]>
Commit | Line | Data |
---|---|---|
f4017d20 | 1 | dnl Process this file with autoconf to produce a configure script. |
f7934be8 | 2 | dnl Note we do not use AC_PREREQ here! See aclocal.m4 for what we use instead. |
f318beb8 | 3 | AC_INIT([GNU C Library], [(see version.h)], [http://sourceware.org/bugzilla/], [glibc]) |
5d77b1da | 4 | AC_CONFIG_SRCDIR([include/features.h]) |
6b7f6183 RM |
5 | AC_CONFIG_HEADERS([config.h]) |
6 | AC_CONFIG_AUX_DIR([scripts]) | |
28f540f4 | 7 | |
8b748aed JM |
8 | ACX_PKGVERSION([GNU libc]) |
9 | ACX_BUGURL([http://www.gnu.org/software/libc/bugs.html]) | |
10 | AC_DEFINE_UNQUOTED([PKGVERSION], ["$PKGVERSION"], | |
11 | [Package description]) | |
12 | AC_DEFINE_UNQUOTED([REPORT_BUGS_TO], ["$REPORT_BUGS_TO"], | |
13 | [Bug reporting address]) | |
14 | ||
918b5606 L |
15 | # Glibc should not depend on any header files |
16 | AC_DEFUN([_AC_INCLUDES_DEFAULT_REQUIREMENTS], | |
17 | [m4_divert_text([DEFAULTS], | |
18 | [ac_includes_default='/* none */'])]) | |
19 | ||
bb931195 TS |
20 | # We require GCC, and by default use its preprocessor. Override AC_PROG_CPP |
21 | # here to work around the Autoconf issue discussed in | |
22 | # <http://sourceware.org/ml/libc-alpha/2013-01/msg00721.html>. | |
23 | AC_DEFUN([AC_PROG_CPP], | |
24 | [AC_REQUIRE([AC_PROG_CC])dnl | |
25 | AC_ARG_VAR([CPP], [C preprocessor])dnl | |
26 | _AC_ARG_VAR_CPPFLAGS()dnl | |
27 | # On Suns, sometimes $CPP names a directory. | |
28 | if test -n "$CPP" && test -d "$CPP"; then | |
29 | CPP= | |
30 | fi | |
31 | if test -z "$CPP"; then | |
32 | CPP="$CC -E" | |
33 | fi | |
34 | AC_SUBST(CPP)dnl | |
35 | ])# AC_PROG_CPP | |
36 | ||
b5a5da23 TS |
37 | # We require GCC. Override _AC_PROG_CC_C89 here to work around the Autoconf |
38 | # issue discussed in | |
39 | # <http://sourceware.org/ml/libc-alpha/2013-01/msg00757.html>. | |
40 | AC_DEFUN([_AC_PROG_CC_C89], [[$1]]) | |
41 | ||
7967983f RM |
42 | dnl This is here so we can set $subdirs directly based on configure fragments. |
43 | AC_CONFIG_SUBDIRS() | |
44 | ||
c16a054d AS |
45 | AC_CANONICAL_HOST |
46 | ||
c0bac8b0 UD |
47 | AC_PROG_CC |
48 | if test $host != $build; then | |
49 | AC_CHECK_PROGS(BUILD_CC, gcc cc) | |
50 | fi | |
51 | AC_SUBST(cross_compiling) | |
52 | AC_PROG_CPP | |
e4693aa7 RM |
53 | AC_CHECK_TOOL(READELF, readelf, false) |
54 | ||
c0bac8b0 UD |
55 | # We need the C++ compiler only for testing. |
56 | AC_PROG_CXX | |
e4693aa7 RM |
57 | # It's useless to us if it can't link programs (e.g. missing -lstdc++). |
58 | AC_CACHE_CHECK([whether $CXX can link programs], libc_cv_cxx_link_ok, [dnl | |
59 | AC_LANG_PUSH([C++]) | |
d337ceb7 | 60 | # Default, dynamic case. |
e4693aa7 RM |
61 | AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], |
62 | [libc_cv_cxx_link_ok=yes], | |
63 | [libc_cv_cxx_link_ok=no]) | |
d337ceb7 FW |
64 | # Static case. |
65 | old_LDFLAGS="$LDFLAGS" | |
66 | LDFLAGS="$LDFLAGS -static" | |
67 | AC_LINK_IFELSE([AC_LANG_SOURCE([ | |
68 | #include <iostream> | |
69 | ||
70 | int | |
71 | main() | |
72 | { | |
73 | std::cout << "Hello, world!"; | |
74 | return 0; | |
75 | } | |
76 | ])], | |
77 | [], | |
78 | [libc_cv_cxx_link_ok=no]) | |
79 | LDFLAGS="$old_LDFLAGS" | |
