--enable-nls} option enables Native Language Support (NLS), |
f85b8d1a | 1821 | which lets GCC output diagnostics in languages other than American |
767094dd | 1822 | English. Native Language Support is enabled by default if not doing a |
161d7b59 | 1823 | canadian cross build. The @option{--disable-nls} option disables NLS@. |
f85b8d1a JM |
1824 | |
1825 | @item --with-included-gettext | |
c771326b | 1826 | If NLS is enabled, the @option{--with-included-gettext} option causes the build |
021c4bfd | 1827 | procedure to prefer its copy of GNU @command{gettext}. |
f85b8d1a JM |
1828 | |
1829 | @item --with-catgets | |
1830 | If NLS is enabled, and if the host lacks @code{gettext} but has the | |
1831 | inferior @code{catgets} interface, the GCC build procedure normally | |
1832 | ignores @code{catgets} and instead uses GCC's copy of the GNU | |
6cfb3f16 | 1833 | @code{gettext} library. The @option{--with-catgets} option causes the |
f85b8d1a | 1834 | build procedure to use the host's @code{catgets} in this situation. |
80f9249a | 1835 | |
5304400d CR |
1836 | @item --with-libiconv-prefix=@var{dir} |
1837 | Search for libiconv header files in @file{@var{dir}/include} and | |
1838 | libiconv library files in @file{@var{dir}/lib}. | |
1839 | ||
9340544b ZW |
1840 | @item --enable-obsolete |
1841 | Enable configuration for an obsoleted system. If you attempt to | |
1842 | configure GCC for a system (build, host, or target) which has been | |
1843 | obsoleted, and you do not specify this flag, configure will halt with an | |
1844 | error message. | |
1845 | ||
1846 | All support for systems which have been obsoleted in one release of GCC | |
1847 | is removed entirely in the next major release, unless someone steps | |
1848 | forward to maintain the port. | |
486aa804 BE |
1849 | |
1850 | @item --enable-decimal-float | |
79b87c74 MM |
1851 | @itemx --enable-decimal-float=yes |
1852 | @itemx --enable-decimal-float=no | |
1853 | @itemx --enable-decimal-float=bid | |
1854 | @itemx --enable-decimal-float=dpd | |
486aa804 | 1855 | @itemx --disable-decimal-float |
79b87c74 | 1856 | Enable (or disable) support for the C decimal floating point extension |
7292b8e4 BE |
1857 | that is in the IEEE 754-2008 standard. This is enabled by default only |
1858 | on PowerPC, i386, and x86_64 GNU/Linux systems. Other systems may also | |
1859 | support it, but require the user to specifically enable it. You can | |
1860 | optionally control which decimal floating point format is used (either | |
1861 | @samp{bid} or @samp{dpd}). The @samp{bid} (binary integer decimal) | |
1862 | format is default on i386 and x86_64 systems, and the @samp{dpd} | |
1863 | (densely packed decimal) format is default on PowerPC systems. | |
486aa804 | 1864 | |
ab22c1fa CF |
1865 | @item --enable-fixed-point |
1866 | @itemx --disable-fixed-point | |
1867 | Enable (or disable) support for C fixed-point arithmetic. | |
1868 | This option is enabled by default for some targets (such as MIPS) which | |
1869 | have hardware-support for fixed-point operations. On other targets, you | |
1870 | may enable this option manually. | |
1871 | ||
ed965309 JJ |
1872 | @item --with-long-double-128 |
1873 | Specify if @code{long double} type should be 128-bit by default on selected | |
1874 | GNU/Linux architectures. If using @code{--without-long-double-128}, | |
1875 | @code{long double} will be by default 64-bit, the same as @code{double} type. | |
1876 | When neither of these configure options are used, the default will be | |
1877 | 128-bit @code{long double} when built against GNU C Library 2.4 and later, | |
1878 | 64-bit @code{long double} otherwise. | |
1879 | ||
1e44e857 DJ |
1880 | @item --enable-fdpic |
1881 | On SH Linux systems, generate ELF FDPIC code. | |
1882 | ||
8a877c9c KG |
1883 | @item --with-gmp=@var{pathname} |
1884 | @itemx --with-gmp-include=@var{pathname} | |
1885 | @itemx --with-gmp-lib=@var{pathname} | |
1886 | @itemx --with-mpfr=@var{pathname} | |
1887 | @itemx --with-mpfr-include=@var{pathname} | |
1888 | @itemx --with-mpfr-lib=@var{pathname} | |
f9bab007 KG |
1889 | @itemx --with-mpc=@var{pathname} |
1890 | @itemx --with-mpc-include=@var{pathname} | |
1891 | @itemx --with-mpc-lib=@var{pathname} | |
7a07ae52 | 1892 | If you want to build GCC but do not have the GMP library, the MPFR |
f9bab007 | 1893 | library and/or the MPC library installed in a standard location and |
7a07ae52 JW |
1894 | do not have their sources present in the GCC source tree then you |
1895 | can explicitly specify the directory where they are installed | |
1896 | (@samp{--with-gmp=@var{gmpinstalldir}}, | |
b7ae9eb5 RW |
1897 | @samp{--with-mpfr=@/@var{mpfrinstalldir}}, |
1898 | @samp{--with-mpc=@/@var{mpcinstalldir}}). The | |
1899 | @option{--with-gmp=@/@var{gmpinstalldir}} option is shorthand for | |
1900 | @option{--with-gmp-lib=@/@var{gmpinstalldir}/lib} and | |
1901 | @option{--with-gmp-include=@/@var{gmpinstalldir}/include}. Likewise the | |
1902 | @option{--with-mpfr=@/@var{mpfrinstalldir}} option is shorthand for | |
1903 | @option{--with-mpfr-lib=@/@var{mpfrinstalldir}/lib} and | |
1904 | @option{--with-mpfr-include=@/@var{mpfrinstalldir}/include}, also the | |
1905 | @option{--with-mpc=@/@var{mpcinstalldir}} option is shorthand for | |
1906 | @option{--with-mpc-lib=@/@var{mpcinstalldir}/lib} and | |
1907 | @option{--with-mpc-include=@/@var{mpcinstalldir}/include}. If these | |
3aea2d1c | 1908 | shorthand assumptions are not correct, you can use the explicit |
abcc9b2a JW |
1909 | include and lib options directly. You might also need to ensure the |
1910 | shared libraries can be found by the dynamic linker when building and | |
1911 | using GCC, for example by setting the runtime shared library path | |
1912 | variable (@env{LD_LIBRARY_PATH} on GNU/Linux and Solaris systems). | |
3aea2d1c | 1913 | |
29a63921 AO |
1914 | These flags are applicable to the host platform only. When building |
1915 | a cross compiler, they will not be used to configure target libraries. | |
1916 | ||
6f22445a RB |
1917 | @item --with-isl=@var{pathname} |
1918 | @itemx --with-isl-include=@var{pathname} | |
1919 | @itemx --with-isl-lib=@var{pathname} | |
e357a5e0 | 1920 | If you do not have the isl library installed in a standard location and you |
8495b8f6 FXC |
1921 | want to build GCC, you can explicitly specify the directory where it is |
1922 | installed (@samp{--with-isl=@/@var{islinstalldir}}). The | |
33ad93b9 RG |
1923 | @option{--with-isl=@/@var{islinstalldir}} option is shorthand for |
1924 | @option{--with-isl-lib=@/@var{islinstalldir}/lib} and | |
8495b8f6 FXC |
1925 | @option{--with-isl-include=@/@var{islinstalldir}/include}. If this |
1926 | shorthand assumption is not correct, you can use the explicit | |
8a877c9c KG |
1927 | include and lib options directly. |
1928 | ||
29a63921 AO |
1929 | These flags are applicable to the host platform only. When building |
1930 | a cross compiler, they will not be used to configure target libraries. | |
1931 | ||
00020c16 ILT |
1932 | @item --with-stage1-ldflags=@var{flags} |
1933 | This option may be used to set linker flags to be used when linking | |
1934 | stage 1 of GCC. These are also used when linking GCC if configured with | |
0682ab79 | 1935 | @option{--disable-bootstrap}. If @option{--with-stage1-libs} is not set to a |
5dc85f7e TV |
1936 | value, then the default is @samp{-static-libstdc++ -static-libgcc}, if |
1937 | supported. | |
00020c16 ILT |
1938 | |
1939 | @item --with-stage1-libs=@var{libs} | |
1940 | This option may be used to set libraries to be used when linking stage 1 | |
1941 | of GCC. These are also used when linking GCC if configured with | |
5dc85f7e | 1942 | @option{--disable-bootstrap}. |
00020c16 ILT |
1943 | |
1944 | @item --with-boot-ldflags=@var{flags} | |
1945 | This option may be used to set linker flags to be used when linking | |
5dc85f7e TV |
1946 | stage 2 and later when bootstrapping GCC. If --with-boot-libs |
1947 | is not is set to a value, then the default is | |
bec93d73 | 1948 | @samp{-static-libstdc++ -static-libgcc}. |
00020c16 ILT |
1949 | |
1950 | @item --with-boot-libs=@var{libs} | |
1951 | This option may be used to set libraries to be used when linking stage 2 | |
5dc85f7e | 1952 | and later when bootstrapping GCC. |
00020c16 | 1953 | |
c8aea42c PB |
1954 | @item --with-debug-prefix-map=@var{map} |
1955 | Convert source directory names using @option{-fdebug-prefix-map} when | |
1956 | building runtime libraries. @samp{@var{map}} is a space-separated | |
1957 | list of maps of the form @samp{@var{old}=@var{new}}. | |
1958 | ||
3b0249cb ILT |
1959 | @item --enable-linker-build-id |
1960 | Tells GCC to pass @option{--build-id} option to the linker for all final | |
1961 | links (links performed without the @option{-r} or @option{--relocatable} | |
1962 | option), if the linker supports it. If you specify | |
1963 | @option{--enable-linker-build-id}, but your linker does not | |
1964 | support @option{--build-id} option, a warning is issued and the | |
1965 | @option{--enable-linker-build-id} option is ignored. The default is off. | |
1966 | ||
79bec923 ST |
1967 | @item --with-linker-hash-style=@var{choice} |
1968 | Tells GCC to pass @option{--hash-style=@var{choice}} option to the | |
1969 | linker for all final links. @var{choice} can be one of | |
1970 | @samp{sysv}, @samp{gnu}, and @samp{both} where @samp{sysv} is the default. | |
1971 | ||
e31bcd1b JM |
1972 | @item --enable-gnu-unique-object |
1973 | @itemx --disable-gnu-unique-object | |
1974 | Tells GCC to use the gnu_unique_object relocation for C++ template | |
1975 | static data members and inline function local statics. Enabled by | |
75a2bcc0 | 1976 | default for a toolchain with an assembler that accepts it and |
e31bcd1b JM |
1977 | GLIBC 2.11 or above, otherwise disabled. |
1978 | ||
b907149b JJ |
1979 | @item --with-diagnostics-color=@var{choice} |
1980 | Tells GCC to use @var{choice} as the default for @option{-fdiagnostics-color=} | |
1981 | option (if not used explicitly on the command line). @var{choice} | |
1982 | can be one of @samp{never}, @samp{auto}, @samp{always}, and @samp{auto-if-env} | |
1983 | where @samp{auto} is the default. @samp{auto-if-env} means that | |
1984 | @option{-fdiagnostics-color=auto} will be the default if @code{GCC_COLORS} | |
1985 | is present and non-empty in the environment, and | |
1986 | @option{-fdiagnostics-color=never} otherwise. | |
1987 | ||
2d413304 | 1988 | @item --enable-lto |
48215350 | 1989 | @itemx --disable-lto |
2d413304 | 1990 | Enable support for link-time optimization (LTO). This is enabled by |
48215350 | 1991 | default, and may be disabled using @option{--disable-lto}. |
2d413304 | 1992 | |
45b3824d TS |
1993 | @item --enable-linker-plugin-configure-flags=FLAGS |
1994 | @itemx --enable-linker-plugin-flags=FLAGS | |
1995 | By default, linker plugins (such as the LTO plugin) are built for the | |
1996 | host system architecture. For the case that the linker has a | |
1997 | different (but run-time compatible) architecture, these flags can be | |
1998 | specified to build plugins that are compatible to the linker. For | |
1999 | example, if you are building GCC for a 64-bit x86_64 | |
2000 | (@samp{x86_64-unknown-linux-gnu}) host system, but have a 32-bit x86 | |
2001 | GNU/Linux (@samp{i686-pc-linux-gnu}) linker executable (which is | |
2002 | executable on the former system), you can configure GCC as follows for | |
2003 | getting compatible linker plugins: | |
2004 | ||
2005 | @smallexample | |
2006 | % @var{srcdir}/configure \ | |
2007 | --host=x86_64-unknown-linux-gnu \ | |
2008 | --enable-linker-plugin-configure-flags=--host=i686-pc-linux-gnu \ | |
2009 | --enable-linker-plugin-flags='CC=gcc\ -m32\ -Wl,-rpath,[...]/i686-pc-linux-gnu/lib' | |
2010 | @end smallexample | |
2011 | ||
09a52fc3 RG |
2012 | @item --with-plugin-ld=@var{pathname} |
2013 | Enable an alternate linker to be used at link-time optimization (LTO) | |
2014 | link time when @option{-fuse-linker-plugin} is enabled. | |
2015 | This linker should have plugin support such as gold starting with | |
2016 | version 2.20 or GNU ld starting with version 2.21. | |
2017 | See @option{-fuse-linker-plugin} for details. | |
5dc99c46 SB |
2018 | |
2019 | @item --enable-canonical-system-headers | |
2020 | @itemx --disable-canonical-system-headers | |
2021 | Enable system header path canonicalization for @file{libcpp}. This can | |
2022 | produce shorter header file paths in diagnostics and dependency output | |
2023 | files, but these changed header paths may conflict with some compilation | |
2024 | environments. Enabled by default, and may be disabled using | |
2025 | @option{--disable-canonical-system-headers}. | |
75a2bcc0 JM |
2026 | |
2027 | @item --with-glibc-version=@var{major}.@var{minor} | |
2028 | Tell GCC that when the GNU C Library (glibc) is used on the target it | |
2029 | will be version @var{major}.@var{minor} or later. Normally this can | |
2030 | be detected from the C library's header files, but this option may be | |
2031 | needed when bootstrapping a cross toolchain without the header files | |
2032 | available for building the initial bootstrap compiler. | |
2033 | ||
2034 | If GCC is configured with some multilibs that use glibc and some that | |
2035 | do not, this option applies only to the multilibs that use glibc. | |
2036 | However, such configurations may not work well as not all the relevant | |
2037 | configuration in GCC is on a per-multilib basis. | |
85c64bbe BS |
2038 | |
2039 | @item --enable-as-accelerator-for=@var{target} | |
2040 | Build as offload target compiler. Specify offload host triple by @var{target}. | |
2041 | ||
2042 | @item --enable-offload-targets=@var{target1}[=@var{path1}],@dots{},@var{targetN}[=@var{pathN}] | |
2043 | Enable offloading to targets @var{target1}, @dots{}, @var{targetN}. | |
2044 | Offload compilers are expected to be already installed. Default search | |
2045 | path for them is @file{@var{exec-prefix}}, but it can be changed by | |
2046 | specifying paths @var{path1}, @dots{}, @var{pathN}. | |
2047 | ||
2048 | @smallexample | |
2049 | % @var{srcdir}/configure \ | |
2050 | --enable-offload-target=i686-unknown-linux-gnu=/path/to/i686/compiler,x86_64-pc-linux-gnu | |
2051 | @end smallexample | |
b2b40051 MJ |
2052 | |
2053 | If @samp{hsa} is specified as one of the targets, the compiler will be | |
2054 | built with support for HSA GPU accelerators. Because the same | |
2055 | compiler will emit the accelerator code, no path should be specified. | |
2056 | ||
2057 | @item --with-hsa-runtime=@var{pathname} | |
2058 | @itemx --with-hsa-runtime-include=@var{pathname} | |
2059 | @itemx --with-hsa-runtime-lib=@var{pathname} | |
2060 | ||
2061 | If you configure GCC with HSA offloading but do not have the HSA | |
2062 | run-time library installed in a standard location then you can | |
2063 | explicitly specify the directory where they are installed. The | |
2064 | @option{--with-hsa-runtime=@/@var{hsainstalldir}} option is a | |
2065 | shorthand for | |
2066 | @option{--with-hsa-runtime-lib=@/@var{hsainstalldir}/lib} and | |
2067 | @option{--with-hsa-runtime-include=@/@var{hsainstalldir}/include}. | |
1ecae1fc IT |
2068 | |
2069 | @item --enable-cet | |
2070 | @itemx --disable-cet | |
2071 | Enable building target run-time libraries with control-flow | |
2072 | instrumentation, see @option{-fcf-protection} option. When | |
2073 | @code{--enable-cet} is specified target libraries are configured | |
2074 | to add @option{-fcf-protection} and, if needed, other target | |
2075 | specific options to a set of building options. | |
2076 | ||
2077 | The option is enabled by default on Linux/x86 if target binutils | |
2078 | supports @code{Intel CET} instructions. In this case the target | |
2079 | libraries are configured to get additional @option{-fcf-protection} | |
2080 | and @option{-mcet} options. | |
ef88b07d | 2081 | @end table |
f42974dc | 2082 | |
c1c3bb0c ME |
2083 | @subheading Cross-Compiler-Specific Options |
2084 | The following options only apply to building cross compilers. | |
0b70519f | 2085 | |
ef88b07d | 2086 | @table @code |
4977bab6 ZW |
2087 | @item --with-sysroot |
2088 | @itemx --with-sysroot=@var{dir} | |
d47abcca JW |
2089 | Tells GCC to consider @var{dir} as the root of a tree that contains |
2090 | (a subset of) the root filesystem of the target operating system. | |
4977bab6 | 2091 | Target system headers, libraries and run-time object files will be |
169264b3 | 2092 | searched for in there. More specifically, this acts as if |
0b70519f RW |
2093 | @option{--sysroot=@var{dir}} was added to the default options of the built |
2094 | compiler. The specified directory is not copied into the | |
4977bab6 ZW |
2095 | install tree, unlike the options @option{--with-headers} and |
2096 | @option{--with-libs} that this option obsoletes. The default value, | |
2097 | in case @option{--with-sysroot} is not given an argument, is | |
047d636f DJ |
2098 | @option{$@{gcc_tooldir@}/sys-root}. If the specified directory is a |
2099 | subdirectory of @option{$@{exec_prefix@}}, then it will be found relative to | |
2100 | the GCC binaries if the installation tree is moved. | |
4977bab6 | 2101 | |
0b70519f RW |
2102 | This option affects the system root for the compiler used to build |
2103 | target libraries (which runs on the build system) and the compiler newly | |
2104 | installed with @code{make install}; it does not affect the compiler which is | |
2105 | used to build GCC itself. | |
2106 | ||
08b2bad2 SB |
2107 | If you specify the @option{--with-native-system-header-dir=@var{dirname}} |
2108 | option then the compiler will search that directory within @var{dirname} for | |
2109 | native system headers rather than the default @file{/usr/include}. | |
2110 | ||
160633c6 MM |
2111 | @item --with-build-sysroot |
2112 | @itemx --with-build-sysroot=@var{dir} | |
2113 | Tells GCC to consider @var{dir} as the system root (see | |
526635cb | 2114 | @option{--with-sysroot}) while building target libraries, instead of |
160633c6 MM |
2115 | the directory specified with @option{--with-sysroot}. This option is |
2116 | only useful when you are already using @option{--with-sysroot}. You | |
526635cb | 2117 | can use @option{--with-build-sysroot} when you are configuring with |
160633c6 | 2118 | @option{--prefix} set to a directory that is different from the one in |
ff2ce160 | 2119 | which you are installing GCC and your target libraries. |
526635cb MM |
2120 | |
2121 | This option affects the system root for the compiler used to build | |
2122 | target libraries (which runs on the build system); it does not affect | |
2123 | the compiler which is used to build GCC itself. | |
160633c6 | 2124 | |
08b2bad2 SB |
2125 | If you specify the @option{--with-native-system-header-dir=@var{dirname}} |
2126 | option then the compiler will search that directory within @var{dirname} for | |
2127 | native system headers rather than the default @file{/usr/include}. | |
2128 | ||
65a824f6 JT |
2129 | @item --with-headers |
2130 | @itemx --with-headers=@var{dir} | |
4977bab6 | 2131 | Deprecated in favor of @option{--with-sysroot}. |
65a824f6 JT |
2132 | Specifies that target headers are available when building a cross compiler. |
2133 | The @var{dir} argument specifies a directory which has the target include | |
2134 | files. These include files will be copied into the @file{gcc} install | |
2135 | directory. @emph{This option with the @var{dir} argument is required} when | |
2136 | building a cross compiler, if @file{@var{prefix}/@var{target}/sys-include} | |
2137 | doesn't pre-exist. If @file{@var{prefix}/@var{target}/sys-include} does | |
2138 | pre-exist, the @var{dir} argument may be omitted. @command{fixincludes} | |
8a36672b | 2139 | will be run on these files to make them compatible with GCC@. |
264d65c1 AP |
