1 \input texinfo.tex @c -*-texinfo-*-
4 @setfilename gccinstall.info
5 @settitle Installing GCC
10 @c Specify title for specific html page
12 @settitle Installing GCC
15 @settitle Host/Target specific installation notes for GCC
17 @ifset prerequisiteshtml
18 @settitle Prerequisites for GCC
21 @settitle Downloading GCC
24 @settitle Installing GCC: Configuration
27 @settitle Installing GCC: Building
30 @settitle Installing GCC: Testing
32 @ifset finalinstallhtml
33 @settitle Installing GCC: Final installation
36 @settitle Installing GCC: Binaries
39 @settitle Installing GCC: Old documentation
42 @settitle Installing GCC: GNU Free Documentation License
45 @c Copyright (C) 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
46 @c 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
47 @c *** Converted to texinfo by Dean Wakerley, dean@wakerley.com
49 @c Include everything if we're not making html
53 @set prerequisiteshtml
64 @c Part 2 Summary Description and Copyright
66 Copyright @copyright{} 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
67 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
69 Permission is granted to copy, distribute and/or modify this document
70 under the terms of the GNU Free Documentation License, Version 1.2 or
71 any later version published by the Free Software Foundation; with no
72 Invariant Sections, the Front-Cover texts being (a) (see below), and
73 with the Back-Cover Texts being (b) (see below). A copy of the
74 license is included in the section entitled ``@uref{./gfdl.html,,GNU
75 Free Documentation License}''.
77 (a) The FSF's Front-Cover Text is:
81 (b) The FSF's Back-Cover Text is:
83 You have freedom to copy and modify this GNU Manual, like GNU
84 software. Copies published by the Free Software Foundation raise
85 funds for GNU development.
91 @c Part 3 Titlepage and Copyright
94 @comment The title is printed in a large font.
95 @center @titlefont{Installing GCC}
97 @c The following two commands start the copyright page.
99 @vskip 0pt plus 1filll
103 @c Part 4 Top node and Master Menu
106 @comment node-name, next, Previous, up
109 * Installing GCC:: This document describes the generic installation
110 procedure for GCC as well as detailing some target
111 specific installation instructions.
113 * Specific:: Host/target specific installation notes for GCC.
114 * Binaries:: Where to get pre-compiled binaries.
116 * Old:: Old installation documentation.
118 * GNU Free Documentation License:: How you can copy and share this manual.
119 * Concept Index:: This index has two entries.
123 @c Part 5 The Body of the Document
124 @c ***Installing GCC**********************************************************
126 @comment node-name, next, previous, up
127 @node Installing GCC, Binaries, , Top
131 @chapter Installing GCC
134 The latest version of this document is always available at
135 @uref{http://gcc.gnu.org/install/,,http://gcc.gnu.org/install/}.
137 This document describes the generic installation procedure for GCC as well
138 as detailing some target specific installation instructions.
140 GCC includes several components that previously were separate distributions
141 with their own installation instructions. This document supersedes all
142 package specific installation instructions.
144 @emph{Before} starting the build/install procedure please check the
146 @ref{Specific, host/target specific installation notes}.
149 @uref{specific.html,,host/target specific installation notes}.
151 We recommend you browse the entire generic installation instructions before
154 Lists of successful builds for released versions of GCC are
155 available at @uref{http://gcc.gnu.org/buildstat.html}.
156 These lists are updated as new information becomes available.
158 The installation procedure itself is broken into five steps.
163 * Downloading the source::
166 * Testing:: (optional)
173 @uref{prerequisites.html,,Prerequisites}
175 @uref{download.html,,Downloading the source}
177 @uref{configure.html,,Configuration}
179 @uref{build.html,,Building}
181 @uref{test.html,,Testing} (optional)
183 @uref{finalinstall.html,,Final install}
187 Please note that GCC does not support @samp{make uninstall} and probably
188 won't do so in the near future as this would open a can of worms. Instead,
189 we suggest that you install GCC into a directory of its own and simply
190 remove that directory when you do not need that specific version of GCC
191 any longer, and, if shared libraries are installed there as well, no
192 more binaries exist that use them.
195 There are also some @uref{old.html,,old installation instructions},
196 which are mostly obsolete but still contain some information which has
197 not yet been merged into the main part of this manual.
205 @uref{./index.html,,Return to the GCC Installation page}
211 @c ***Prerequisites**************************************************
213 @comment node-name, next, previous, up
214 @node Prerequisites, Downloading the source, , Installing GCC
216 @ifset prerequisiteshtml
218 @chapter Prerequisites
220 @cindex Prerequisites
222 GCC requires that various tools and packages be available for use in the
223 build procedure. Modifying GCC sources requires additional tools
226 @heading Tools/packages necessary for building GCC
228 @item ISO C90 compiler
229 Necessary to bootstrap the GCC package, although versions of GCC prior
230 to 3.4 also allow bootstrapping with a traditional (K&R) C compiler.
232 To make all languages in a cross-compiler or other configuration where
233 3-stage bootstrap is not performed, you need to start with an existing
234 GCC binary (version 2.95 or later) because source code for language
235 frontends other than C might use GCC extensions.
239 In order to build the Ada compiler (GNAT) you must already have GNAT
240 installed because portions of the Ada frontend are written in Ada (with
241 GNAT extensions.) Refer to the Ada installation instructions for more
242 specific information.
244 @item A ``working'' POSIX compatible shell, or GNU bash
246 Necessary when running @command{configure} because some
247 @command{/bin/sh} shells have bugs and may crash when configuring the
248 target libraries. In other cases, @command{/bin/sh} or even some
249 @command{ksh} have disastrous corner-case performance problems. This
250 can cause target @command{configure} runs to literally take days to
251 complete in some cases.
253 So on some platforms @command{/bin/ksh} is sufficient, on others it
254 isn't. See the host/target specific instructions for your platform, or
255 use @command{bash} to be sure. Then set @env{CONFIG_SHELL} in your
256 environment to your ``good'' shell prior to running
257 @command{configure}/@command{make}.
261 Necessary in some circumstances, optional in others. See the
262 host/target specific instructions for your platform for the exact
265 @item gzip version 1.2.4 (or later) or
266 @itemx bzip2 version 1.0.2 (or later)
268 Necessary to uncompress GCC @command{tar} files when source code is
269 obtained via FTP mirror sites.
271 @item GNU tar version 1.12 (or later)
273 Necessary (only on some platforms) to untar the source code. Many
274 systems' @command{tar} programs will also work, only try GNU
275 @command{tar} if you have problems.
280 @heading Tools/packages necessary for modifying GCC
283 @item autoconf version 2.13 (NO earlier or later versions) and
284 @itemx GNU m4 version 1.4 (or later)
286 Necessary when modifying @file{configure.in}, @file{aclocal.m4}, etc.@:
287 to regenerate @file{configure} and @file{config.in} files
289 @item automake version ???
291 Necessary when modifying a @file{Makefile.am} file to regenerate its
292 associated @file{Makefile.in}
294 @item gperf version 2.7.2 (or later)
296 Necessary when modifying @command{gperf} input files, e.g.@:
297 @file{gcc/cp/cfns.gperf} to regenerate its associated header file, e.g.@:
298 @file{gcc/cp/cfns.h}.
300 @item expect version ???
301 @itemx tcl version ???
302 @itemx dejagnu version ???
304 Necessary to run the GCC testsuite.
306 @item autogen version 5.5.4 (or later) and
307 @itemx guile version 1.4.1 (or later)
309 Necessary to regenerate @file{fixinc/fixincl.x} from
310 @file{fixinc/inclhack.def} and @file{fixinc/*.tpl}.
312 Necessary to run the @file{fixinc} @command{make check}.
314 Necessary to regenerate the top level @file{Makefile.am} files from
315 @file{Makefile.tpl} and @file{Makefile.def}.
317 @item GNU Bison version 1.28 (or later)
318 Berkeley @command{yacc} (@command{byacc}) is also reported to work other
321 Necessary when modifying @file{*.y} files.
323 Necessary to build GCC during development because the generated output
324 files are not included in the CVS repository. They are included in
327 @item Flex version 2.5.4 (or later)
329 Necessary when modifying @file{*.l} files.
331 Necessary to build GCC during development because the generated output
332 files are not included in the CVS repository. They are included in
335 @item Texinfo version 4.2 (or later)
337 Necessary for running @command{makeinfo} when modifying @file{*.texi}
338 files to test your changes.
340 Necessary to build GCC documentation during development because the
341 generated output files are not included in the CVS repository. They are
342 included in releases.
344 @item @TeX{} (any working version)
346 Necessary for running @command{texi2dvi}, used when running
347 @command{make dvi} to create DVI files.
349 @item cvs version 1.10 (or later)
350 @itemx ssh (any version)
352 Necessary to access the CVS repository. Public releases and weekly
353 snapshots of the development sources are also available via FTP.
355 @item perl version 5.6.1 (or later)
357 Necessary when regenerating @file{Makefile} dependencies in libiberty.
358 Necessary when regenerating something with intl??? (pod2man???)
361 @item GNU diffutils version 2.7 (or later)
363 Necessary when creating changes to GCC source code to submit for review.
365 @item patch version 2.5.4 (or later)
367 Necessary when applying patches, created with @command{diff}, to one's
377 @uref{./index.html,,Return to the GCC Installation page}
381 @c ***Downloading the source**************************************************
383 @comment node-name, next, previous, up
384 @node Downloading the source, Configuration, Prerequisites, Installing GCC
388 @chapter Downloading GCC
390 @cindex Downloading GCC
391 @cindex Downloading the Source
393 GCC is distributed via @uref{http://gcc.gnu.org/cvs.html,,CVS} and FTP
394 tarballs compressed with @command{gzip} or
395 @command{bzip2}. It is possible to download a full distribution or specific
398 Please refer to our @uref{http://gcc.gnu.org/releases.html,,releases web page}
399 for information on how to obtain GCC@.
401 The full distribution includes the C, C++, Objective-C, Fortran, Java,
402 and Ada (in case of GCC 3.1 and later) compilers. The full distribution
403 also includes runtime libraries for C++, Objective-C, Fortran, and Java.
404 In GCC 3.0 and later versions, GNU compiler testsuites are also included
405 in the full distribution.
407 If you choose to download specific components, you must download the core
408 GCC distribution plus any language specific distributions you wish to
409 use. The core distribution includes the C language front end as well as the
410 shared components. Each language has a tarball which includes the language
411 front end as well as the language runtime (when appropriate).
413 Unpack the core distribution as well as any language specific
414 distributions in the same directory.
416 If you also intend to build binutils (either to upgrade an existing
417 installation or for use in place of the corresponding tools of your
418 OS), unpack the binutils distribution either in the same directory or
419 a separate one. In the latter case, add symbolic links to any
420 components of the binutils you intend to build alongside the compiler
421 (@file{bfd}, @file{binutils}, @file{gas}, @file{gprof}, @file{ld},
422 @file{opcodes}, @dots{}) to the directory containing the GCC sources.
429 @uref{./index.html,,Return to the GCC Installation page}
433 @c ***Configuration***********************************************************
435 @comment node-name, next, previous, up
436 @node Configuration, Building, Downloading the source, Installing GCC
440 @chapter Installing GCC: Configuration
442 @cindex Configuration
443 @cindex Installing GCC: Configuration
445 Like most GNU software, GCC must be configured before it can be built.
446 This document describes the recommended configuration procedure
447 for both native and cross targets.
449 We use @var{srcdir} to refer to the toplevel source directory for
450 GCC; we use @var{objdir} to refer to the toplevel build/object directory.
452 If you obtained the sources via CVS, @var{srcdir} must refer to the top
453 @file{gcc} directory, the one where the @file{MAINTAINERS} can be found,
454 and not its @file{gcc} subdirectory, otherwise the build will fail.
456 If either @var{srcdir} or @var{objdir} is located on an automounted NFS
457 file system, the shell's built-in @command{pwd} command will return
458 temporary pathnames. Using these can lead to various sorts of build
459 problems. To avoid this issue, set the @env{PWDCMD} environment
460 variable to an automounter-aware @command{pwd} command, e.g.,
461 @command{pawd} or @samp{amq -w}, during the configuration and build
464 First, we @strong{highly} recommend that GCC be built into a
465 separate directory than the sources which does @strong{not} reside
466 within the source tree. This is how we generally build GCC; building
467 where @var{srcdir} == @var{objdir} should still work, but doesn't
468 get extensive testing; building where @var{objdir} is a subdirectory
469 of @var{srcdir} is unsupported.
471 If you have previously built GCC in the same directory for a
472 different target machine, do @samp{make distclean} to delete all files
473 that might be invalid. One of the files this deletes is @file{Makefile};
474 if @samp{make distclean} complains that @file{Makefile} does not exist
475 or issues a message like ``don't know how to make distclean'' it probably
476 means that the directory is already suitably clean. However, with the
477 recommended method of building in a separate @var{objdir}, you should
478 simply use a different @var{objdir} for each target.
480 Second, when configuring a native system, either @command{cc} or
481 @command{gcc} must be in your path or you must set @env{CC} in
482 your environment before running configure. Otherwise the configuration
485 Note that the bootstrap compiler and the resulting GCC must be link
486 compatible, else the bootstrap will fail with linker errors about
487 incompatible object file formats. Several multilibed targets are
488 affected by this requirement, see
490 @ref{Specific, host/target specific installation notes}.
493 @uref{specific.html,,host/target specific installation notes}.
501 % @var{srcdir}/configure [@var{options}] [@var{target}]
505 @heading Target specification
508 GCC has code to correctly determine the correct value for @var{target}
509 for nearly all native systems. Therefore, we highly recommend you not
510 provide a configure target when configuring a native compiler.
513 @var{target} must be specified as @option{--target=@var{target}}
514 when configuring a cross compiler; examples of valid targets would be
515 i960-rtems, m68k-coff, sh-elf, etc.
518 Specifying just @var{target} instead of @option{--target=@var{target}}
519 implies that the host defaults to @var{target}.
523 @heading Options specification
525 Use @var{options} to override several configure time options for
526 GCC@. A list of supported @var{options} follows; @samp{configure
527 --help} may list other options, but those not listed below may not
528 work and should not normally be used.
531 @item --prefix=@var{dirname}
532 Specify the toplevel installation
533 directory. This is the recommended way to install the tools into a directory
534 other than the default. The toplevel installation directory defaults to
537 We @strong{highly} recommend against @var{dirname} being the same or a
538 subdirectory of @var{objdir} or vice versa. If specifying a directory
539 beneath a user's home directory tree, some shells will not expand
540 @var{dirname} correctly if it contains the @samp{~} metacharacter; use
543 These additional options control where certain parts of the distribution
544 are installed. Normally you should not need to use these options.
546 @item --exec-prefix=@var{dirname}
547 Specify the toplevel installation directory for architecture-dependent
548 files. The default is @file{@var{prefix}}.
550 @item --bindir=@var{dirname}
551 Specify the installation directory for the executables called by users
552 (such as @command{gcc} and @command{g++}). The default is
553 @file{@var{exec-prefix}/bin}.
555 @item --libdir=@var{dirname}
556 Specify the installation directory for object code libraries and
557 internal parts of GCC@. The default is @file{@var{exec-prefix}/lib}.
559 @item --with-slibdir=@var{dirname}
560 Specify the installation directory for the shared libgcc library. The
561 default is @file{@var{libdir}}.
563 @item --infodir=@var{dirname}
564 Specify the installation directory for documentation in info format.
565 The default is @file{@var{prefix}/info}.
567 @item --datadir=@var{dirname}
568 Specify the installation directory for some architecture-independent
569 data files referenced by GCC@. The default is @file{@var{prefix}/share}.
571 @item --mandir=@var{dirname}
572 Specify the installation directory for manual pages. The default is
573 @file{@var{prefix}/man}. (Note that the manual pages are only extracts from
574 the full GCC manuals, which are provided in Texinfo format. The
575 @command{g77} manpage is unmaintained and may be out of date; the others
576 are derived by an automatic conversion process from parts of the full
579 @item --with-gxx-include-dir=@var{dirname}
581 the installation directory for G++ header files. The default is
582 @file{@var{prefix}/include/g++-v3}.