e4693aa7 RM |
80 | AC_LANG_POP([C++])]) |
81 | AS_IF([test $libc_cv_cxx_link_ok != yes], [CXX=]) | |
c0bac8b0 | 82 | |
db340c90 | 83 | if test "`cd $srcdir; pwd -P`" = "`pwd -P`"; then |
c72637d4 RM |
84 | AC_MSG_ERROR([you must configure in a separate build directory]) |
85 | fi | |
86 | ||
28f540f4 RM |
87 | # This will get text that should go into config.make. |
88 | config_vars= | |
89 | ||
c8f3e6db | 90 | # Check for a --with-gd argument and set libgd-LDFLAGS in config.make. |
6b7f6183 | 91 | AC_ARG_WITH([gd], |
77e8bddf AS |
92 | AC_HELP_STRING([--with-gd=DIR], |
93 | [find libgd include dir and library with prefix DIR]), | |
c8f3e6db UD |
94 | [dnl |
95 | case "$with_gd" in | |
f5f7239f UD |
96 | yes|''|no) ;; |
97 | *) libgd_include="-I$withval/include" | |
c8f3e6db UD |
98 | libgd_ldflags="-L$withval/lib" ;; |
99 | esac | |
100 | ]) | |
6b7f6183 | 101 | AC_ARG_WITH([gd-include], |
77e8bddf AS |
102 | AC_HELP_STRING([--with-gd-include=DIR], |
103 | [find libgd include files in DIR]), | |
104 | [dnl | |
f5f7239f UD |
105 | case "$with_gd_include" in |
106 | ''|no) ;; | |
107 | *) libgd_include="-I$withval" ;; | |
108 | esac | |
109 | ]) | |
6b7f6183 | 110 | AC_ARG_WITH([gd-lib], |
77e8bddf AS |
111 | AC_HELP_STRING([--with-gd-lib=DIR], |
112 | [find libgd library files in DIR]), | |
113 | [dnl | |
f5f7239f UD |
114 | case "$with_gd_lib" in |
115 | ''|no) ;; | |
116 | *) libgd_ldflags="-L$withval" ;; | |
117 | esac | |
118 | ]) | |
119 | ||
120 | if test -n "$libgd_include"; then | |
121 | config_vars="$config_vars | |
cf90163d | 122 | CFLAGS-memusagestat.c = $libgd_include" |
f5f7239f UD |
123 | fi |
124 | if test -n "$libgd_ldflags"; then | |
125 | config_vars="$config_vars | |
126 | libgd-LDFLAGS = $libgd_ldflags" | |
127 | fi | |
28f540f4 | 128 | |
ff3d7ed3 | 129 | dnl Arguments to specify presence of other packages/features. |
6b7f6183 | 130 | AC_ARG_WITH([fp], |
77e8bddf AS |
131 | AC_HELP_STRING([--with-fp], |
132 | [if using floating-point hardware @<:@default=yes@:>@]), | |
6b7f6183 RM |
133 | [with_fp=$withval], |
134 | [with_fp=yes]) | |
675322a5 | 135 | AC_SUBST(with_fp) |
6b7f6183 | 136 | AC_ARG_WITH([binutils], |
77e8bddf AS |
137 | AC_HELP_STRING([--with-binutils=PATH], |
138 | [specify location of binutils (as and ld)]), | |
6b7f6183 RM |
139 | [path_binutils=$withval], |
140 | [path_binutils='']) | |
2fff3d93 | 141 | AC_ARG_WITH([selinux], |
77e8bddf AS |
142 | AC_HELP_STRING([--with-selinux], |
143 | [if building with SELinux support]), | |
2fff3d93 UD |
144 | [with_selinux=$withval], |
145 | [with_selinux=auto]) | |
28f540f4 | 146 | |
6b7f6183 | 147 | AC_ARG_WITH([headers], |
77e8bddf AS |
148 | AC_HELP_STRING([--with-headers=PATH], |
149 | [location of system headers to use | |
6b7f6183 RM |
150 | (for example /usr/src/linux/include) |
151 | @<:@default=compiler default@:>@]), | |
152 | [sysheaders=$withval], | |
153 | [sysheaders='']) | |
c91c505f | 154 | AC_SUBST(sysheaders) |
dbe7a0f5 | 155 | |
f781ef40 RM |
156 | AC_SUBST(use_default_link) |
157 | AC_ARG_WITH([default-link], | |
158 | AC_HELP_STRING([--with-default-link], | |
fd5e21c7 | 159 | [do not use explicit linker scripts]), |
f781ef40 | 160 | [use_default_link=$withval], |