2140 | |
2141 | @item --without-headers | |
2142 | Tells GCC not use any target headers from a libc when building a cross | |
2dd76960 | 2143 | compiler. When crossing to GNU/Linux, you need the headers so GCC |
264d65c1 | 2144 | can build the exception handling for libgcc. |
264d65c1 | 2145 | |
65a824f6 | 2146 | @item --with-libs |
0b70519f | 2147 | @itemx --with-libs="@var{dir1} @var{dir2} @dots{} @var{dirN}" |
4977bab6 | 2148 | Deprecated in favor of @option{--with-sysroot}. |
38209993 LG |
2149 | Specifies a list of directories which contain the target runtime |
2150 | libraries. These libraries will be copied into the @file{gcc} install | |
65a824f6 JT |
2151 | directory. If the directory list is omitted, this option has no |
2152 | effect. | |
cc11cc9b | 2153 | |
ef88b07d | 2154 | @item --with-newlib |
eea81d3e | 2155 | Specifies that @samp{newlib} is |
38209993 | 2156 | being used as the target C library. This causes @code{__eprintf} to be |
eea81d3e RO |
2157 | omitted from @file{libgcc.a} on the assumption that it will be provided by |
2158 | @samp{newlib}. | |
cc11cc9b | 2159 | |
2a095093 GJL |
2160 | @item --with-avrlibc |
2161 | Specifies that @samp{AVR-Libc} is | |
2162 | being used as the target C library. This causes float support | |
2163 | functions like @code{__addsf3} to be omitted from @file{libgcc.a} on | |
2164 | the assumption that it will be provided by @file{libm.a}. For more | |
2165 | technical details, cf. @uref{http://gcc.gnu.org/PR54461,,PR54461}. | |
2166 | This option is only supported for the AVR target. It is not supported for | |
2167 | RTEMS configurations, which currently use newlib. The option is | |
2168 | supported since version 4.7.2 and is the default in 4.8.0 and newer. | |
2169 | ||
9304f876 CJW |
2170 | @item --with-nds32-lib=@var{library} |
2171 | Specifies that @var{library} setting is used for building @file{libgcc.a}. | |
2172 | Currently, the valid @var{library} is @samp{newlib} or @samp{mculib}. | |
2173 | This option is only supported for the NDS32 target. | |
2174 | ||
cc11cc9b PB |
2175 | @item --with-build-time-tools=@var{dir} |
2176 | Specifies where to find the set of target tools (assembler, linker, etc.) | |
2177 | that will be used while building GCC itself. This option can be useful | |
2178 | if the directory layouts are different between the system you are building | |
2179 | GCC on, and the system where you will deploy it. | |
2180 | ||
e4ae5e77 | 2181 | For example, on an @samp{ia64-hp-hpux} system, you may have the GNU |
cc11cc9b PB |
2182 | assembler and linker in @file{/usr/bin}, and the native tools in a |
2183 | different path, and build a toolchain that expects to find the | |
2184 | native tools in @file{/usr/bin}. | |
2185 | ||
2186 | When you use this option, you should ensure that @var{dir} includes | |
2187 | @command{ar}, @command{as}, @command{ld}, @command{nm}, | |
2188 | @command{ranlib} and @command{strip} if necessary, and possibly | |
2189 | @command{objdump}. Otherwise, GCC may use an inconsistent set of | |
2190 | tools. | |
ef88b07d | 2191 | @end table |
f9047ed3 | 2192 | |
ffedf511 RW |
2193 | @subsubheading Overriding @command{configure} test results |
2194 | ||
2195 | Sometimes, it might be necessary to override the result of some | |
2196 | @command{configure} test, for example in order to ease porting to a new | |
2197 | system or work around a bug in a test. The toplevel @command{configure} | |
2198 | script provides three variables for this: | |
2199 | ||
2200 | @table @code | |
2201 | ||
2202 | @item build_configargs | |
2203 | @cindex @code{build_configargs} | |
2204 | The contents of this variable is passed to all build @command{configure} | |
2205 | scripts. | |
2206 | ||
2207 | @item host_configargs | |
2208 | @cindex @code{host_configargs} | |
2209 | The contents of this variable is passed to all host @command{configure} | |
2210 | scripts. | |
2211 | ||
2212 | @item target_configargs | |
2213 | @cindex @code{target_configargs} | |
2214 | The contents of this variable is passed to all target @command{configure} | |
2215 | scripts. | |
2216 | ||
2217 | @end table | |
2218 | ||
2219 | In order to avoid shell and @command{make} quoting issues for complex | |
2220 | overrides, you can pass a setting for @env{CONFIG_SITE} and set | |
2221 | variables in the site file. | |
2222 | ||
114bf3f1 MK |
2223 | @subheading Objective-C-Specific Options |
2224 | ||
2225 | The following options apply to the build of the Objective-C runtime library. | |
2226 | ||
2227 | @table @code | |
2228 | @item --enable-objc-gc | |
2229 | Specify that an additional variant of the GNU Objective-C runtime library | |
2230 | is built, using an external build of the Boehm-Demers-Weiser garbage | |
2231 | collector (@uref{http://www.hboehm.info/gc/}). This library needs to be | |
2232 | available for each multilib variant, unless configured with | |
2233 | @option{--enable-objc-gc=@samp{auto}} in which case the build of the | |
2234 | additional runtime library is skipped when not available and the build | |
2235 | continues. | |
2236 | ||
2237 | @item --with-target-bdw-gc=@var{list} | |
2238 | @itemx --with-target-bdw-gc-include=@var{list} | |
2239 | @itemx --with-target-bdw-gc-lib=@var{list} | |
2240 | Specify search directories for the garbage collector header files and | |
2241 | libraries. @var{list} is a comma separated list of key value pairs of the | |
f521b293 | 2242 | form @samp{@var{multilibdir}=@var{path}}, where the default multilib key |
114bf3f1 MK |
2243 | is named as @samp{.} (dot), or is omitted (e.g. |
2244 | @samp{--with-target-bdw-gc=/opt/bdw-gc,32=/opt-bdw-gc32}). | |
2245 | ||
2246 | The options @option{--with-target-bdw-gc-include} and | |
2247 | @option{--with-target-bdw-gc-lib} must always be specified together | |
2248 | for each multilib variant and they take precedence over | |
8465132c MK |
2249 | @option{--with-target-bdw-gc}. If @option{--with-target-bdw-gc-include} |
2250 | is missing values for a multilib, then the value for the default | |
2251 | multilib is used (e.g. @samp{--with-target-bdw-gc-include=/opt/bdw-gc/include} | |
2252 | @samp{--with-target-bdw-gc-lib=/opt/bdw-gc/lib64,32=/opt-bdw-gc/lib32}). | |
2253 | If none of these options are specified, the library is assumed in | |
2254 | default locations. | |
114bf3f1 MK |
2255 | @end table |
2256 | ||
f42974dc | 2257 | @html |
b8db17af | 2258 | <hr /> |
f42974dc DW |
2259 | <p> |
2260 | @end html | |
2261 | @ifhtml | |
2262 | @uref{./index.html,,Return to the GCC Installation page} | |
2263 | @end ifhtml | |
2264 | @end ifset | |
2265 | ||
2266 | @c ***Building**************************************************************** | |
6cfb3f16 | 2267 | @ifnothtml |
f42974dc DW |
2268 | @comment node-name, next, previous, up |
2269 | @node Building, Testing, Configuration, Installing GCC | |
6cfb3f16 | 2270 | @end ifnothtml |
f42974dc | 2271 | @ifset buildhtml |
f42974dc DW |
2272 | @ifnothtml |
2273 | @chapter Building | |
2274 | @end ifnothtml | |
2275 | @cindex Installing GCC: Building | |
2276 | ||
2277 | Now that GCC is configured, you are ready to build the compiler and | |
2278 | runtime libraries. | |
2279 | ||
b8df899a | 2280 | Some commands executed when making the compiler may fail (return a |
7ba4ca63 | 2281 | nonzero status) and be ignored by @command{make}. These failures, which |
b8df899a JM |
2282 | are often due to files that were not found, are expected, and can safely |
2283 | be ignored. | |
2284 | ||
2285 | It is normal to have compiler warnings when compiling certain files. | |
2286 | Unless you are a GCC developer, you can generally ignore these warnings | |
dd859b8a KG |
2287 | unless they cause compilation to fail. Developers should attempt to fix |
2288 | any warnings encountered, however they can temporarily continue past | |
2289 | warnings-as-errors by specifying the configure flag | |
2290 | @option{--disable-werror}. | |
b8df899a JM |
2291 | |
2292 | On certain old systems, defining certain environment variables such as | |
6cfb3f16 | 2293 | @env{CC} can interfere with the functioning of @command{make}. |
b8df899a JM |
2294 | |
2295 | If you encounter seemingly strange errors when trying to build the | |
2296 | compiler in a directory other than the source directory, it could be | |
2297 | because you have previously configured the compiler in the source | |
2298 | directory. Make sure you have done all the necessary preparations. | |
2299 | ||
2300 | If you build GCC on a BSD system using a directory stored in an old System | |
4c64396e | 2301 | V file system, problems may occur in running @command{fixincludes} if the |
b8df899a JM |
2302 | System V file system doesn't support symbolic links. These problems |
2303 | result in a failure to fix the declaration of @code{size_t} in | |
2304 | @file{sys/types.h}. If you find that @code{size_t} is a signed type and | |
2305 | that type mismatches occur, this could be the cause. | |
2306 | ||
161d7b59 | 2307 | The solution is not to use such a directory for building GCC@. |
f42974dc | 2308 | |
01d419ae | 2309 | Similarly, when building from SVN or snapshots, or if you modify |
e8645a40 TT |
2310 | @file{*.l} files, you need the Flex lexical analyzer generator |
2311 | installed. If you do not modify @file{*.l} files, releases contain | |
2312 | the Flex-generated files and you do not need Flex installed to build | |
2313 | them. There is still one Flex-based lexical analyzer (part of the | |
2314 | build machinery, not of GCC itself) that is used even if you only | |
2315 | build the C front end. | |
f85b8d1a | 2316 | |
80521187 | 2317 | When building from SVN or snapshots, or if you modify Texinfo |
7326a39e | 2318 | documentation, you need version 4.7 or later of Texinfo installed if you |
f85b8d1a JM |
2319 | want Info documentation to be regenerated. Releases contain Info |
2320 | documentation pre-built for the unmodified documentation in the release. | |
2321 | ||
f42974dc DW |
2322 | @section Building a native compiler |
2323 | ||
f5c3bb4b PB |
2324 | For a native build, the default configuration is to perform |
2325 | a 3-stage bootstrap of the compiler when @samp{make} is invoked. | |
2326 | This will build the entire GCC system and ensure that it compiles | |
2327 | itself correctly. It can be disabled with the @option{--disable-bootstrap} | |
2328 | parameter to @samp{configure}, but bootstrapping is suggested because | |
2329 | the compiler will be tested more completely and could also have | |
2330 | better performance. | |
2331 | ||
2332 | The bootstrapping process will complete the following steps: | |
f42974dc DW |
2333 | |
2334 | @itemize @bullet | |
2335 | @item | |
80521187 | 2336 | Build tools necessary to build the compiler. |
f42974dc DW |
2337 | |
2338 | @item | |
cc11cc9b PB |
2339 | Perform a 3-stage bootstrap of the compiler. This includes building |
2340 | three times the target tools for use by the compiler such as binutils | |
2341 | (bfd, binutils, gas, gprof, ld, and opcodes) if they have been | |
2342 | individually linked or moved into the top level GCC source tree before | |
2343 | configuring. | |
f42974dc DW |
2344 | |
2345 | @item | |
2346 | Perform a comparison test of the stage2 and stage3 compilers. | |
2347 | ||
2348 | @item | |
2349 | Build runtime libraries using the stage3 compiler from the previous step. | |
f9047ed3 | 2350 | |
f42974dc DW |
2351 | @end itemize |
2352 | ||
38209993 | 2353 | If you are short on disk space you might consider @samp{make |
cc11cc9b PB |
2354 | bootstrap-lean} instead. The sequence of compilation is the |
2355 | same described above, but object files from the stage1 and | |
f42974dc DW |
2356 | stage2 of the 3-stage bootstrap of the compiler are deleted as |
2357 | soon as they are no longer needed. | |
2358 | ||
1c8bd6a3 PB |
2359 | If you wish to use non-default GCC flags when compiling the stage2 |
2360 | and stage3 compilers, set @code{BOOT_CFLAGS} on the command line when | |
2361 | doing @samp{make}. For example, if you want to save additional space | |
2362 | during the bootstrap and in the final installation as well, you can | |
2363 | build the compiler binaries without debugging information as in the | |
2364 | following example. This will save roughly 40% of disk space both for | |
2365 | the bootstrap and the final installation. (Libraries will still contain | |
2366 | debugging information.) | |
f42974dc | 2367 | |
3ab51846 | 2368 | @smallexample |
98797784 | 2369 | make BOOT_CFLAGS='-O' bootstrap |
3ab51846 | 2370 | @end smallexample |
8c085f6f | 2371 | |
1c8bd6a3 PB |
2372 | You can place non-default optimization flags into @code{BOOT_CFLAGS}; they |
2373 | are less well tested here than the default of @samp{-g -O2}, but should | |
2374 | still work. In a few cases, you may find that you need to specify special | |
2375 | flags such as @option{-msoft-float} here to complete the bootstrap; or, | |
2376 | if the native compiler miscompiles the stage1 compiler, you may need | |
2377 | to work around this, by choosing @code{BOOT_CFLAGS} to avoid the parts | |
2378 | of the stage1 compiler that were miscompiled, or by using @samp{make | |
f85b8d1a JM |
2379 | bootstrap4} to increase the number of stages of bootstrap. |
2380 | ||
1c8bd6a3 PB |
2381 | @code{BOOT_CFLAGS} does not apply to bootstrapped target libraries. |
2382 | Since these are always compiled with the compiler currently being | |
2383 | bootstrapped, you can use @code{CFLAGS_FOR_TARGET} to modify their | |
2384 | compilation flags, as for non-bootstrapped target libraries. | |
2385 | Again, if the native compiler miscompiles the stage1 compiler, you may | |
2386 | need to work around this by avoiding non-working parts of the stage1 | |
4a4a4e99 | 2387 | compiler. Use @code{STAGE1_TFLAGS} to this end. |
c872077c | 2388 | |
6cfb3f16 | 2389 | If you used the flag @option{--enable-languages=@dots{}} to restrict |
f42974dc | 2390 | the compilers to be built, only those you've actually enabled will be |
767094dd | 2391 | built. This will of course only build those runtime libraries, for |
f42974dc | 2392 | which the particular compiler has been built. Please note, |
cc11cc9b | 2393 | that re-defining @env{LANGUAGES} when calling @samp{make} |
ef88b07d | 2394 | @strong{does not} work anymore! |
f42974dc | 2395 | |
f85b8d1a | 2396 | If the comparison of stage2 and stage3 fails, this normally indicates |
eea81d3e | 2397 | that the stage2 compiler has compiled GCC incorrectly, and is therefore |
f85b8d1a JM |
2398 | a potentially serious bug which you should investigate and report. (On |
2399 | a few systems, meaningful comparison of object files is impossible; they | |
2400 | always appear ``different''. If you encounter this problem, you will | |
2401 | need to disable comparison in the @file{Makefile}.) | |
f42974dc | 2402 | |
cc11cc9b PB |
2403 | If you do not want to bootstrap your compiler, you can configure with |
2404 | @option{--disable-bootstrap}. In particular cases, you may want to | |
2405 | bootstrap your compiler even if the target system is not the same as | |
2406 | the one you are building on: for example, you could build a | |
2407 | @code{powerpc-unknown-linux-gnu} toolchain on a | |
2408 | @code{powerpc64-unknown-linux-gnu} host. In this case, pass | |
2409 | @option{--enable-bootstrap} to the configure script. | |
2410 | ||
e12c4094 AO |
2411 | @code{BUILD_CONFIG} can be used to bring in additional customization |
2412 | to the build. It can be set to a whitespace-separated list of names. | |
2413 | For each such @code{NAME}, top-level @file{config/@code{NAME}.mk} will | |
2414 | be included by the top-level @file{Makefile}, bringing in any settings | |
2415 | it contains. The default @code{BUILD_CONFIG} can be set using the | |
2416 | configure option @option{--with-build-config=@code{NAME}...}. Some | |
2417 | examples of supported build configurations are: | |
4a4a4e99 AO |
2418 | |
2419 | @table @asis | |
2420 | @item @samp{bootstrap-O1} | |
2421 | Removes any @option{-O}-started option from @code{BOOT_CFLAGS}, and adds | |
2422 | @option{-O1} to it. @samp{BUILD_CONFIG=bootstrap-O1} is equivalent to | |
2423 | @samp{BOOT_CFLAGS='-g -O1'}. | |
2424 | ||
2425 | @item @samp{bootstrap-O3} | |
2426 | Analogous to @code{bootstrap-O1}. | |
2427 | ||
339325b3 AO |
2428 | @item @samp{bootstrap-lto} |
2429 | Enables Link-Time Optimization for host tools during bootstrapping. | |
2430 | @samp{BUILD_CONFIG=bootstrap-lto} is equivalent to adding | |
871fe673 UB |
2431 | @option{-flto} to @samp{BOOT_CFLAGS}. This option assumes that the host |
2432 | supports the linker plugin (e.g. GNU ld version 2.21 or later or GNU gold | |
2433 | version 2.21 or later). | |
2434 | ||
2435 | @item @samp{bootstrap-lto-noplugin} | |
2436 | This option is similar to @code{bootstrap-lto}, but is intended for | |
47eec994 GP |
2437 | hosts that do not support the linker plugin. Without the linker plugin |
2438 | static libraries are not compiled with link-time optimizations. Since | |
2439 | the GCC middle end and back end are in @file{libbackend.a} this means | |
2440 | that only the front end is actually LTO optimized. | |
339325b3 | 2441 | |
4a4a4e99 | 2442 | @item @samp{bootstrap-debug} |
b5b8b0ac | 2443 | Verifies that the compiler generates the same executable code, whether |
e12c4094 AO |
2444 | or not it is asked to emit debug information. To this end, this |
2445 | option builds stage2 host programs without debug information, and uses | |
b5b8b0ac AO |
2446 | @file{contrib/compare-debug} to compare them with the stripped stage3 |
2447 | object files. If @code{BOOT_CFLAGS} is overridden so as to not enable | |
2448 | debug information, stage2 will have it, and stage3 won't. This option | |
e12c4094 AO |
2449 | is enabled by default when GCC bootstrapping is enabled, if |
2450 | @code{strip} can turn object files compiled with and without debug | |
2451 | info into identical object files. In addition to better test | |
2452 | coverage, this option makes default bootstraps faster and leaner. | |
b5b8b0ac AO |
2453 | |
2454 | @item @samp{bootstrap-debug-big} | |
e12c4094 AO |
2455 | Rather than comparing stripped object files, as in |
2456 | @code{bootstrap-debug}, this option saves internal compiler dumps | |
2457 | during stage2 and stage3 and compares them as well, which helps catch | |
2458 | additional potential problems, but at a great cost in terms of disk | |
2459 | space. It can be specified in addition to @samp{bootstrap-debug}. | |
b5b8b0ac AO |
2460 | |
2461 | @item @samp{bootstrap-debug-lean} | |
2462 | This option saves disk space compared with @code{bootstrap-debug-big}, | |
2463 | but at the expense of some recompilation. Instead of saving the dumps | |
2464 | of stage2 and stage3 until the final compare, it uses | |
2465 | @option{-fcompare-debug} to generate, compare and remove the dumps | |
2466 | during stage3, repeating the compilation that already took place in | |
2467 | stage2, whose dumps were not saved. | |
2468 | ||
2469 | @item @samp{bootstrap-debug-lib} | |
2470 | This option tests executable code invariance over debug information | |
2471 | generation on target libraries, just like @code{bootstrap-debug-lean} | |
2472 | tests it on host programs. It builds stage3 libraries with | |
2473 | @option{-fcompare-debug}, and it can be used along with any of the | |
2474 | @code{bootstrap-debug} options above. | |
2475 | ||
2476 | There aren't @code{-lean} or @code{-big} counterparts to this option | |
2477 | because most libraries are only build in stage3, so bootstrap compares | |
2478 | would not get significant coverage. Moreover, the few libraries built | |
2479 | in stage2 are used in stage3 host programs, so we wouldn't want to | |
2480 | compile stage2 libraries with different options for comparison purposes. | |
2481 | ||
2482 | @item @samp{bootstrap-debug-ckovw} | |