586 @item --program-prefix=@var{prefix}
587 GCC supports some transformations of the names of its programs when
588 installing them. This option prepends @var{prefix} to the names of
589 programs to install in @var{bindir} (see above). For example, specifying
590 @option{--program-prefix=foo-} would result in @samp{gcc}
591 being installed as @file{/usr/local/bin/foo-gcc}.
593 @item --program-suffix=@var{suffix}
594 Appends @var{suffix} to the names of programs to install in @var{bindir}
595 (see above). For example, specifying @option{--program-suffix=-3.1}
596 would result in @samp{gcc} being installed as
597 @file{/usr/local/bin/gcc-3.1}.
599 @item --program-transform-name=@var{pattern}
600 Applies the @samp{sed} script @var{pattern} to be applied to the names
601 of programs to install in @var{bindir} (see above). @var{pattern} has to
602 consist of one or more basic @samp{sed} editing commands, separated by
603 semicolons. For example, if you want the @samp{gcc} program name to be
604 transformed to the installed program @file{/usr/local/bin/myowngcc} and
605 the @samp{g++} program name to be transformed to
606 @file{/usr/local/bin/gspecial++} without changing other program names,
607 you could use the pattern
608 @option{--program-transform-name='s/^gcc$/myowngcc/; s/^g++$/gspecial++/'}
609 to achieve this effect.
611 All three options can be combined and used together, resulting in more
612 complex conversion patterns. As a basic rule, @var{prefix} (and
613 @var{suffix}) are prepended (appended) before further transformations
614 can happen with a special transformation script @var{pattern}.
616 As currently implemented, this option only takes effect for native
617 builds; cross compiler binaries' names are not transformed even when a
618 transformation is explicitly asked for by one of these options.
620 For native builds, some of the installed programs are also installed
621 with the target alias in front of their name, as in
622 @samp{i686-pc-linux-gnu-gcc}. All of the above transformations happen
623 before the target alias is prepended to the name - so, specifying
624 @option{--program-prefix=foo-} and @option{program-suffix=-3.1}, the
625 resulting binary would be installed as
626 @file{/usr/local/bin/i686-pc-linux-gnu-foo-gcc-3.1}.
628 As a last shortcoming, none of the installed Ada programs are
629 transformed yet, which will be fixed in some time.
631 @item --with-local-prefix=@var{dirname}
633 installation directory for local include files. The default is
634 @file{/usr/local}. Specify this option if you want the compiler to
635 search directory @file{@var{dirname}/include} for locally installed
636 header files @emph{instead} of @file{/usr/local/include}.
638 You should specify @option{--with-local-prefix} @strong{only} if your
639 site has a different convention (not @file{/usr/local}) for where to put
642 The default value for @option{--with-local-prefix} is @file{/usr/local}
643 regardless of the value of @option{--prefix}. Specifying
644 @option{--prefix} has no effect on which directory GCC searches for
645 local header files. This may seem counterintuitive, but actually it is
648 The purpose of @option{--prefix} is to specify where to @emph{install
649 GCC}. The local header files in @file{/usr/local/include}---if you put
650 any in that directory---are not part of GCC@. They are part of other
651 programs---perhaps many others. (GCC installs its own header files in
652 another directory which is based on the @option{--prefix} value.)
654 Both the local-prefix include directory and the GCC-prefix include
655 directory are part of GCC's "system include" directories. Although these
656 two directories are not fixed, they need to be searched in the proper
657 order for the correct processing of the include_next directive. The
658 local-prefix include directory is searched before the GCC-prefix
659 include directory. Another characteristic of system include directories
660 is that pedantic warnings are turned off for headers in these directories.
662 Some autoconf macros add @option{-I @var{directory}} options to the
663 compiler command line, to ensure that directories containing installed
664 packages' headers are searched. When @var{directory} is one of GCC's
665 system include directories, GCC will ignore the option so that system
666 directories continue to be processed in the correct order. This
667 may result in a search order different from what was specified but the
668 directory will still be searched.
670 GCC automatically searches for ordinary libraries using
671 @env{GCC_EXEC_PREFIX}. Thus, when the same installation prefix is
672 used for both GCC and packages, GCC will automatically search for
673 both headers and libraries. This provides a configuration that is
674 easy to use. GCC behaves in a manner similar to that when it is
675 installed as a system compiler in @file{/usr}.
677 Sites that need to install multiple versions of GCC may not want to
678 use the above simple configuration. It is possible to use the
679 @option{--program-prefix}, @option{--program-suffix} and
680 @option{--program-transform-name} options to install multiple versions
681 into a single directory, but it may be simpler to use different prefixes
682 and the @option{--with-local-prefix} option to specify the location of the
683 site-specific files for each version. It will then be necessary for
684 users to specify explicitly the location of local site libraries
685 (e.g., with @env{LIBRARY_PATH}).
687 The same value can be used for both @option{--with-local-prefix} and
688 @option{--prefix} provided it is not @file{/usr}. This can be used
689 to avoid the default search of @file{/usr/local/include}.
691 @strong{Do not} specify @file{/usr} as the @option{--with-local-prefix}!
692 The directory you use for @option{--with-local-prefix} @strong{must not}
693 contain any of the system's standard header files. If it did contain
694 them, certain programs would be miscompiled (including GNU Emacs, on
695 certain targets), because this would override and nullify the header
696 file corrections made by the @command{fixincludes} script.
698 Indications are that people who use this option use it based on mistaken
699 ideas of what it is for. People use it as if it specified where to
700 install part of GCC@. Perhaps they make this assumption because
701 installing GCC creates the directory.
703 @item --enable-shared[=@var{package}[,@dots{}]]
704 Build shared versions of libraries, if shared libraries are supported on
705 the target platform. Unlike GCC 2.95.x and earlier, shared libraries
706 are enabled by default on all platforms that support shared libraries,
707 except for @samp{libobjc} which is built as a static library only by
710 If a list of packages is given as an argument, build shared libraries
711 only for the listed packages. For other packages, only static libraries
712 will be built. Package names currently recognized in the GCC tree are
713 @samp{libgcc} (also known as @samp{gcc}), @samp{libstdc++} (not
714 @samp{libstdc++-v3}), @samp{libffi}, @samp{zlib}, @samp{boehm-gc} and
715 @samp{libjava}. Note that @samp{libobjc} does not recognize itself by
716 any name, so, if you list package names in @option{--enable-shared},
717 you will only get static Objective-C libraries. @samp{libf2c} and
718 @samp{libiberty} do not support shared libraries at all.
720 Use @option{--disable-shared} to build only static libraries. Note that
721 @option{--disable-shared} does not accept a list of package names as
722 argument, only @option{--enable-shared} does.
724 @item @anchor{with-gnu-as}--with-gnu-as
725 Specify that the compiler should assume that the
726 assembler it finds is the GNU assembler. However, this does not modify
727 the rules to find an assembler and will result in confusion if the
728 assembler found is not actually the GNU assembler. (Confusion may also
729 result if the compiler finds the GNU assembler but has not been
730 configured with @option{--with-gnu-as}.) If you have more than one
731 assembler installed on your system, you may want to use this option in
732 connection with @option{--with-as=@var{pathname}}.
734 The following systems are the only ones where it makes a difference
735 whether you use the GNU assembler. On any other system,
736 @option{--with-gnu-as} has no effect.
739 @item @samp{hppa1.0-@var{any}-@var{any}}
740 @item @samp{hppa1.1-@var{any}-@var{any}}
741 @item @samp{i386-@var{any}-sysv}
742 @item @samp{m68k-bull-sysv}
743 @item @samp{m68k-hp-hpux}
744 @item @samp{m68000-hp-hpux}
745 @item @samp{m68000-att-sysv}
746 @item @samp{@var{any}-lynx-lynxos}
747 @item @samp{mips-@var{any}}
750 On the systems listed above (except for the HP-PA, for ISC on the
751 386, and for @samp{mips-sgi-irix5.*}), if you use the GNU assembler,
752 you should also use the GNU linker (and specify @option{--with-gnu-ld}).
754 @item --with-as=@var{pathname}
756 compiler should use the assembler pointed to by @var{pathname}, rather
757 than the one found by the standard rules to find an assembler, which
762 @file{@var{exec_prefix}/lib/gcc-lib/@var{target}/@var{version}}
763 directory, where @var{exec_prefix} defaults to @var{prefix} which
764 defaults to @file{/usr/local} unless overridden by the
765 @option{--prefix=@var{pathname}} switch described above. @var{target} is the
766 target system triple, such as @samp{sparc-sun-solaris2.7}, and
767 @var{version} denotes the GCC version, such as 3.0.
769 Check operating system specific directories (e.g.@: @file{/usr/ccs/bin} on
772 Note that these rules do not check for the value of @env{PATH}. You may
773 want to use @option{--with-as} if no assembler is installed in the
774 directories listed above, or if you have multiple assemblers installed
775 and want to choose one that is not found by the above rules.
777 @item @anchor{with-gnu-ld}--with-gnu-ld
778 Same as @uref{#with-gnu-as,,@option{--with-gnu-as}}
782 @item --with-ld=@var{pathname}
784 @option{--with-as}, but for the linker.
787 Specify that stabs debugging
788 information should be used instead of whatever format the host normally
789 uses. Normally GCC uses the same debug format as the host system.
791 On MIPS based systems and on Alphas, you must specify whether you want
792 GCC to create the normal ECOFF debugging format, or to use BSD-style
793 stabs passed through the ECOFF symbol table. The normal ECOFF debug
794 format cannot fully handle languages other than C@. BSD stabs format can
795 handle other languages, but it only works with the GNU debugger GDB@.
797 Normally, GCC uses the ECOFF debugging format by default; if you
798 prefer BSD stabs, specify @option{--with-stabs} when you configure GCC@.
800 No matter which default you choose when you configure GCC, the user
801 can use the @option{-gcoff} and @option{-gstabs+} options to specify explicitly
802 the debug format for a particular compilation.
804 @option{--with-stabs} is meaningful on the ISC system on the 386, also, if
805 @option{--with-gas} is used. It selects use of stabs debugging
806 information embedded in COFF output. This kind of debugging information
807 supports C++ well; ordinary COFF debugging information does not.
809 @option{--with-stabs} is also meaningful on 386 systems running SVR4. It
810 selects use of stabs debugging information embedded in ELF output. The
811 C++ compiler currently (2.6.0) does not support the DWARF debugging
812 information normally used on 386 SVR4 platforms; stabs provide a
813 workable alternative. This requires gas and gdb, as the normal SVR4
814 tools can not generate or interpret stabs.
816 @item --disable-multilib
817 Specify that multiple target
818 libraries to support different target variants, calling
819 conventions, etc should not be built. The default is to build a
820 predefined set of them.
822 Some targets provide finer-grained control over which multilibs are built
823 (e.g., @option{--disable-softfloat}):
829 fpu, 26bit, underscore, interwork, biendian, nofmult.
832 softfloat, m68881, m68000, m68020.
835 single-float, biendian, softfloat.
837 @item powerpc*-*-*, rs6000*-*-*
838 aix64, pthread, softfloat, powercpu, powerpccpu, powerpcos, biendian,
843 @item --enable-threads
844 Specify that the target
845 supports threads. This affects the Objective-C compiler and runtime
846 library, and exception handling for other languages like C++ and Java.
847 On some systems, this is the default.
849 In general, the best (and, in many cases, the only known) threading
850 model available will be configured for use. Beware that on some
851 systems, gcc has not been taught what threading models are generally
852 available for the system. In this case, @option{--enable-threads} is an
853 alias for @option{--enable-threads=single}.
855 @item --disable-threads
856 Specify that threading support should be disabled for the system.
857 This is an alias for @option{--enable-threads=single}.
859 @item --enable-threads=@var{lib}
861 @var{lib} is the thread support library. This affects the Objective-C
862 compiler and runtime library, and exception handling for other languages
863 like C++ and Java. The possibilities for @var{lib} are:
871 Ada tasking support. For non-Ada programs, this setting is equivalent
872 to @samp{single}. When used in conjunction with the Ada run time, it
873 causes GCC to use the same thread primitives as Ada uses. This option
874 is necessary when using both Ada and the back end exception handling,
875 which is the default for most Ada targets.
877 Generic MACH thread support, known to work on NeXTSTEP@. (Please note
878 that the file needed to support this configuration, @file{gthr-mach.h}, is
879 missing and thus this setting will cause a known bootstrap failure.)
881 This is an alias for @samp{single}.
883 Generic POSIX thread support.
885 Same as @samp{posix} on arm*-*-linux*, *-*-chorusos* and *-*-freebsd*
886 only. A future release of gcc might remove this alias or extend it
889 RTEMS thread support.
891 Disable thread support, should work for all platforms.
893 Sun Solaris 2 thread support.
895 VxWorks thread support.
897 Microsoft Win32 API thread support.
900 @item --with-cpu=@var{cpu}
901 Specify which cpu variant the compiler should generate code for by default.
902 @var{cpu} will be used as the default value of the @option{-mcpu=} switch.
903 This option is only supported on some targets, including ARM, i386, PowerPC,
906 @item --with-schedule=@var{cpu}
907 @itemx --with-arch=@var{cpu}
908 @itemx --with-tune=@var{cpu}
909 @itemx --with-abi=@var{abi}
910 @itemx --with-float=@var{type}
911 These configure options provide default values for the @option{-mschedule=},
912 @option{-march=}, @option{-mtune=}, and @option{-mabi=} options and for
913 @option{-mhard-float} or @option{-msoft-float}. As with @option{--with-cpu},
914 which switches will be accepted and acceptable values of the arguments depend
917 @item --enable-altivec
918 Specify that the target supports AltiVec vector enhancements. This
919 option will adjust the ABI for AltiVec enhancements, as well as generate
920 AltiVec code when appropriate. This option is only available for
923 @item --enable-target-optspace
925 libraries should be optimized for code space instead of code speed.
926 This is the default for the m32r platform.
929 Specify that a user visible @command{cpp} program should not be installed.
931 @item --with-cpp-install-dir=@var{dirname}
932 Specify that the user visible @command{cpp} program should be installed
933 in @file{@var{prefix}/@var{dirname}/cpp}, in addition to @var{bindir}.
935 @item --enable-initfini-array
936 Force the use of sections @code{.init_array} and @code{.fini_array}
937 (instead of @code{.init} and @code{.fini}) for constructors and
938 destructors. Option @option{--disable-initfini-array} has the
939 opposite effect. If neither option is specified, the configure script
940 will try to guess whether the @code{.init_array} and
941 @code{.fini_array} sections are supported and, if they are, use them.
943 @item --enable-maintainer-mode
945 regenerate the GCC master message catalog @file{gcc.pot} are normally
946 disabled. This is because it can only be rebuilt if the complete source
947 tree is present. If you have changed the sources and want to rebuild the
948 catalog, configuring with @option{--enable-maintainer-mode} will enable
949 this. Note that you need a recent version of the @code{gettext} tools
952 @item --enable-version-specific-runtime-libs
954 that runtime libraries should be installed in the compiler specific
955 subdirectory (@file{@var{libsubdir}}) rather than the usual places. In
956 addition, @samp{libstdc++}'s include files will be installed in
957 @file{@var{libsubdir}/include/g++} unless you overruled it by using
958 @option{--with-gxx-include-dir=@var{dirname}}. Using this option is
959 particularly useful if you intend to use several versions of GCC in
960 parallel. This is currently supported by @samp{libf2c} and
961 @samp{libstdc++}, and is the default for @samp{libobjc} which cannot be
962 changed in this case.
964 @item --enable-languages=@var{lang1},@var{lang2},@dots{}
965 Specify that only a particular subset of compilers and
966 their runtime libraries should be built. For a list of valid values for
967 @var{langN} you can issue the following command in the
968 @file{gcc} directory of your GCC source tree:@*
970 grep language= */config-lang.in
972 Currently, you can use any of the following:
973 @code{ada}, @code{c}, @code{c++}, @code{f77}, @code{java}, @code{objc}.