fd5e21c7 | 161 | [use_default_link=default]) |
f781ef40 | 162 | |
6b7f6183 | 163 | AC_ARG_ENABLE([sanity-checks], |
77e8bddf AS |
164 | AC_HELP_STRING([--disable-sanity-checks], |
165 | [really do not use threads (should not be used except in special situations) @<:@default=yes@:>@]), | |
6b7f6183 RM |
166 | [enable_sanity=$enableval], |
167 | [enable_sanity=yes]) | |
a18f587d | 168 | |
6b7f6183 | 169 | AC_ARG_ENABLE([shared], |
77e8bddf | 170 | AC_HELP_STRING([--enable-shared], |
a0da5fe1 | 171 | [build shared library @<:@default=yes if GNU ld@:>@]), |
6b7f6183 | 172 | [shared=$enableval], |
a0da5fe1 | 173 | [shared=yes]) |
6b7f6183 | 174 | AC_ARG_ENABLE([profile], |
77e8bddf AS |
175 | AC_HELP_STRING([--enable-profile], |
176 | [build profiled library @<:@default=no@:>@]), | |
6b7f6183 | 177 | [profile=$enableval], |
11bf311e | 178 | [profile=no]) |
1cba4036 MF |
179 | AC_ARG_ENABLE([timezone-tools], |
180 | AC_HELP_STRING([--disable-timezone-tools], | |
44f826e3 | 181 | [do not install timezone tools @<:@default=install@:>@]), |
1cba4036 MF |
182 | [enable_timezone_tools=$enableval], |
183 | [enable_timezone_tools=yes]) | |
184 | AC_SUBST(enable_timezone_tools) | |
6b7f6183 | 185 | |
740b3dbe L |
186 | AC_ARG_ENABLE([hardcoded-path-in-tests], |
187 | AC_HELP_STRING([--enable-hardcoded-path-in-tests], | |
188 | [hardcode newly built glibc path in tests @<:@default=no@:>@]), | |
189 | [hardcoded_path_in_tests=$enableval], | |
190 | [hardcoded_path_in_tests=no]) | |
191 | AC_SUBST(hardcoded_path_in_tests) | |
192 | ||
35f1e827 UD |
193 | AC_ARG_ENABLE([stackguard-randomization], |
194 | AC_HELP_STRING([--enable-stackguard-randomization], | |
195 | [initialize __stack_chk_guard canary with a random number at program start]), | |
196 | [enable_stackguard_randomize=$enableval], | |
197 | [enable_stackguard_randomize=no]) | |
198 | if test "$enable_stackguard_randomize" = yes; then | |
199 | AC_DEFINE(ENABLE_STACKGUARD_RANDOMIZE) | |
200 | fi | |
201 | ||
1717da59 AK |
202 | AC_ARG_ENABLE([lock-elision], |
203 | AC_HELP_STRING([--enable-lock-elision[=yes/no]], | |
52dfbe13 | 204 | [Enable lock elision for pthread mutexes by default]), |
1717da59 AK |
205 | [enable_lock_elision=$enableval], |
206 | [enable_lock_elision=no]) | |
5a414ff7 | 207 | AC_SUBST(enable_lock_elision) |
1717da59 AK |
208 | if test "$enable_lock_elision" = yes ; then |
209 | AC_DEFINE(ENABLE_LOCK_ELISION) | |
210 | fi | |
211 | ||
6b3a2224 | 212 | dnl Generic infrastructure for drop-in additions to libc. |
6b7f6183 | 213 | AC_ARG_ENABLE([add-ons], |
77e8bddf AS |
214 | AC_HELP_STRING([--enable-add-ons@<:@=DIRS...@:>@], |
215 | [configure and build add-ons in DIR1,DIR2,... | |
216 | search for add-ons if no parameter given]), | |
e0a3ed4f | 217 | , [enable_add_ons=yes]) |
61952351 | 218 | |
6b7f6183 | 219 | AC_ARG_ENABLE([hidden-plt], |
77e8bddf AS |
220 | AC_HELP_STRING([--disable-hidden-plt], |
221 | [do not hide internal function calls to avoid PLT]), | |
6b7f6183 RM |
222 | [hidden=$enableval], |
223 | [hidden=yes]) | |
749a9a4f RM |
224 | if test "x$hidden" = xno; then |
225 | AC_DEFINE(NO_HIDDEN) | |
226 | fi | |
227 | ||
4df8c11d UD |
228 | AC_ARG_ENABLE([bind-now], |