2483 | Arranges for error messages to be issued if the compiler built on any | |
2484 | stage is run without the option @option{-fcompare-debug}. This is | |
2485 | useful to verify the full @option{-fcompare-debug} testing coverage. It | |
2486 | must be used along with @code{bootstrap-debug-lean} and | |
2487 | @code{bootstrap-debug-lib}. | |
2488 | ||
c58a9f35 L |
2489 | @item @samp{bootstrap-cet} |
2490 | This option enables Intel CET for host tools during bootstrapping. | |
2491 | @samp{BUILD_CONFIG=bootstrap-cet} is equivalent to adding | |
2492 | @option{-fcf-protection -mcet} to @samp{BOOT_CFLAGS}. This option | |
2493 | assumes that the host supports Intel CET (e.g. GNU assembler version | |
2494 | 2.30 or later). | |
2495 | ||
b5b8b0ac AO |
2496 | @item @samp{bootstrap-time} |
2497 | Arranges for the run time of each program started by the GCC driver, | |
2498 | built in any stage, to be logged to @file{time.log}, in the top level of | |
2499 | the build tree. | |
4a4a4e99 AO |
2500 | |
2501 | @end table | |
cc11cc9b | 2502 | |
f42974dc DW |
2503 | @section Building a cross compiler |
2504 | ||
f42974dc DW |
2505 | When building a cross compiler, it is not generally possible to do a |
2506 | 3-stage bootstrap of the compiler. This makes for an interesting problem | |
161d7b59 | 2507 | as parts of GCC can only be built with GCC@. |
f42974dc | 2508 | |
0b70519f | 2509 | To build a cross compiler, we recommend first building and installing a |
f42974dc | 2510 | native compiler. You can then use the native GCC compiler to build the |
635771af JM |
2511 | cross compiler. The installed native compiler needs to be GCC version |
2512 | 2.95 or later. | |
f42974dc DW |
2513 | |
2514 | Assuming you have already installed a native copy of GCC and configured | |
6cfb3f16 | 2515 | your cross compiler, issue the command @command{make}, which performs the |
f42974dc DW |
2516 | following steps: |
2517 | ||
2518 | @itemize @bullet | |
2519 | @item | |
80521187 | 2520 | Build host tools necessary to build the compiler. |
f42974dc DW |
2521 | |
2522 | @item | |
2523 | Build target tools for use by the compiler such as binutils (bfd, | |
2524 | binutils, gas, gprof, ld, and opcodes) | |
2525 | if they have been individually linked or moved into the top level GCC source | |
2526 | tree before configuring. | |
2527 | ||
2528 | @item | |
2529 | Build the compiler (single stage only). | |
2530 | ||
2531 | @item | |
2532 | Build runtime libraries using the compiler from the previous step. | |
2533 | @end itemize | |
2534 | ||
2535 | Note that if an error occurs in any step the make process will exit. | |
2536 | ||
01e97976 JM |
2537 | If you are not building GNU binutils in the same source tree as GCC, |
2538 | you will need a cross-assembler and cross-linker installed before | |
2539 | configuring GCC@. Put them in the directory | |
2540 | @file{@var{prefix}/@var{target}/bin}. Here is a table of the tools | |
2541 | you should put in this directory: | |
2542 | ||
2543 | @table @file | |
2544 | @item as | |
2545 | This should be the cross-assembler. | |
2546 | ||
2547 | @item ld | |
2548 | This should be the cross-linker. | |
2549 | ||
2550 | @item ar | |
2551 | This should be the cross-archiver: a program which can manipulate | |
2552 | archive files (linker libraries) in the target machine's format. | |
2553 | ||
2554 | @item ranlib | |
2555 | This should be a program to construct a symbol table in an archive file. | |
2556 | @end table | |
2557 | ||
2558 | The installation of GCC will find these programs in that directory, | |
2559 | and copy or link them to the proper place to for the cross-compiler to | |
2560 | find them when run later. | |
2561 | ||
2562 | The easiest way to provide these files is to build the Binutils package. | |
2563 | Configure it with the same @option{--host} and @option{--target} | |
2564 | options that you use for configuring GCC, then build and install | |
2565 | them. They install their executables automatically into the proper | |
2566 | directory. Alas, they do not support all the targets that GCC | |
2567 | supports. | |
2568 | ||
2569 | If you are not building a C library in the same source tree as GCC, | |
2570 | you should also provide the target libraries and headers before | |
2571 | configuring GCC, specifying the directories with | |
2572 | @option{--with-sysroot} or @option{--with-headers} and | |
2573 | @option{--with-libs}. Many targets also require ``start files'' such | |
2574 | as @file{crt0.o} and | |
2575 | @file{crtn.o} which are linked into each executable. There may be several | |
2576 | alternatives for @file{crt0.o}, for use with profiling or other | |
2577 | compilation options. Check your target's definition of | |
2578 | @code{STARTFILE_SPEC} to find out what start files it uses. | |
2579 | ||
f42974dc DW |
2580 | @section Building in parallel |
2581 | ||
0b70519f | 2582 | GNU Make 3.80 and above, which is necessary to build GCC, support |
d7f755c3 | 2583 | building in parallel. To activate this, you can use @samp{make -j 2} |
ff2ce160 | 2584 | instead of @samp{make}. You can also specify a bigger number, and |
cc11cc9b PB |
2585 | in most cases using a value greater than the number of processors in |
2586 | your machine will result in fewer and shorter I/O latency hits, thus | |
2587 | improving overall throughput; this is especially true for slow drives | |
2588 | and network filesystems. | |
f42974dc | 2589 | |
e23381df GB |
2590 | @section Building the Ada compiler |
2591 | ||
2592 | In order to build GNAT, the Ada compiler, you need a working GNAT | |
1004318e | 2593 | compiler (GCC version 4.0 or later). |
cc11cc9b PB |
2594 | This includes GNAT tools such as @command{gnatmake} and |
2595 | @command{gnatlink}, since the Ada front end is written in Ada and | |
2596 | uses some GNAT-specific extensions. | |
2597 | ||
2598 | In order to build a cross compiler, it is suggested to install | |
2599 | the new compiler as native first, and then use it to build the cross | |
2600 | compiler. | |
e23381df | 2601 | |
38e23049 JM |
2602 | @command{configure} does not test whether the GNAT installation works |
2603 | and has a sufficiently recent version; if too old a GNAT version is | |
2604 | installed, the build will fail unless @option{--enable-languages} is | |
2605 | used to disable building the Ada front end. | |
e23381df | 2606 | |
e397a9f1 ST |
2607 | @env{ADA_INCLUDE_PATH} and @env{ADA_OBJECT_PATH} environment variables |
2608 | must not be set when building the Ada compiler, the Ada tools, or the | |
2609 | Ada runtime libraries. You can check that your build environment is clean | |
2610 | by verifying that @samp{gnatls -v} lists only one explicit path in each | |
2611 | section. | |
2612 | ||
8f231b5d JH |
2613 | @section Building with profile feedback |
2614 | ||
2615 | It is possible to use profile feedback to optimize the compiler itself. This | |
2616 | should result in a faster compiler binary. Experiments done on x86 using gcc | |
2617 | 3.3 showed approximately 7 percent speedup on compiling C programs. To | |
cc11cc9b | 2618 | bootstrap the compiler with profile feedback, use @code{make profiledbootstrap}. |
8f231b5d JH |
2619 | |
2620 | When @samp{make profiledbootstrap} is run, it will first build a @code{stage1} | |
2621 | compiler. This compiler is used to build a @code{stageprofile} compiler | |
2622 | instrumented to collect execution counts of instruction and branch | |
0d053a49 ML |
2623 | probabilities. Training run is done by building @code{stagetrain} |
2624 | compiler. Finally a @code{stagefeedback} compiler is built | |
2625 | using the information collected. | |
8f231b5d | 2626 | |
cc11cc9b | 2627 | Unlike standard bootstrap, several additional restrictions apply. The |
8f231b5d | 2628 | compiler used to build @code{stage1} needs to support a 64-bit integral type. |
167c3e96 | 2629 | It is recommended to only use GCC for this. |
8f231b5d | 2630 | |
277d7ee0 AK |
2631 | On Linux/x86_64 hosts with some restrictions (no virtualization) it is |
2632 | also possible to do autofdo build with @samp{make | |
2633 | autoprofiledback}. This uses Linux perf to sample branches in the | |
2634 | binary and then rebuild it with feedback derived from the profile. | |
2635 | Linux perf and the @code{autofdo} toolkit needs to be installed for | |
2636 | this. | |
2637 | ||
2638 | Only the profile from the current build is used, so when an error | |
2639 | occurs it is recommended to clean before restarting. Otherwise | |
2640 | the code quality may be much worse. | |
2641 | ||
f42974dc | 2642 | @html |
b8db17af | 2643 | <hr /> |
f42974dc DW |
2644 | <p> |
2645 | @end html | |
2646 | @ifhtml | |
2647 | @uref{./index.html,,Return to the GCC Installation page} | |
2648 | @end ifhtml | |
2649 | @end ifset | |
2650 | ||
2651 | @c ***Testing***************************************************************** | |
6cfb3f16 | 2652 | @ifnothtml |
f42974dc DW |
2653 | @comment node-name, next, previous, up |
2654 | @node Testing, Final install, Building, Installing GCC | |
6cfb3f16 | 2655 | @end ifnothtml |
f42974dc | 2656 | @ifset testhtml |
f42974dc DW |
2657 | @ifnothtml |
2658 | @chapter Installing GCC: Testing | |
2659 | @end ifnothtml | |
2660 | @cindex Testing | |
2661 | @cindex Installing GCC: Testing | |
2662 | @cindex Testsuite | |
2663 | ||
f97903cc JJ |
2664 | Before you install GCC, we encourage you to run the testsuites and to |
2665 | compare your results with results from a similar configuration that have | |
2666 | been submitted to the | |
2667 | @uref{http://gcc.gnu.org/ml/gcc-testresults/,,gcc-testresults mailing list}. | |
05253aed JJ |
2668 | Some of these archived results are linked from the build status lists |
2669 | at @uref{http://gcc.gnu.org/buildstat.html}, although not everyone who | |
2670 | reports a successful build runs the testsuites and submits the results. | |
f97903cc JJ |
2671 | This step is optional and may require you to download additional software, |
2672 | but it can give you confidence in your new GCC installation or point out | |
8a36672b | 2673 | problems before you install and start using your new GCC@. |
f42974dc | 2674 | |
f9047ed3 | 2675 | First, you must have @uref{download.html,,downloaded the testsuites}. |
f97903cc JJ |
2676 | These are part of the full distribution, but if you downloaded the |
2677 | ``core'' compiler plus any front ends, you must download the testsuites | |
2678 | separately. | |
f42974dc | 2679 | |
f97903cc | 2680 | Second, you must have the testing tools installed. This includes |
80521187 | 2681 | @uref{http://www.gnu.org/software/dejagnu/,,DejaGnu}, Tcl, and Expect; |
5fd1486c PJ |
2682 | the DejaGnu site has links to these. For running the BRIG frontend |
2683 | tests, a tool to assemble the binary BRIGs from HSAIL text, | |
2684 | @uref{https://github.com/HSAFoundation/HSAIL-Tools/,,HSAILasm} must | |
2685 | be installed. | |
f42974dc | 2686 | |
8cacda7c GP |
2687 | If the directories where @command{runtest} and @command{expect} were |
2688 | installed are not in the @env{PATH}, you may need to set the following | |
2689 | environment variables appropriately, as in the following example (which | |
2690 | assumes that DejaGnu has been installed under @file{/usr/local}): | |
f42974dc | 2691 | |
3ab51846 | 2692 | @smallexample |
98797784 RW |
2693 | TCL_LIBRARY = /usr/local/share/tcl8.0 |
2694 | DEJAGNULIBS = /usr/local/share/dejagnu | |
3ab51846 | 2695 | @end smallexample |
f42974dc | 2696 | |
8cacda7c | 2697 | (On systems such as Cygwin, these paths are required to be actual |
f42974dc | 2698 | paths, not mounts or links; presumably this is due to some lack of |
8cacda7c | 2699 | portability in the DejaGnu code.) |
ecb7d6b3 | 2700 | |
f42974dc DW |
2701 | |
2702 | Finally, you can run the testsuite (which may take a long time): | |
3ab51846 | 2703 | @smallexample |
98797784 | 2704 | cd @var{objdir}; make -k check |
3ab51846 | 2705 | @end smallexample |
f42974dc | 2706 | |
794aca5d WB |
2707 | This will test various components of GCC, such as compiler |
2708 | front ends and runtime libraries. While running the testsuite, DejaGnu | |
2709 | might emit some harmless messages resembling | |
daf2f129 | 2710 | @samp{WARNING: Couldn't find the global config file.} or |
794aca5d | 2711 | @samp{WARNING: Couldn't find tool init file} that can be ignored. |
06809951 | 2712 | |
82161911 DD |
2713 | If you are testing a cross-compiler, you may want to run the testsuite |
2714 | on a simulator as described at @uref{http://gcc.gnu.org/simtest-howto.html}. | |
2715 | ||
962e6e00 | 2716 | @section How can you run the testsuite on selected tests? |
f42974dc | 2717 | |
794aca5d | 2718 | In order to run sets of tests selectively, there are targets |
6c6b6634 | 2719 | @samp{make check-gcc} and language specific @samp{make check-c}, |
97a2feb6 | 2720 | @samp{make check-c++}, @samp{make check-fortran}, |
6c6b6634 BRF |
2721 | @samp{make check-ada}, @samp{make check-objc}, @samp{make check-obj-c++}, |
2722 | @samp{make check-lto} | |
794aca5d WB |
2723 | in the @file{gcc} subdirectory of the object directory. You can also |
2724 | just run @samp{make check} in a subdirectory of the object directory. | |
2725 | ||
2726 | ||
2727 | A more selective way to just run all @command{gcc} execute tests in the | |
2728 | testsuite is to use | |
f42974dc | 2729 | |
3ab51846 | 2730 | @smallexample |
98797784 | 2731 | make check-gcc RUNTESTFLAGS="execute.exp @var{other-options}" |
3ab51846 | 2732 | @end smallexample |
f42974dc | 2733 | |
794aca5d WB |
2734 | Likewise, in order to run only the @command{g++} ``old-deja'' tests in |
2735 | the testsuite with filenames matching @samp{9805*}, you would use | |
f42974dc | 2736 | |
3ab51846 | 2737 | @smallexample |
98797784 | 2738 | make check-g++ RUNTESTFLAGS="old-deja.exp=9805* @var{other-options}" |
3ab51846 | 2739 | @end smallexample |
f42974dc | 2740 | |
d35bcdd4 DS |
2741 | The file-matching expression following @var{filename}@command{.exp=} is treated |
2742 | as a series of whitespace-delimited glob expressions so that multiple patterns | |
2743 | may be passed, although any whitespace must either be escaped or surrounded by | |
2744 | single quotes if multiple expressions are desired. For example, | |
2745 | ||
2746 | @smallexample | |
2747 | make check-g++ RUNTESTFLAGS="old-deja.exp=9805*\ virtual2.c @var{other-options}" | |
2748 | make check-g++ RUNTESTFLAGS="'old-deja.exp=9805* virtual2.c' @var{other-options}" | |
2749 | @end smallexample | |
2750 | ||
6cfb3f16 JM |
2751 | The @file{*.exp} files are located in the testsuite directories of the GCC |
2752 | source, the most important ones being @file{compile.exp}, | |
2753 | @file{execute.exp}, @file{dg.exp} and @file{old-deja.exp}. | |
2754 | To get a list of the possible @file{*.exp} files, pipe the | |
38209993 | 2755 | output of @samp{make check} into a file and look at the |
6cfb3f16 | 2756 | @samp{Running @dots{} .exp} lines. |
f42974dc | 2757 | |
e08737dc PE |
2758 | @section Passing options and running multiple testsuites |
2759 | ||
2760 | You can pass multiple options to the testsuite using the | |
2761 | @samp{--target_board} option of DejaGNU, either passed as part of | |
2762 | @samp{RUNTESTFLAGS}, or directly to @command{runtest} if you prefer to | |
2763 | work outside the makefiles. For example, | |
2764 | ||
3ab51846 | 2765 | @smallexample |
98797784 | 2766 | make check-g++ RUNTESTFLAGS="--target_board=unix/-O3/-fmerge-constants" |
3ab51846 | 2767 | @end smallexample |
e08737dc PE |
2768 | |
2769 | will run the standard @command{g++} testsuites (``unix'' is the target name | |
2770 | for a standard native testsuite situation), passing | |
311c6da4 | 2771 | @samp{-O3 -fmerge-constants} to the compiler on every test, i.e., |
e08737dc PE |
2772 | slashes separate options. |
2773 | ||
2774 | You can run the testsuites multiple times using combinations of options | |
2775 | with a syntax similar to the brace expansion of popular shells: | |
2776 | ||
3ab51846 | 2777 | @smallexample |
98797784 | 2778 | @dots{}"--target_board=arm-sim\@{-mhard-float,-msoft-float\@}\@{-O1,-O2,-O3,\@}" |
3ab51846 | 2779 | @end smallexample |
e08737dc PE |
2780 | |
2781 | (Note the empty option caused by the trailing comma in the final group.) | |
2782 | The following will run each testsuite eight times using the @samp{arm-sim} | |
2783 | target, as if you had specified all possible combinations yourself: | |
2784 | ||
3ab51846 | 2785 | @smallexample |
5f11ec71 SE |
2786 | --target_board='arm-sim/-mhard-float/-O1 \ |
2787 | arm-sim/-mhard-float/-O2 \ | |
2788 | arm-sim/-mhard-float/-O3 \ | |
2789 | arm-sim/-mhard-float \ | |
2790 | arm-sim/-msoft-float/-O1 \ | |
2791 | arm-sim/-msoft-float/-O2 \ | |
2792 | arm-sim/-msoft-float/-O3 \ | |
2793 | arm-sim/-msoft-float' | |
3ab51846 | 2794 | @end smallexample |
e08737dc PE |
2795 | |
2796 | They can be combined as many times as you wish, in arbitrary ways. This | |
2797 | list: | |
2798 | ||
3ab51846 | 2799 | @smallexample |
98797784 | 2800 | @dots{}"--target_board=unix/-Wextra\@{-O3,-fno-strength\@}\@{-fomit-frame,\@}" |
3ab51846 | 2801 | @end smallexample |
e08737dc PE |
2802 | |
2803 | will generate four combinations, all involving @samp{-Wextra}. | |
2804 | ||
2805 | The disadvantage to this method is that the testsuites are run in serial, | |
2806 | which is a waste on multiprocessor systems. For users with GNU Make and | |
2807 | a shell which performs brace expansion, you can run the testsuites in | |
2808 | parallel by having the shell perform the combinations and @command{make} | |
2809 | do the parallel runs. Instead of using @samp{--target_board}, use a | |
2810 | special makefile target: | |
2811 | ||
3ab51846 | 2812 | @smallexample |
98797784 | 2813 | make -j@var{N} check-@var{testsuite}//@var{test-target}/@var{option1}/@var{option2}/@dots{} |
3ab51846 | 2814 | @end smallexample |
e08737dc PE |
2815 | |
2816 | For example, | |
2817 | ||
3ab51846 | 2818 | @smallexample |
98797784 | 2819 | make -j3 check-gcc//sh-hms-sim/@{-m1,-m2,-m3,-m3e,-m4@}/@{,-nofpu@} |
3ab51846 | 2820 | @end smallexample |
e08737dc PE |
2821 | |
2822 | will run three concurrent ``make-gcc'' testsuites, eventually testing all | |
2823 | ten combinations as described above. Note that this is currently only | |
2824 | supported in the @file{gcc} subdirectory. (To see how this works, try | |
2825 | typing @command{echo} before the example given here.) | |
2826 | ||
2827 | ||
f42974dc DW |
2828 | @section How to interpret test results |
2829 | ||
794aca5d | 2830 | The result of running the testsuite are various @file{*.sum} and @file{*.log} |
767094dd | 2831 | files in the testsuite subdirectories. The @file{*.log} files contain a |
f42974dc | 2832 | detailed log of the compiler invocations and the corresponding |
daf2f129 JM |
2833 | results, the @file{*.sum} files summarize the results. These summaries |
2834 | contain status codes for all tests: | |
f42974dc DW |
2835 | |
2836 | @itemize @bullet | |
2837 | @item | |
2838 | PASS: the test passed as expected | |
2839 | @item | |
2840 | XPASS: the test unexpectedly passed | |
2841 | @item | |
2842 | FAIL: the test unexpectedly failed | |
2843 | @item | |
2844 | XFAIL: the test failed as expected | |
2845 | @item | |
2846 | UNSUPPORTED: the test is not supported on this platform | |
2847 | @item | |
2848 | ERROR: the testsuite detected an error | |
2849 | @item | |
2850 | WARNING: the testsuite detected a possible problem | |
2851 | @end itemize | |
2852 | ||
38209993 | 2853 | It is normal for some tests to report unexpected failures. At the |
962e6e00 JM |
2854 | current time the testing harness does not allow fine grained control |
2855 | over whether or not a test is expected to fail. This problem should | |
2856 | be fixed in future releases. | |
f42974dc DW |
2857 | |
2858 | ||
2859 | @section Submitting test results | |