974 Building the Ada compiler has special requirements, see below.@*
975 If you do not pass this flag, all languages available in the @file{gcc}
976 sub-tree will be configured. Re-defining @code{LANGUAGES} when calling
977 @samp{make bootstrap} @strong{does not} work anymore, as those
978 language sub-directories might not have been configured!
980 @item --disable-libgcj
981 Specify that the run-time libraries
982 used by GCJ should not be built. This is useful in case you intend
983 to use GCJ with some other run-time, or you're going to install it
984 separately, or it just happens not to build on your particular
985 machine. In general, if the Java front end is enabled, the GCJ
986 libraries will be enabled too, unless they're known to not work on
987 the target platform. If GCJ is enabled but @samp{libgcj} isn't built, you
988 may need to port it; in this case, before modifying the top-level
989 @file{configure.in} so that @samp{libgcj} is enabled by default on this platform,
990 you may use @option{--enable-libgcj} to override the default.
993 Specify that the compiler should
994 use DWARF 2 debugging information as the default.
996 @item --enable-win32-registry
997 @itemx --enable-win32-registry=@var{key}
998 @itemx --disable-win32-registry
999 The @option{--enable-win32-registry} option enables Windows-hosted GCC
1000 to look up installations paths in the registry using the following key:
1003 @code{HKEY_LOCAL_MACHINE\SOFTWARE\Free Software Foundation\@var{key}}
1006 @var{key} defaults to GCC version number, and can be overridden by the
1007 @option{--enable-win32-registry=@var{key}} option. Vendors and distributors
1008 who use custom installers are encouraged to provide a different key,
1009 perhaps one comprised of vendor name and GCC version number, to
1010 avoid conflict with existing installations. This feature is enabled
1011 by default, and can be disabled by @option{--disable-win32-registry}
1012 option. This option has no effect on the other hosts.
1015 Specify that the machine does not have a floating point unit. This
1016 option only applies to @samp{m68k-sun-sunos@var{n}}. On any other
1017 system, @option{--nfp} has no effect.
1019 @item --enable-werror
1020 @itemx --disable-werror
1021 @itemx --enable-werror=yes
1022 @itemx --enable-werror=no
1023 When you specify this option, it controls whether certain files in the
1024 compiler are built with @option{-Werror} in bootstrap stage2 and later.
1025 If you don't specify it, @option{-Werror} is turned on for the main
1026 development trunk. However it defaults to off for release branches and
1027 final releases. The specific files which get @option{-Werror} are
1028 controlled by the Makefiles.
1030 @item --enable-checking
1031 @itemx --enable-checking=@var{list}
1032 When you specify this option, the compiler is built to perform checking
1033 of tree node types when referencing fields of that node, and some other
1034 internal consistency checks. This does not change the generated code,
1035 but adds error checking within the compiler. This will slow down the
1036 compiler and may only work properly if you are building the compiler
1037 with GCC@. This is on by default when building from CVS or snapshots,
1038 but off for releases. More control over the checks may be had by
1039 specifying @var{list}; the categories of checks available are
1040 @samp{misc}, @samp{tree}, @samp{gc}, @samp{rtl}, @samp{rtlflag} and
1042 default when @var{list} is not specified is @samp{misc,tree,gc,rtlflag}; the
1043 checks @samp{rtl} and @samp{gcac} are very expensive.
1045 @item --enable-coverage
1046 @item --enable-coverage=@var{level}
1047 With this option, the compiler is built to collect self coverage
1048 information, every time it is run. This is for internal development
1049 purposes, and only works when the compiler is being built with gcc. The
1050 @var{level} argument controls whether the compiler is built optimized or
1051 not, values are @samp{opt} and @samp{noopt}. For coverage analysis you
1052 want to disable optimization, for performance analysis you want to
1053 enable optimization. When coverage is enabled, the default level is
1054 without optimization.
1057 @itemx --disable-nls
1058 The @option{--enable-nls} option enables Native Language Support (NLS),
1059 which lets GCC output diagnostics in languages other than American
1060 English. Native Language Support is enabled by default if not doing a
1061 canadian cross build. The @option{--disable-nls} option disables NLS@.
1063 @item --with-included-gettext
1064 If NLS is enabled, the @option{--with-included-gettext} option causes the build
1065 procedure to prefer its copy of GNU @command{gettext}.
1067 @item --with-catgets
1068 If NLS is enabled, and if the host lacks @code{gettext} but has the
1069 inferior @code{catgets} interface, the GCC build procedure normally
1070 ignores @code{catgets} and instead uses GCC's copy of the GNU
1071 @code{gettext} library. The @option{--with-catgets} option causes the
1072 build procedure to use the host's @code{catgets} in this situation.
1074 @item --with-libiconv-prefix=@var{dir}
1075 Search for libiconv header files in @file{@var{dir}/include} and
1076 libiconv library files in @file{@var{dir}/lib}.
1078 @item --with-system-zlib
1079 Use installed zlib rather than that included with GCC@. This option
1080 only applies if the Java front end is being built.
1082 @item --enable-obsolete
1083 Enable configuration for an obsoleted system. If you attempt to
1084 configure GCC for a system (build, host, or target) which has been
1085 obsoleted, and you do not specify this flag, configure will halt with an
1088 All support for systems which have been obsoleted in one release of GCC
1089 is removed entirely in the next major release, unless someone steps
1090 forward to maintain the port.
1093 Some options which only apply to building cross compilers:
1095 @item --with-sysroot
1096 @itemx --with-sysroot=@var{dir}
1097 Tells GCC to consider @var{dir} as the root of a tree that contains a
1098 (subset of) the root filesystem of the target operating system.
1099 Target system headers, libraries and run-time object files will be
1100 searched in there. The specified directory is not copied into the
1101 install tree, unlike the options @option{--with-headers} and
1102 @option{--with-libs} that this option obsoletes. The default value,
1103 in case @option{--with-sysroot} is not given an argument, is
1104 @option{$@{gcc_tooldir@}/sys-root}. If the specified directory is a
1105 subdirectory of @option{$@{exec_prefix@}}, then it will be found relative to
1106 the GCC binaries if the installation tree is moved.
1108 @item --with-headers
1109 @itemx --with-headers=@var{dir}
1110 Deprecated in favor of @option{--with-sysroot}.
1111 Specifies that target headers are available when building a cross compiler.
1112 The @var{dir} argument specifies a directory which has the target include
1113 files. These include files will be copied into the @file{gcc} install
1114 directory. @emph{This option with the @var{dir} argument is required} when
1115 building a cross compiler, if @file{@var{prefix}/@var{target}/sys-include}
1116 doesn't pre-exist. If @file{@var{prefix}/@var{target}/sys-include} does
1117 pre-exist, the @var{dir} argument may be omitted. @command{fixincludes}
1118 will be run on these files to make them compatible with GCC.
1120 @itemx --with-libs=``@var{dir1} @var{dir2} @dots{} @var{dirN}''
1121 Deprecated in favor of @option{--with-sysroot}.
1122 Specifies a list of directories which contain the target runtime
1123 libraries. These libraries will be copied into the @file{gcc} install
1124 directory. If the directory list is omitted, this option has no
1127 Specifies that @samp{newlib} is
1128 being used as the target C library. This causes @code{__eprintf} to be
1129 omitted from @file{libgcc.a} on the assumption that it will be provided by
1133 Note that each @option{--enable} option has a corresponding
1134 @option{--disable} option and that each @option{--with} option has a
1135 corresponding @option{--without} option.
1142 @uref{./index.html,,Return to the GCC Installation page}
1146 @c ***Building****************************************************************
1148 @comment node-name, next, previous, up
1149 @node Building, Testing, Configuration, Installing GCC
1155 @cindex Installing GCC: Building
1157 Now that GCC is configured, you are ready to build the compiler and
1160 We @strong{highly} recommend that GCC be built using GNU make;
1161 other versions may work, then again they might not.
1162 GNU make is required for compiling GNAT (the Ada compiler) and the Java
1165 (For example, many broken versions of make will fail if you use the
1166 recommended setup where @var{objdir} is different from @var{srcdir}.
1167 Other broken versions may recompile parts of the compiler when
1168 installing the compiler.)
1170 Some commands executed when making the compiler may fail (return a
1171 nonzero status) and be ignored by @command{make}. These failures, which
1172 are often due to files that were not found, are expected, and can safely
1175 It is normal to have compiler warnings when compiling certain files.
1176 Unless you are a GCC developer, you can generally ignore these warnings
1177 unless they cause compilation to fail. Developers should attempt to fix
1178 any warnings encountered, however they can temporarily continue past
1179 warnings-as-errors by specifying the configure flag
1180 @option{--disable-werror}.
1182 On certain old systems, defining certain environment variables such as
1183 @env{CC} can interfere with the functioning of @command{make}.
1185 If you encounter seemingly strange errors when trying to build the
1186 compiler in a directory other than the source directory, it could be
1187 because you have previously configured the compiler in the source
1188 directory. Make sure you have done all the necessary preparations.
1190 If you build GCC on a BSD system using a directory stored in an old System
1191 V file system, problems may occur in running @command{fixincludes} if the
1192 System V file system doesn't support symbolic links. These problems
1193 result in a failure to fix the declaration of @code{size_t} in
1194 @file{sys/types.h}. If you find that @code{size_t} is a signed type and
1195 that type mismatches occur, this could be the cause.
1197 The solution is not to use such a directory for building GCC@.
1199 When building from CVS or snapshots, or if you modify parser sources,
1200 you need the Bison parser generator installed. Any version 1.25 or
1201 later should work; older versions may also work. If you do not modify
1202 parser sources, releases contain the Bison-generated files and you do
1203 not need Bison installed to build them.
1205 When building from CVS or snapshots, or if you modify Texinfo
1206 documentation, you need version 4.2 or later of Texinfo installed if you
1207 want Info documentation to be regenerated. Releases contain Info
1208 documentation pre-built for the unmodified documentation in the release.
1210 @section Building a native compiler
1212 For a native build issue the command @samp{make bootstrap}. This
1213 will build the entire GCC system, which includes the following steps:
1217 Build host tools necessary to build the compiler such as texinfo, bison,
1221 Build target tools for use by the compiler such as binutils (bfd,
1222 binutils, gas, gprof, ld, and opcodes)
1223 if they have been individually linked
1224 or moved into the top level GCC source tree before configuring.
1227 Perform a 3-stage bootstrap of the compiler.
1230 Perform a comparison test of the stage2 and stage3 compilers.
1233 Build runtime libraries using the stage3 compiler from the previous step.
1237 If you are short on disk space you might consider @samp{make
1238 bootstrap-lean} instead. This is identical to @samp{make
1239 bootstrap} except that object files from the stage1 and
1240 stage2 of the 3-stage bootstrap of the compiler are deleted as
1241 soon as they are no longer needed.
1243 If you want to save additional space during the bootstrap and in
1244 the final installation as well, you can build the compiler binaries
1245 without debugging information as in the following example. This will save
1246 roughly 40% of disk space both for the bootstrap and the final installation.
1247 (Libraries will still contain debugging information.)
1250 make CFLAGS='-O' LIBCFLAGS='-g -O2' \
1251 LIBCXXFLAGS='-g -O2 -fno-implicit-templates' bootstrap
1254 If you wish to use non-default GCC flags when compiling the stage2 and
1255 stage3 compilers, set @code{BOOT_CFLAGS} on the command line when doing
1256 @samp{make bootstrap}. Non-default optimization flags are less well
1257 tested here than the default of @samp{-g -O2}, but should still work.
1258 In a few cases, you may find that you need to specify special flags such
1259 as @option{-msoft-float} here to complete the bootstrap; or, if the
1260 native compiler miscompiles the stage1 compiler, you may need to work
1261 around this, by choosing @code{BOOT_CFLAGS} to avoid the parts of the
1262 stage1 compiler that were miscompiled, or by using @samp{make
1263 bootstrap4} to increase the number of stages of bootstrap.
1265 If you used the flag @option{--enable-languages=@dots{}} to restrict
1266 the compilers to be built, only those you've actually enabled will be
1267 built. This will of course only build those runtime libraries, for
1268 which the particular compiler has been built. Please note,
1269 that re-defining @env{LANGUAGES} when calling @samp{make bootstrap}
1270 @strong{does not} work anymore!
1272 If the comparison of stage2 and stage3 fails, this normally indicates
1273 that the stage2 compiler has compiled GCC incorrectly, and is therefore
1274 a potentially serious bug which you should investigate and report. (On
1275 a few systems, meaningful comparison of object files is impossible; they
1276 always appear ``different''. If you encounter this problem, you will
1277 need to disable comparison in the @file{Makefile}.)
1279 @section Building a cross compiler
1281 We recommend reading the
1282 @uref{http://www.objsw.com/CrossGCC/,,crossgcc FAQ}
1283 for information about building cross compilers.
1285 When building a cross compiler, it is not generally possible to do a
1286 3-stage bootstrap of the compiler. This makes for an interesting problem
1287 as parts of GCC can only be built with GCC@.
1289 To build a cross compiler, we first recommend building and installing a
1290 native compiler. You can then use the native GCC compiler to build the
1291 cross compiler. The installed native compiler needs to be GCC version
1294 Assuming you have already installed a native copy of GCC and configured
1295 your cross compiler, issue the command @command{make}, which performs the
1300 Build host tools necessary to build the compiler such as texinfo, bison,
1304 Build target tools for use by the compiler such as binutils (bfd,
1305 binutils, gas, gprof, ld, and opcodes)
1306 if they have been individually linked or moved into the top level GCC source
1307 tree before configuring.
1310 Build the compiler (single stage only).
1313 Build runtime libraries using the compiler from the previous step.
1316 Note that if an error occurs in any step the make process will exit.
1318 @section Building in parallel
1320 If you have a multiprocessor system you can use @samp{make bootstrap
1321 MAKE="make -j 2" -j 2} or just @samp{make -j 2 bootstrap}
1322 for GNU Make 3.79 and above instead of just @samp{make bootstrap}
1323 when building GCC@. You can use a bigger number instead of two if
1324 you like. In most cases, it won't help to use a number bigger than
1325 the number of processors in your machine.
1327 @section Building the Ada compiler
1329 In order to build GNAT, the Ada compiler, you need a working GNAT
1330 compiler (GNAT version 3.14 or later, or GCC version 3.1 or later),
1331 since the Ada front end is written in Ada (with some
1332 GNAT-specific extensions), and GNU make.
1334 However, you do not need a full installation of GNAT, just the GNAT
1335 binary @file{gnat1}, a copy of @file{gnatbind}, and a compiler driver
1336 which can deal with Ada input (by invoking the @file{gnat1} binary).
1337 You can specify this compiler driver by setting the @env{ADAC}
1338 environment variable at the configure step. @command{configure} can
1339 detect the driver automatically if it has got a common name such as
1340 @command{gcc} or @command{gnatgcc}. Of course, you still need a working
1341 C compiler (the compiler driver can be different or not).
1342 @command{configure} does not test whether the GNAT installation works
1343 and has a sufficiently recent version; if too old a GNAT version is
1344 installed, the build will fail unless @option{--enable-languages} is
1345 used to disable building the Ada front end.
1347 Additional build tools (such as @command{gnatmake}) or a working GNAT
1348 run-time library installation are usually @emph{not} required. However,
1349 if you want to bootstrap the compiler using a minimal version of GNAT,
1350 you have to issue the following commands before invoking @samp{make
1351 bootstrap} (this assumes that you start with an unmodified and consistent
1352 source distribution):
1355 cd @var{srcdir}/gcc/ada
1356 touch treeprs.ads [es]info.h nmake.ad[bs]
1359 At the moment, the GNAT library and several tools for GNAT are not built
1360 by @samp{make bootstrap}. You have to invoke
1361 @samp{make gnatlib_and_tools} in the @file{@var{objdir}/gcc}
1362 subdirectory before proceeding with the next steps.
1364 For example, you can build a native Ada compiler by issuing the
1365 following commands (assuming @command{make} is GNU make):
1369 @var{srcdir}/configure --enable-languages=c,ada
1370 cd @var{srcdir}/gcc/ada
1371 touch treeprs.ads [es]info.h nmake.ad[bs]
1375 make gnatlib_and_tools
1379 Currently, when compiling the Ada front end, you cannot use the parallel
1380 build feature described in the previous section.