229 | AC_HELP_STRING([--enable-bind-now], | |
230 | [disable lazy relocations in DSOs]), | |
231 | [bindnow=$enableval], | |
232 | [bindnow=no]) | |
233 | AC_SUBST(bindnow) | |
6901def6 L |
234 | if test "x$bindnow" = xyes; then |
235 | AC_DEFINE(BIND_NOW) | |
236 | fi | |
4df8c11d | 237 | |
03baef1c NA |
238 | dnl Build glibc with -fstack-protector, -fstack-protector-all, or |
239 | dnl -fstack-protector-strong. | |
240 | AC_ARG_ENABLE([stack-protector], | |
241 | AC_HELP_STRING([--enable-stack-protector=@<:@yes|no|all|strong@:>@], | |
242 | [Use -fstack-protector[-all|-strong] to detect glibc buffer overflows]), | |
243 | [enable_stack_protector=$enableval], | |
244 | [enable_stack_protector=no]) | |
245 | case "$enable_stack_protector" in | |
246 | all|yes|no|strong) ;; | |
247 | *) AC_MSG_ERROR([Not a valid argument for --enable-stack-protector: \"$enable_stack_protector\"]);; | |
248 | esac | |
249 | ||
5107cf1d UD |
250 | dnl On some platforms we cannot use dynamic loading. We must provide |
251 | dnl static NSS modules. | |
6b7f6183 | 252 | AC_ARG_ENABLE([static-nss], |
77e8bddf AS |
253 | AC_HELP_STRING([--enable-static-nss], |
254 | [build static NSS modules @<:@default=no@:>@]), | |
6b7f6183 RM |
255 | [static_nss=$enableval], |
256 | [static_nss=no]) | |
834cef7c UD |
257 | dnl Enable static NSS also if we build no shared objects. |
258 | if test x"$static_nss" = xyes || test x"$shared" = xno; then | |
3172f58f | 259 | static_nss=yes |
5107cf1d UD |
260 | AC_DEFINE(DO_STATIC_NSS) |
261 | fi | |
262 | ||
6b7f6183 | 263 | AC_ARG_ENABLE([force-install], |
77e8bddf AS |
264 | AC_HELP_STRING([--disable-force-install], |
265 | [don't force installation of files from this package, even if they are older than the installed files]), | |
6b7f6183 RM |
266 | [force_install=$enableval], |
267 | [force_install=yes]) | |
73237de3 UD |
268 | AC_SUBST(force_install) |
269 | ||
8894bad3 AM |
270 | AC_ARG_ENABLE([maintainer-mode], |
271 | AC_HELP_STRING([--enable-maintainer-mode], | |
272 | [enable make rules and dependencies not useful (and sometimes confusing) to the casual installer]), | |
273 | [maintainer=$enableval], | |
274 | [maintainer=no]) | |
275 | ||
958f238f UD |
276 | dnl On some platforms we allow dropping compatibility with all kernel |
277 | dnl versions. | |
6b7f6183 | 278 | AC_ARG_ENABLE([kernel], |
77e8bddf AS |
279 | AC_HELP_STRING([--enable-kernel=VERSION], |
280 | [compile for compatibility with kernel not older than VERSION]), | |
6b7f6183 RM |
281 | [minimum_kernel=$enableval], |
282 | []) | |
86cfe82d UD |
283 | dnl Prevent unreasonable values. |
284 | if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then | |
285 | # Better nothing than this. | |
286 | minimum_kernel="" | |
269e369f UD |
287 | else |
288 | if test "$minimum_kernel" = current; then | |
289 | minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel= | |
290 | fi | |
86cfe82d | 291 | fi |
958f238f | 292 | |
6cc7d725 UD |
293 | dnl For the development we sometimes want gcc to issue even more warnings. |
294 | dnl This is not the default since many of the extra warnings are not | |
295 | dnl appropriate. | |
6b7f6183 RM |
296 | AC_ARG_ENABLE([all-warnings], |