2860 | ||
2861 | If you want to report the results to the GCC project, use the | |
767094dd | 2862 | @file{contrib/test_summary} shell script. Start it in the @var{objdir} with |
f42974dc | 2863 | |
3ab51846 | 2864 | @smallexample |
98797784 RW |
2865 | @var{srcdir}/contrib/test_summary -p your_commentary.txt \ |
2866 | -m gcc-testresults@@gcc.gnu.org |sh | |
3ab51846 | 2867 | @end smallexample |
f42974dc | 2868 | |
6cfb3f16 | 2869 | This script uses the @command{Mail} program to send the results, so |
767094dd | 2870 | make sure it is in your @env{PATH}. The file @file{your_commentary.txt} is |
f42974dc | 2871 | prepended to the testsuite summary and should contain any special |
767094dd | 2872 | remarks you have on your results or your build environment. Please |
f42974dc | 2873 | do not edit the testsuite result block or the subject line, as these |
05c425a9 | 2874 | messages may be automatically processed. |
f42974dc | 2875 | |
aed5964b | 2876 | @html |
b8db17af | 2877 | <hr /> |
aed5964b JM |
2878 | <p> |
2879 | @end html | |
2880 | @ifhtml | |
2881 | @uref{./index.html,,Return to the GCC Installation page} | |
2882 | @end ifhtml | |
f42974dc DW |
2883 | @end ifset |
2884 | ||
2885 | @c ***Final install*********************************************************** | |
6cfb3f16 | 2886 | @ifnothtml |
f42974dc DW |
2887 | @comment node-name, next, previous, up |
2888 | @node Final install, , Testing, Installing GCC | |
6cfb3f16 | 2889 | @end ifnothtml |
f42974dc | 2890 | @ifset finalinstallhtml |
f42974dc DW |
2891 | @ifnothtml |
2892 | @chapter Installing GCC: Final installation | |
2893 | @end ifnothtml | |
2894 | ||
eea81d3e | 2895 | Now that GCC has been built (and optionally tested), you can install it with |
3ab51846 | 2896 | @smallexample |
455c8f48 | 2897 | cd @var{objdir} && make install |
3ab51846 | 2898 | @end smallexample |
f42974dc | 2899 | |
06809951 | 2900 | We strongly recommend to install into a target directory where there is |
4b322f43 JB |
2901 | no previous version of GCC present. Also, the GNAT runtime should not |
2902 | be stripped, as this would break certain features of the debugger that | |
2903 | depend on this debugging information (catching Ada exceptions for | |
2904 | instance). | |
06809951 | 2905 | |
f42974dc | 2906 | That step completes the installation of GCC; user level binaries can |
8e5f33ff GK |
2907 | be found in @file{@var{prefix}/bin} where @var{prefix} is the value |
2908 | you specified with the @option{--prefix} to configure (or | |
2909 | @file{/usr/local} by default). (If you specified @option{--bindir}, | |
2910 | that directory will be used instead; otherwise, if you specified | |
2911 | @option{--exec-prefix}, @file{@var{exec-prefix}/bin} will be used.) | |
97a2feb6 | 2912 | Headers for the C++ library are installed in |
8e5f33ff GK |
2913 | @file{@var{prefix}/include}; libraries in @file{@var{libdir}} |
2914 | (normally @file{@var{prefix}/lib}); internal parts of the compiler in | |
2915 | @file{@var{libdir}/gcc} and @file{@var{libexecdir}/gcc}; documentation | |
2916 | in info format in @file{@var{infodir}} (normally | |
2917 | @file{@var{prefix}/info}). | |
f42974dc | 2918 | |
53b50ac1 CC |
2919 | When installing cross-compilers, GCC's executables |
2920 | are not only installed into @file{@var{bindir}}, that | |
2921 | is, @file{@var{exec-prefix}/bin}, but additionally into | |
2922 | @file{@var{exec-prefix}/@var{target-alias}/bin}, if that directory | |
2923 | exists. Typically, such @dfn{tooldirs} hold target-specific | |
2924 | binutils, including assembler and linker. | |
2925 | ||
2926 | Installation into a temporary staging area or into a @command{chroot} | |
2927 | jail can be achieved with the command | |
2928 | ||
3ab51846 | 2929 | @smallexample |
53b50ac1 | 2930 | make DESTDIR=@var{path-to-rootdir} install |
3ab51846 | 2931 | @end smallexample |
53b50ac1 | 2932 | |
455c8f48 RW |
2933 | @noindent |
2934 | where @var{path-to-rootdir} is the absolute path of | |
53b50ac1 CC |
2935 | a directory relative to which all installation paths will be |
2936 | interpreted. Note that the directory specified by @code{DESTDIR} | |
2937 | need not exist yet; it will be created if necessary. | |
2938 | ||
2939 | There is a subtle point with tooldirs and @code{DESTDIR}: | |
2940 | If you relocate a cross-compiler installation with | |
2941 | e.g.@: @samp{DESTDIR=@var{rootdir}}, then the directory | |
2942 | @file{@var{rootdir}/@var{exec-prefix}/@var{target-alias}/bin} will | |
2943 | be filled with duplicated GCC executables only if it already exists, | |
2944 | it will not be created otherwise. This is regarded as a feature, | |
2945 | not as a bug, because it gives slightly more control to the packagers | |
2946 | using the @code{DESTDIR} feature. | |
2947 | ||
455c8f48 RW |
2948 | You can install stripped programs and libraries with |
2949 | ||
2950 | @smallexample | |
2951 | make install-strip | |
2952 | @end smallexample | |
2953 | ||
cc11cc9b | 2954 | If you are bootstrapping a released version of GCC then please |
f97a5bda JJ |
2955 | quickly review the build status page for your release, available from |
2956 | @uref{http://gcc.gnu.org/buildstat.html}. | |
c5997381 JJ |
2957 | If your system is not listed for the version of GCC that you built, |
2958 | send a note to | |
eea81d3e | 2959 | @email{gcc@@gcc.gnu.org} indicating |
8a36672b | 2960 | that you successfully built and installed GCC@. |
c5997381 | 2961 | Include the following information: |
f42974dc | 2962 | |
c5997381 JJ |
2963 | @itemize @bullet |
2964 | @item | |
962e6e00 | 2965 | Output from running @file{@var{srcdir}/config.guess}. Do not send |
c5997381 JJ |
2966 | that file itself, just the one-line output from running it. |
2967 | ||
2968 | @item | |
2dd76960 | 2969 | The output of @samp{gcc -v} for your newly installed @command{gcc}. |
c5997381 JJ |
2970 | This tells us which version of GCC you built and the options you passed to |
2971 | configure. | |
2972 | ||
2b46bc67 JJ |
2973 | @item |
2974 | Whether you enabled all languages or a subset of them. If you used a | |
2975 | full distribution then this information is part of the configure | |
2976 | options in the output of @samp{gcc -v}, but if you downloaded the | |
2977 | ``core'' compiler plus additional front ends then it isn't apparent | |
2978 | which ones you built unless you tell us about it. | |
2979 | ||
c5997381 JJ |
2980 | @item |
2981 | If the build was for GNU/Linux, also include: | |
2982 | @itemize @bullet | |
2983 | @item | |
2984 | The distribution name and version (e.g., Red Hat 7.1 or Debian 2.2.3); | |
2985 | this information should be available from @file{/etc/issue}. | |
2986 | ||
2987 | @item | |
2988 | The version of the Linux kernel, available from @samp{uname --version} | |
2989 | or @samp{uname -a}. | |
2990 | ||
2991 | @item | |
2992 | The version of glibc you used; for RPM-based systems like Red Hat, | |
b9da07da JJ |
2993 | Mandrake, and SuSE type @samp{rpm -q glibc} to get the glibc version, |
2994 | and on systems like Debian and Progeny use @samp{dpkg -l libc6}. | |
c5997381 JJ |
2995 | @end itemize |
2996 | For other systems, you can include similar information if you think it is | |
2997 | relevant. | |
2998 | ||
2999 | @item | |
3000 | Any other information that you think would be useful to people building | |
3001 | GCC on the same configuration. The new entry in the build status list | |
3002 | will include a link to the archived copy of your message. | |
3003 | @end itemize | |
c009f01f JJ |
3004 | |
3005 | We'd also like to know if the | |
3006 | @ifnothtml | |
3007 | @ref{Specific, host/target specific installation notes} | |
3008 | @end ifnothtml | |
3009 | @ifhtml | |
3010 | @uref{specific.html,,host/target specific installation notes} | |
3011 | @end ifhtml | |
3012 | didn't include your host/target information or if that information is | |
3013 | incomplete or out of date. Send a note to | |
962e6e00 | 3014 | @email{gcc@@gcc.gnu.org} detailing how the information should be changed. |
f42974dc | 3015 | |
962e6e00 | 3016 | If you find a bug, please report it following the |
c08766bc | 3017 | @uref{../bugs/,,bug reporting guidelines}. |
f42974dc | 3018 | |
ab130aa5 | 3019 | If you want to print the GCC manuals, do @samp{cd @var{objdir}; make |
7326a39e | 3020 | dvi}. You will need to have @command{texi2dvi} (version at least 4.7) |
ab130aa5 JM |
3021 | and @TeX{} installed. This creates a number of @file{.dvi} files in |
3022 | subdirectories of @file{@var{objdir}}; these may be converted for | |
cc5c2741 BM |
3023 | printing with programs such as @command{dvips}. Alternately, by using |
3024 | @samp{make pdf} in place of @samp{make dvi}, you can create documentation | |
3025 | in the form of @file{.pdf} files; this requires @command{texi2pdf}, which | |
3026 | is included with Texinfo version 4.8 and later. You can also | |
545808ee | 3027 | @uref{https://shop.fsf.org/,,buy printed manuals from the |
ab130aa5 | 3028 | Free Software Foundation}, though such manuals may not be for the most |
161d7b59 | 3029 | recent version of GCC@. |
ab130aa5 | 3030 | |
9d65c5cb | 3031 | If you would like to generate online HTML documentation, do @samp{cd |
f995c51f JW |
3032 | @var{objdir}; make html} and HTML will be generated for the gcc manuals in |
3033 | @file{@var{objdir}/gcc/HTML}. | |
9d65c5cb | 3034 | |
f42974dc | 3035 | @html |
b8db17af | 3036 | <hr /> |
f42974dc DW |
3037 | <p> |
3038 | @end html | |
3039 | @ifhtml | |
3040 | @uref{./index.html,,Return to the GCC Installation page} | |
3041 | @end ifhtml | |
3042 | @end ifset | |
3043 | ||
3044 | @c ***Binaries**************************************************************** | |
6cfb3f16 | 3045 | @ifnothtml |
f42974dc DW |
3046 | @comment node-name, next, previous, up |
3047 | @node Binaries, Specific, Installing GCC, Top | |
6cfb3f16 | 3048 | @end ifnothtml |
f42974dc | 3049 | @ifset binarieshtml |
f42974dc DW |
3050 | @ifnothtml |
3051 | @chapter Installing GCC: Binaries | |
3052 | @end ifnothtml | |
3053 | @cindex Binaries | |
3054 | @cindex Installing GCC: Binaries | |
3055 | ||
161d7b59 | 3056 | We are often asked about pre-compiled versions of GCC@. While we cannot |
f42974dc DW |
3057 | provide these for all platforms, below you'll find links to binaries for |
3058 | various platforms where creating them by yourself is not easy due to various | |
3059 | reasons. | |
3060 | ||
3061 | Please note that we did not create these binaries, nor do we | |
3062 | support them. If you have any problems installing them, please | |
3063 | contact their makers. | |
3064 | ||
3065 | @itemize | |
3066 | @item | |
df002c7d DE |
3067 | AIX: |
3068 | @itemize | |
3069 | @item | |
50b43b86 FXC |
3070 | @uref{http://www.bullfreeware.com,,Bull's Open Source Software Archive for |
3071 | for AIX 5L and AIX 6}; | |
df002c7d DE |
3072 | |
3073 | @item | |
50b43b86 FXC |
3074 | @uref{http://www.perzl.org/aix/,,AIX Open Source Packages (AIX5L AIX 6.1 |
3075 | AIX 7.1)}. | |
df002c7d | 3076 | @end itemize |
f42974dc DW |
3077 | |
3078 | @item | |
8d5362b7 GP |
3079 | DOS---@uref{http://www.delorie.com/djgpp/,,DJGPP}. |
3080 | ||
f404402c MW |
3081 | @item |
3082 | HP-UX: | |
3083 | @itemize | |
f42974dc | 3084 | @item |
58735e03 | 3085 | @uref{http://hpux.connect.org.uk/,,HP-UX Porting Center}; |
f404402c MW |
3086 | @end itemize |
3087 | ||
8d5362b7 | 3088 | @item |
58735e03 TC |
3089 | Solaris 2 (SPARC, Intel): |
3090 | @itemize | |
58735e03 | 3091 | @item |
845d9d1a | 3092 | @uref{https://www.opencsw.org/,,OpenCSW} |
58735e03 TC |
3093 | |
3094 | @item | |
3095 | @uref{http://jupiterrise.com/tgcware/,,TGCware} | |
3096 | @end itemize | |
f42974dc | 3097 | |
30329066 FXC |
3098 | @item |
3099 | macOS: | |
3100 | @itemize | |
3101 | @item | |
3102 | The @uref{https://brew.sh,,Homebrew} package manager; | |
3103 | @item | |
3104 | @uref{https://www.macports.org,,MacPorts}. | |
3105 | @end itemize | |
3106 | ||
f42974dc | 3107 | @item |
05c425a9 | 3108 | Microsoft Windows: |
f42974dc DW |
3109 | @itemize |
3110 | @item | |
2139a88a | 3111 | The @uref{https://sourceware.org/cygwin/,,Cygwin} project; |
f42974dc | 3112 | @item |
50b43b86 | 3113 | The @uref{http://www.mingw.org/,,MinGW} and |
67afc9a6 | 3114 | @uref{http://mingw-w64.org/doku.php,,mingw-w64} projects. |
f42974dc DW |
3115 | @end itemize |
3116 | ||
6512c54a GP |
3117 | @item |
3118 | @uref{http://www.openpkg.org/,,OpenPKG} offers binaries for quite a | |
3119 | number of platforms. | |
eae50c87 PB |
3120 | |
3121 | @item | |
3122 | The @uref{http://gcc.gnu.org/wiki/GFortranBinaries,,GFortran Wiki} has | |
92922512 | 3123 | links to GNU Fortran binaries for several platforms. |
f42974dc DW |
3124 | @end itemize |
3125 | ||
f42974dc | 3126 | @html |
b8db17af | 3127 | <hr /> |
f42974dc DW |
3128 | <p> |
3129 | @end html | |
3130 | @ifhtml | |
3131 | @uref{./index.html,,Return to the GCC Installation page} | |
3132 | @end ifhtml | |
3133 | @end ifset | |
3134 | ||
3135 | @c ***Specific**************************************************************** | |
6cfb3f16 | 3136 | @ifnothtml |
f42974dc | 3137 | @comment node-name, next, previous, up |
73e2155a | 3138 | @node Specific, Old, Binaries, Top |
6cfb3f16 | 3139 | @end ifnothtml |
f42974dc | 3140 | @ifset specifichtml |
f42974dc DW |
3141 | @ifnothtml |
3142 | @chapter Host/target specific installation notes for GCC | |
3143 | @end ifnothtml | |
3144 | @cindex Specific | |
3145 | @cindex Specific installation notes | |
3146 | @cindex Target specific installation | |
3147 | @cindex Host specific installation | |
3148 | @cindex Target specific installation notes | |
3149 | ||
3150 | Please read this document carefully @emph{before} installing the | |
3151 | GNU Compiler Collection on your machine. | |
3152 | ||
c9936427 DD |
3153 | Note that this list of install notes is @emph{not} a list of supported |
3154 | hosts or targets. Not all supported hosts and targets are listed | |
3155 | here, only the ones that require host-specific or target-specific | |
a66217a0 | 3156 | information have to. |
c9936427 | 3157 | |
ef88b07d | 3158 | @ifhtml |
f42974dc DW |
3159 | @itemize |
3160 | @item | |
4fb1c8f9 JG |
3161 | @uref{#aarch64-x-x,,aarch64*-*-*} |
3162 | @item | |
5a4c9b10 | 3163 | @uref{#alpha-x-x,,alpha*-*-*} |
f42974dc | 3164 | @item |
fbdd5d87 RO |
3165 | @uref{#amd64-x-solaris210,,amd64-*-solaris2.10} |
3166 | @item | |
9094e001 | 3167 | @uref{#arm-x-eabi,,arm-*-eabi} |
b8df899a | 3168 | @item |
f42974dc DW |
3169 | @uref{#avr,,avr} |
3170 | @item | |
0d4a78eb BS |
3171 | @uref{#bfin,,Blackfin} |
3172 | @item | |
f42974dc DW |
3173 | @uref{#dos,,DOS} |
3174 | @item | |
5a4c9b10 | 3175 | @uref{#x-x-freebsd,,*-*-freebsd*} |
021c4bfd | 3176 | @item |
f42974dc DW |
3177 | @uref{#h8300-hms,,h8300-hms} |
3178 | @item | |
5a4c9b10 | 3179 | @uref{#hppa-hp-hpux,,hppa*-hp-hpux*} |
f42974dc | 3180 | @item |
5a4c9b10 | 3181 | @uref{#hppa-hp-hpux10,,hppa*-hp-hpux10} |
f42974dc | 3182 | @item |
5a4c9b10 | 3183 | @uref{#hppa-hp-hpux11,,hppa*-hp-hpux11} |
f42974dc | 3184 | @item |
5a4c9b10 | 3185 | @uref{#x-x-linux-gnu,,*-*-linux-gnu} |
f42974dc | 3186 | @item |
5a4c9b10 | 3187 | @uref{#ix86-x-linux,,i?86-*-linux*} |
f42974dc | 3188 | @item |
d8fcd085 | 3189 | @uref{#ix86-x-solaris210,,i?86-*-solaris2.10} |
8f47c084 | 3190 | @item |
5a4c9b10 | 3191 | @uref{#ia64-x-linux,,ia64-*-linux} |
b8df899a | 3192 | @item |
5a4c9b10 | 3193 | @uref{#ia64-x-hpux,,ia64-*-hpux*} |
b499d9ab | 3194 | @item |
5a4c9b10 | 3195 | @uref{#x-ibm-aix,,*-ibm-aix*} |
959a73a4 | 3196 | @item |
5a4c9b10 | 3197 | @uref{#iq2000-x-elf,,iq2000-*-elf} |
e3223ea2 | 3198 | @item |
aa4945c1 JB |
3199 | @uref{#lm32-x-elf,,lm32-*-elf} |
3200 | @item | |
3201 | @uref{#lm32-x-uclinux,,lm32-*-uclinux} | |
3202 | @item | |
38b2d076 DD |
3203 | @uref{#m32c-x-elf,,m32c-*-elf} |
3204 | @item | |
5a4c9b10 | 3205 | @uref{#m32r-x-elf,,m32r-*-elf} |
b8df899a | 3206 | @item |
183dc04b RS |
3207 | @uref{#m68k-x-x,,m68k-*-*} |
3208 | @item | |
4529dbf1 RS |
3209 | @uref{#m68k-uclinux,,m68k-uclinux} |
3210 | @item | |
80920132 ME |
3211 | @uref{#microblaze-x-elf,,microblaze-*-elf} |
3212 | @item | |
5a4c9b10 | 3213 | @uref{#mips-x-x,,mips-*-*} |
b8df899a | 3214 | @item |
d4fbc3ae CJW |
3215 | @uref{#nds32le-x-elf,,nds32le-*-elf} |
3216 | @item | |
3217 | @uref{#nds32be-x-elf,,nds32be-*-elf} | |
3218 | @item | |
d7705288 TS |
3219 | @uref{#nvptx-x-none,,nvptx-*-none} |
3220 | @item | |
cd985f66 | 3221 | @uref{#powerpc-x-x,,powerpc*-*-*} |
4f2b1139 | 3222 | @item |
5a4c9b10 | 3223 | @uref{#powerpc-x-darwin,,powerpc-*-darwin*} |
b8df899a | 3224 | @item |
cd985f66 | 3225 | @uref{#powerpc-x-elf,,powerpc-*-elf} |
f42974dc | 3226 | @item |
5a4c9b10 | 3227 | @uref{#powerpc-x-linux-gnu,,powerpc*-*-linux-gnu*} |
edf1b3f3 | 3228 | @item |
5a4c9b10 | 3229 | @uref{#powerpc-x-netbsd,,powerpc-*-netbsd*} |
b8df899a | 3230 | @item |
5a4c9b10 | 3231 | @uref{#powerpc-x-eabisim,,powerpc-*-eabisim} |
b8df899a | 3232 | @item |
5a4c9b10 | 3233 | @uref{#powerpc-x-eabi,,powerpc-*-eabi} |
b8df899a | 3234 | @item |
cd985f66 | 3235 | @uref{#powerpcle-x-elf,,powerpcle-*-elf} |
b8df899a | 3236 | @item |
5a4c9b10 | 3237 | @uref{#powerpcle-x-eabisim,,powerpcle-*-eabisim} |
b8df899a | 3238 | @item |
5a4c9b10 | 3239 | @uref{#powerpcle-x-eabi,,powerpcle-*-eabi} |
b8df899a | 3240 | @item |
3b82a32c PD |
3241 | @uref{#riscv32-x-elf,,riscv32-*-elf} |
3242 | @item | |
3243 | @uref{#riscv32-x-linux,,riscv32-*-linux} | |
3244 | @item | |
3245 | @uref{#riscv64-x-elf,,riscv64-*-elf} | |
3246 | @item | |
3247 | @uref{#riscv64-x-linux,,riscv64-*-linux} | |
3248 | @item | |
5a4c9b10 | 3249 | @uref{#s390-x-linux,,s390-*-linux*} |
91abf72d | 3250 | @item |
5a4c9b10 | 3251 | @uref{#s390x-x-linux,,s390x-*-linux*} |
91abf72d | 3252 | @item |
5a4c9b10 | 3253 | @uref{#s390x-ibm-tpf,,s390x-ibm-tpf*} |
8bf06993 | 3254 | @item |
5a4c9b10 | 3255 | @uref{#x-x-solaris2,,*-*-solaris2*} |
f42974dc | 3256 | @item |
d191cd06 EB |
3257 | @uref{#sparc-x-x,,sparc*-*-*} |
3258 | @item | |
5a4c9b10 | 3259 | @uref{#sparc-sun-solaris2,,sparc-sun-solaris2*} |
f42974dc | 3260 | @item |
cb717ac4 RO |
3261 | @uref{#sparc-sun-solaris210,,sparc-sun-solaris2.10} |
3262 | @item | |
5a4c9b10 | 3263 | @uref{#sparc-x-linux,,sparc-*-linux*} |
c6fa9728 | 3264 | @item |
5a4c9b10 | 3265 | @uref{#sparc64-x-solaris2,,sparc64-*-solaris2*} |
f42974dc | 3266 | @item |
5a4c9b10 | 3267 | @uref{#sparcv9-x-solaris2,,sparcv9-*-solaris2*} |
e403b4bc | 3268 | @item |
bcead286 BS |
3269 | @uref{#c6x-x-x,,c6x-*-*} |
3270 | @item | |
dd552284 WL |
3271 | @uref{#tilegx-x-linux,,tilegx-*-linux*} |
3272 | @item | |
341c653c WL |
3273 | @uref{#tilegxbe-x-linux,,tilegxbe-*-linux*} |
3274 | @item | |
dd552284 WL |
3275 | @uref{#tilepro-x-linux,,tilepro-*-linux*} |
3276 | @item | |
0969ec7d EB |
3277 | @uref{#visium-x-elf, visium-*-elf} |
3278 | @item | |
5a4c9b10 | 3279 | @uref{#x-x-vxworks,,*-*-vxworks*} |
4977bab6 | 3280 | @item |
d8fcd085 | 3281 | @uref{#x86-64-x-x,,x86_64-*-*, amd64-*-*} |
7e081a0c | 3282 | @item |
fbdd5d87 RO |
3283 | @uref{#x86-64-x-solaris210,,x86_64-*-solaris2.1[0-9]*} |
3284 | @item | |
6d656178 | 3285 | @uref{#xtensa-x-elf,,xtensa*-*-elf} |
fd29f6ea | 3286 | @item |
6d656178 | 3287 | @uref{#xtensa-x-linux,,xtensa*-*-linux*} |
fd29f6ea | 3288 | @item |
f42974dc DW |
3289 | @uref{#windows,,Microsoft Windows} |
3290 | @item | |
aad416fb AL |
3291 | @uref{#x-x-cygwin,,*-*-cygwin} |
3292 | @item | |
53e350d3 | 3293 | @uref{#x-x-mingw32,,*-*-mingw32} |
aad416fb | 3294 | @item |
f42974dc DW |
3295 | @uref{#os2,,OS/2} |
3296 | @item | |
3297 | @uref{#older,,Older systems} | |
3298 | @end itemize | |
3299 | ||
3300 | @itemize | |
3301 | @item | |
d8fcd085 | 3302 | @uref{#elf,,all ELF targets} (SVR4, Solaris 2, etc.) |
f42974dc | 3303 | @end itemize |
ef88b07d | 3304 | @end ifhtml |
f42974dc DW |
3305 | |
3306 | ||
3307 | @html | |