1382 @section Building with profile feedback
1384 It is possible to use profile feedback to optimize the compiler itself. This
1385 should result in a faster compiler binary. Experiments done on x86 using gcc
1386 3.3 showed approximately 7 percent speedup on compiling C programs. To
1387 bootstrap compiler with profile feedback, use @code{make profiledbootstrap}.
1389 When @samp{make profiledbootstrap} is run, it will first build a @code{stage1}
1390 compiler. This compiler is used to build a @code{stageprofile} compiler
1391 instrumented to collect execution counts of instruction and branch
1392 probabilities. Then runtime libraries are compiled with profile collected.
1393 Finally a @code{stagefeedback} compiler is built using the information collected.
1395 Unlike @samp{make bootstrap} several additional restrictions apply. The
1396 compiler used to build @code{stage1} needs to support a 64-bit integral type.
1397 It is recommended to only use GCC for this. Also parallel make is currently
1398 not supported since collisions in profile collecting may occur.
1405 @uref{./index.html,,Return to the GCC Installation page}
1409 @c ***Testing*****************************************************************
1411 @comment node-name, next, previous, up
1412 @node Testing, Final install, Building, Installing GCC
1416 @chapter Installing GCC: Testing
1419 @cindex Installing GCC: Testing
1422 Before you install GCC, we encourage you to run the testsuites and to
1423 compare your results with results from a similar configuration that have
1424 been submitted to the
1425 @uref{http://gcc.gnu.org/ml/gcc-testresults/,,gcc-testresults mailing list}.
1426 Some of these archived results are linked from the build status lists
1427 at @uref{http://gcc.gnu.org/buildstat.html}, although not everyone who
1428 reports a successful build runs the testsuites and submits the results.
1429 This step is optional and may require you to download additional software,
1430 but it can give you confidence in your new GCC installation or point out
1431 problems before you install and start using your new GCC.
1433 First, you must have @uref{download.html,,downloaded the testsuites}.
1434 These are part of the full distribution, but if you downloaded the
1435 ``core'' compiler plus any front ends, you must download the testsuites
1438 Second, you must have the testing tools installed. This includes
1439 @uref{http://www.gnu.org/software/dejagnu/,,DejaGnu} 1.4.2 (or later),
1440 Tcl, and Expect; the DejaGnu site has links to these.
1442 If the directories where @command{runtest} and @command{expect} were
1443 installed are not in the @env{PATH}, you may need to set the following
1444 environment variables appropriately, as in the following example (which
1445 assumes that DejaGnu has been installed under @file{/usr/local}):
1448 TCL_LIBRARY = /usr/local/share/tcl8.0
1449 DEJAGNULIBS = /usr/local/share/dejagnu
1452 (On systems such as Cygwin, these paths are required to be actual
1453 paths, not mounts or links; presumably this is due to some lack of
1454 portability in the DejaGnu code.)
1457 Finally, you can run the testsuite (which may take a long time):
1459 cd @var{objdir}; make -k check
1462 This will test various components of GCC, such as compiler
1463 front ends and runtime libraries. While running the testsuite, DejaGnu
1464 might emit some harmless messages resembling
1465 @samp{WARNING: Couldn't find the global config file.} or
1466 @samp{WARNING: Couldn't find tool init file} that can be ignored.
1468 @section How can I run the test suite on selected tests?
1470 In order to run sets of tests selectively, there are targets
1471 @samp{make check-gcc} and @samp{make check-g++}
1472 in the @file{gcc} subdirectory of the object directory. You can also
1473 just run @samp{make check} in a subdirectory of the object directory.
1476 A more selective way to just run all @command{gcc} execute tests in the
1480 make check-gcc RUNTESTFLAGS="execute.exp @var{other-options}"
1483 Likewise, in order to run only the @command{g++} ``old-deja'' tests in
1484 the testsuite with filenames matching @samp{9805*}, you would use
1487 make check-g++ RUNTESTFLAGS="old-deja.exp=9805* @var{other-options}"
1490 The @file{*.exp} files are located in the testsuite directories of the GCC
1491 source, the most important ones being @file{compile.exp},
1492 @file{execute.exp}, @file{dg.exp} and @file{old-deja.exp}.
1493 To get a list of the possible @file{*.exp} files, pipe the
1494 output of @samp{make check} into a file and look at the
1495 @samp{Running @dots{} .exp} lines.
1498 @section Additional testing for Java Class Libraries
1500 The @uref{http://sources.redhat.com/mauve/,,Mauve Project} provides
1501 a suite of tests for the Java Class Libraries. This suite can be run
1502 as part of libgcj testing by placing the Mauve tree within the libjava
1503 testsuite at @file{libjava/testsuite/libjava.mauve/mauve}, or by
1504 specifying the location of that tree when invoking @samp{make}, as in
1505 @samp{make MAUVEDIR=~/mauve check}.
1507 @uref{http://www-124.ibm.com/developerworks/oss/cvs/jikes/~checkout~/jacks/jacks.html,,Jacks}
1508 is a free test suite that tests Java compiler front ends. This suite
1509 can be run as part of libgcj testing by placing the Jacks tree within
1510 the libjava testsuite at @file{libjava/testsuite/libjava.jacks/jacks}.
1512 @section How to interpret test results
1514 The result of running the testsuite are various @file{*.sum} and @file{*.log}
1515 files in the testsuite subdirectories. The @file{*.log} files contain a
1516 detailed log of the compiler invocations and the corresponding
1517 results, the @file{*.sum} files summarize the results. These summaries
1518 contain status codes for all tests:
1522 PASS: the test passed as expected
1524 XPASS: the test unexpectedly passed
1526 FAIL: the test unexpectedly failed
1528 XFAIL: the test failed as expected
1530 UNSUPPORTED: the test is not supported on this platform
1532 ERROR: the testsuite detected an error
1534 WARNING: the testsuite detected a possible problem
1537 It is normal for some tests to report unexpected failures. At the
1538 current time our testing harness does not allow fine grained control
1539 over whether or not a test is expected to fail. We expect to fix this
1540 problem in future releases.
1543 @section Submitting test results
1545 If you want to report the results to the GCC project, use the
1546 @file{contrib/test_summary} shell script. Start it in the @var{objdir} with
1549 @var{srcdir}/contrib/test_summary -p your_commentary.txt \
1550 -m gcc-testresults@@gcc.gnu.org |sh
1553 This script uses the @command{Mail} program to send the results, so
1554 make sure it is in your @env{PATH}. The file @file{your_commentary.txt} is
1555 prepended to the testsuite summary and should contain any special
1556 remarks you have on your results or your build environment. Please
1557 do not edit the testsuite result block or the subject line, as these
1558 messages may be automatically processed.
1565 @uref{./index.html,,Return to the GCC Installation page}
1569 @c ***Final install***********************************************************
1571 @comment node-name, next, previous, up
1572 @node Final install, , Testing, Installing GCC
1574 @ifset finalinstallhtml
1576 @chapter Installing GCC: Final installation
1579 Now that GCC has been built (and optionally tested), you can install it with
1581 cd @var{objdir}; make install
1584 We strongly recommend to install into a target directory where there is
1585 no previous version of GCC present.
1587 That step completes the installation of GCC; user level binaries can
1588 be found in @file{@var{prefix}/bin} where @var{prefix} is the value you
1589 specified with the @option{--prefix} to configure (or @file{/usr/local}
1590 by default). (If you specified @option{--bindir}, that directory will
1591 be used instead; otherwise, if you specified @option{--exec-prefix},
1592 @file{@var{exec-prefix}/bin} will be used.) Headers for the C++ and
1593 Java libraries are installed in @file{@var{prefix}/include}; libraries
1594 in @file{@var{libdir}} (normally @file{@var{prefix}/lib}); internal
1595 parts of the compiler in @file{@var{libdir}/gcc-lib}; documentation in
1596 info format in @file{@var{infodir}} (normally @file{@var{prefix}/info}).
1598 When installing cross-compilers, GCC's executables
1599 are not only installed into @file{@var{bindir}}, that
1600 is, @file{@var{exec-prefix}/bin}, but additionally into
1601 @file{@var{exec-prefix}/@var{target-alias}/bin}, if that directory
1602 exists. Typically, such @dfn{tooldirs} hold target-specific
1603 binutils, including assembler and linker.
1605 Installation into a temporary staging area or into a @command{chroot}
1606 jail can be achieved with the command
1609 make DESTDIR=@var{path-to-rootdir} install
1612 @noindent where @var{path-to-rootdir} is the absolute path of
1613 a directory relative to which all installation paths will be
1614 interpreted. Note that the directory specified by @code{DESTDIR}
1615 need not exist yet; it will be created if necessary.
1617 There is a subtle point with tooldirs and @code{DESTDIR}:
1618 If you relocate a cross-compiler installation with
1619 e.g.@: @samp{DESTDIR=@var{rootdir}}, then the directory
1620 @file{@var{rootdir}/@var{exec-prefix}/@var{target-alias}/bin} will
1621 be filled with duplicated GCC executables only if it already exists,
1622 it will not be created otherwise. This is regarded as a feature,
1623 not as a bug, because it gives slightly more control to the packagers
1624 using the @code{DESTDIR} feature.
1626 If you built a released version of GCC using @samp{make bootstrap} then please
1627 quickly review the build status page for your release, available from
1628 @uref{http://gcc.gnu.org/buildstat.html}.
1629 If your system is not listed for the version of GCC that you built,
1631 @email{gcc@@gcc.gnu.org} indicating
1632 that you successfully built and installed GCC.
1633 Include the following information:
1637 Output from running @file{@var{srcdir}/config.guess}. Do not send us
1638 that file itself, just the one-line output from running it.
1641 The output of @samp{gcc -v} for your newly installed gcc.
1642 This tells us which version of GCC you built and the options you passed to
1646 Whether you enabled all languages or a subset of them. If you used a
1647 full distribution then this information is part of the configure
1648 options in the output of @samp{gcc -v}, but if you downloaded the
1649 ``core'' compiler plus additional front ends then it isn't apparent
1650 which ones you built unless you tell us about it.
1653 If the build was for GNU/Linux, also include:
1656 The distribution name and version (e.g., Red Hat 7.1 or Debian 2.2.3);
1657 this information should be available from @file{/etc/issue}.
1660 The version of the Linux kernel, available from @samp{uname --version}
1664 The version of glibc you used; for RPM-based systems like Red Hat,
1665 Mandrake, and SuSE type @samp{rpm -q glibc} to get the glibc version,
1666 and on systems like Debian and Progeny use @samp{dpkg -l libc6}.
1668 For other systems, you can include similar information if you think it is
1672 Any other information that you think would be useful to people building
1673 GCC on the same configuration. The new entry in the build status list
1674 will include a link to the archived copy of your message.
1677 We'd also like to know if the
1679 @ref{Specific, host/target specific installation notes}
1682 @uref{specific.html,,host/target specific installation notes}
1684 didn't include your host/target information or if that information is
1685 incomplete or out of date. Send a note to
1686 @email{gcc@@gcc.gnu.org} telling us how the information should be changed.
1688 If you find a bug, please report it following our
1689 @uref{../bugs.html,,bug reporting guidelines}.
1691 If you want to print the GCC manuals, do @samp{cd @var{objdir}; make
1692 dvi}. You will need to have @command{texi2dvi} (version at least 4.2)
1693 and @TeX{} installed. This creates a number of @file{.dvi} files in
1694 subdirectories of @file{@var{objdir}}; these may be converted for
1695 printing with programs such as @command{dvips}. You can also
1696 @uref{http://www.gnu.org/order/order.html,,buy printed manuals from the
1697 Free Software Foundation}, though such manuals may not be for the most
1698 recent version of GCC@.
1705 @uref{./index.html,,Return to the GCC Installation page}
1709 @c ***Binaries****************************************************************
1711 @comment node-name, next, previous, up
1712 @node Binaries, Specific, Installing GCC, Top
1716 @chapter Installing GCC: Binaries
1719 @cindex Installing GCC: Binaries
1721 We are often asked about pre-compiled versions of GCC@. While we cannot
1722 provide these for all platforms, below you'll find links to binaries for
1723 various platforms where creating them by yourself is not easy due to various
1726 Please note that we did not create these binaries, nor do we
1727 support them. If you have any problems installing them, please
1728 contact their makers.
1735 @uref{http://www.bullfreeware.com,,Bull's Freeware and Shareware Archive for AIX};
1738 @uref{http://aixpdslib.seas.ucla.edu,,UCLA Software Library for AIX}.
1742 DOS---@uref{http://www.delorie.com/djgpp/,,DJGPP}.
1745 Hitachi H8/300[HS]---@uref{http://h8300-hms.sourceforge.net/,,GNU
1746 Development Tools for the Hitachi H8/300[HS] Series}.
1752 @uref{http://hpux.cae.wisc.edu/,,HP-UX Porting Center};
1755 @uref{ftp://sunsite.informatik.rwth-aachen.de/pub/packages/gcc_hpux/,,Binaries for HP-UX 11.00 at Aachen University of Technology}.
1759 Motorola 68HC11/68HC12---@uref{http://www.gnu-m68hc11.org,,GNU
1760 Development Tools for the Motorola 68HC11/68HC12}.
1763 @uref{http://www.sco.com/skunkware/devtools/index.html#gcc,,SCO
1764 OpenServer/Unixware}.
1767 Sinix/Reliant Unix---@uref{ftp://ftp.fujitsu-siemens.com/pub/pd/gnu/gcc/,,Siemens}.
1770 Solaris 2 (SPARC, Intel)---@uref{http://www.sunfreeware.com/,,Sunfreeware}.
1773 SGI---@uref{http://freeware.sgi.com/,,SGI Freeware}.
1779 The @uref{http://sources.redhat.com/cygwin/,,Cygwin} project;
1781 The @uref{http://www.mingw.org/,,MinGW} project.
1785 @uref{ftp://ftp.thewrittenword.com/packages/by-name/,,The
1786 Written Word} offers binaries for
1789 Digital UNIX 4.0D and 5.1,
1791 HP-UX 10.20, 11.00, and 11.11, and
1792 Solaris/SPARC 2.5.1, 2.6, 2.7, 8, and 9,
1795 In addition to those specific offerings, you can get a binary
1796 distribution CD-ROM from the
1797 @uref{http://www.fsf.org/order/order.html,,Free Software Foundation}.