297 | AC_HELP_STRING([--enable-all-warnings], | |
77e8bddf | 298 | [enable all useful warnings gcc can issue]), |
6b7f6183 RM |
299 | [all_warnings=$enableval], |
300 | []) | |
6cc7d725 UD |
301 | AC_SUBST(all_warnings) |
302 | ||
a4ecc9eb JM |
303 | AC_ARG_ENABLE([werror], |
304 | AC_HELP_STRING([--disable-werror], | |
305 | [do not build with -Werror]), | |
306 | [enable_werror=$enableval], | |
307 | [enable_werror=yes]) | |
308 | AC_SUBST(enable_werror) | |
309 | ||
425ce2ed UD |
310 | AC_ARG_ENABLE([multi-arch], |
311 | AC_HELP_STRING([--enable-multi-arch], | |
312 | [enable single DSO with optimizations for multiple architectures]), | |
313 | [multi_arch=$enableval], | |
6f89d2f3 | 314 | [multi_arch=default]) |
425ce2ed | 315 | |
ff886b82 UD |
316 | AC_ARG_ENABLE([nss-crypt], |
317 | AC_HELP_STRING([--enable-nss-crypt], | |
318 | [enable libcrypt to use nss]), | |
319 | [nss_crypt=$enableval], | |
320 | [nss_crypt=no]) | |
321 | if test x$nss_crypt = xyes; then | |
322 | nss_includes=-I$(nss-config --includedir 2>/dev/null) | |
323 | if test $? -ne 0; then | |
324 | AC_MSG_ERROR([cannot find include directory with nss-config]) | |
325 | fi | |
326 | old_CFLAGS="$CFLAGS" | |
327 | CFLAGS="$CFLAGS $nss_includes" | |
b68e08db | 328 | AC_COMPILE_IFELSE([AC_LANG_PROGRAM([typedef int PRBool; |
ff886b82 UD |
329 | #include <hasht.h> |
330 | #include <nsslowhash.h> | |
b68e08db | 331 | void f (void) { NSSLOW_Init (); }])], |
ff886b82 UD |
332 | libc_cv_nss_crypt=yes, |
333 | AC_MSG_ERROR([ | |
334 | cannot find NSS headers with lowlevel hash function interfaces])) | |
335 | old_LIBS="$LIBS" | |
84aa7516 | 336 | old_LDFLAGS="$LDFLAGS" |
ff886b82 UD |
337 | LIBS="$LIBS -lfreebl3" |
338 | AC_LINK_IFELSE([AC_LANG_PROGRAM([typedef int PRBool; | |
339 | #include <hasht.h> | |
340 | #include <nsslowhash.h>], | |
341 | [NSSLOW_Init();])], | |
342 | libc_cv_nss_crypt=yes, | |
343 | AC_MSG_ERROR([ | |
344 | cannot link program using lowlevel NSS hash functions])) | |
84aa7516 CD |
345 | # Check to see if there is a static NSS cryptographic library. |
346 | # If there isn't then we can't link anything with libcrypt.a, | |
347 | # and that might mean disabling some static tests. | |
348 | LDFLAGS="$LDFLAGS -static" | |
349 | AC_LINK_IFELSE([AC_LANG_PROGRAM([typedef int PRBool; | |
350 | #include <hasht.h> | |
351 | #include <nsslowhash.h>], | |
352 | [NSSLOW_Init();])], | |
353 | libc_cv_static_nss_crypt=yes, | |
354 | libc_cv_static_nss_crypt=no) | |
355 | LDFLAGS="$old_LDFLAGS" | |
ff886b82 UD |
356 | CFLAGS="$old_CFLAGS" |
357 | LIBS="$old_LIBS" | |
358 | else | |
359 | libc_cv_nss_crypt=no | |
84aa7516 | 360 | libc_cv_static_nss_crypt=no |
ff886b82 UD |
361 | fi |
362 | AC_SUBST(libc_cv_nss_crypt) | |
84aa7516 | 363 | AC_SUBST(libc_cv_static_nss_crypt) |
ff886b82 | 364 | |
3a097cc7 | 365 | |
021db4be AJ |
366 | AC_ARG_ENABLE([obsolete-rpc], |
367 | AC_HELP_STRING([--enable-obsolete-rpc], | |
368 | [build and install the obsolete RPC code for link-time usage]), | |
369 | [link_obsolete_rpc=$enableval], | |
370 | [link_obsolete_rpc=no]) | |
371 | AC_SUBST(link_obsolete_rpc) | |
372 | ||
373 | if test "$link_obsolete_rpc" = yes; then | |
374 | AC_DEFINE(LINK_OBSOLETE_RPC) | |
375 | fi | |