3308 | <!-- -------- host/target specific issues start here ---------------- --> | |
b8db17af | 3309 | <hr /> |
f42974dc | 3310 | @end html |
4fb1c8f9 JG |
3311 | @anchor{aarch64-x-x} |
3312 | @heading aarch64*-*-* | |
3313 | Binutils pre 2.24 does not have support for selecting @option{-mabi} and | |
3314 | does not support ILP32. If it is used to build GCC 4.9 or later, GCC will | |
3315 | not support option @option{-mabi=ilp32}. | |
3316 | ||
3317 | To enable a workaround for the Cortex-A53 erratum number 835769 by default | |
3318 | (for all CPUs regardless of -mcpu option given) at configure time use the | |
3319 | @option{--enable-fix-cortex-a53-835769} option. This will enable the fix by | |
bf05ef76 | 3320 | default and can be explicitly disabled during compilation by passing the |
4fb1c8f9 JG |
3321 | @option{-mno-fix-cortex-a53-835769} option. Conversely, |
3322 | @option{--disable-fix-cortex-a53-835769} will disable the workaround by | |
3323 | default. The workaround is disabled by default if neither of | |
3324 | @option{--enable-fix-cortex-a53-835769} or | |
3325 | @option{--disable-fix-cortex-a53-835769} is given at configure time. | |
3326 | ||
bf05ef76 YR |
3327 | To enable a workaround for the Cortex-A53 erratum number 843419 by default |
3328 | (for all CPUs regardless of -mcpu option given) at configure time use the | |
3329 | @option{--enable-fix-cortex-a53-843419} option. This workaround is applied at | |
3330 | link time. Enabling the workaround will cause GCC to pass the relevant option | |
3331 | to the linker. It can be explicitly disabled during compilation by passing the | |
3332 | @option{-mno-fix-cortex-a53-843419} option. Conversely, | |
3333 | @option{--disable-fix-cortex-a53-843419} will disable the workaround by default. | |
3334 | The workaround is disabled by default if neither of | |
3335 | @option{--enable-fix-cortex-a53-843419} or | |
3336 | @option{--disable-fix-cortex-a53-843419} is given at configure time. | |
3337 | ||
4fb1c8f9 JG |
3338 | @html |
3339 | <hr /> | |
3340 | @end html | |
e2ebe1c2 UB |
3341 | @anchor{alpha-x-x} |
3342 | @heading alpha*-*-* | |
333e14b0 | 3343 | This section contains general configuration information for all |
863db6b6 | 3344 | Alpha-based platforms using ELF@. In addition to reading this |
f2541106 | 3345 | section, please read all other sections that match your target. |
333e14b0 | 3346 | |
13be44ed UB |
3347 | We require binutils 2.11.2 or newer. |
3348 | Previous binutils releases had a number of problems with DWARF 2 | |
3349 | debugging information, not the least of which is incorrect linking of | |
3350 | shared libraries. | |
333e14b0 | 3351 | |
fbdd5d87 RO |
3352 | @html |
3353 | <hr /> | |
3354 | @end html | |
e2ebe1c2 UB |
3355 | @anchor{amd64-x-solaris210} |
3356 | @heading amd64-*-solaris2.1[0-9]* | |
fbdd5d87 RO |
3357 | This is a synonym for @samp{x86_64-*-solaris2.1[0-9]*}. |
3358 | ||
5d5f6720 JR |
3359 | @html |
3360 | <hr /> | |
3361 | @end html | |
3362 | @anchor{arc-x-elf32} | |
3363 | @heading arc-*-elf32 | |
3364 | ||
3365 | Use @samp{configure --target=arc-elf32 --with-cpu=@var{cpu} --enable-languages="c,c++"} | |
3366 | to configure GCC, with @var{cpu} being one of @samp{arc600}, @samp{arc601}, | |
3367 | or @samp{arc700}@. | |
3368 | ||
3369 | @html | |
3370 | <hr /> | |
3371 | @end html | |
3372 | @anchor{arc-linux-uclibc} | |
3373 | @heading arc-linux-uclibc | |
3374 | ||
3375 | Use @samp{configure --target=arc-linux-uclibc --with-cpu=arc700 --enable-languages="c,c++"} to configure GCC@. | |
3376 | ||
b8df899a | 3377 | @html |
b8db17af | 3378 | <hr /> |
b8df899a | 3379 | @end html |
e2ebe1c2 UB |
3380 | @anchor{arm-x-eabi} |
3381 | @heading arm-*-eabi | |
251daa19 | 3382 | ARM-family processors. |
34e8290f | 3383 | |
2f7693bf AL |
3384 | Building the Ada frontend commonly fails (an infinite loop executing |
3385 | @code{xsinfo}) if the host compiler is GNAT 4.8. Host compilers built from the | |
3386 | GNAT 4.6, 4.9 or 5 release branches are known to succeed. | |
3387 | ||
f42974dc | 3388 | @html |
b8db17af | 3389 | <hr /> |
f42974dc | 3390 | @end html |
e2ebe1c2 UB |
3391 | @anchor{avr} |
3392 | @heading avr | |
b8df899a | 3393 | ATMEL AVR-family micro controllers. These are used in embedded |
ca52d046 GP |
3394 | applications. There are no standard Unix configurations. |
3395 | @ifnothtml | |
7f970b70 | 3396 | @xref{AVR Options,, AVR Options, gcc, Using the GNU Compiler |
ca52d046 GP |
3397 | Collection (GCC)}, |
3398 | @end ifnothtml | |
98999d8b | 3399 | @ifhtml |
ca52d046 | 3400 | See ``AVR Options'' in the main manual |
98999d8b | 3401 | @end ifhtml |
ca52d046 | 3402 | for the list of supported MCU types. |
b8df899a | 3403 | |
161d7b59 | 3404 | Use @samp{configure --target=avr --enable-languages="c"} to configure GCC@. |
f42974dc DW |
3405 | |
3406 | Further installation notes and other useful information about AVR tools | |
3407 | can also be obtained from: | |
3408 | ||
3409 | @itemize @bullet | |
3410 | @item | |
1d7887ca | 3411 | @uref{http://www.nongnu.org/avr/,,http://www.nongnu.org/avr/} |
de7999ba | 3412 | @item |
d1a86812 | 3413 | @uref{http://www.amelek.gda.pl/avr/,,http://www.amelek.gda.pl/avr/} |
f42974dc DW |
3414 | @end itemize |
3415 | ||
f42974dc | 3416 | The following error: |
3ab51846 | 3417 | @smallexample |
98797784 | 3418 | Error: register required |
3ab51846 | 3419 | @end smallexample |
f42974dc DW |
3420 | |
3421 | indicates that you should upgrade to a newer version of the binutils. | |
3422 | ||
0d4a78eb BS |
3423 | @html |
3424 | <hr /> | |
3425 | @end html | |
e2ebe1c2 UB |
3426 | @anchor{bfin} |
3427 | @heading Blackfin | |
0d4a78eb BS |
3428 | The Blackfin processor, an Analog Devices DSP. |
3429 | @ifnothtml | |
7f970b70 AM |
3430 | @xref{Blackfin Options,, Blackfin Options, gcc, Using the GNU Compiler |
3431 | Collection (GCC)}, | |
0d4a78eb BS |
3432 | @end ifnothtml |
3433 | @ifhtml | |
3434 | See ``Blackfin Options'' in the main manual | |
3435 | @end ifhtml | |
3436 | ||
3437 | More information, and a version of binutils with support for this processor, | |
67afc9a6 | 3438 | is available at @uref{https://blackfin.uclinux.org} |
0d4a78eb | 3439 | |
b25364a0 S |
3440 | @html |
3441 | <hr /> | |
3442 | @end html | |
e2ebe1c2 UB |
3443 | @anchor{cr16} |
3444 | @heading CR16 | |
3445 | The CR16 CompactRISC architecture is a 16-bit architecture. This | |
3446 | architecture is used in embedded applications. | |
b25364a0 S |
3447 | |
3448 | @ifnothtml | |
3449 | @xref{CR16 Options,, CR16 Options, gcc, Using and Porting the GNU Compiler | |
3450 | Collection (GCC)}, | |
3451 | @end ifnothtml | |
3452 | ||
3453 | @ifhtml | |
3454 | See ``CR16 Options'' in the main manual for a list of CR16-specific options. | |
3455 | @end ifhtml | |
3456 | ||
3457 | Use @samp{configure --target=cr16-elf --enable-languages=c,c++} to configure | |
3458 | GCC@ for building a CR16 elf cross-compiler. | |
3459 | ||
e2ebe1c2 UB |
3460 | Use @samp{configure --target=cr16-uclinux --enable-languages=c,c++} to |
3461 | configure GCC@ for building a CR16 uclinux cross-compiler. | |
b25364a0 | 3462 | |
0b85d816 | 3463 | @html |
b8db17af | 3464 | <hr /> |
0b85d816 | 3465 | @end html |
e2ebe1c2 UB |
3466 | @anchor{cris} |
3467 | @heading CRIS | |
0b85d816 HPN |
3468 | CRIS is the CPU architecture in Axis Communications ETRAX system-on-a-chip |
3469 | series. These are used in embedded applications. | |
3470 | ||
3471 | @ifnothtml | |
7f970b70 | 3472 | @xref{CRIS Options,, CRIS Options, gcc, Using the GNU Compiler |
0b85d816 HPN |
3473 | Collection (GCC)}, |
3474 | @end ifnothtml | |
3475 | @ifhtml | |
3476 | See ``CRIS Options'' in the main manual | |
3477 | @end ifhtml | |
3478 | for a list of CRIS-specific options. | |
3479 | ||
3480 | There are a few different CRIS targets: | |
3481 | @table @code | |
0b85d816 HPN |
3482 | @item cris-axis-elf |
3483 | Mainly for monolithic embedded systems. Includes a multilib for the | |
3484 | @samp{v10} core used in @samp{ETRAX 100 LX}. | |
3485 | @item cris-axis-linux-gnu | |
3486 | A GNU/Linux port for the CRIS architecture, currently targeting | |
3487 | @samp{ETRAX 100 LX} by default. | |
3488 | @end table | |
3489 | ||
0b85d816 | 3490 | Pre-packaged tools can be obtained from |
b7ae9eb5 | 3491 | @uref{ftp://ftp.axis.com/@/pub/@/axis/@/tools/@/cris/@/compiler-kit/}. More |
0b85d816 HPN |
3492 | information about this platform is available at |
3493 | @uref{http://developer.axis.com/}. | |
3494 | ||
f42974dc | 3495 | @html |
b8db17af | 3496 | <hr /> |
f42974dc | 3497 | @end html |
e2ebe1c2 UB |
3498 | @anchor{dos} |
3499 | @heading DOS | |
962e6e00 | 3500 | Please have a look at the @uref{binaries.html,,binaries page}. |
f42974dc | 3501 | |
f0523f02 | 3502 | You cannot install GCC by itself on MSDOS; it will not compile under |
f85b8d1a JM |
3503 | any MSDOS compiler except itself. You need to get the complete |
3504 | compilation package DJGPP, which includes binaries as well as sources, | |
3505 | and includes all the necessary compilation tools and libraries. | |
3506 | ||
feeeff5c JR |
3507 | @html |
3508 | <hr /> | |
3509 | @end html | |
e2ebe1c2 UB |
3510 | @anchor{epiphany-x-elf} |
3511 | @heading epiphany-*-elf | |
feeeff5c JR |
3512 | Adapteva Epiphany. |
3513 | This configuration is intended for embedded systems. | |
3514 | ||
021c4bfd | 3515 | @html |
b8db17af | 3516 | <hr /> |
021c4bfd | 3517 | @end html |
e2ebe1c2 UB |
3518 | @anchor{x-x-freebsd} |
3519 | @heading *-*-freebsd* | |
02c8b4f8 LR |
3520 | Support for FreeBSD 1 was discontinued in GCC 3.2. Support for |
3521 | FreeBSD 2 (and any mutant a.out variants of FreeBSD 3) was | |
3522 | discontinued in GCC 4.0. | |
3523 | ||
aac91b74 GP |
3524 | In order to better utilize FreeBSD base system functionality and match |
3525 | the configuration of the system compiler, GCC 4.5 and above as well as | |
3526 | GCC 4.4 past 2010-06-20 leverage SSP support in libc (which is present | |
3527 | on FreeBSD 7 or later) and the use of @code{__cxa_atexit} by default | |
3528 | (on FreeBSD 6 or later). The use of @code{dl_iterate_phdr} inside | |
3529 | @file{libgcc_s.so.1} and boehm-gc (on FreeBSD 7 or later) is enabled | |
3530 | by GCC 4.5 and above. | |
27ed7478 | 3531 | |
02c8b4f8 LR |
3532 | We support FreeBSD using the ELF file format with DWARF 2 debugging |
3533 | for all CPU architectures. You may use @option{-gstabs} instead of | |
3534 | @option{-g}, if you really want the old debugging format. There are | |
021c4bfd | 3535 | no known issues with mixing object files and libraries with different |
02c8b4f8 LR |
3536 | debugging formats. Otherwise, this release of GCC should now match |
3537 | more of the configuration used in the stock FreeBSD configuration of | |
3538 | GCC@. In particular, @option{--enable-threads} is now configured by | |
3539 | default. However, as a general user, do not attempt to replace the | |
3540 | system compiler with this release. Known to bootstrap and check with | |
3541 | good results on FreeBSD 7.2-STABLE@. In the past, known to bootstrap | |
3542 | and check with good results on FreeBSD 3.0, 3.4, 4.0, 4.2, 4.3, 4.4, | |
3543 | 4.5, 4.8, 4.9 and 5-CURRENT@. | |
3544 | ||
3545 | The version of binutils installed in @file{/usr/bin} probably works | |
3546 | with this release of GCC@. Bootstrapping against the latest GNU | |
f2431d5d | 3547 | binutils and/or the version found in @file{/usr/ports/devel/binutils} has |
02c8b4f8 | 3548 | been known to enable additional features and improve overall testsuite |
97a2feb6 MK |
3549 | results. However, it is currently known that boehm-gc may not configure |
3550 | properly on FreeBSD prior to the FreeBSD 7.0 release with GNU binutils | |
3551 | after 2.16.1. | |
bc3a44db | 3552 | |
fef939d6 JB |
3553 | @html |
3554 | <hr /> | |
3555 | @end html | |
3556 | @anchor{ft32-x-elf} | |
3557 | @heading ft32-*-elf | |
3558 | The FT32 processor. | |
3559 | This configuration is intended for embedded systems. | |
3560 | ||
f42974dc | 3561 | @html |
b8db17af | 3562 | <hr /> |
f42974dc | 3563 | @end html |
e2ebe1c2 UB |
3564 | @anchor{h8300-hms} |
3565 | @heading h8300-hms | |
71c6b994 | 3566 | Renesas H8/300 series of processors. |
f42974dc | 3567 | |
962e6e00 | 3568 | Please have a look at the @uref{binaries.html,,binaries page}. |
f42974dc | 3569 | |
b8df899a JM |
3570 | The calling convention and structure layout has changed in release 2.6. |
3571 | All code must be recompiled. The calling convention now passes the | |
3572 | first three arguments in function calls in registers. Structures are no | |
3573 | longer a multiple of 2 bytes. | |
3574 | ||
f42974dc | 3575 | @html |
b8db17af | 3576 | <hr /> |
f42974dc | 3577 | @end html |
e2ebe1c2 UB |
3578 | @anchor{hppa-hp-hpux} |
3579 | @heading hppa*-hp-hpux* | |
6a1dbbaf | 3580 | Support for HP-UX version 9 and older was discontinued in GCC 3.4. |
f42974dc | 3581 | |
be7659ba JDA |
3582 | We require using gas/binutils on all hppa platforms. Version 2.19 or |
3583 | later is recommended. | |
f42974dc | 3584 | |
be7659ba | 3585 | It may be helpful to configure GCC with the |
38209993 | 3586 | @uref{./configure.html#with-gnu-as,,@option{--with-gnu-as}} and |
8a36672b | 3587 | @option{--with-as=@dots{}} options to ensure that GCC can find GAS@. |
f42974dc | 3588 | |
be7659ba JDA |
3589 | The HP assembler should not be used with GCC. It is rarely tested and may |
3590 | not work. It shouldn't be used with any languages other than C due to its | |
3591 | many limitations. | |
3592 | ||
3593 | Specifically, @option{-g} does not work (HP-UX uses a peculiar debugging | |
3594 | format which GCC does not know about). It also inserts timestamps | |
3595 | into each object file it creates, causing the 3-stage comparison test to | |
3596 | fail during a bootstrap. You should be able to continue by saying | |
3597 | @samp{make all-host all-target} after getting the failure from @samp{make}. | |
3598 | ||
3599 | Various GCC features are not supported. For example, it does not support weak | |
3600 | symbols or alias definitions. As a result, explicit template instantiations | |
3601 | are required when using C++. This makes it difficult if not impossible to | |
3602 | build many C++ applications. | |
f42974dc | 3603 | |
d5355cb2 JDA |
3604 | There are two default scheduling models for instructions. These are |
3605 | PROCESSOR_7100LC and PROCESSOR_8000. They are selected from the pa-risc | |
3606 | architecture specified for the target machine when configuring. | |
3607 | PROCESSOR_8000 is the default. PROCESSOR_7100LC is selected when | |
3608 | the target is a @samp{hppa1*} machine. | |
806bf413 JDA |
3609 | |
3610 | The PROCESSOR_8000 model is not well suited to older processors. Thus, | |
3611 | it is important to completely specify the machine architecture when | |
3612 | configuring if you want a model other than PROCESSOR_8000. The macro | |
3613 | TARGET_SCHED_DEFAULT can be defined in BOOT_CFLAGS if a different | |
3614 | default scheduling model is desired. | |
3615 | ||
25f710ba | 3616 | As of GCC 4.0, GCC uses the UNIX 95 namespace for HP-UX 10.10 |
d711cf67 JDA |
3617 | through 11.00, and the UNIX 98 namespace for HP-UX 11.11 and later. |
3618 | This namespace change might cause problems when bootstrapping with | |
3619 | an earlier version of GCC or the HP compiler as essentially the same | |
3620 | namespace is required for an entire build. This problem can be avoided | |
3621 | in a number of ways. With HP cc, @env{UNIX_STD} can be set to @samp{95} | |
3622 | or @samp{98}. Another way is to add an appropriate set of predefines | |
3623 | to @env{CC}. The description for the @option{munix=} option contains | |
3624 | a list of the predefines used with each standard. | |
3625 | ||
021c4bfd | 3626 | More specific information to @samp{hppa*-hp-hpux*} targets follows. |
f42974dc | 3627 | |
f42974dc | 3628 | @html |
b8db17af | 3629 | <hr /> |
f42974dc | 3630 | @end html |
e2ebe1c2 UB |
3631 | @anchor{hppa-hp-hpux10} |
3632 | @heading hppa*-hp-hpux10 | |
f9047ed3 | 3633 | For hpux10.20, we @emph{highly} recommend you pick up the latest sed patch |
7be03a0e | 3634 | @code{PHCO_19798} from HP@. |
f42974dc | 3635 | |
25f710ba | 3636 | The C++ ABI has changed incompatibly in GCC 4.0. COMDAT subspaces are |
9a55eab3 JDA |
3637 | used for one-only code and data. This resolves many of the previous |
3638 | problems in using C++ on this target. However, the ABI is not compatible | |
3639 | with the one implemented under HP-UX 11 using secondary definitions. | |
f42974dc DW |
3640 | |
3641 | @html | |
b8db17af | 3642 | <hr /> |
f42974dc | 3643 | @end html |
e2ebe1c2 UB |
3644 | @anchor{hppa-hp-hpux11} |
3645 | @heading hppa*-hp-hpux11 | |
c5124497 JDA |
3646 | GCC 3.0 and up support HP-UX 11. GCC 2.95.x is not supported and cannot |
3647 | be used to compile GCC 3.0 and up. | |
f269f54f | 3648 | |
97a2feb6 | 3649 | The libffi library haven't been ported to 64-bit HP-UX@ and doesn't build. |
be7659ba | 3650 | |
c5124497 | 3651 | Refer to @uref{binaries.html,,binaries} for information about obtaining |
8a36672b | 3652 | precompiled GCC binaries for HP-UX@. Precompiled binaries must be obtained |
fd250f0d | 3653 | to build the Ada language as it cannot be bootstrapped using C@. Ada is |
be7659ba | 3654 | only available for the 32-bit PA-RISC runtime. |
f401d0f5 | 3655 | |
02809848 PB |
3656 | Starting with GCC 3.4 an ISO C compiler is required to bootstrap. The |
3657 | bundled compiler supports only traditional C; you will need either HP's | |
3658 | unbundled compiler, or a binary distribution of GCC@. | |
3659 | ||
c5124497 JDA |
3660 | It is possible to build GCC 3.3 starting with the bundled HP compiler, |
3661 | but the process requires several steps. GCC 3.3 can then be used to | |
97a2feb6 | 3662 | build later versions. |
08b3d104 | 3663 | |
c5124497 JDA |
3664 | There are several possible approaches to building the distribution. |
3665 | Binutils can be built first using the HP tools. Then, the GCC | |
3666 | distribution can be built. The second approach is to build GCC | |
8a36672b | 3667 | first using the HP tools, then build binutils, then rebuild GCC@. |
c5124497 JDA |
3668 | There have been problems with various binary distributions, so it |
3669 | is best not to start from a binary distribution. | |
3670 | ||
3671 | On 64-bit capable systems, there are two distinct targets. Different | |
3672 | installation prefixes must be used if both are to be installed on | |
3673 | the same system. The @samp{hppa[1-2]*-hp-hpux11*} target generates code | |
3674 | for the 32-bit PA-RISC runtime architecture and uses the HP linker. | |
3675 | The @samp{hppa64-hp-hpux11*} target generates 64-bit code for the | |
be7659ba | 3676 | PA-RISC 2.0 architecture. |
c5124497 JDA |
3677 | |
3678 | The script config.guess now selects the target type based on the compiler | |
3679 | detected during configuration. You must define @env{PATH} or @env{CC} so | |
3680 | that configure finds an appropriate compiler for the initial bootstrap. | |
3681 | When @env{CC} is used, the definition should contain the options that are | |
3682 | needed whenever @env{CC} is used. | |
3683 | ||
3684 | Specifically, options that determine the runtime architecture must be | |
3685 | in @env{CC} to correctly select the target for the build. It is also | |
f0eb93a8 | 3686 | convenient to place many other compiler options in @env{CC}. For example, |
c5124497 JDA |
3687 | @env{CC="cc -Ac +DA2.0W -Wp,-H16376 -D_CLASSIC_TYPES -D_HPUX_SOURCE"} |
3688 | can be used to bootstrap the GCC 3.3 branch with the HP compiler in | |
3689 | 64-bit K&R/bundled mode. The @option{+DA2.0W} option will result in | |
3690 | the automatic selection of the @samp{hppa64-hp-hpux11*} target. The | |
3691 | macro definition table of cpp needs to be increased for a successful | |
3692 | build with the HP compiler. _CLASSIC_TYPES and _HPUX_SOURCE need to | |