1798 It contains binaries for a number of platforms, and
1799 includes not only GCC, but other stuff as well. The current CD does
1800 not contain the latest version of GCC, but it should allow
1801 bootstrapping the compiler. An updated version of that disk is in the
1809 @uref{./index.html,,Return to the GCC Installation page}
1813 @c ***Specific****************************************************************
1815 @comment node-name, next, previous, up
1816 @node Specific, Old, Binaries, Top
1820 @chapter Host/target specific installation notes for GCC
1823 @cindex Specific installation notes
1824 @cindex Target specific installation
1825 @cindex Host specific installation
1826 @cindex Target specific installation notes
1828 Please read this document carefully @emph{before} installing the
1829 GNU Compiler Collection on your machine.
1834 @uref{#alpha*-*-*,,alpha*-*-*}
1836 @uref{#alpha*-dec-osf*,,alpha*-dec-osf*}
1838 @uref{#alphaev5-cray-unicosmk*,,alphaev5-cray-unicosmk*}
1840 @uref{#arc-*-elf,,arc-*-elf}
1842 @uref{#arm-*-*,,arm-*-*}
1844 @uref{#xscale-*-*,,xscale-*-*}
1852 @uref{#dsp16xx,,dsp16xx}
1854 @uref{#*-*-freebsd*,,*-*-freebsd*}
1856 @uref{#h8300-hms,,h8300-hms}
1858 @uref{#hppa*-hp-hpux*,,hppa*-hp-hpux*}
1860 @uref{#hppa*-hp-hpux10,,hppa*-hp-hpux10}
1862 @uref{#hppa*-hp-hpux11,,hppa*-hp-hpux11}
1864 @uref{#i370-*-*,,i370-*-*}
1866 @uref{#*-*-linux-gnu,,*-*-linux-gnu}
1868 @uref{#ix86-*-linux*aout,,i?86-*-linux*aout}
1870 @uref{#ix86-*-linux*,,i?86-*-linux*}
1872 @uref{#ix86-*-sco,,i?86-*-sco}
1874 @uref{#ix86-*-sco3.2v4,,i?86-*-sco3.2v4}
1876 @uref{#ix86-*-sco3.2v5*,,i?86-*-sco3.2v5*}
1878 @uref{#ix86-*-udk,,i?86-*-udk}
1880 @uref{#ix86-*-esix,,i?86-*-esix}
1882 @uref{#ia64-*-linux,,ia64-*-linux}
1884 @uref{#*-ibm-aix*,,*-ibm-aix*}
1886 @uref{#ip2k-*-elf,,ip2k-*-elf}
1888 @uref{#m32r-*-elf,,m32r-*-elf}
1890 @uref{#m6811-elf,,m6811-elf}
1892 @uref{#m6812-elf,,m6812-elf}
1894 @uref{#m68k-hp-hpux,,m68k-hp-hpux}
1896 @uref{#mips-*-*,,mips-*-*}
1898 @uref{#mips-sgi-irix5,,mips-sgi-irix5}
1900 @uref{#mips-sgi-irix6,,mips-sgi-irix6}
1902 @uref{#powerpc*-*-*,,powerpc*-*-*, powerpc-*-sysv4}
1904 @uref{#powerpc-*-darwin*,,powerpc-*-darwin*}
1906 @uref{#powerpc-*-elf,,powerpc-*-elf, powerpc-*-sysv4}
1908 @uref{#powerpc-*-linux-gnu*,,powerpc-*-linux-gnu*}
1910 @uref{#powerpc-*-netbsd*,,powerpc-*-netbsd*}
1912 @uref{#powerpc-*-eabiaix,,powerpc-*-eabiaix}
1914 @uref{#powerpc-*-eabisim,,powerpc-*-eabisim}
1916 @uref{#powerpc-*-eabi,,powerpc-*-eabi}
1918 @uref{#powerpcle-*-elf,,powerpcle-*-elf, powerpcle-*-sysv4}
1920 @uref{#powerpcle-*-eabisim,,powerpcle-*-eabisim}
1922 @uref{#powerpcle-*-eabi,,powerpcle-*-eabi}
1924 @uref{#powerpcle-*-winnt,,powerpcle-*-winnt, powerpcle-*-pe}
1926 @uref{#s390-*-linux*,,s390-*-linux*}
1928 @uref{#s390x-*-linux*,,s390x-*-linux*}
1930 @uref{#*-*-solaris2*,,*-*-solaris2*}
1932 @uref{#sparc-sun-solaris2*,,sparc-sun-solaris2*}
1934 @uref{#sparc-sun-solaris2.7,,sparc-sun-solaris2.7}
1936 @uref{#sparc-*-linux*,,sparc-*-linux*}
1938 @uref{#sparc64-*-solaris2*,,sparc64-*-solaris2*}
1940 @uref{#sparcv9-*-solaris2*,,sparcv9-*-solaris2*}
1942 @uref{#*-*-sysv*,,*-*-sysv*}
1944 @uref{#vax-dec-ultrix,,vax-dec-ultrix}
1946 @uref{#*-*-vxworks*,,*-*-vxworks*}
1948 @uref{#xtensa-*-elf,,xtensa-*-elf}
1950 @uref{#xtensa-*-linux*,,xtensa-*-linux*}
1952 @uref{#windows,,Microsoft Windows}
1956 @uref{#older,,Older systems}
1961 @uref{#elf_targets,,all ELF targets} (SVR4, Solaris 2, etc.)
1967 <!-- -------- host/target specific issues start here ---------------- -->
1970 @heading @anchor{alpha*-*-*}alpha*-*-*
1972 This section contains general configuration information for all
1973 alpha-based platforms using ELF (in particular, ignore this section for
1974 DEC OSF/1, Digital UNIX and Tru64 UNIX)@. In addition to reading this
1975 section, please read all other sections that match your target.
1977 We require binutils 2.11.2 or newer.
1978 Previous binutils releases had a number of problems with DWARF 2
1979 debugging information, not the least of which is incorrect linking of
1985 @heading @anchor{alpha*-dec-osf*}alpha*-dec-osf*
1986 Systems using processors that implement the DEC Alpha architecture and
1987 are running the DEC/Compaq Unix (DEC OSF/1, Digital UNIX, or Compaq
1988 Tru64 UNIX) operating system, for example the DEC Alpha AXP systems.
1990 As of GCC 3.2, versions before @code{alpha*-dec-osf4} are no longer
1991 supported. (These are the versions which identify themselves as DEC
1994 In Digital Unix V4.0, virtual memory exhausted bootstrap failures
1995 may be fixed by configuring with @option{--with-gc=simple},
1996 reconfiguring Kernel Virtual Memory and Swap parameters
1997 per the @command{/usr/sbin/sys_check} Tuning Suggestions,
1998 or applying the patch in
1999 @uref{http://gcc.gnu.org/ml/gcc/2002-08/msg00822.html}.
2001 In Tru64 UNIX V5.1, Compaq introduced a new assembler that does not
2002 currently (2001-06-13) work with @command{mips-tfile}. As a workaround,
2003 we need to use the old assembler, invoked via the barely documented
2004 @option{-oldas} option. To bootstrap GCC, you either need to use the
2008 % CC=cc @var{srcdir}/configure [@var{options}] [@var{target}]
2011 or you can use a copy of GCC 2.95.3 or higher built on Tru64 UNIX V4.0:
2014 % CC=gcc -Wa,-oldas @var{srcdir}/configure [@var{options}] [@var{target}]
2017 As of GNU binutils 2.11.2, neither GNU @command{as} nor GNU @command{ld}
2018 are supported on Tru64 UNIX, so you must not configure GCC with
2019 @option{--with-gnu-as} or @option{--with-gnu-ld}.
2021 The @option{--enable-threads} options isn't supported yet. A patch is
2022 in preparation for a future release.
2024 GCC writes a @samp{.verstamp} directive to the assembler output file
2025 unless it is built as a cross-compiler. It gets the version to use from
2026 the system header file @file{/usr/include/stamp.h}. If you install a
2027 new version of DEC Unix, you should rebuild GCC to pick up the new version
2030 Note that since the Alpha is a 64-bit architecture, cross-compilers from
2031 32-bit machines will not generate code as efficient as that generated
2032 when the compiler is running on a 64-bit machine because many
2033 optimizations that depend on being able to represent a word on the
2034 target in an integral value on the host cannot be performed. Building
2035 cross-compilers on the Alpha for 32-bit machines has only been tested in
2036 a few cases and may not work properly.
2038 @samp{make compare} may fail on old versions of DEC Unix unless you add
2039 @option{-save-temps} to @code{CFLAGS}. On these systems, the name of the
2040 assembler input file is stored in the object file, and that makes
2041 comparison fail if it differs between the @code{stage1} and
2042 @code{stage2} compilations. The option @option{-save-temps} forces a
2043 fixed name to be used for the assembler input file, instead of a
2044 randomly chosen name in @file{/tmp}. Do not add @option{-save-temps}
2045 unless the comparisons fail without that option. If you add
2046 @option{-save-temps}, you will have to manually delete the @samp{.i} and
2047 @samp{.s} files after each series of compilations.
2049 GCC now supports both the native (ECOFF) debugging format used by DBX
2050 and GDB and an encapsulated STABS format for use only with GDB@. See the
2051 discussion of the @option{--with-stabs} option of @file{configure} above
2052 for more information on these formats and how to select them.
2054 There is a bug in DEC's assembler that produces incorrect line numbers
2055 for ECOFF format when the @samp{.align} directive is used. To work
2056 around this problem, GCC will not emit such alignment directives
2057 while writing ECOFF format debugging information even if optimization is
2058 being performed. Unfortunately, this has the very undesirable
2059 side-effect that code addresses when @option{-O} is specified are
2060 different depending on whether or not @option{-g} is also specified.
2062 To avoid this behavior, specify @option{-gstabs+} and use GDB instead of
2063 DBX@. DEC is now aware of this problem with the assembler and hopes to
2064 provide a fix shortly.
2069 @heading @anchor{alphaev5-cray-unicosmk*}alphaev5-cray-unicosmk*
2070 Cray T3E systems running Unicos/Mk.
2072 This port is incomplete and has many known bugs. We hope to improve the
2073 support for this target soon. Currently, only the C front end is supported,
2074 and it is not possible to build parallel applications. Cray modules are not
2075 supported; in particular, Craylibs are assumed to be in
2076 @file{/opt/ctl/craylibs/craylibs}.
2078 You absolutely @strong{must} use GNU make on this platform. Also, you
2079 need to tell GCC where to find the assembler and the linker. The
2080 simplest way to do so is by providing @option{--with-as} and
2081 @option{--with-ld} to @file{configure}, e.g.@:
2084 configure --with-as=/opt/ctl/bin/cam --with-ld=/opt/ctl/bin/cld \
2085 --enable-languages=c
2088 The comparison test during @samp{make bootstrap} fails on Unicos/Mk
2089 because the assembler inserts timestamps into object files. You should
2090 be able to work around this by doing @samp{make all} after getting this
2096 @heading @anchor{arc-*-elf}arc-*-elf
2097 Argonaut ARC processor.
2098 This configuration is intended for embedded systems.
2103 @heading @anchor{arm-*-*}arm-*-*
2104 @heading @anchor{xscale-*-*}xscale-*-*
2105 Advanced RISC Machines ARM-family processors. Subtargets that use the
2106 ELF object format require GNU binutils 2.13 or newer.
2111 @heading @anchor{avr}avr
2113 ATMEL AVR-family micro controllers. These are used in embedded
2114 applications. There are no standard Unix configurations.
2116 @xref{AVR Options,, AVR Options, gcc, Using and Porting the GNU Compiler
2120 See ``AVR Options'' in the main manual
2122 for the list of supported MCU types.
2124 Use @samp{configure --target=avr --enable-languages="c"} to configure GCC@.
2126 Further installation notes and other useful information about AVR tools
2127 can also be obtained from:
2131 @uref{http://www.openavr.org,,http://www.openavr.org}
2133 @uref{http://home.overta.ru/users/denisc/,,http://home.overta.ru/users/denisc/}
2135 @uref{http://www.amelek.gda.pl/avr/,,http://www.amelek.gda.pl/avr/}
2138 We @emph{strongly} recommend using binutils 2.13 or newer.
2140 The following error:
2142 Error: register required
2145 indicates that you should upgrade to a newer version of the binutils.
2150 @heading @anchor{c4x}c4x
2152 Texas Instruments TMS320C3x and TMS320C4x Floating Point Digital Signal
2153 Processors. These are used in embedded applications. There are no
2154 standard Unix configurations.
2156 @xref{TMS320C3x/C4x Options,, TMS320C3x/C4x Options, gcc, Using and
2157 Porting the GNU Compiler Collection (GCC)},
2160 See ``TMS320C3x/C4x Options'' in the main manual
2162 for the list of supported MCU types.
2164 GCC can be configured as a cross compiler for both the C3x and C4x
2165 architectures on the same system. Use @samp{configure --target=c4x
2166 --enable-languages="c,c++"} to configure.
2169 Further installation notes and other useful information about C4x tools
2170 can also be obtained from:
2174 @uref{http://www.elec.canterbury.ac.nz/c4x/,,http://www.elec.canterbury.ac.nz/c4x/}
2180 @heading @anchor{cris}CRIS
2182 CRIS is the CPU architecture in Axis Communications ETRAX system-on-a-chip
2183 series. These are used in embedded applications.
2186 @xref{CRIS Options,, CRIS Options, gcc, Using and Porting the GNU Compiler
2190 See ``CRIS Options'' in the main manual
2192 for a list of CRIS-specific options.
2194 There are a few different CRIS targets:
2196 @item cris-axis-aout
2197 Old target. Includes a multilib for the @samp{elinux} a.out-based
2198 target. No multilibs for newer architecture variants.
2200 Mainly for monolithic embedded systems. Includes a multilib for the
2201 @samp{v10} core used in @samp{ETRAX 100 LX}.
2202 @item cris-axis-linux-gnu
2203 A GNU/Linux port for the CRIS architecture, currently targeting
2204 @samp{ETRAX 100 LX} by default.
2207 For @code{cris-axis-aout} and @code{cris-axis-elf} you need binutils 2.11
2208 or newer. For @code{cris-axis-linux-gnu} you need binutils 2.12 or newer.
2210 Pre-packaged tools can be obtained from
2211 @uref{ftp://ftp.axis.com/pub/axis/tools/cris/compiler-kit/}. More
2212 information about this platform is available at
2213 @uref{http://developer.axis.com/}.
2218 @heading @anchor{dos}DOS
2220 Please have a look at our @uref{binaries.html,,binaries page}.
2222 You cannot install GCC by itself on MSDOS; it will not compile under
2223 any MSDOS compiler except itself. You need to get the complete
2224 compilation package DJGPP, which includes binaries as well as sources,
2225 and includes all the necessary compilation tools and libraries.
2230 @heading @anchor{dsp16xx}dsp16xx
2231 A port to the AT&T DSP1610 family of processors.
2236 @heading @anchor{*-*-freebsd*}*-*-freebsd*
2238 The version of binutils installed in @file{/usr/bin} is known to work unless
2239 otherwise specified in any per-architecture notes. However, binutils
2240 2.12.1 or greater is known to improve overall testsuite results.
2242 FreeBSD 1 is no longer supported.
2244 For FreeBSD 2 or any mutant a.out versions of FreeBSD 3: All
2245 configuration support and files as shipped with GCC 2.95 are still in
2246 place. FreeBSD 2.2.7 has been known to bootstrap completely; however,
2247 it is unknown which version of binutils was used (it is assumed that it
2248 was the system copy in @file{/usr/bin}) and C++ EH failures were noted.
2250 For FreeBSD using the ELF file format: DWARF 2 debugging is now the
2251 default for all CPU architectures. It had been the default on
2252 FreeBSD/alpha since its inception. You may use @option{-gstabs} instead
2253 of @option{-g}, if you really want the old debugging format. There are
2254 no known issues with mixing object files and libraries with different
2255 debugging formats. Otherwise, this release of GCC should now match more
2256 of the configuration used in the stock FreeBSD configuration of GCC. In
2257 particular, @option{--enable-threads} is now configured by default.
2258 However, as a general user, do not attempt to replace the system
2259 compiler with this release. Known to bootstrap and check with good
2260 results on FreeBSD 4.8-STABLE and 5-CURRENT@. In the past, known to
2261 bootstrap and check with good results on FreeBSD 3.0, 3.4, 4.0, 4.2,
2262 4.3, 4.4, 4.5-STABLE@.
2264 In principle, @option{--enable-threads} is now compatible with
2265 @option{--enable-libgcj} on FreeBSD@. However, it has only been built
2266 and tested on @samp{i386-*-freebsd[45]} and @samp{alpha-*-freebsd[45]}.
2268 library may be incorrectly built (symbols are missing at link time).
2269 There is a rare timing-based startup hang (probably involves an
2270 assumption about the thread library). Multi-threaded boehm-gc (required for
2271 libjava) exposes severe threaded signal-handling bugs on FreeBSD before
2272 4.5-RELEASE@. Other CPU architectures
2273 supported by FreeBSD will require additional configuration tuning in, at
2274 the very least, both boehm-gc and libffi.
2276 Shared @file{libgcc_s.so} is now built and installed by default.
2281 @heading @anchor{h8300-hms}h8300-hms
2282 Hitachi H8/300 series of processors.
2284 Please have a look at our @uref{binaries.html,,binaries page}.
2286 The calling convention and structure layout has changed in release 2.6.
2287 All code must be recompiled. The calling convention now passes the
2288 first three arguments in function calls in registers. Structures are no
2289 longer a multiple of 2 bytes.