376 | ||
3a097cc7 RM |
377 | AC_ARG_ENABLE([systemtap], |
378 | [AS_HELP_STRING([--enable-systemtap], | |
379 | [enable systemtap static probe points @<:@default=no@:>@])], | |
380 | [systemtap=$enableval], | |
381 | [systemtap=no]) | |
382 | if test "x$systemtap" != xno; then | |
383 | AC_CACHE_CHECK([for systemtap static probe support], libc_cv_sdt, [dnl | |
384 | old_CFLAGS="$CFLAGS" | |
783dd2d3 | 385 | CFLAGS="-std=gnu11 $CFLAGS" |
0e3933b9 | 386 | AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#include <sys/sdt.h> |
3a097cc7 RM |
387 | void foo (int i, void *p) |
388 | { | |
389 | asm ("" STAP_PROBE_ASM (foo, bar, STAP_PROBE_ASM_TEMPLATE (2)) "" | |
390 | :: STAP_PROBE_ASM_OPERANDS (2, i, p)); | |
0e3933b9 | 391 | }]])], [libc_cv_sdt=yes], [libc_cv_sdt=no]) |
3a097cc7 RM |
392 | CFLAGS="$old_CFLAGS"]) |
393 | if test $libc_cv_sdt = yes; then | |
394 | AC_DEFINE([USE_STAP_PROBE]) | |
395 | elif test "x$systemtap" != xauto; then | |
396 | AC_MSG_FAILURE([systemtap support needs sys/sdt.h with asm support]) | |
397 | fi | |
398 | fi | |
399 | ||
c53d909c RM |
400 | AC_ARG_ENABLE([build-nscd], |
401 | [AS_HELP_STRING([--disable-build-nscd], | |
402 | [disable building and installing the nscd daemon])], | |
403 | [build_nscd=$enableval], | |
404 | [build_nscd=default]) | |
405 | AC_SUBST(build_nscd) | |
406 | ||
3cc3ef96 RM |
407 | # Note the use of $use_nscd is near the bottom of the file. |
408 | AC_ARG_ENABLE([nscd], | |
409 | [AS_HELP_STRING([--disable-nscd], | |
410 | [library functions will not contact the nscd daemon])], | |
411 | [use_nscd=$enableval], | |
412 | [use_nscd=yes]) | |
413 | ||
e4608715 CD |
414 | AC_ARG_ENABLE([pt_chown], |
415 | [AS_HELP_STRING([--enable-pt_chown], | |
416 | [Enable building and installing pt_chown])], | |
417 | [build_pt_chown=$enableval], | |
418 | [build_pt_chown=no]) | |
419 | AC_SUBST(build_pt_chown) | |
8c12f01d | 420 | if test "$build_pt_chown" = yes; then |
e4608715 CD |
421 | AC_DEFINE(HAVE_PT_CHOWN) |
422 | fi | |
423 | ||
67e58f39 SP |
424 | AC_ARG_ENABLE([tunables], |
425 | [AS_HELP_STRING([--enable-tunables], | |
6765d5d3 | 426 | [Enable tunables support. Known values are 'yes', 'no' and 'valstring'])], |
67e58f39 SP |
427 | [have_tunables=$enableval], |
428 | [have_tunables=no]) | |
429 | AC_SUBST(have_tunables) | |
430 | if test "$have_tunables" = yes; then | |
431 | AC_DEFINE(HAVE_TUNABLES) | |
432 | fi | |
433 | ||
ebf27d12 ST |
434 | # The abi-tags file uses a fairly simplistic model for name recognition that |
435 | # can't distinguish i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a | |
436 | # $host_os of `gnu*' here to be `gnu-gnu*' just so that it can tell. | |
437 | # This doesn't get used much beyond that, so it's fairly safe. | |
438 | case "$host_os" in | |
439 | linux*) | |
440 | ;; | |
441 | gnu*) | |
442 | host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'` | |
443 | ;; | |
444 | esac | |
445 | ||
5695d46f AS |
446 | AC_ARG_ENABLE([mathvec], |
447 | [AS_HELP_STRING([--enable-mathvec], | |
448 | [Enable building and installing mathvec @<:@default depends on architecture@:>@])], | |
449 | [build_mathvec=$enableval], | |
450 | [build_mathvec=notset]) | |
451 | ||
28f540f4 RM |