3693 | be defined when building with the bundled compiler, or when using the | |
3694 | @option{-Ac} option. These defines aren't necessary with @option{-Ae}. | |
8c085f6f | 3695 | |
c5124497 JDA |
3696 | It is best to explicitly configure the @samp{hppa64-hp-hpux11*} target |
3697 | with the @option{--with-ld=@dots{}} option. This overrides the standard | |
3698 | search for ld. The two linkers supported on this target require different | |
3699 | commands. The default linker is determined during configuration. As a | |
3700 | result, it's not possible to switch linkers in the middle of a GCC build. | |
d1facce0 RW |
3701 | This has been reported to sometimes occur in unified builds of binutils |
3702 | and GCC@. | |
c5124497 | 3703 | |
c5124497 JDA |
3704 | A recent linker patch must be installed for the correct operation of |
3705 | GCC 3.3 and later. @code{PHSS_26559} and @code{PHSS_24304} are the | |
3706 | oldest linker patches that are known to work. They are for HP-UX | |
3707 | 11.00 and 11.11, respectively. @code{PHSS_24303}, the companion to | |
3708 | @code{PHSS_24304}, might be usable but it hasn't been tested. These | |
3709 | patches have been superseded. Consult the HP patch database to obtain | |
3710 | the currently recommended linker patch for your system. | |
3711 | ||
3712 | The patches are necessary for the support of weak symbols on the | |
3713 | 32-bit port, and for the running of initializers and finalizers. Weak | |
3714 | symbols are implemented using SOM secondary definition symbols. Prior | |
3715 | to HP-UX 11, there are bugs in the linker support for secondary symbols. | |
3716 | The patches correct a problem of linker core dumps creating shared | |
3717 | libraries containing secondary symbols, as well as various other | |
3718 | linking issues involving secondary symbols. | |
3719 | ||
3720 | GCC 3.3 uses the ELF DT_INIT_ARRAY and DT_FINI_ARRAY capabilities to | |
3721 | run initializers and finalizers on the 64-bit port. The 32-bit port | |
3722 | uses the linker @option{+init} and @option{+fini} options for the same | |
3723 | purpose. The patches correct various problems with the +init/+fini | |
3724 | options, including program core dumps. Binutils 2.14 corrects a | |
3725 | problem on the 64-bit port resulting from HP's non-standard use of | |
3726 | the .init and .fini sections for array initializers and finalizers. | |
f401d0f5 | 3727 | |
be7659ba JDA |
3728 | Although the HP and GNU linkers are both supported for the |
3729 | @samp{hppa64-hp-hpux11*} target, it is strongly recommended that the | |
3730 | HP linker be used for link editing on this target. | |
3731 | ||
3732 | At this time, the GNU linker does not support the creation of long | |
fd250f0d | 3733 | branch stubs. As a result, it cannot successfully link binaries |
be7659ba JDA |
3734 | containing branch offsets larger than 8 megabytes. In addition, |
3735 | there are problems linking shared libraries, linking executables | |
3736 | with @option{-static}, and with dwarf2 unwind and exception support. | |
3737 | It also doesn't provide stubs for internal calls to global functions | |
fd250f0d | 3738 | in shared libraries, so these calls cannot be overloaded. |
be7659ba JDA |
3739 | |
3740 | The HP dynamic loader does not support GNU symbol versioning, so symbol | |
3741 | versioning is not supported. It may be necessary to disable symbol | |
3742 | versioning with @option{--disable-symvers} when using GNU ld. | |
3743 | ||
3744 | POSIX threads are the default. The optional DCE thread library is not | |
3745 | supported, so @option{--enable-threads=dce} does not work. | |
08b3d104 | 3746 | |
f42974dc | 3747 | @html |
b8db17af | 3748 | <hr /> |
f42974dc | 3749 | @end html |
e2ebe1c2 UB |
3750 | @anchor{x-x-linux-gnu} |
3751 | @heading *-*-linux-gnu | |
b818de22 | 3752 | Versions of libstdc++-v3 starting with 3.2.1 require bug fixes present |
9e80ada7 PE |
3753 | in glibc 2.2.5 and later. More information is available in the |
3754 | libstdc++-v3 documentation. | |
3755 | ||
f42974dc | 3756 | @html |
b8db17af | 3757 | <hr /> |
f42974dc | 3758 | @end html |
e2ebe1c2 UB |
3759 | @anchor{ix86-x-linux} |
3760 | @heading i?86-*-linux* | |
1ea6f4c8 DH |
3761 | As of GCC 3.3, binutils 2.13.1 or later is required for this platform. |
3762 | See @uref{http://gcc.gnu.org/PR10877,,bug 10877} for more information. | |
f42974dc DW |
3763 | |
3764 | If you receive Signal 11 errors when building on GNU/Linux, then it is | |
3765 | possible you have a hardware problem. Further information on this can be | |
3766 | found on @uref{http://www.bitwizard.nl/sig11/,,www.bitwizard.nl}. | |
3767 | ||
8f47c084 JM |
3768 | @html |
3769 | <hr /> | |
3770 | @end html | |
e2ebe1c2 UB |
3771 | @anchor{ix86-x-solaris210} |
3772 | @heading i?86-*-solaris2.10 | |
493dd43c | 3773 | Use this for Solaris 10 or later on x86 and x86-64 systems. Starting |
fbdd5d87 RO |
3774 | with GCC 4.7, there is also a 64-bit @samp{amd64-*-solaris2.1[0-9]*} or |
3775 | @samp{x86_64-*-solaris2.1[0-9]*} configuration that corresponds to | |
3776 | @samp{sparcv9-sun-solaris2*}. | |
8c5cfa89 | 3777 | |
a8430f19 RO |
3778 | It is recommended that you configure GCC to use the GNU assembler. The |
3779 | versions included in Solaris 10, from GNU binutils 2.15 (in | |
3780 | @file{/usr/sfw/bin/gas}), and Solaris 11, from GNU binutils 2.19 or | |
3781 | newer (also available as @file{/usr/bin/gas} and | |
57e7db04 RO |
3782 | @file{/usr/gnu/bin/as}), work fine. The current version, from GNU |
3783 | binutils 2.29, is known to work, but the version from GNU binutils 2.26 | |
3784 | must be avoided. Recent versions of the Solaris assembler in | |
3785 | @file{/usr/ccs/bin/as} work almost as well, though. | |
8c5cfa89 RO |
3786 | @c FIXME: as patch requirements? |
3787 | ||
a8430f19 RO |
3788 | For linking, the Solaris linker, is preferred. If you want to use the GNU |
3789 | linker instead, note that due to a packaging bug the version in Solaris | |
3790 | 10, from GNU binutils 2.15 (in @file{/usr/sfw/bin/gld}), cannot be used, | |
3791 | while the version in Solaris 11, from GNU binutils 2.19 or newer (also | |
3792 | in @file{/usr/gnu/bin/ld} and @file{/usr/bin/gld}), works, as does the | |
57e7db04 | 3793 | latest version, from GNU binutils 2.29. |
8c5cfa89 RO |
3794 | |
3795 | To use GNU @command{as}, configure with the options | |
b7ae9eb5 RW |
3796 | @option{--with-gnu-as --with-as=@//usr/@/sfw/@/bin/@/gas}. It may be necessary |
3797 | to configure with @option{--without-gnu-ld --with-ld=@//usr/@/ccs/@/bin/@/ld} to | |
8c5cfa89 RO |
3798 | guarantee use of Sun @command{ld}. |
3799 | @c FIXME: why --without-gnu-ld --with-ld? | |
8f47c084 | 3800 | |
b499d9ab | 3801 | @html |
b8db17af | 3802 | <hr /> |
b499d9ab | 3803 | @end html |
e2ebe1c2 UB |
3804 | @anchor{ia64-x-linux} |
3805 | @heading ia64-*-linux | |
b499d9ab JJ |
3806 | IA-64 processor (also known as IPF, or Itanium Processor Family) |
3807 | running GNU/Linux. | |
3808 | ||
443728bb L |
3809 | If you are using the installed system libunwind library with |
3810 | @option{--with-system-libunwind}, then you must use libunwind 0.98 or | |
3811 | later. | |
bcd11e5e | 3812 | |
b499d9ab JJ |
3813 | None of the following versions of GCC has an ABI that is compatible |
3814 | with any of the other versions in this list, with the exception that | |
3815 | Red Hat 2.96 and Trillian 000171 are compatible with each other: | |
41ca24de | 3816 | 3.1, 3.0.2, 3.0.1, 3.0, Red Hat 2.96, and Trillian 000717. |
b499d9ab | 3817 | This primarily affects C++ programs and programs that create shared libraries. |
41ca24de DH |
3818 | GCC 3.1 or later is recommended for compiling linux, the kernel. |
3819 | As of version 3.1 GCC is believed to be fully ABI compliant, and hence no | |
3820 | more major ABI changes are expected. | |
b499d9ab | 3821 | |
959a73a4 DH |
3822 | @html |
3823 | <hr /> | |
3824 | @end html | |
e2ebe1c2 UB |
3825 | @anchor{ia64-x-hpux} |
3826 | @heading ia64-*-hpux* | |
8a36672b JM |
3827 | Building GCC on this target requires the GNU Assembler. The bundled HP |
3828 | assembler will not work. To prevent GCC from using the wrong assembler, | |
959a73a4 DH |
3829 | the option @option{--with-gnu-as} may be necessary. |
3830 | ||
8a36672b | 3831 | The GCC libunwind library has not been ported to HPUX@. This means that for |
959a73a4 | 3832 | GCC versions 3.2.3 and earlier, @option{--enable-libunwind-exceptions} |
8a36672b | 3833 | is required to build GCC@. For GCC 3.3 and later, this is the default. |
443728bb L |
3834 | For gcc 3.4.3 and later, @option{--enable-libunwind-exceptions} is |
3835 | removed and the system libunwind library will always be used. | |
959a73a4 | 3836 | |
f42974dc | 3837 | @html |
b8db17af | 3838 | <hr /> |
f42974dc DW |
3839 | <!-- rs6000-ibm-aix*, powerpc-ibm-aix* --> |
3840 | @end html | |
e2ebe1c2 UB |
3841 | @anchor{x-ibm-aix} |
3842 | @heading *-ibm-aix* | |
6a1dbbaf | 3843 | Support for AIX version 3 and older was discontinued in GCC 3.4. |
52c0e446 | 3844 | Support for AIX version 4.2 and older was discontinued in GCC 4.5. |
f42974dc | 3845 | |
7cc654b8 DE |
3846 | ``out of memory'' bootstrap failures may indicate a problem with |
3847 | process resource limits (ulimit). Hard limits are configured in the | |
71fc0c16 | 3848 | @file{/etc/security/limits} system configuration file. |
7cc654b8 | 3849 | |
0682ab79 DE |
3850 | GCC 4.9 and above require a C++ compiler for bootstrap. IBM VAC++ / xlC |
3851 | cannot bootstrap GCC. xlc can bootstrap an older version of GCC and | |
3852 | G++ can bootstrap recent releases of GCC. | |
3853 | ||
c58c92f5 DE |
3854 | GCC can bootstrap with recent versions of IBM XLC, but bootstrapping |
3855 | with an earlier release of GCC is recommended. Bootstrapping with XLC | |
3856 | requires a larger data segment, which can be enabled through the | |
3857 | @var{LDR_CNTRL} environment variable, e.g., | |
3858 | ||
3859 | @smallexample | |
98797784 RW |
3860 | % LDR_CNTRL=MAXDATA=0x50000000 |
3861 | % export LDR_CNTRL | |
c58c92f5 DE |
3862 | @end smallexample |
3863 | ||
3864 | One can start with a pre-compiled version of GCC to build from | |
3865 | sources. One may delete GCC's ``fixed'' header files when starting | |
3866 | with a version of GCC built for an earlier release of AIX. | |
3867 | ||
e8d8a034 DE |
3868 | To speed up the configuration phases of bootstrapping and installing GCC, |
3869 | one may use GNU Bash instead of AIX @command{/bin/sh}, e.g., | |
3870 | ||
3871 | @smallexample | |
98797784 RW |
3872 | % CONFIG_SHELL=/opt/freeware/bin/bash |
3873 | % export CONFIG_SHELL | |
e8d8a034 DE |
3874 | @end smallexample |
3875 | ||
cc11cc9b PB |
3876 | and then proceed as described in @uref{build.html,,the build |
3877 | instructions}, where we strongly recommend specifying an absolute path | |
e8d8a034 DE |
3878 | to invoke @var{srcdir}/configure. |
3879 | ||
d3a95f27 DE |
3880 | Because GCC on AIX is built as a 32-bit executable by default, |
3881 | (although it can generate 64-bit programs) the GMP and MPFR libraries | |
3882 | required by gfortran must be 32-bit libraries. Building GMP and MPFR | |
3883 | as static archive libraries works better than shared libraries. | |
3884 | ||
6cfb3f16 | 3885 | Errors involving @code{alloca} when building GCC generally are due |
021c4bfd | 3886 | to an incorrect definition of @code{CC} in the Makefile or mixing files |
161d7b59 | 3887 | compiled with the native C compiler and GCC@. During the stage1 phase of |
6cfb3f16 JM |
3888 | the build, the native AIX compiler @strong{must} be invoked as @command{cc} |
3889 | (not @command{xlc}). Once @command{configure} has been informed of | |
3890 | @command{xlc}, one needs to use @samp{make distclean} to remove the | |
38209993 | 3891 | configure cache files and ensure that @env{CC} environment variable |
f42974dc DW |
3892 | does not provide a definition that will confuse @command{configure}. |
3893 | If this error occurs during stage2 or later, then the problem most likely | |
3894 | is the version of Make (see above). | |
3895 | ||
a0bc8f9c DE |
3896 | The native @command{as} and @command{ld} are recommended for |
3897 | bootstrapping on AIX@. The GNU Assembler, GNU Linker, and GNU | |
3898 | Binutils version 2.20 is the minimum level that supports bootstrap on | |
3899 | AIX 5@. The GNU Assembler has not been updated to support AIX 6@ or | |
3900 | AIX 7. The native AIX tools do interoperate with GCC@. | |
df002c7d | 3901 | |
0682ab79 DE |
3902 | AIX 7.1 added partial support for DWARF debugging, but full support |
3903 | requires AIX 7.1 TL03 SP7 that supports additional DWARF sections and | |
3904 | fixes a bug in the assembler. AIX 7.1 TL03 SP5 distributed a version | |
3905 | of libm.a missing important symbols; a fix for IV77796 will be | |
3906 | included in SP6. | |
3907 | ||
daf633ba DE |
3908 | AIX 5.3 TL10, AIX 6.1 TL05 and AIX 7.1 TL00 introduced an AIX |
3909 | assembler change that sometimes produces corrupt assembly files | |
3910 | causing AIX linker errors. The bug breaks GCC bootstrap on AIX and | |
3911 | can cause compilation failures with existing GCC installations. An | |
3912 | AIX iFix for AIX 5.3 is available (APAR IZ98385 for AIX 5.3 TL10, APAR | |
a0bc8f9c DE |
3913 | IZ98477 for AIX 5.3 TL11 and IZ98134 for AIX 5.3 TL12). AIX 5.3 TL11 SP8, |
3914 | AIX 5.3 TL12 SP5, AIX 6.1 TL04 SP11, AIX 6.1 TL05 SP7, AIX 6.1 TL06 SP6, | |
3915 | AIX 6.1 TL07 and AIX 7.1 TL01 should include the fix. | |
daf633ba | 3916 | |
04d2be8e | 3917 | Building @file{libstdc++.a} requires a fix for an AIX Assembler bug |
bb674cef DE |
3918 | APAR IY26685 (AIX 4.3) or APAR IY25528 (AIX 5.1). It also requires a |
3919 | fix for another AIX Assembler bug and a co-dependent AIX Archiver fix | |
e4ae5e77 | 3920 | referenced as APAR IY53606 (AIX 5.2) or as APAR IY54774 (AIX 5.1) |
2705baf5 | 3921 | |
dd913323 | 3922 | @anchor{TransferAixShobj} |
bb674cef | 3923 | @samp{libstdc++} in GCC 3.4 increments the major version number of the |
fdf68669 | 3924 | shared object and GCC installation places the @file{libstdc++.a} |
bb674cef DE |
3925 | shared library in a common location which will overwrite the and GCC |
3926 | 3.3 version of the shared library. Applications either need to be | |
3927 | re-linked against the new shared library or the GCC 3.1 and GCC 3.3 | |
3928 | versions of the @samp{libstdc++} shared object needs to be available | |
3929 | to the AIX runtime loader. The GCC 3.1 @samp{libstdc++.so.4}, if | |
3930 | present, and GCC 3.3 @samp{libstdc++.so.5} shared objects can be | |
3931 | installed for runtime dynamic loading using the following steps to set | |
3932 | the @samp{F_LOADONLY} flag in the shared object for @emph{each} | |
fdf68669 DE |
3933 | multilib @file{libstdc++.a} installed: |
3934 | ||
bb674cef DE |
3935 | Extract the shared objects from the currently installed |
3936 | @file{libstdc++.a} archive: | |
3ab51846 | 3937 | @smallexample |
98797784 | 3938 | % ar -x libstdc++.a libstdc++.so.4 libstdc++.so.5 |
3ab51846 | 3939 | @end smallexample |
fdf68669 DE |
3940 | |
3941 | Enable the @samp{F_LOADONLY} flag so that the shared object will be | |
3942 | available for runtime dynamic loading, but not linking: | |
3ab51846 | 3943 | @smallexample |
98797784 | 3944 | % strip -e libstdc++.so.4 libstdc++.so.5 |
3ab51846 | 3945 | @end smallexample |
fdf68669 | 3946 | |
bb674cef | 3947 | Archive the runtime-only shared object in the GCC 3.4 |
fdf68669 | 3948 | @file{libstdc++.a} archive: |
3ab51846 | 3949 | @smallexample |
98797784 | 3950 | % ar -q libstdc++.a libstdc++.so.4 libstdc++.so.5 |
3ab51846 | 3951 | @end smallexample |
fdf68669 | 3952 | |
dd913323 MH |
3953 | Eventually, the |
3954 | @uref{./configure.html#WithAixSoname,,@option{--with-aix-soname=svr4}} | |
3955 | configure option may drop the need for this procedure for libraries that | |
3956 | support it. | |
3957 | ||
df002c7d DE |
3958 | Linking executables and shared libraries may produce warnings of |
3959 | duplicate symbols. The assembly files generated by GCC for AIX always | |
3960 | have included multiple symbol definitions for certain global variable | |
3961 | and function declarations in the original program. The warnings should | |
3962 | not prevent the linker from producing a correct library or runnable | |
3963 | executable. | |
3964 | ||
6cfb3f16 | 3965 | AIX 4.3 utilizes a ``large format'' archive to support both 32-bit and |
df002c7d DE |
3966 | 64-bit object modules. The routines provided in AIX 4.3.0 and AIX 4.3.1 |
3967 | to parse archive libraries did not handle the new format correctly. | |
3968 | These routines are used by GCC and result in error messages during | |
6cfb3f16 | 3969 | linking such as ``not a COFF file''. The version of the routines shipped |
df002c7d DE |
3970 | with AIX 4.3.1 should work for a 32-bit environment. The @option{-g} |
3971 | option of the archive command may be used to create archives of 32-bit | |
6cfb3f16 | 3972 | objects using the original ``small format''. A correct version of the |
d5d8d540 | 3973 | routines is shipped with AIX 4.3.2 and above. |
df002c7d | 3974 | |
f42974dc DW |
3975 | Some versions of the AIX binder (linker) can fail with a relocation |
3976 | overflow severe error when the @option{-bbigtoc} option is used to link | |
161d7b59 | 3977 | GCC-produced object files into an executable that overflows the TOC@. A fix |
f42974dc DW |
3978 | for APAR IX75823 (OVERFLOW DURING LINK WHEN USING GCC AND -BBIGTOC) is |
3979 | available from IBM Customer Support and from its | |
d5d8d540 | 3980 | @uref{http://techsupport.services.ibm.com/,,techsupport.services.ibm.com} |
f42974dc DW |
3981 | website as PTF U455193. |
3982 | ||
df002c7d | 3983 | The AIX 4.3.2.1 linker (bos.rte.bind_cmds Level 4.3.2.1) will dump core |
161d7b59 | 3984 | with a segmentation fault when invoked by any version of GCC@. A fix for |
df002c7d | 3985 | APAR IX87327 is available from IBM Customer Support and from its |
d5d8d540 | 3986 | @uref{http://techsupport.services.ibm.com/,,techsupport.services.ibm.com} |
df002c7d | 3987 | website as PTF U461879. This fix is incorporated in AIX 4.3.3 and above. |
f42974dc DW |
3988 | |
3989 | The initial assembler shipped with AIX 4.3.0 generates incorrect object | |
3990 | files. A fix for APAR IX74254 (64BIT DISASSEMBLED OUTPUT FROM COMPILER FAILS | |
3991 | TO ASSEMBLE/BIND) is available from IBM Customer Support and from its | |
d5d8d540 | 3992 | @uref{http://techsupport.services.ibm.com/,,techsupport.services.ibm.com} |
f42974dc DW |
3993 | website as PTF U453956. This fix is incorporated in AIX 4.3.1 and above. |
3994 | ||
161d7b59 | 3995 | AIX provides National Language Support (NLS)@. Compilers and assemblers |
df002c7d | 3996 | use NLS to support locale-specific representations of various data |
6cfb3f16 | 3997 | formats including floating-point numbers (e.g., @samp{.} vs @samp{,} for |
df002c7d DE |
3998 | separating decimal fractions). There have been problems reported where |
3999 | GCC does not produce the same floating-point formats that the assembler | |
c771326b | 4000 | expects. If one encounters this problem, set the @env{LANG} |
6cfb3f16 | 4001 | environment variable to @samp{C} or @samp{En_US}. |
f42974dc | 4002 | |
d5d8d540 DE |
4003 | A default can be specified with the @option{-mcpu=@var{cpu_type}} |
4004 | switch and using the configure option @option{--with-cpu-@var{cpu_type}}. | |
f42974dc | 4005 | |
6b3d1e47 SC |
4006 | @html |
4007 | <hr /> | |
4008 | @end html | |
e2ebe1c2 UB |
4009 | @anchor{iq2000-x-elf} |
4010 | @heading iq2000-*-elf | |
6b3d1e47 SC |
4011 | Vitesse IQ2000 processors. These are used in embedded |
4012 | applications. There are no standard Unix configurations. | |
4013 | ||
aa4945c1 JB |
4014 | @html |
4015 | <hr /> | |
4016 | @end html | |
e2ebe1c2 UB |
4017 | @anchor{lm32-x-elf} |
4018 | @heading lm32-*-elf | |
aa4945c1 JB |