2294 @heading @anchor{hppa*-hp-hpux*}hppa*-hp-hpux*
2295 HP-UX version 9 or older is no longer supported.
2297 We @emph{highly} recommend using gas/binutils 2.8 or newer on all hppa
2298 platforms; you may encounter a variety of problems when using the HP
2301 Specifically, @option{-g} does not work on HP-UX (since that system
2302 uses a peculiar debugging format which GCC does not know about), unless you
2303 use GAS and GDB and configure GCC with the
2304 @uref{./configure.html#with-gnu-as,,@option{--with-gnu-as}} and
2305 @option{--with-as=@dots{}} options.
2307 If you wish to use the pa-risc 2.0 architecture support with a 32-bit
2308 runtime, you must use either the HP assembler, gas/binutils 2.11 or newer,
2310 @uref{ftp://sources.redhat.com/pub/binutils/snapshots,,snapshot of gas}.
2312 There are two default scheduling models for instructions. These are
2313 PROCESSOR_7100LC and PROCESSOR_8000. They are selected from the pa-risc
2314 architecture specified for the target machine when configuring.
2315 PROCESSOR_8000 is the default. PROCESSOR_7100LC is selected when
2316 the target is a @samp{hppa1*} machine.
2318 The PROCESSOR_8000 model is not well suited to older processors. Thus,
2319 it is important to completely specify the machine architecture when
2320 configuring if you want a model other than PROCESSOR_8000. The macro
2321 TARGET_SCHED_DEFAULT can be defined in BOOT_CFLAGS if a different
2322 default scheduling model is desired.
2324 More specific information to @samp{hppa*-hp-hpux*} targets follows.
2329 @heading @anchor{hppa*-hp-hpux10}hppa*-hp-hpux10
2331 For hpux10.20, we @emph{highly} recommend you pick up the latest sed patch
2332 @code{PHCO_19798} from HP@. HP has two sites which provide patches free of
2338 <a href="http://us.itrc.hp.com/service/home/home.do">US, Canada, Asia-Pacific, and
2342 @uref{http://us.itrc.hp.com/service/home/home.do,,} US, Canada, Asia-Pacific,
2346 @uref{http://europe.itrc.hp.com/service/home/home.do,,} Europe.
2349 The HP assembler on these systems has some problems. Most notably the
2350 assembler inserts timestamps into each object file it creates, causing
2351 the 3-stage comparison test to fail during a @samp{make bootstrap}.
2352 You should be able to continue by saying @samp{make all} after getting
2353 the failure from @samp{make bootstrap}.
2359 @heading @anchor{hppa*-hp-hpux11}hppa*-hp-hpux11
2361 GCC 3.0 and up support HP-UX 11. On 64-bit capable systems, there
2362 are two distinct ports. The @samp{hppa2.0w-hp-hpux11*} port generates
2363 code for the 32-bit pa-risc runtime architecture. It uses the HP
2364 linker. The @samp{hppa64-hp-hpux11*} port generates 64-bit code for the
2365 pa-risc 2.0 architecture. The script config.guess now selects the port
2366 type based on the type compiler detected during configuration. You must
2367 set your @env{PATH} or define @env{CC} so that configure finds an appropriate
2368 compiler for the initial bootstrap. Different prefixes must be used if
2369 both ports are to be installed on the same system.
2371 It is best to explicitly configure the @samp{hppa64-hp-hpux11*} target
2372 with the @option{--with-ld=@dots{}} option. We support both the HP
2373 and GNU linkers for this target. The two linkers require different
2374 link commands. Thus, it's not possible to switch linkers during a
2375 GCC build. This has been been reported to occur in a unified build
2376 of binutils and GCC.
2378 GCC 2.95.x is not supported under HP-UX 11 and cannot be used to
2379 compile GCC 3.0 and up. Refer to @uref{binaries.html,,binaries} for
2380 information about obtaining precompiled GCC binaries for HP-UX.
2382 You must use GNU binutils 2.11 or above with the 32-bit port. Thread
2383 support is not currently implemented, so @option{--enable-threads} does
2387 @item @uref{http://gcc.gnu.org/ml/gcc-prs/2002-01/msg00551.html}
2388 @item @uref{http://gcc.gnu.org/ml/gcc-bugs/2002-01/msg00663.html}
2391 GCC 3.3 and later support weak symbols on the 32-bit port using SOM
2392 secondary definition symbols. This feature is not enabled for earlier
2393 versions of HP-UX since there have been bugs in the linker support for
2394 secondary symbols. The HP linker patches @code{PHSS_26559} and
2395 @code{PHSS_24304} for HP-UX 11.00 and 11.11, respectively, correct the
2396 problem of linker core dumps creating C++ libraries. Earlier patches
2397 may work but they have not been tested.
2399 GCC 3.3 nows uses the ELF DT_INIT_ARRAY and DT_FINI_ARRAY capability
2400 to run initializers and finalizers on the 64-bit port. The feature
2401 requires CVS binutils as of January 2, 2003, or a subsequent release
2402 to correct a problem arising from HP's non-standard use of the .init
2403 and .fini sections. The 32-bit port uses the linker @option{+init}
2404 and @option{+fini} options. As with the support for secondary symbols,
2405 there have been bugs in the order in which these options are executed
2406 by the HP linker. So, again a recent linker patch is recommended.
2408 The HP assembler has many limitations and is not recommended for either
2409 the 32 or 64-bit ports. For example, it does not support weak symbols
2410 or alias definitions. As a result, explicit template instantiations
2411 are required when using C++. This will make it difficult if not
2412 impossible to build many C++ applications. You also can't generate
2413 debugging information when using the HP assembler with GCC.
2415 There are a number of issues to consider in selecting which linker to
2416 use with the 64-bit port. The GNU 64-bit linker can only create dynamic
2417 binaries. The @option{-static} option causes linking with archive
2418 libraries but doesn't produce a truly static binary. Dynamic binaries
2419 still require final binding by the dynamic loader to resolve a set of
2420 dynamic-loader-defined symbols. The default behavior of the HP linker
2421 is the same as the GNU linker. However, it can generate true 64-bit
2422 static binaries using the @option{+compat} option.
2424 The HP 64-bit linker doesn't support linkonce semantics. As a
2425 result, C++ programs have many more sections than they should.
2427 The GNU 64-bit linker has some issues with shared library support
2428 and exceptions. As a result, we only support libgcc in archive
2429 format. For similar reasons, dwarf2 unwind and exception support
2430 are disabled. The GNU linker also has problems creating binaries
2431 with @option{-static}. It doesn't provide stubs for internal
2432 calls to global functions in shared libraries, so these calls
2433 can't be overloaded.
2435 There are several possible approaches to building the distribution.
2436 Binutils can be built first using the HP tools. Then, the GCC
2437 distribution can be built. The second approach is to build GCC
2438 first using the HP tools, then build binutils, then rebuild GCC.
2439 There have been problems with various binary distributions, so
2440 it is best not to start from a binary distribution.
2442 Starting with GCC 3.4 an ISO C compiler is required to bootstrap.
2443 The bundled compiler supports only traditional C; you will need
2444 either HP's unbundled compiler, or a binary distribution of GCC@.
2446 This port still is undergoing significant development.
2451 @heading @anchor{i370-*-*}i370-*-*
2452 This port is very preliminary and has many known bugs. We hope to
2453 have a higher-quality port for this machine soon.
2458 @heading @anchor{*-*-linux-gnu}*-*-linux-gnu
2460 Versions of libstdc++-v3 starting with 3.2.1 require bugfixes present
2461 in glibc 2.2.5 and later. More information is available in the
2462 libstdc++-v3 documentation.
2464 If you use glibc 2.2 (or 2.1.9x), GCC 2.95.2 won't install
2465 out-of-the-box. You'll get compile errors while building @samp{libstdc++}.
2466 The patch @uref{glibc-2.2.patch,,glibc-2.2.patch}, that is to be
2467 applied in the GCC source tree, fixes the compatibility problems.
2469 Currently Glibc 2.2.3 (and older releases) and GCC 3.0 are out of sync
2470 since the latest exception handling changes for GCC@. Compiling glibc
2471 with GCC 3.0 will give a binary incompatible glibc and therefore cause
2472 lots of problems and might make your system completely unusable. This
2473 will definitely need fixes in glibc but might also need fixes in GCC@. We
2474 strongly advise to wait for glibc 2.2.4 and to read the release notes of
2475 glibc 2.2.4 whether patches for GCC 3.0 are needed. You can use glibc
2476 2.2.3 with GCC 3.0, just do not try to recompile it.
2481 @heading @anchor{ix86-*-linux*aout}i?86-*-linux*aout
2482 Use this configuration to generate @file{a.out} binaries on Linux-based
2483 GNU systems. This configuration is being superseded. You must use
2484 gas/binutils version 2.5.2 or later.
2489 @heading @anchor{ix86-*-linux*}i?86-*-linux*
2491 You will need binutils 2.9.1.0.15 or newer for exception handling to work.
2493 If you receive Signal 11 errors when building on GNU/Linux, then it is
2494 possible you have a hardware problem. Further information on this can be
2495 found on @uref{http://www.bitwizard.nl/sig11/,,www.bitwizard.nl}.
2500 @heading @anchor{ix86-*-sco}i?86-*-sco
2501 Compilation with RCC is recommended. Also, it may be a good idea to
2502 link with GNU malloc instead of the malloc that comes with the system.
2507 @heading @anchor{ix86-*-sco3.2v4}i?86-*-sco3.2v4
2508 Use this configuration for SCO release 3.2 version 4.
2513 @heading @anchor{ix86-*-sco3.2v5*}i?86-*-sco3.2v5*
2514 Use this for the SCO OpenServer Release 5 family of operating systems.
2516 Unlike earlier versions of GCC, the ability to generate COFF with this
2517 target is no longer provided.
2519 Earlier versions of GCC emitted DWARF 1 when generating ELF to allow
2520 the system debugger to be used. That support was too burdensome to
2521 maintain. GCC now emits only DWARF 2 for this target. This means you
2522 may use either the UDK debugger or GDB to debug programs built by this
2525 GCC is now only supported on releases 5.0.4 and later, and requires that
2526 you install Support Level Supplement OSS646B or later, and Support Level
2527 Supplement OSS631C or later. If you are using release 5.0.7 of
2528 OpenServer, you must have at least the first maintenance pack installed
2529 (this includes the relevant portions of OSS646). OSS646, also known as
2530 the "Execution Environment Update", provides updated link editors and
2531 assemblers, as well as updated standard C and math libraries. The C
2532 startup modules are also updated to support the System V gABI draft, and
2533 GCC relies on that behaviour. OSS631 provides a collection of commonly
2534 used open source libraries, some of which GCC depends on (such as GNU
2535 gettext and zlib). SCO OpenServer Release 5.0.7 has all of this built
2536 in by default, but OSS631C and later also apply to that release. Please
2538 @uref{ftp://ftp.sco.com/pub/openserver5,,ftp://ftp.sco.com/pub/openserver5}
2539 for the latest versions of these (and other potentially useful)
2542 Although there is support for using the native assembler, it is
2543 recommended that you configure GCC to use the GNU assembler. You do
2544 this by using the flags
2545 @uref{./configure.html#with-gnu-as,,@option{--with-gnu-as}}. You should
2546 use a modern version of GNU binutils. Version 2.13.2.1 was used for all
2547 testing. In general, only the @option{--with-gnu-as} option is tested.
2548 A modern bintuils (as well as a plethora of other development related
2549 GNU utilities) can be found in Support Level Supplement OSS658A, the
2550 "GNU Development Tools" package. See the SCO web and ftp sites for details.
2551 That package also contains the currently "officially supported" version of
2552 GCC, version 2.95.3. It is useful for bootstrapping this version.
2557 @heading @anchor{ix86-*-udk}i?86-*-udk
2559 This target emulates the SCO Universal Development Kit and requires that
2560 package be installed. (If it is installed, you will have a
2561 @file{/udk/usr/ccs/bin/cc} file present.) It's very much like the
2562 @samp{i?86-*-unixware7*} target
2563 but is meant to be used when hosting on a system where UDK isn't the
2564 default compiler such as OpenServer 5 or Unixware 2. This target will
2565 generate binaries that will run on OpenServer, Unixware 2, or Unixware 7,
2566 with the same warnings and caveats as the SCO UDK@.
2568 This target is a little tricky to build because we have to distinguish
2569 it from the native tools (so it gets headers, startups, and libraries
2570 from the right place) while making the tools not think we're actually
2571 building a cross compiler. The easiest way to do this is with a configure
2575 CC=/udk/usr/ccs/bin/cc @var{/your/path/to}/gcc/configure \
2576 --host=i686-pc-udk --target=i686-pc-udk --program-prefix=udk-
2579 @emph{You should substitute @samp{i686} in the above command with the appropriate
2580 processor for your host.}
2582 After the usual @samp{make bootstrap} and
2583 @samp{make install}, you can then access the UDK-targeted GCC
2584 tools by adding @command{udk-} before the commonly known name. For
2585 example, to invoke the C compiler, you would use @command{udk-gcc}.
2586 They will coexist peacefully with any native-target GCC tools you may
2593 @heading @anchor{ia64-*-linux}ia64-*-linux
2594 IA-64 processor (also known as IPF, or Itanium Processor Family)
2597 The toolchain is not completely finished, so requirements will continue
2599 GCC 3.0.1 and later require glibc 2.2.4.
2600 GCC 3.0.2 requires binutils from 2001-09-05 or later.
2601 GCC 3.0.1 requires binutils 2.11.1 or later.
2603 None of the following versions of GCC has an ABI that is compatible
2604 with any of the other versions in this list, with the exception that
2605 Red Hat 2.96 and Trillian 000171 are compatible with each other:
2606 3.0.2, 3.0.1, 3.0, Red Hat 2.96, and Trillian 000717.
2607 This primarily affects C++ programs and programs that create shared libraries.
2608 Because of these ABI incompatibilities, GCC 3.0.2 is not recommended for
2609 user programs on GNU/Linux systems built using earlier compiler releases.
2610 GCC 3.0.2 is recommended for compiling linux, the kernel.
2611 GCC 3.0.2 is believed to be fully ABI compliant, and hence no more major
2612 ABI changes are expected.
2616 <!-- rs6000-ibm-aix*, powerpc-ibm-aix* -->
2618 @heading @anchor{*-ibm-aix*}*-ibm-aix*
2619 AIX version 3 or older is no longer supported.
2621 AIX Make frequently has problems with GCC makefiles. GNU Make 3.76 or
2622 newer is recommended to build on this platform.
2624 Errors involving @code{alloca} when building GCC generally are due
2625 to an incorrect definition of @code{CC} in the Makefile or mixing files
2626 compiled with the native C compiler and GCC@. During the stage1 phase of
2627 the build, the native AIX compiler @strong{must} be invoked as @command{cc}
2628 (not @command{xlc}). Once @command{configure} has been informed of
2629 @command{xlc}, one needs to use @samp{make distclean} to remove the
2630 configure cache files and ensure that @env{CC} environment variable
2631 does not provide a definition that will confuse @command{configure}.
2632 If this error occurs during stage2 or later, then the problem most likely
2633 is the version of Make (see above).