4019 | Lattice Mico32 processor. |
4020 | This configuration is intended for embedded systems. | |
4021 | ||
4022 | @html | |
4023 | <hr /> | |
4024 | @end html | |
e2ebe1c2 UB |
4025 | @anchor{lm32-x-uclinux} |
4026 | @heading lm32-*-uclinux | |
aa4945c1 JB |
4027 | Lattice Mico32 processor. |
4028 | This configuration is intended for embedded systems running uClinux. | |
4029 | ||
38b2d076 DD |
4030 | @html |
4031 | <hr /> | |
4032 | @end html | |
e2ebe1c2 UB |
4033 | @anchor{m32c-x-elf} |
4034 | @heading m32c-*-elf | |
38b2d076 DD |
4035 | Renesas M32C processor. |
4036 | This configuration is intended for embedded systems. | |
4037 | ||
b8df899a | 4038 | @html |
b8db17af | 4039 | <hr /> |
b8df899a | 4040 | @end html |
e2ebe1c2 UB |
4041 | @anchor{m32r-x-elf} |
4042 | @heading m32r-*-elf | |
25f47a4c | 4043 | Renesas M32R processor. |
b8df899a JM |
4044 | This configuration is intended for embedded systems. |
4045 | ||
b8df899a | 4046 | @html |
b8db17af | 4047 | <hr /> |
b8df899a | 4048 | @end html |
e2ebe1c2 UB |
4049 | @anchor{m68k-x-x} |
4050 | @heading m68k-*-* | |
52c0e446 | 4051 | By default, |
368b55f6 NS |
4052 | @samp{m68k-*-elf*}, @samp{m68k-*-rtems}, @samp{m68k-*-uclinux} and |
4053 | @samp{m68k-*-linux} | |
10e96df4 NS |
4054 | build libraries for both M680x0 and ColdFire processors. If you only |
4055 | need the M680x0 libraries, you can omit the ColdFire ones by passing | |
4056 | @option{--with-arch=m68k} to @command{configure}. Alternatively, you | |
4057 | can omit the M680x0 libraries by passing @option{--with-arch=cf} to | |
368b55f6 NS |
4058 | @command{configure}. These targets default to 5206 or 5475 code as |
4059 | appropriate for the target system when | |
10e96df4 NS |
4060 | configured with @option{--with-arch=cf} and 68020 code otherwise. |
4061 | ||
368b55f6 | 4062 | The @samp{m68k-*-netbsd} and |
10e96df4 NS |
4063 | @samp{m68k-*-openbsd} targets also support the @option{--with-arch} |
4064 | option. They will generate ColdFire CFV4e code when configured with | |
4065 | @option{--with-arch=cf} and 68020 code otherwise. | |
4066 | ||
4067 | You can override the default processors listed above by configuring | |
4068 | with @option{--with-cpu=@var{target}}. This @var{target} can either | |
4069 | be a @option{-mcpu} argument or one of the following values: | |
4070 | @samp{m68000}, @samp{m68010}, @samp{m68020}, @samp{m68030}, | |
900ec02d | 4071 | @samp{m68040}, @samp{m68060}, @samp{m68020-40} and @samp{m68020-60}. |
59fbf3cb | 4072 | |
39e7722b JM |
4073 | GCC requires at least binutils version 2.17 on these targets. |
4074 | ||
4529dbf1 RS |
4075 | @html |
4076 | <hr /> | |
4077 | @end html | |
e2ebe1c2 UB |
4078 | @anchor{m68k-x-uclinux} |
4079 | @heading m68k-*-uclinux | |
4529dbf1 RS |
4080 | GCC 4.3 changed the uClinux configuration so that it uses the |
4081 | @samp{m68k-linux-gnu} ABI rather than the @samp{m68k-elf} ABI. | |
4082 | It also added improved support for C++ and flat shared libraries, | |
ebb9f8b0 | 4083 | both of which were ABI changes. |
4529dbf1 | 4084 | |
80920132 ME |
4085 | @html |
4086 | <hr /> | |
4087 | @end html | |
e2ebe1c2 UB |
4088 | @anchor{microblaze-x-elf} |
4089 | @heading microblaze-*-elf | |
80920132 ME |
4090 | Xilinx MicroBlaze processor. |
4091 | This configuration is intended for embedded systems. | |
4092 | ||
b8df899a | 4093 | @html |
b8db17af | 4094 | <hr /> |
b8df899a | 4095 | @end html |
e2ebe1c2 UB |
4096 | @anchor{mips-x-x} |
4097 | @heading mips-*-* | |
b8df899a JM |
4098 | If on a MIPS system you get an error message saying ``does not have gp |
4099 | sections for all it's [sic] sectons [sic]'', don't worry about it. This | |
4100 | happens whenever you use GAS with the MIPS linker, but there is not | |
4101 | really anything wrong, and it is okay to use the output file. You can | |
4102 | stop such warnings by installing the GNU linker. | |
4103 | ||
4104 | It would be nice to extend GAS to produce the gp tables, but they are | |
4105 | optional, and there should not be a warning about their absence. | |
4106 | ||
26979a17 PE |
4107 | The libstdc++ atomic locking routines for MIPS targets requires MIPS II |
4108 | and later. A patch went in just after the GCC 3.3 release to | |
4109 | make @samp{mips*-*-*} use the generic implementation instead. You can also | |
4110 | configure for @samp{mipsel-elf} as a workaround. The | |
4111 | @samp{mips*-*-linux*} target continues to use the MIPS II routines. More | |
4112 | work on this is expected in future releases. | |
4113 | ||
66471b47 DD |
4114 | @c If you make --with-llsc the default for another target, please also |
4115 | @c update the description of the --with-llsc option. | |
4116 | ||
4117 | The built-in @code{__sync_*} functions are available on MIPS II and | |
4118 | later systems and others that support the @samp{ll}, @samp{sc} and | |
4119 | @samp{sync} instructions. This can be overridden by passing | |
4120 | @option{--with-llsc} or @option{--without-llsc} when configuring GCC. | |
4121 | Since the Linux kernel emulates these instructions if they are | |
4122 | missing, the default for @samp{mips*-*-linux*} targets is | |
4123 | @option{--with-llsc}. The @option{--with-llsc} and | |
4124 | @option{--without-llsc} configure options may be overridden at compile | |
4125 | time by passing the @option{-mllsc} or @option{-mno-llsc} options to | |
4126 | the compiler. | |
4127 | ||
9f0df97a DD |
4128 | MIPS systems check for division by zero (unless |
4129 | @option{-mno-check-zero-division} is passed to the compiler) by | |
4130 | generating either a conditional trap or a break instruction. Using | |
4131 | trap results in smaller code, but is only supported on MIPS II and | |
4132 | later. Also, some versions of the Linux kernel have a bug that | |
8a36672b | 4133 | prevents trap from generating the proper signal (@code{SIGFPE}). To enable |
9f0df97a | 4134 | the use of break, use the @option{--with-divide=breaks} |
8a36672b | 4135 | @command{configure} option when configuring GCC@. The default is to |
9f0df97a DD |
4136 | use traps on systems that support them. |
4137 | ||
cceb575c AG |
4138 | @html |
4139 | <hr /> | |
4140 | @end html | |
e2ebe1c2 UB |
4141 | @anchor{moxie-x-elf} |
4142 | @heading moxie-*-elf | |
0cd6f755 | 4143 | The moxie processor. |
cceb575c | 4144 | |
f6a83b4a DD |
4145 | @html |
4146 | <hr /> | |
4147 | @end html | |
e2ebe1c2 UB |
4148 | @anchor{msp430-x-elf} |
4149 | @heading msp430-*-elf | |
f6a83b4a DD |
4150 | TI MSP430 processor. |
4151 | This configuration is intended for embedded systems. | |
4152 | ||
d4fbc3ae CJW |
4153 | @html |
4154 | <hr /> | |
4155 | @end html | |
4156 | @anchor{nds32le-x-elf} | |
4157 | @heading nds32le-*-elf | |
4158 | Andes NDS32 target in little endian mode. | |
4159 | ||
4160 | @html | |
4161 | <hr /> | |
4162 | @end html | |
4163 | @anchor{nds32be-x-elf} | |
4164 | @heading nds32be-*-elf | |
4165 | Andes NDS32 target in big endian mode. | |
4166 | ||
d7705288 TS |
4167 | @html |
4168 | <hr /> | |
4169 | @end html | |
4170 | @anchor{nvptx-x-none} | |
4171 | @heading nvptx-*-none | |
4172 | Nvidia PTX target. | |
4173 | ||
4174 | Instead of GNU binutils, you will need to install | |
4175 | @uref{https://github.com/MentorEmbedded/nvptx-tools/,,nvptx-tools}. | |
4176 | Tell GCC where to find it: | |
4177 | @option{--with-build-time-tools=[install-nvptx-tools]/nvptx-none/bin}. | |
4178 | ||
4179 | A nvptx port of newlib is available at | |
4180 | @uref{https://github.com/MentorEmbedded/nvptx-newlib/,,nvptx-newlib}. | |
4181 | It can be automatically built together with GCC@. For this, add a | |
4182 | symbolic link to nvptx-newlib's @file{newlib} directory to the | |
4183 | directory containing the GCC sources. | |
4184 | ||
4185 | Use the @option{--disable-sjlj-exceptions} and | |
4186 | @option{--enable-newlib-io-long-long} options when configuring. | |
4187 | ||
b8df899a | 4188 | @html |
b8db17af | 4189 | <hr /> |
b8df899a | 4190 | @end html |
e2ebe1c2 UB |
4191 | @anchor{powerpc-x-x} |
4192 | @heading powerpc-*-* | |
6cfb3f16 JM |
4193 | You can specify a default version for the @option{-mcpu=@var{cpu_type}} |
4194 | switch by using the configure option @option{--with-cpu-@var{cpu_type}}. | |
b8df899a | 4195 | |
983bd86d | 4196 | You will need GNU binutils 2.15 or newer. |
1590a115 | 4197 | |
4f2b1139 | 4198 | @html |
b8db17af | 4199 | <hr /> |
4f2b1139 | 4200 | @end html |
e2ebe1c2 UB |
4201 | @anchor{powerpc-x-darwin} |
4202 | @heading powerpc-*-darwin* | |
4f2b1139 SS |
4203 | PowerPC running Darwin (Mac OS X kernel). |
4204 | ||
4f2b1139 SS |
4205 | Pre-installed versions of Mac OS X may not include any developer tools, |
4206 | meaning that you will not be able to build GCC from source. Tool | |
4207 | binaries are available at | |
b99d68f5 | 4208 | @uref{https://opensource.apple.com}. |
4f2b1139 | 4209 | |
80c85ca2 MS |
4210 | This version of GCC requires at least cctools-590.36. The |
4211 | cctools-590.36 package referenced from | |
4212 | @uref{http://gcc.gnu.org/ml/gcc/2006-03/msg00507.html} will not work | |
4213 | on systems older than 10.3.9 (aka darwin7.9.0). | |
4f2b1139 | 4214 | |
021c4bfd | 4215 | @html |
b8db17af | 4216 | <hr /> |
021c4bfd | 4217 | @end html |
e2ebe1c2 UB |
4218 | @anchor{powerpc-x-elf} |
4219 | @heading powerpc-*-elf | |
021c4bfd RO |
4220 | PowerPC system in big endian mode, running System V.4. |
4221 | ||
f42974dc | 4222 | @html |
b8db17af | 4223 | <hr /> |
f42974dc | 4224 | @end html |
e2ebe1c2 UB |
4225 | @anchor{powerpc-x-linux-gnu} |
4226 | @heading powerpc*-*-linux-gnu* | |
1590a115 | 4227 | PowerPC system in big endian mode running Linux. |
f42974dc | 4228 | |
edf1b3f3 | 4229 | @html |
b8db17af | 4230 | <hr /> |
edf1b3f3 | 4231 | @end html |
e2ebe1c2 UB |
4232 | @anchor{powerpc-x-netbsd} |
4233 | @heading powerpc-*-netbsd* | |
f0947430 | 4234 | PowerPC system in big endian mode running NetBSD@. |
edf1b3f3 | 4235 | |
b8df899a | 4236 | @html |
b8db17af | 4237 | <hr /> |
b8df899a | 4238 | @end html |
e2ebe1c2 UB |
4239 | @anchor{powerpc-x-eabisim} |
4240 | @heading powerpc-*-eabisim | |
b8df899a JM |
4241 | Embedded PowerPC system in big endian mode for use in running under the |
4242 | PSIM simulator. | |
4243 | ||
b8df899a | 4244 | @html |
b8db17af | 4245 | <hr /> |
b8df899a | 4246 | @end html |
e2ebe1c2 UB |
4247 | @anchor{powerpc-x-eabi} |
4248 | @heading powerpc-*-eabi | |
b8df899a JM |
4249 | Embedded PowerPC system in big endian mode. |
4250 | ||
b8df899a | 4251 | @html |
b8db17af | 4252 | <hr /> |
b8df899a | 4253 | @end html |
e2ebe1c2 UB |
4254 | @anchor{powerpcle-x-elf} |
4255 | @heading powerpcle-*-elf | |
b8df899a JM |
4256 | PowerPC system in little endian mode, running System V.4. |
4257 | ||
b8df899a | 4258 | @html |
b8db17af | 4259 | <hr /> |
b8df899a | 4260 | @end html |
e2ebe1c2 UB |
4261 | @anchor{powerpcle-x-eabisim} |
4262 | @heading powerpcle-*-eabisim | |
b8df899a JM |
4263 | Embedded PowerPC system in little endian mode for use in running under |
4264 | the PSIM simulator. | |
4265 | ||
4266 | @html | |
b8db17af | 4267 | <hr /> |
b8df899a | 4268 | @end html |
e2ebe1c2 UB |
4269 | @anchor{powerpcle-x-eabi} |
4270 | @heading powerpcle-*-eabi | |
b8df899a JM |
4271 | Embedded PowerPC system in little endian mode. |
4272 | ||
85b8555e DD |
4273 | @html |
4274 | <hr /> | |
4275 | @end html | |
e2ebe1c2 UB |
4276 | @anchor{rl78-x-elf} |
4277 | @heading rl78-*-elf | |
85b8555e DD |
4278 | The Renesas RL78 processor. |
4279 | This configuration is intended for embedded systems. | |
4280 | ||
09cae750 PD |
4281 | @html |
4282 | <hr /> | |
4283 | @end html | |
4284 | @anchor{riscv32-x-elf} | |
4285 | @heading riscv32-*-elf | |
4286 | The RISC-V RV32 instruction set. | |
4287 | This configuration is intended for embedded systems. | |
3b82a32c PD |
4288 | This (and all other RISC-V) targets are supported upstream as of the |
4289 | binutils 2.28 release. | |
09cae750 PD |
4290 | |
4291 | @html | |
4292 | <hr /> | |
4293 | @end html | |
3b82a32c PD |
4294 | @anchor{riscv32-x-linux} |
4295 | @heading riscv32-*-linux | |
4296 | The RISC-V RV32 instruction set running GNU/Linux. | |
4297 | This (and all other RISC-V) targets are supported upstream as of the | |
4298 | binutils 2.28 release. | |
09cae750 PD |
4299 | |
4300 | @html | |
4301 | <hr /> | |
4302 | @end html | |
3b82a32c PD |
4303 | @anchor{riscv64-x-elf} |
4304 | @heading riscv64-*-elf | |
4305 | The RISC-V RV64 instruction set. | |
4306 | This configuration is intended for embedded systems. | |
4307 | This (and all other RISC-V) targets are supported upstream as of the | |
4308 | binutils 2.28 release. | |
09cae750 PD |
4309 | |
4310 | @html | |
4311 | <hr /> | |
4312 | @end html | |
4313 | @anchor{riscv64-x-linux} | |
4314 | @heading riscv64-*-linux | |
4315 | The RISC-V RV64 instruction set running GNU/Linux. | |
3b82a32c PD |
4316 | This (and all other RISC-V) targets are supported upstream as of the |
4317 | binutils 2.28 release. | |
09cae750 | 4318 | |
65a324b4 NC |
4319 | @html |
4320 | <hr /> | |
4321 | @end html | |
e2ebe1c2 UB |
4322 | @anchor{rx-x-elf} |
4323 | @heading rx-*-elf | |
67afc9a6 | 4324 | The Renesas RX processor. |
65a324b4 | 4325 | |
91abf72d | 4326 | @html |
b8db17af | 4327 | <hr /> |
91abf72d | 4328 | @end html |
e2ebe1c2 UB |
4329 | @anchor{s390-x-linux} |
4330 | @heading s390-*-linux* | |
95fef11f | 4331 | S/390 system running GNU/Linux for S/390@. |
91abf72d HP |
4332 | |
4333 | @html | |
b8db17af | 4334 | <hr /> |
91abf72d | 4335 | @end html |
e2ebe1c2 UB |
4336 | @anchor{s390x-x-linux} |
4337 | @heading s390x-*-linux* | |
95fef11f | 4338 | zSeries system (64-bit) running GNU/Linux for zSeries@. |
91abf72d | 4339 | |
8bf06993 UW |
4340 | @html |
4341 | <hr /> | |
4342 | @end html | |
e2ebe1c2 UB |
4343 | @anchor{s390x-ibm-tpf} |
4344 | @heading s390x-ibm-tpf* | |
8a36672b | 4345 | zSeries system (64-bit) running TPF@. This platform is |
8bf06993 UW |
4346 | supported as cross-compilation target only. |
4347 | ||
f42974dc | 4348 | @html |
b8db17af | 4349 | <hr /> |
f42974dc | 4350 | @end html |
250d5688 | 4351 | @c Please use Solaris 2 to refer to all release of Solaris, starting |
1460af95 | 4352 | @c with 2.0 until 2.6, 7, 8, etc. Solaris 1 was a marketing name for |
250d5688 RO |
4353 | @c SunOS 4 releases which we don't use to avoid confusion. Solaris |
4354 | @c alone is too unspecific and must be avoided. | |
e2ebe1c2 UB |
4355 | @anchor{x-x-solaris2} |
4356 | @heading *-*-solaris2* | |
f5ea1d38 | 4357 | Support for Solaris 9 has been removed in GCC 5. Support for Solaris |
d9f069ab RO |
4358 | 8 has been removed in GCC 4.8. Support for Solaris 7 has been removed |
4359 | in GCC 4.6. | |
8c5cfa89 | 4360 | |
493dd43c RO |
4361 | Sun does not ship a C compiler with Solaris 2 before Solaris 10, though |
4362 | you can download the Sun Studio compilers for free. In Solaris 10 and | |
17246516 | 4363 | 11, GCC 3.4.3 is available as @command{/usr/sfw/bin/gcc}. Solaris 11 |
a8430f19 RO |
4364 | also provides GCC 4.5.2, 4.7.3, and 4.8.2 as |
4365 | @command{/usr/gcc/4.5/bin/gcc} or similar. Alternatively, | |
8c5cfa89 | 4366 | you can install a pre-built GCC to bootstrap and install GCC. See the |
dbd210ef | 4367 | @uref{binaries.html,,binaries page} for details. |
f42974dc | 4368 | |
250d5688 | 4369 | The Solaris 2 @command{/bin/sh} will often fail to configure |
97a2feb6 MK |
4370 | @samp{libstdc++-v3}or @samp{boehm-gc}. We therefore recommend using the |
4371 | following initial sequence of commands | |
bc890961 EB |
4372 | |
4373 | @smallexample | |
98797784 RW |
4374 | % CONFIG_SHELL=/bin/ksh |
4375 | % export CONFIG_SHELL | |
bc890961 EB |
4376 | @end smallexample |
4377 | ||
8c5cfa89 | 4378 | @noindent |
1da1ce3f | 4379 | and proceed as described in @uref{configure.html,,the configure instructions}. |
37de1373 | 4380 | In addition we strongly recommend specifying an absolute path to invoke |
8c5cfa89 | 4381 | @command{@var{srcdir}/configure}. |
e6855a2d | 4382 | |
a8430f19 | 4383 | Solaris 10 comes with a number of optional OS packages. Some of these |
92441f83 | 4384 | are needed to use GCC fully, namely @code{SUNWarc}, |
dbd210ef KC |
4385 | @code{SUNWbtool}, @code{SUNWesu}, @code{SUNWhea}, @code{SUNWlibm}, |
4386 | @code{SUNWsprot}, and @code{SUNWtoo}. If you did not install all | |
a8430f19 | 4387 | optional packages when installing Solaris 10, you will need to verify that |
b8df899a | 4388 | the packages that GCC needs are installed. |
b8df899a | 4389 | To check whether an optional package is installed, use |
dbd210ef | 4390 | the @command{pkginfo} command. To add an optional package, use the |
a8430f19 | 4391 | @command{pkgadd} command. For further details, see the Solaris 10 |
b8df899a JM |
4392 | documentation. |
4393 | ||
a8430f19 RO |
4394 | Starting with Solaris 11, the package management has changed, so you |
4395 | need to check for @code{system/header}, @code{system/linker}, and | |
4396 | @code{developer/assembler} packages. Checking for and installing | |
4397 | packages is done with the @command{pkg} command now. | |
4398 | ||
250d5688 | 4399 | Trying to use the linker and other tools in |
b8df899a JM |
4400 | @file{/usr/ucb} to install GCC has been observed to cause trouble. |
4401 | For example, the linker may hang indefinitely. The fix is to remove | |
250d5688 | 4402 | @file{/usr/ucb} from your @env{PATH}. |
f42974dc | 4403 | |
bc890961 EB |
4404 | The build process works more smoothly with the legacy Sun tools so, if you |
4405 | have @file{/usr/xpg4/bin} in your @env{PATH}, we recommend that you place | |
4406 | @file{/usr/bin} before @file{/usr/xpg4/bin} for the duration of the build. | |
4407 | ||
a8430f19 RO |
4408 | We recommend the use of the Solaris assembler or the GNU assembler, in |
4409 | conjunction with the Solaris linker. The GNU @command{as} | |
4410 | versions included in Solaris 10, from GNU binutils 2.15 (in | |
4411 | @file{/usr/sfw/bin/gas}), and Solaris 11, | |
4412 | from GNU binutils 2.19 or newer (also in @file{/usr/bin/gas} and | |
4413 | @file{/usr/gnu/bin/as}), are known to work. | |
57e7db04 RO |
4414 | The current version, from GNU binutils 2.29, |
4415 | is known to work as well. Note that your mileage may vary | |
a8430f19 | 4416 | if you use a combination of the GNU tools and the Solaris tools: while the |
2bd58b1b | 4417 | combination GNU @command{as} + Sun @command{ld} should reasonably work, |
493dd43c RO |
4418 | the reverse combination Sun @command{as} + GNU @command{ld} may fail to |
4419 | build or cause memory corruption at runtime in some cases for C++ programs. | |
8c5cfa89 | 4420 | @c FIXME: still? |
dd178909 | 4421 | GNU @command{ld} usually works as well, although the version included in |
8c5cfa89 | 4422 | Solaris 10 cannot be used due to several bugs. Again, the current |
57e7db04 | 4423 | version (2.29) is known to work, but generally lacks platform specific |
a8430f19 | 4424 | features, so better stay with Solaris @command{ld}. To use the LTO linker |
493dd43c RO |
4425 | plugin (@option{-fuse-linker-plugin}) with GNU @command{ld}, GNU |
4426 | binutils @emph{must} be configured with @option{--enable-largefile}. | |
2c00bd42 | 4427 | |
f5ea1d38 | 4428 | To enable symbol versioning in @samp{libstdc++} with the Solaris linker, |
c18dc5cc RO |
4429 | you need to have any version of GNU @command{c++filt}, which is part of |
4430 | GNU binutils. @samp{libstdc++} symbol versioning will be disabled if no | |
f5ea1d38 EB |
4431 | appropriate version is found. Solaris @command{c++filt} from the Solaris |
4432 | Studio compilers does @emph{not} work. | |
4433 | ||
c7525a64 KG |
4434 | Sun bug 4927647 sometimes causes random spurious testsuite failures |
4435 | related to missing diagnostic output. This bug doesn't affect GCC | |
4436 | itself, rather it is a kernel bug triggered by the @command{expect} | |
4437 | program which is used only by the GCC testsuite driver. When the bug | |
4438 | causes the @command{expect} program to miss anticipated output, extra | |
4439 | testsuite failures appear. | |
4440 | ||
d191cd06 EB |
4441 | @html |
4442 | <hr /> | |
4443 | @end html | |
e2ebe1c2 UB |
4444 | @anchor{sparc-x-x} |
4445 | @heading sparc*-*-* | |
d191cd06 EB |
4446 | This section contains general configuration information for all |
4447 | SPARC-based platforms. In addition to reading this section, please | |
4448 | read all other sections that match your target. | |
4449 | ||
4450 | Newer versions of the GNU Multiple Precision Library (GMP), the MPFR | |
4451 | library and the MPC library are known to be miscompiled by earlier | |
4452 | versions of GCC on these platforms. We therefore recommend the use | |
4453 | of the exact versions of these libraries listed as minimal versions | |
4454 | in @uref{prerequisites.html,,the prerequisites}. | |
4455 | ||
dbd210ef | 4456 | @html |
b8db17af | 4457 | <hr /> |
dbd210ef | 4458 | @end html |
e2ebe1c2 UB |
4459 | @anchor{sparc-sun-solaris2} |
4460 | @heading sparc-sun-solaris2* | |
8c5cfa89 | 4461 | When GCC is configured to use GNU binutils 2.14 or later, the binaries |
1405141b DN |
4462 | produced are smaller than the ones produced using Sun's native tools; |
4463 | this difference is quite significant for binaries containing debugging | |
4464 | information. | |
4465 | ||
03b272d2 | 4466 | Starting with Solaris 7, the operating system is capable of executing |
975c6e4e RO |
4467 | 64-bit SPARC V9 binaries. GCC 3.1 and later properly supports |
4468 | this; the @option{-m64} option enables 64-bit code generation. | |
4469 | However, if all you want is code tuned for the UltraSPARC CPU, you | |
4470 | should try the @option{-mtune=ultrasparc} option instead, which produces | |
4471 | code that, unlike full 64-bit code, can still run on non-UltraSPARC | |
edf1c8df | 4472 | machines. |
03b272d2 | 4473 | |
d191cd06 EB |
4474 | When configuring the GNU Multiple Precision Library (GMP), the MPFR |
4475 | library or the MPC library on a Solaris 7 or later system, the canonical | |
4476 | target triplet must be specified as the @command{build} parameter on the | |
4477 | configure line. This target triplet can be obtained by invoking @command{./config.guess} in the toplevel source directory of GCC (and | |
4478 | not that of GMP or MPFR or MPC). For example on a Solaris 9 system: | |
fdbf04c8 EB |
4479 | |
4480 | @smallexample | |
98797784 | 4481 | % ./configure --build=sparc-sun-solaris2.9 --prefix=xxx |
fdbf04c8 EB |
4482 | @end smallexample |
4483 | ||
cb717ac4 RO |
4484 | @html |
4485 | <hr /> | |
4486 | @end html | |
e2ebe1c2 UB |
4487 | @anchor{sparc-sun-solaris210} |
4488 | @heading sparc-sun-solaris2.10 | |
cb717ac4 RO |
4489 | There is a bug in older versions of the Sun assembler which breaks |
4490 | thread-local storage (TLS). A typical error message is | |
4491 | ||
4492 | @smallexample | |
4493 | ld: fatal: relocation error: R_SPARC_TLS_LE_HIX22: file /var/tmp//ccamPA1v.o: | |
4494 | symbol <unknown>: bad symbol type SECT: symbol type must be TLS | |
4495 | @end smallexample | |
4496 | ||
8c5cfa89 | 4497 | @noindent |
cb717ac4 RO |
4498 | This bug is fixed in Sun patch 118683-03 or later. |
4499 | ||
c6fa9728 | 4500 | @html |
b8db17af | 4501 | <hr /> |
c6fa9728 | 4502 | @end html |
e2ebe1c2 UB |
4503 | @anchor{sparc-x-linux} |
4504 | @heading sparc-*-linux* | |
c6fa9728 | 4505 | |
f42974dc | 4506 | @html |
b8db17af | 4507 | <hr /> |
f42974dc | 4508 | @end html |
e2ebe1c2 UB |
4509 | @anchor{sparc64-x-solaris2} |
4510 | @heading sparc64-*-solaris2* | |
97996ede EB |
4511 | When configuring the GNU Multiple Precision Library (GMP), the MPFR |
4512 | library or the MPC library, the canonical target triplet must be specified | |
4513 | as the @command{build} parameter on the configure line. For example | |
c7392d11 | 4514 | on a Solaris 9 system: |
b3c9881c EB |
4515 | |
4516 | @smallexample | |
98797784 | 4517 | % ./configure --build=sparc64-sun-solaris2.9 --prefix=xxx |
b3c9881c EB |
4518 | @end smallexample |
4519 | ||
0dc7ee3c EB |
4520 | @html |
4521 | <hr /> | |
4522 | @end html | |
e2ebe1c2 UB |
4523 | @anchor{sparcv9-x-solaris2} |
4524 | @heading sparcv9-*-solaris2* | |
8c5cfa89 | 4525 | This is a synonym for @samp{sparc64-*-solaris2*}. |
f42974dc | 4526 | |
bcead286 BS |
4527 | @html |
4528 | <hr /> | |
4529 | @end html | |
e2ebe1c2 UB |
4530 | @anchor{c6x-x-x} |
4531 | @heading c6x-*-* | |
bcead286 BS |
4532 | The C6X family of processors. This port requires binutils-2.22 or newer. |
4533 | ||
dd552284 WL |
4534 | @html |
4535 | <hr /> | |
4536 | @end html | |
e2ebe1c2 UB |
4537 | @anchor{tilegx-*-linux} |
4538 | @heading tilegx-*-linux* | |
341c653c WL |
4539 | The TILE-Gx processor in little endian mode, running GNU/Linux. This |
4540 | port requires binutils-2.22 or newer. | |
4541 | ||
4542 | @html | |
4543 | <hr /> | |
4544 | @end html | |
4545 | @anchor{tilegxbe-*-linux} | |
4546 | @heading tilegxbe-*-linux* | |
4547 | The TILE-Gx processor in big endian mode, running GNU/Linux. This | |
4548 | port requires binutils-2.23 or newer. | |
dd552284 WL |
4549 | |
4550 | @html | |
4551 | <hr /> | |
4552 | @end html | |
e2ebe1c2 UB |
4553 | @anchor{tilepro-*-linux} |
4554 | @heading tilepro-*-linux* | |
dd552284 WL |
4555 | The TILEPro processor running GNU/Linux. This port requires |
4556 | binutils-2.22 or newer. | |
4557 | ||
0969ec7d EB |
4558 | @html |
4559 | <hr /> | |
4560 | @end html | |
4561 | @anchor{visium-x-elf} | |
4562 | @heading visium-*-elf | |
4563 | CDS VISIUMcore processor. | |
4564 | This configuration is intended for embedded systems. | |
4565 | ||
4977bab6 ZW |
4566 | @html |
4567 | <hr /> | |
4568 | @end html | |
e2ebe1c2 UB |
4569 | @anchor{x-x-vxworks} |
4570 | @heading *-*-vxworks* | |
4977bab6 | 4571 | Support for VxWorks is in flux. At present GCC supports @emph{only} the |
8a36672b | 4572 | very recent VxWorks 5.5 (aka Tornado 2.2) release, and only on PowerPC@. |
4977bab6 ZW |
4573 | We welcome patches for other architectures supported by VxWorks 5.5. |
4574 | Support for VxWorks AE would also be welcome; we believe this is merely | |
4575 | a matter of writing an appropriate ``configlette'' (see below). We are | |
4576 | not interested in supporting older, a.out or COFF-based, versions of | |
4577 | VxWorks in GCC 3. | |
4578 | ||
4579 | VxWorks comes with an older version of GCC installed in | |
4580 | @file{@var{$WIND_BASE}/host}; we recommend you do not overwrite it. | |
4581 | Choose an installation @var{prefix} entirely outside @var{$WIND_BASE}. | |
4582 | Before running @command{configure}, create the directories @file{@var{prefix}} | |
4583 | and @file{@var{prefix}/bin}. Link or copy the appropriate assembler, | |
8a36672b | 4584 | linker, etc.@: into @file{@var{prefix}/bin}, and set your @var{PATH} to |
4977bab6 ZW |
4585 | include that directory while running both @command{configure} and |
4586 | @command{make}. | |
4587 | ||
4588 | You must give @command{configure} the | |
4589 | @option{--with-headers=@var{$WIND_BASE}/target/h} switch so that it can | |
4590 | find the VxWorks system headers. Since VxWorks is a cross compilation | |
4591 | target only, you must also specify @option{--target=@var{target}}. | |
4592 | @command{configure} will attempt to create the directory | |
4593 | @file{@var{prefix}/@var{target}/sys-include} and copy files into it; | |
4594 | make sure the user running @command{configure} has sufficient privilege | |
4595 | to do so. | |
4596 | ||
4597 | GCC's exception handling runtime requires a special ``configlette'' | |
4598 | module, @file{contrib/gthr_supp_vxw_5x.c}. Follow the instructions in | |
4599 | that file to add the module to your kernel build. (Future versions of | |
daf2f129 | 4600 | VxWorks will incorporate this module.) |
4977bab6 | 4601 | |
7e081a0c AJ |
4602 | @html |
4603 | <hr /> | |
4604 | @end html | |
e2ebe1c2 UB |
4605 | @anchor{x86-64-x-x} |
4606 | @heading x86_64-*-*, amd64-*-* | |
7e081a0c | 4607 | GCC supports the x86-64 architecture implemented by the AMD64 processor |
8a36672b | 4608 | (amd64-*-* is an alias for x86_64-*-*) on GNU/Linux, FreeBSD and NetBSD@. |
7e081a0c AJ |
4609 | On GNU/Linux the default is a bi-arch compiler which is able to generate |
4610 | both 64-bit x86-64 and 32-bit x86 code (via the @option{-m32} switch). | |
4611 | ||
fbdd5d87 RO |
4612 | @html |
4613 | <hr /> | |
4614 | @end html | |
e2ebe1c2 UB |
4615 | @anchor{x86-64-x-solaris210} |
4616 | @heading x86_64-*-solaris2.1[0-9]* | |
fbdd5d87 RO |
4617 | GCC also supports the x86-64 architecture implemented by the AMD64 |
4618 | processor (@samp{amd64-*-*} is an alias for @samp{x86_64-*-*}) on | |
4619 | Solaris 10 or later. Unlike other systems, without special options a | |
4620 | bi-arch compiler is built which generates 32-bit code by default, but | |
4621 | can generate 64-bit x86-64 code with the @option{-m64} switch. Since | |
a8430f19 | 4622 | GCC 4.7, there is also a configuration that defaults to 64-bit code, but |
fbdd5d87 RO |
4623 | can generate 32-bit code with @option{-m32}. To configure and build |
4624 | this way, you have to provide all support libraries like @file{libgmp} | |
4625 | as 64-bit code, configure with @option{--target=x86_64-pc-solaris2.1x} | |
4626 | and @samp{CC=gcc -m64}. | |
4627 | ||
fd29f6ea | 4628 | @html |
b8db17af | 4629 | <hr /> |
fd29f6ea | 4630 | @end html |
e2ebe1c2 UB |
4631 | @anchor{xtensa-x-elf} |
4632 | @heading xtensa*-*-elf | |
fd29f6ea BW |
4633 | This target is intended for embedded Xtensa systems using the |
4634 | @samp{newlib} C library. It uses ELF but does not support shared | |
4635 | objects. Designed-defined instructions specified via the | |
4636 | Tensilica Instruction Extension (TIE) language are only supported | |
4637 | through inline assembly. | |
4638 | ||
4639 | The Xtensa configuration information must be specified prior to | |
e677f70c | 4640 | building GCC@. The @file{include/xtensa-config.h} header |
fd29f6ea BW |
4641 | file contains the configuration information. If you created your |
4642 | own Xtensa configuration with the Xtensa Processor Generator, the | |
4643 | downloaded files include a customized copy of this header file, | |
4644 | which you can use to replace the default header file. | |
4645 | ||
4646 | @html | |
b8db17af | 4647 | <hr /> |
fd29f6ea | 4648 | @end html |
e2ebe1c2 UB |
4649 | @anchor{xtensa-x-linux} |
4650 | @heading xtensa*-*-linux* | |
fd29f6ea BW |
4651 | This target is for Xtensa systems running GNU/Linux. It supports ELF |
4652 | shared objects and the GNU C library (glibc). It also generates | |
4653 | position-independent code (PIC) regardless of whether the | |
4654 | @option{-fpic} or @option{-fPIC} options are used. In other | |
f282ffb3 | 4655 | respects, this target is the same as the |
6d656178 | 4656 | @uref{#xtensa*-*-elf,,@samp{xtensa*-*-elf}} target. |
fd29f6ea | 4657 | |
f42974dc | 4658 | @html |
b8db17af | 4659 | <hr /> |
f42974dc | 4660 | @end html |
e2ebe1c2 UB |
4661 | @anchor{windows} |
4662 | @heading Microsoft Windows | |
aad416fb AL |
4663 | |
4664 | @subheading Intel 16-bit versions | |
ff2ce160 | 4665 | The 16-bit versions of Microsoft Windows, such as Windows 3.1, are not |
aad416fb AL |
4666 | supported. |
4667 | ||
ff2ce160 | 4668 | However, the 32-bit port has limited support for Microsoft |
aad416fb AL |
4669 | Windows 3.11 in the Win32s environment, as a target only. See below. |
4670 | ||
4671 | @subheading Intel 32-bit versions | |
ff2ce160 MS |
4672 | The 32-bit versions of Windows, including Windows 95, Windows NT, Windows |
4673 | XP, and Windows Vista, are supported by several different target | |
4674 | platforms. These targets differ in which Windows subsystem they target | |
aad416fb AL |
4675 | and which C libraries are used. |
4676 | ||
4677 | @itemize | |
ff2ce160 | 4678 | @item Cygwin @uref{#x-x-cygwin,,*-*-cygwin}: Cygwin provides a user-space |
aad416fb | 4679 | Linux API emulation layer in the Win32 subsystem. |
ff2ce160 | 4680 | @item MinGW @uref{#x-x-mingw32,,*-*-mingw32}: MinGW is a native GCC port for |
aad416fb | 4681 | the Win32 subsystem that provides a subset of POSIX. |
ff2ce160 | 4682 | @item MKS i386-pc-mks: NuTCracker from MKS. See |
aad416fb AL |
4683 | @uref{http://www.mkssoftware.com/} for more information. |
4684 | @end itemize | |
4685 | ||
4686 | @subheading Intel 64-bit versions | |
aad416fb | 4687 | GCC contains support for x86-64 using the mingw-w64 |
67afc9a6 | 4688 | runtime library, available from @uref{http://mingw-w64.org/doku.php}. |
aad416fb AL |
4689 | This library should be used with the target triple x86_64-pc-mingw32. |
4690 | ||
4691 | Presently Windows for Itanium is not supported. | |
4692 | ||
4693 | @subheading Windows CE | |
9094e001 | 4694 | Windows CE is supported as a target only on Hitachi |
aad416fb AL |
4695 | SuperH (sh-wince-pe), and MIPS (mips-wince-pe). |
4696 | ||
4697 | @subheading Other Windows Platforms | |
aad416fb AL |
4698 | GCC no longer supports Windows NT on the Alpha or PowerPC. |
4699 | ||
ff2ce160 | 4700 | GCC no longer supports the Windows POSIX subsystem. However, it does |
aad416fb AL |
4701 | support the Interix subsystem. See above. |
4702 | ||
4703 | Old target names including *-*-winnt and *-*-windowsnt are no longer used. | |
4704 | ||
ff2ce160 | 4705 | PW32 (i386-pc-pw32) support was never completed, and the project seems to |
aad416fb AL |
4706 | be inactive. See @uref{http://pw32.sourceforge.net/} for more information. |
4707 | ||
4708 | UWIN support has been removed due to a lack of maintenance. | |
4709 | ||
4710 | @html | |
4711 | <hr /> | |
4712 | @end html | |
e2ebe1c2 UB |
4713 | @anchor{x-x-cygwin} |
4714 | @heading *-*-cygwin | |
5b65d351 | 4715 | Ports of GCC are included with the |
f42974dc DW |
4716 | @uref{http://www.cygwin.com/,,Cygwin environment}. |
4717 | ||
5b65d351 GP |
4718 | GCC will build under Cygwin without modification; it does not build |
4719 | with Microsoft's C++ compiler and there are no plans to make it do so. | |
ccc1ce6e | 4720 | |
977f7997 DK |
4721 | The Cygwin native compiler can be configured to target any 32-bit x86 |
4722 | cpu architecture desired; the default is i686-pc-cygwin. It should be | |
4723 | used with as up-to-date a version of binutils as possible; use either | |
4724 | the latest official GNU binutils release in the Cygwin distribution, | |
4725 | or version 2.20 or above if building your own. | |
aad416fb | 4726 | |
aad416fb AL |
4727 | @html |
4728 | <hr /> | |
4729 | @end html | |
e2ebe1c2 UB |
4730 | @anchor{x-x-mingw32} |
4731 | @heading *-*-mingw32 | |
aad416fb | 4732 | GCC will build with and support only MinGW runtime 3.12 and later. |
fa692084 JJ |
4733 | Earlier versions of headers are incompatible with the new default semantics |
4734 | of @code{extern inline} in @code{-std=c99} and @code{-std=gnu99} modes. | |
4735 | ||
f42974dc | 4736 | @html |
b8db17af | 4737 | <hr /> |
f42974dc | 4738 | @end html |
e2ebe1c2 UB |
4739 | @anchor{older} |
4740 | @heading Older systems | |
f9047ed3 JM |
4741 | GCC contains support files for many older (1980s and early |
4742 | 1990s) Unix variants. For the most part, support for these systems | |
4743 | has not been deliberately removed, but it has not been maintained for | |
c7bdf0a6 | 4744 | several years and may suffer from bitrot. |
f9047ed3 | 4745 | |
c7bdf0a6 | 4746 | Starting with GCC 3.1, each release has a list of ``obsoleted'' systems. |
9340544b ZW |
4747 | Support for these systems is still present in that release, but |
4748 | @command{configure} will fail unless the @option{--enable-obsolete} | |
c7bdf0a6 ZW |
4749 | option is given. Unless a maintainer steps forward, support for these |
4750 | systems will be removed from the next release of GCC@. | |
f9047ed3 JM |
4751 | |
4752 | Support for old systems as hosts for GCC can cause problems if the | |
4753 | workarounds for compiler, library and operating system bugs affect the | |
161d7b59 | 4754 | cleanliness or maintainability of the rest of GCC@. In some cases, to |
f9047ed3 JM |
4755 | bring GCC up on such a system, if still possible with current GCC, may |
4756 | require first installing an old version of GCC which did work on that | |
c7bdf0a6 ZW |
4757 | system, and using it to compile a more recent GCC, to avoid bugs in the |
4758 | vendor compiler. Old releases of GCC 1 and GCC 2 are available in the | |
4759 | @file{old-releases} directory on the @uref{../mirrors.html,,GCC mirror | |
4760 | sites}. Header bugs may generally be avoided using | |
4761 | @command{fixincludes}, but bugs or deficiencies in libraries and the | |
4762 | operating system may still cause problems. | |
4763 | ||
4764 | Support for older systems as targets for cross-compilation is less | |
4765 | problematic than support for them as hosts for GCC; if an enthusiast | |
4766 | wishes to make such a target work again (including resurrecting any of | |
80521187 | 4767 | the targets that never worked with GCC 2, starting from the last |
c7bdf0a6 ZW |
4768 | version before they were removed), patches |
4769 | @uref{../contribute.html,,following the usual requirements} would be | |
4770 | likely to be accepted, since they should not affect the support for more | |
4771 | modern targets. | |
f9047ed3 JM |
4772 | |
4773 | For some systems, old versions of GNU binutils may also be useful, | |
021c4bfd | 4774 | and are available from @file{pub/binutils/old-releases} on |
2139a88a | 4775 | @uref{https://sourceware.org/mirrors.html,,sourceware.org mirror sites}. |
f9047ed3 JM |
4776 | |
4777 | Some of the information on specific systems above relates to | |
4778 | such older systems, but much of the information | |
4779 | about GCC on such systems (which may no longer be applicable to | |
f42974dc | 4780 | current GCC) is to be found in the GCC texinfo manual. |
f9047ed3 | 4781 | |
f42974dc | 4782 | @html |
b8db17af | 4783 | <hr /> |
f42974dc | 4784 | @end html |
e2ebe1c2 UB |
4785 | @anchor{elf} |
4786 | @heading all ELF targets (SVR4, Solaris 2, etc.) | |
38209993 LG |
4787 | C++ support is significantly better on ELF targets if you use the |
4788 | @uref{./configure.html#with-gnu-ld,,GNU linker}; duplicate copies of | |
4789 | inlines, vtables and template instantiations will be discarded | |
4790 | automatically. | |
f42974dc DW |
4791 | |
4792 | ||
4793 | @html | |
b8db17af | 4794 | <hr /> |
f42974dc DW |
4795 | <p> |
4796 | @end html | |
4797 | @ifhtml | |
4798 | @uref{./index.html,,Return to the GCC Installation page} | |
4799 | @end ifhtml | |
4800 | @end ifset | |
4801 | ||
73e2155a JM |
4802 | @c ***Old documentation****************************************************** |
4803 | @ifset oldhtml | |
4804 | @include install-old.texi | |
4805 | @html | |
b8db17af | 4806 | <hr /> |
73e2155a JM |
4807 | <p> |
4808 | @end html | |
4809 | @ifhtml | |
4810 | @uref{./index.html,,Return to the GCC Installation page} | |
4811 | @end ifhtml | |
4812 | @end ifset | |
4813 | ||
aed5964b JM |
4814 | @c ***GFDL******************************************************************** |
4815 | @ifset gfdlhtml | |
4816 | @include fdl.texi | |
4817 | @html | |
b8db17af | 4818 | <hr /> |
aed5964b JM |
4819 | <p> |
4820 | @end html | |
4821 | @ifhtml | |
4822 | @uref{./index.html,,Return to the GCC Installation page} | |
4823 | @end ifhtml | |
4824 | @end ifset | |
4825 | ||
f42974dc DW |
4826 | @c *************************************************************************** |
4827 | @c Part 6 The End of the Document | |
4828 | @ifinfo | |
4829 | @comment node-name, next, previous, up | |
aed5964b | 4830 | @node Concept Index, , GNU Free Documentation License, Top |
f42974dc DW |
4831 | @end ifinfo |
4832 | ||
4833 | @ifinfo | |
4834 | @unnumbered Concept Index | |
4835 | ||
4836 | @printindex cp | |
4837 | ||
4838 | @contents | |
4839 | @end ifinfo | |
4840 | @bye |