2635 The native @command{as} and @command{ld} are recommended for bootstrapping
2636 on AIX 4 and required for bootstrapping on AIX 5L. The GNU Assembler
2637 reports that it supports WEAK symbols on AIX 4, which causes GCC to try to
2638 utilize weak symbol functionality although it is not supported. The GNU
2639 Assembler and Linker do not support AIX 5L sufficiently to bootstrap GCC.
2640 The native AIX tools do interoperate with GCC@.
2642 Building @file{libstdc++.a} requires a fix for an AIX Assembler bug
2643 APAR IY26685 (AIX 4.3) or APAR IY25528 (AIX 5.1).
2645 @samp{libstdc++} in GCC 3.2 increments the major version number of the
2646 shared object and GCC installation places the @file{libstdc++.a}
2647 shared library in a common location which will overwrite the GCC 3.1
2648 version of the shared library. Applications either need to be
2649 re-linked against the new shared library or the GCC 3.1 version of the
2650 @samp{libstdc++} shared object needs to be available to the AIX
2651 runtime loader. The GCC 3.1 @samp{libstdc++.so.4} shared object can
2652 be installed for runtime dynamic loading using the following steps to
2653 set the @samp{F_LOADONLY} flag in the shared object for @emph{each}
2654 multilib @file{libstdc++.a} installed:
2656 Extract the shared object from each the GCC 3.1 @file{libstdc++.a}
2659 % ar -x libstdc++.a libstdc++.so.4
2662 Enable the @samp{F_LOADONLY} flag so that the shared object will be
2663 available for runtime dynamic loading, but not linking:
2665 % strip -e libstdc++.so.4
2668 Archive the runtime-only shared object in the GCC 3.2
2669 @file{libstdc++.a} archive:
2671 % ar -q libstdc++.a libstdc++.so.4
2674 Linking executables and shared libraries may produce warnings of
2675 duplicate symbols. The assembly files generated by GCC for AIX always
2676 have included multiple symbol definitions for certain global variable
2677 and function declarations in the original program. The warnings should
2678 not prevent the linker from producing a correct library or runnable
2681 AIX 4.3 utilizes a ``large format'' archive to support both 32-bit and
2682 64-bit object modules. The routines provided in AIX 4.3.0 and AIX 4.3.1
2683 to parse archive libraries did not handle the new format correctly.
2684 These routines are used by GCC and result in error messages during
2685 linking such as ``not a COFF file''. The version of the routines shipped
2686 with AIX 4.3.1 should work for a 32-bit environment. The @option{-g}
2687 option of the archive command may be used to create archives of 32-bit
2688 objects using the original ``small format''. A correct version of the
2689 routines is shipped with AIX 4.3.2 and above.
2691 Some versions of the AIX binder (linker) can fail with a relocation
2692 overflow severe error when the @option{-bbigtoc} option is used to link
2693 GCC-produced object files into an executable that overflows the TOC@. A fix
2694 for APAR IX75823 (OVERFLOW DURING LINK WHEN USING GCC AND -BBIGTOC) is
2695 available from IBM Customer Support and from its
2696 @uref{http://techsupport.services.ibm.com/,,techsupport.services.ibm.com}
2697 website as PTF U455193.
2699 The AIX 4.3.2.1 linker (bos.rte.bind_cmds Level 4.3.2.1) will dump core
2700 with a segmentation fault when invoked by any version of GCC@. A fix for
2701 APAR IX87327 is available from IBM Customer Support and from its
2702 @uref{http://techsupport.services.ibm.com/,,techsupport.services.ibm.com}
2703 website as PTF U461879. This fix is incorporated in AIX 4.3.3 and above.
2705 The initial assembler shipped with AIX 4.3.0 generates incorrect object
2706 files. A fix for APAR IX74254 (64BIT DISASSEMBLED OUTPUT FROM COMPILER FAILS
2707 TO ASSEMBLE/BIND) is available from IBM Customer Support and from its
2708 @uref{http://techsupport.services.ibm.com/,,techsupport.services.ibm.com}
2709 website as PTF U453956. This fix is incorporated in AIX 4.3.1 and above.
2711 AIX provides National Language Support (NLS)@. Compilers and assemblers
2712 use NLS to support locale-specific representations of various data
2713 formats including floating-point numbers (e.g., @samp{.} vs @samp{,} for
2714 separating decimal fractions). There have been problems reported where
2715 GCC does not produce the same floating-point formats that the assembler
2716 expects. If one encounters this problem, set the @env{LANG}
2717 environment variable to @samp{C} or @samp{En_US}.
2719 By default, GCC for AIX 4.1 and above produces code that can be used on
2720 both Power or PowerPC processors.
2722 A default can be specified with the @option{-mcpu=@var{cpu_type}}
2723 switch and using the configure option @option{--with-cpu-@var{cpu_type}}.
2728 @heading @anchor{ip2k-*-elf}ip2k-*-elf
2729 Ubicom IP2022 micro controller.
2730 This configuration is intended for embedded systems.
2731 There are no standard Unix configurations.
2733 Use @samp{configure --target=ip2k-elf --enable-languages=c} to configure GCC@.
2738 @heading @anchor{m32r-*-elf}m32r-*-elf
2739 Renesas M32R processor.
2740 This configuration is intended for embedded systems.
2745 @heading @anchor{m6811-elf}m6811-elf
2746 Motorola 68HC11 family micro controllers. These are used in embedded
2747 applications. There are no standard Unix configurations.
2752 @heading @anchor{m6812-elf}m6812-elf
2753 Motorola 68HC12 family micro controllers. These are used in embedded
2754 applications. There are no standard Unix configurations.
2759 @heading @anchor{m68k-hp-hpux}m68k-hp-hpux
2760 HP 9000 series 300 or 400 running HP-UX@. HP-UX version 8.0 has a bug in
2761 the assembler that prevents compilation of GCC@. This
2762 bug manifests itself during the first stage of compilation, while
2763 building @file{libgcc2.a}:
2767 cc1: warning: `-g' option not supported on this version of GCC
2768 cc1: warning: `-g1' option not supported on this version of GCC
2769 ./xgcc: Internal compiler error: program as got fatal signal 11
2772 A patched version of the assembler is available as the file
2773 @uref{ftp://altdorf.ai.mit.edu/archive/cph/hpux-8.0-assembler}. If you
2774 have HP software support, the patch can also be obtained directly from
2775 HP, as described in the following note:
2778 This is the patched assembler, to patch SR#1653-010439, where the
2779 assembler aborts on floating point constants.
2781 The bug is not really in the assembler, but in the shared library
2782 version of the function ``cvtnum(3c)''. The bug on ``cvtnum(3c)'' is
2783 SR#4701-078451. Anyway, the attached assembler uses the archive
2784 library version of ``cvtnum(3c)'' and thus does not exhibit the bug.
2787 This patch is also known as PHCO_4484.
2789 In addition, if you wish to use gas, you must use
2790 gas version 2.1 or later, and you must use the GNU linker version 2.1 or
2791 later. Earlier versions of gas relied upon a program which converted the
2792 gas output into the native HP-UX format, but that program has not been
2793 kept up to date. gdb does not understand that native HP-UX format, so
2794 you must use gas if you wish to use gdb.
2796 On HP-UX version 8.05, but not on 8.07 or more recent versions, the
2797 @command{fixproto} shell script triggers a bug in the system shell. If you
2798 encounter this problem, upgrade your operating system or use BASH (the
2799 GNU shell) to run @command{fixproto}. This bug will cause the fixproto
2800 program to report an error of the form:
2803 ./fixproto: sh internal 1K buffer overflow
2806 To fix this, you can also change the first line of the fixproto script
2816 @heading @anchor{mips-*-*}mips-*-*
2817 If on a MIPS system you get an error message saying ``does not have gp
2818 sections for all it's [sic] sectons [sic]'', don't worry about it. This
2819 happens whenever you use GAS with the MIPS linker, but there is not
2820 really anything wrong, and it is okay to use the output file. You can
2821 stop such warnings by installing the GNU linker.
2823 It would be nice to extend GAS to produce the gp tables, but they are
2824 optional, and there should not be a warning about their absence.
2826 The libstdc++ atomic locking routines for MIPS targets requires MIPS II
2827 and later. A patch went in just after the GCC 3.3 release to
2828 make @samp{mips*-*-*} use the generic implementation instead. You can also
2829 configure for @samp{mipsel-elf} as a workaround. The
2830 @samp{mips*-*-linux*} target continues to use the MIPS II routines. More
2831 work on this is expected in future releases.
2836 @heading @anchor{mips-sgi-irix5}mips-sgi-irix5
2838 This configuration has considerable problems, which will be fixed in a
2841 In order to compile GCC on an SGI running IRIX 5, the ``compiler_dev.hdr''
2842 subsystem must be installed from the IDO CD-ROM supplied by Silicon
2843 Graphics. It is also available for download from
2844 @uref{http://www.sgi.com/developers/devtools/apis/ido.html,,http://www.sgi.com/developers/devtools/apis/ido.html}.
2846 @samp{make compare} may fail on version 5 of IRIX unless you add
2847 @option{-save-temps} to @code{CFLAGS}. On these systems, the name of the
2848 assembler input file is stored in the object file, and that makes
2849 comparison fail if it differs between the @code{stage1} and
2850 @code{stage2} compilations. The option @option{-save-temps} forces a
2851 fixed name to be used for the assembler input file, instead of a
2852 randomly chosen name in @file{/tmp}. Do not add @option{-save-temps}
2853 unless the comparisons fail without that option. If you do you
2854 @option{-save-temps}, you will have to manually delete the @samp{.i} and
2855 @samp{.s} files after each series of compilations.
2857 If you use the MIPS C compiler to bootstrap, it may be necessary
2858 to increase its table size for switch statements with the
2859 @option{-Wf,-XNg1500} option. If you use the @option{-O2}
2860 optimization option, you also need to use @option{-Olimit 3000}.
2862 To enable debugging under IRIX 5, you must use GNU @command{as} 2.11.2
2864 and use the @option{--with-gnu-as} configure option when configuring GCC.
2865 GNU @command{as} is distributed as part of the binutils package.
2866 When using release 2.11.2, you need to apply a patch
2867 @uref{http://sources.redhat.com/ml/binutils/2001-07/msg00352.html,,http://sources.redhat.com/ml/binutils/2001-07/msg00352.html}
2868 which will be included in the next release of binutils.
2870 When building GCC, the build process loops rebuilding @command{cc1} over
2871 and over again. This happens on @samp{mips-sgi-irix5.2}, and possibly
2872 other platforms. It has been reported that this is a known bug in the
2873 @command{make} shipped with IRIX 5.2. We recommend you use GNU
2874 @command{make} instead of the vendor supplied @command{make} program;
2875 however, you may have success with @command{smake} on IRIX 5.2 if you do
2876 not have GNU @command{make} available.
2881 @heading @anchor{mips-sgi-irix6}mips-sgi-irix6
2883 If you are using IRIX @command{cc} as your bootstrap compiler, you must
2884 ensure that the N32 ABI is in use. To test this, compile a simple C
2885 file with @command{cc} and then run @command{file} on the
2886 resulting object file. The output should look like:
2889 test.o: ELF N32 MSB @dots{}
2895 test.o: ELF 32-bit MSB @dots{}
2901 test.o: ELF 64-bit MSB @dots{}
2904 then your version of @command{cc} uses the O32 or N64 ABI by default. You
2905 should set the environment variable @env{CC} to @samp{cc -n32}
2906 before configuring GCC@.
2908 If you want the resulting @command{gcc} to run on old 32-bit systems
2909 with the MIPS R4400 CPU, you need to ensure that only code for the mips3
2910 instruction set architecture (ISA) is generated. While GCC 3.x does
2911 this correctly, both GCC 2.95 and SGI's MIPSpro @command{cc} may change
2912 the ISA depending on the machine where GCC is built. Using one of them
2913 as the bootstrap compiler may result in mips4 code, which won't run at
2914 all on mips3-only systems. For the test program above, you should see:
2917 test.o: ELF N32 MSB mips-3 @dots{}
2923 test.o: ELF N32 MSB mips-4 @dots{}
2926 instead, you should set the environment variable @env{CC} to @samp{cc
2927 -n32 -mips3} or @samp{gcc -mips3} respectively before configuring GCC@.
2929 GCC on IRIX 6 is usually built to support both the N32 and N64 ABIs. If
2930 you build GCC on a system that doesn't have the N64 libraries installed,
2931 you need to configure with @option{--disable-multilib} so GCC doesn't
2932 try to use them. Look for @file{/usr/lib64/libc.so.1} to see if you
2933 have the 64-bit libraries installed.
2935 You must @emph{not} use GNU @command{as} (which isn't built anyway as of
2936 binutils 2.11.2) on IRIX 6 platforms; doing so will only cause problems.
2938 GCC does not currently support generating O32 ABI binaries in the
2939 @samp{mips-sgi-irix6} configurations. It is possible to create a GCC
2940 with O32 ABI only support by configuring it for the @samp{mips-sgi-irix5}
2941 target and using a patched GNU @command{as} 2.11.2 as documented in the
2942 @uref{#mips-sgi-irix5,,@samp{mips-sgi-irix5}} section above. Using the
2943 native assembler requires patches to GCC which will be included in a
2944 future release. It is
2945 expected that O32 ABI support will be available again in a future release.
2947 The @option{--enable-threads} option doesn't currently work, a patch is
2948 in preparation for a future release. The @option{--enable-libgcj}
2949 option is disabled by default: IRIX 6 uses a very low default limit
2950 (20480) for the command line length. Although libtool contains a
2951 workaround for this problem, at least the N64 @samp{libgcj} is known not
2952 to build despite this, running into an internal error of the native
2953 @command{ld}. A sure fix is to increase this limit (@samp{ncargs}) to
2954 its maximum of 262144 bytes. If you have root access, you can use the
2955 @command{systune} command to do this.
2957 GCC does not correctly pass/return structures which are
2958 smaller than 16 bytes and which are not 8 bytes. The problem is very
2959 involved and difficult to fix. It affects a number of other targets also,
2960 but IRIX 6 is affected the most, because it is a 64-bit target, and 4 byte
2961 structures are common. The exact problem is that structures are being padded
2962 at the wrong end, e.g.@: a 4 byte structure is loaded into the lower 4 bytes
2963 of the register when it should be loaded into the upper 4 bytes of the
2966 GCC is consistent with itself, but not consistent with the SGI C compiler
2967 (and the SGI supplied runtime libraries), so the only failures that can
2968 happen are when there are library functions that take/return such
2969 structures. There are very few such library functions. Currently this
2970 is known to affect @code{inet_ntoa}, @code{inet_lnaof},
2971 @code{inet_netof}, @code{inet_makeaddr}, and @code{semctl}. Until the
2972 bug is fixed, GCC contains workarounds for the known affected functions.
2974 See @uref{http://freeware.sgi.com/,,http://freeware.sgi.com/} for more
2975 information about using GCC on IRIX platforms.
2980 @heading @anchor{powerpc*-*-*}powerpc-*-*
2982 You can specify a default version for the @option{-mcpu=@var{cpu_type}}
2983 switch by using the configure option @option{--with-cpu-@var{cpu_type}}.
2988 @heading @anchor{powerpc-*-darwin*}powerpc-*-darwin*
2989 PowerPC running Darwin (Mac OS X kernel).
2991 Pre-installed versions of Mac OS X may not include any developer tools,
2992 meaning that you will not be able to build GCC from source. Tool
2993 binaries are available at
2994 @uref{http://developer.apple.com/tools/compilers.html} (free
2995 registration required).
2997 The default stack limit of 512K is too small, which may cause compiles
2998 to fail with 'Bus error'. Set the stack larger, for instance
2999 by doing @samp{limit stack 800}. It's a good idea to use the GNU
3000 preprocessor instead of Apple's @file{cpp-precomp} during the first stage of
3001 bootstrapping; this is automatic when doing @samp{make bootstrap}, but
3002 to do it from the toplevel objdir you will need to say @samp{make
3003 CC='cc -no-cpp-precomp' bootstrap}.
3005 The version of GCC shipped by Apple typically includes a number of
3006 extensions not available in a standard GCC release. These extensions
3007 are generally specific to Mac programming.
3012 @heading @anchor{powerpc-*-elf}powerpc-*-elf, powerpc-*-sysv4
3013 PowerPC system in big endian mode, running System V.4.
3018 @heading @anchor{powerpc-*-linux-gnu*}powerpc-*-linux-gnu*
3021 @uref{ftp://ftp.kernel.org/pub/linux/devel/binutils,,binutils 2.13.90.0.10}
3022 or newer for a working GCC@.
3027 @heading @anchor{powerpc-*-netbsd*}powerpc-*-netbsd*
3028 PowerPC system in big endian mode running NetBSD@. To build the
3029 documentation you will need Texinfo version 4.2 (NetBSD 1.5.1 included
3030 Texinfo version 3.12).
3035 @heading @anchor{powerpc-*-eabisim}powerpc-*-eabisim
3036 Embedded PowerPC system in big endian mode for use in running under the
3042 @heading @anchor{powerpc-*-eabi}powerpc-*-eabi
3043 Embedded PowerPC system in big endian mode.
3048 @heading @anchor{powerpcle-*-elf}powerpcle-*-elf, powerpcle-*-sysv4
3049 PowerPC system in little endian mode, running System V.4.
3054 @heading @anchor{powerpcle-*-eabisim}powerpcle-*-eabisim
3055 Embedded PowerPC system in little endian mode for use in running under
3061 @heading @anchor{powerpcle-*-eabi}powerpcle-*-eabi
3062 Embedded PowerPC system in little endian mode.
3067 @heading @anchor{powerpcle-*-winnt}powerpcle-*-winnt, powerpcle-*-pe
3068 PowerPC system in little endian mode running Windows NT@.
3073 @heading @anchor{s390-*-linux*}s390-*-linux*
3074 S/390 system running Linux for S/390@.
3079 @heading @anchor{s390x-*-linux*}s390x-*-linux*
3080 zSeries system (64-bit) running Linux for zSeries@.
3085 @c Please use Solaris 2 to refer to all release of Solaris, starting
3086 @c with 2.0 until 2.6, 7, and 8. Solaris 1 was a marketing name for
3087 @c SunOS 4 releases which we don't use to avoid confusion. Solaris
3088 @c alone is too unspecific and must be avoided.
3089 @heading @anchor{*-*-solaris2*}*-*-solaris2*
3091 Sun does not ship a C compiler with Solaris 2. To bootstrap and install
3092 GCC you first have to install a pre-built compiler, see our
3093 @uref{binaries.html,,binaries page} for details.
3095 The Solaris 2 @command{/bin/sh} will often fail to configure
3096 @file{libstdc++-v3}, @file{boehm-gc} or @file{libjava}. We therefore
3097 recommend to set @env{CONFIG_SHELL} to @command{/bin/ksh} in your
3100 Solaris 2 comes with a number of optional OS packages. Some of these
3101 are needed to use GCC fully, namely @code{SUNWarc},
3102 @code{SUNWbtool}, @code{SUNWesu}, @code{SUNWhea}, @code{SUNWlibm},
3103 @code{SUNWsprot}, and @code{SUNWtoo}. If you did not install all
3104 optional packages when installing Solaris 2, you will need to verify that
3105 the packages that GCC needs are installed.
3107 To check whether an optional package is installed, use
3108 the @command{pkginfo} command. To add an optional package, use the
3109 @command{pkgadd} command. For further details, see the Solaris 2
3112 Trying to use the linker and other tools in
3113 @file{/usr/ucb} to install GCC has been observed to cause trouble.
3114 For example, the linker may hang indefinitely. The fix is to remove
3115 @file{/usr/ucb} from your @env{PATH}.
3117 All releases of GNU binutils prior to 2.11.2 have known bugs on this
3118 platform. We recommend the use of GNU binutils 2.11.2 or the vendor
3119 tools (Sun @command{as}, Sun @command{ld}).
3121 Sun bug 4296832 turns up when compiling X11 headers with GCC 2.95 or
3122 newer: @command{g++} will complain that types are missing. These headers assume
3123 that omitting the type means @code{int}; this assumption worked for C89 but
3124 is wrong for C++, and is now wrong for C99 also.
3126 @command{g++} accepts such (invalid) constructs with the option
3127 @option{-fpermissive}; it
3128 will assume that any missing type is @code{int} (as defined by C89).
3130 There are patches for Solaris 2.6 (105633-56 or newer for SPARC,
3131 106248-42 or newer for Intel), Solaris 7 (108376-21 or newer for SPARC,
3132 108377-20 for Intel), and Solaris 8 (108652-24 or newer for SPARC,
3133 108653-22 for Intel) that fix this bug.
3138 @heading @anchor{sparc-sun-solaris2*}sparc-sun-solaris2*
3140 When GCC is configured to use binutils 2.11.2 or later the binaries
3141 produced are smaller than the ones produced using Sun's native tools;
3142 this difference is quite significant for binaries containing debugging
3145 Sun @command{as} 4.x is broken in that it cannot cope with long symbol names.
3146 A typical error message might look similar to the following:
3149 /usr/ccs/bin/as: "/var/tmp/ccMsw135.s", line 11041: error:
3150 can't compute value of an expression involving an external symbol.
3153 This is Sun bug 4237974. This is fixed with patch 108908-02 for Solaris
3154 2.6 and has been fixed in later (5.x) versions of the assembler,
3155 starting with Solaris 7.
3157 Starting with Solaris 7, the operating system is capable of executing
3158 64-bit SPARC V9 binaries. GCC 3.1 and later properly supports
3159 this; the @option{-m64} option enables 64-bit code generation.
3160 However, if all you want is code tuned for the UltraSPARC CPU, you
3161 should try the @option{-mtune=ultrasparc} option instead, which produces
3162 code that, unlike full 64-bit code, can still run on non-UltraSPARC
3165 When configuring on a Solaris 7 or later system that is running a kernel
3166 that supports only 32-bit binaries, one must configure with
3167 @option{--disable-multilib}, since we will not be able to build the
3168 64-bit target libraries.
3173 @heading @anchor{sparc-sun-solaris2.7}sparc-sun-solaris2.7
3175 Sun patch 107058-01 (1999-01-13) for Solaris 7/SPARC triggers a bug in
3176 the dynamic linker. This problem (Sun bug 4210064) affects GCC 2.8
3177 and later, including all EGCS releases. Sun formerly recommended
3178 107058-01 for all Solaris 7 users, but around 1999-09-01 it started to
3179 recommend it only for people who use Sun's compilers.
3181 Here are some workarounds to this problem:
3184 Do not install Sun patch 107058-01 until after Sun releases a
3185 complete patch for bug 4210064. This is the simplest course to take,
3186 unless you must also use Sun's C compiler. Unfortunately 107058-01
3187 is preinstalled on some new Solaris 7-based hosts, so you may have to
3191 Copy the original, unpatched Solaris 7
3192 @command{/usr/ccs/bin/as} into
3193 @command{/usr/local/lib/gcc-lib/sparc-sun-solaris2.7/3.1/as},
3194 adjusting the latter name to fit your local conventions and software
3198 Install Sun patch 106950-03 (1999-05-25) or later. Nobody with
3199 both 107058-01 and 106950-03 installed has reported the bug with GCC
3200 and Sun's dynamic linker. This last course of action is riskiest,
3201 for two reasons. First, you must install 106950 on all hosts that
3202 run code generated by GCC; it doesn't suffice to install it only on
3203 the hosts that run GCC itself. Second, Sun says that 106950-03 is
3204 only a partial fix for bug 4210064, but Sun doesn't know whether the
3205 partial fix is adequate for GCC@. Revision -08 or later should fix
3206 the bug. The current (as of 2001-09-24) revision is -14, and is included in
3207 the Solaris 7 Recommended Patch Cluster.
3210 GCC 3.3 triggers a bug in version 5.0 Alpha 03/27/98 of the Sun assembler,
3211 which causes a bootstrap failure when linking the 64-bit shared version of
3212 libgcc. A typical error message is:
3215 ld: fatal: relocation error: R_SPARC_32: file libgcc/sparcv9/_muldi3.o:
3216 symbol <unknown>: offset 0xffffffff7ec133e7 is non-aligned.
3219 This bug has been fixed in the final 5.0 version of the assembler.
3224 @heading @anchor{sparc-*-linux*}sparc-*-linux*
3226 GCC versions 3.0 and higher require binutils 2.11.2 and glibc 2.2.4
3227 or newer on this platform. All earlier binutils and glibc
3228 releases mishandled unaligned relocations on @code{sparc-*-*} targets.
3234 @heading @anchor{sparc64-*-solaris2*}sparc64-*-solaris2*
3236 The following compiler flags must be specified in the configure
3237 step in order to bootstrap this target with the Sun compiler:
3240 % CC="cc -xildoff -xarch=v9" @var{srcdir}/configure [@var{options}] [@var{target}]
3243 @option{-xildoff} turns off the incremental linker, and @option{-xarch=v9}
3244 specifies the SPARC-V9 architecture to the Sun linker and assembler.
3249 @heading @anchor{sparcv9-*-solaris2*}sparcv9-*-solaris2*
3251 This is a synonym for sparc64-*-solaris2*.
3256 @heading @anchor{#*-*-sysv*}*-*-sysv*
3257 On System V release 3, you may get this error message
3261 ld fatal: failed to write symbol name @var{something}
3262 in strings table for file @var{whatever}
3265 This probably indicates that the disk is full or your ulimit won't allow
3266 the file to be as large as it needs to be.
3268 This problem can also result because the kernel parameter @code{MAXUMEM}
3269 is too small. If so, you must regenerate the kernel and make the value
3270 much larger. The default value is reported to be 1024; a value of 32768
3271 is said to work. Smaller values may also work.
3273 On System V, if you get an error like this,
3276 /usr/local/lib/bison.simple: In function `yyparse':
3277 /usr/local/lib/bison.simple:625: virtual memory exhausted
3281 that too indicates a problem with disk space, ulimit, or @code{MAXUMEM}.
3283 On a System V release 4 system, make sure @file{/usr/bin} precedes
3284 @file{/usr/ucb} in @code{PATH}. The @command{cc} command in
3285 @file{/usr/ucb} uses libraries which have bugs.
3290 @heading @anchor{vax-dec-ultrix}vax-dec-ultrix
3291 Don't try compiling with VAX C (@command{vcc}). It produces incorrect code
3292 in some cases (for example, when @code{alloca} is used).
3297 @heading @anchor{*-*-vxworks*}*-*-vxworks*
3298 Support for VxWorks is in flux. At present GCC supports @emph{only} the
3299 very recent VxWorks 5.5 (aka Tornado 2.2) release, and only on PowerPC.
3300 We welcome patches for other architectures supported by VxWorks 5.5.
3301 Support for VxWorks AE would also be welcome; we believe this is merely
3302 a matter of writing an appropriate ``configlette'' (see below). We are
3303 not interested in supporting older, a.out or COFF-based, versions of
3306 VxWorks comes with an older version of GCC installed in
3307 @file{@var{$WIND_BASE}/host}; we recommend you do not overwrite it.
3308 Choose an installation @var{prefix} entirely outside @var{$WIND_BASE}.
3309 Before running @command{configure}, create the directories @file{@var{prefix}}
3310 and @file{@var{prefix}/bin}. Link or copy the appropriate assembler,
3311 linker, etc. into @file{@var{prefix}/bin}, and set your @var{PATH} to
3312 include that directory while running both @command{configure} and
3315 You must give @command{configure} the
3316 @option{--with-headers=@var{$WIND_BASE}/target/h} switch so that it can
3317 find the VxWorks system headers. Since VxWorks is a cross compilation
3318 target only, you must also specify @option{--target=@var{target}}.
3319 @command{configure} will attempt to create the directory
3320 @file{@var{prefix}/@var{target}/sys-include} and copy files into it;
3321 make sure the user running @command{configure} has sufficient privilege
3324 GCC's exception handling runtime requires a special ``configlette''
3325 module, @file{contrib/gthr_supp_vxw_5x.c}. Follow the instructions in
3326 that file to add the module to your kernel build. (Future versions of
3327 VxWorks will incorporate this module.)
3332 @heading @anchor{xtensa-*-elf}xtensa-*-elf
3334 This target is intended for embedded Xtensa systems using the
3335 @samp{newlib} C library. It uses ELF but does not support shared
3336 objects. Designed-defined instructions specified via the
3337 Tensilica Instruction Extension (TIE) language are only supported
3338 through inline assembly.
3340 The Xtensa configuration information must be specified prior to
3341 building GCC@. The @file{gcc/config/xtensa/xtensa-config.h} header
3342 file contains the configuration information. If you created your
3343 own Xtensa configuration with the Xtensa Processor Generator, the
3344 downloaded files include a customized copy of this header file,
3345 which you can use to replace the default header file.
3350 @heading @anchor{xtensa-*-linux*}xtensa-*-linux*
3352 This target is for Xtensa systems running GNU/Linux. It supports ELF
3353 shared objects and the GNU C library (glibc). It also generates
3354 position-independent code (PIC) regardless of whether the
3355 @option{-fpic} or @option{-fPIC} options are used. In other
3356 respects, this target is the same as the
3357 @uref{#xtensa-*-elf,,@samp{xtensa-*-elf}} target.
3362 @heading @anchor{windows}Microsoft Windows (32-bit)
3364 A port of GCC 2.95.2 and 3.x is included with the
3365 @uref{http://www.cygwin.com/,,Cygwin environment}.
3367 Current (as of early 2001) snapshots of GCC will build under Cygwin
3368 without modification.
3370 GCC does not currently build with Microsoft's C++ compiler and there
3371 are no plans to make it do so.
3376 @heading @anchor{os2}OS/2
3378 GCC does not currently support OS/2. However, Andrew Zabolotny has been
3379 working on a generic OS/2 port with pgcc. The current code can be found
3380 at @uref{http://www.goof.com/pcg/os2/,,http://www.goof.com/pcg/os2/}.
3382 An older copy of GCC 2.8.1 is included with the EMX tools available at
3383 @uref{ftp://ftp.leo.org/pub/comp/os/os2/leo/devtools/emx+gcc/,,
3384 ftp://ftp.leo.org/pub/comp/os/os2/leo/devtools/emx+gcc/}.
3389 @heading @anchor{older}Older systems
3391 GCC contains support files for many older (1980s and early
3392 1990s) Unix variants. For the most part, support for these systems
3393 has not been deliberately removed, but it has not been maintained for
3394 several years and may suffer from bitrot.
3396 Starting with GCC 3.1, each release has a list of ``obsoleted'' systems.
3397 Support for these systems is still present in that release, but
3398 @command{configure} will fail unless the @option{--enable-obsolete}
3399 option is given. Unless a maintainer steps forward, support for these
3400 systems will be removed from the next release of GCC@.
3402 Support for old systems as hosts for GCC can cause problems if the
3403 workarounds for compiler, library and operating system bugs affect the
3404 cleanliness or maintainability of the rest of GCC@. In some cases, to
3405 bring GCC up on such a system, if still possible with current GCC, may
3406 require first installing an old version of GCC which did work on that
3407 system, and using it to compile a more recent GCC, to avoid bugs in the
3408 vendor compiler. Old releases of GCC 1 and GCC 2 are available in the
3409 @file{old-releases} directory on the @uref{../mirrors.html,,GCC mirror
3410 sites}. Header bugs may generally be avoided using
3411 @command{fixincludes}, but bugs or deficiencies in libraries and the
3412 operating system may still cause problems.
3414 Support for older systems as targets for cross-compilation is less
3415 problematic than support for them as hosts for GCC; if an enthusiast
3416 wishes to make such a target work again (including resurrecting any of
3417 the targets that never worked with GCC 2, starting from the last CVS
3418 version before they were removed), patches
3419 @uref{../contribute.html,,following the usual requirements} would be
3420 likely to be accepted, since they should not affect the support for more
3423 For some systems, old versions of GNU binutils may also be useful,
3424 and are available from @file{pub/binutils/old-releases} on
3425 @uref{http://sources.redhat.com/mirrors.html,,sources.redhat.com mirror sites}.
3427 Some of the information on specific systems above relates to
3428 such older systems, but much of the information
3429 about GCC on such systems (which may no longer be applicable to
3430 current GCC) is to be found in the GCC texinfo manual.
3435 @heading @anchor{elf_targets}all ELF targets (SVR4, Solaris 2, etc.)
3437 C++ support is significantly better on ELF targets if you use the
3438 @uref{./configure.html#with-gnu-ld,,GNU linker}; duplicate copies of
3439 inlines, vtables and template instantiations will be discarded
3448 @uref{./index.html,,Return to the GCC Installation page}
3452 @c ***Old documentation******************************************************
3454 @include install-old.texi
3460 @uref{./index.html,,Return to the GCC Installation page}
3464 @c ***GFDL********************************************************************
3472 @uref{./index.html,,Return to the GCC Installation page}
3476 @c ***************************************************************************
3477 @c Part 6 The End of the Document
3479 @comment node-name, next, previous, up
3480 @node Concept Index, , GNU Free Documentation License, Top
3484 @unnumbered Concept Index