452 | # We keep the original values in `$config_*' and never modify them, so we |
453 | # can write them unchanged into config.make. Everything else uses | |
454 | # $machine, $vendor, and $os, and changes them whenever convenient. | |
455 | config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os | |
456 | ||
2f64b655 UD |
457 | # Don't allow vendor == "unknown" |
458 | test "$config_vendor" = unknown && config_vendor= | |
459 | config_os="`echo $config_os | sed 's/^unknown-//'`" | |
460 | ||
a2fe9c76 | 461 | # Some configurations imply other options. |
0269750c | 462 | elf=yes |
a2fe9c76 | 463 | |
8f73811b RM |
464 | # The configure fragment of an add-on port can modify these to supplement |
465 | # or override the table in the case statement below. No fragment should | |
466 | # ever change the config_* variables, however. | |
28f540f4 RM |
467 | machine=$config_machine |
468 | vendor=$config_vendor | |
469 | os=$config_os | |
b22d21b3 | 470 | base_os='' |
28f540f4 | 471 | |
2ceaa76a RM |
472 | submachine= |
473 | AC_ARG_WITH([cpu], | |
474 | AS_HELP_STRING([--with-cpu=CPU], [select code for CPU variant]), | |
475 | [dnl | |
476 | case "$withval" in | |
477 | yes|'') AC_MSG_ERROR([--with-cpu requires an argument]) ;; | |
478 | no) ;; | |
479 | *) submachine="$withval" ;; | |
480 | esac | |
481 | ]) | |
482 | ||
05439291 RM |
483 | # An preconfigure script can set this when it wants to disable the sanity |
484 | # check below. | |
485 | libc_config_ok=no | |
486 | ||
10a803e0 RM |
487 | dnl Let sysdeps/*/preconfigure act here, like they can in add-ons. |
488 | LIBC_PRECONFIGURE([$srcdir], [for sysdeps]) | |
489 | ||
8f73811b RM |
490 | dnl Having this here, though empty, makes sure that if add-ons' fragments |
491 | dnl do AC_CONFIG_SUBDIRS([some-dir]), which just sets $subdirs, then | |
492 | dnl our AC_OUTPUT will actually use it. | |
493 | AC_CONFIG_SUBDIRS() | |
494 | ||
e0a3ed4f RM |
495 | case "$enable_add_ons" in |
496 | ''|no) add_ons= ;; | |
497 | yes|'*') | |
498 | add_ons=`cd $srcdir && ls -d 2> /dev/null */configure */sysdeps | | |
499 | sed 's@/[[^/]]*$@@' | sort | uniq` | |
500 | add_ons_automatic=yes | |
501 | ;; | |
502 | *) add_ons=`echo "$enable_add_ons" | sed 's/,/ /g'` | |
503 | add_ons_automatic=no ;; | |
504 | esac | |
505 | ||
506 | configured_add_ons= | |
8f73811b RM |
507 | add_ons_sfx= |
508 | add_ons_pfx= | |
509 | if test x"$add_ons" != x; then | |
510 | for f in $add_ons; do | |
511 | # Some sanity checks | |
512 | case "$f" in | |
513 | crypt) | |
514 | AC_MSG_ERROR([ | |
515 | *** It seems that you're using an old \`crypt' add-on. crypt is now | |
516 | *** part of glibc and using the old add-on will not work with this | |
517 | *** release. Start again with fresh sources and without the old | |
518 | *** \`crypt' add-on.]) | |
519 | ;; | |
520 | localedata) | |
521 | AC_MSG_ERROR([ | |
522 | *** It seems that you're using an old \`localedata' add-on. localedata | |
523 | *** is now part of glibc and using the old add-on will not work with | |
524 | *** this release. Start again with fresh sources and without the old | |
525 | *** \`localedata' add-on.]) | |
526 | ;; | |
527 | esac | |
8f73811b RM |
528 | done |
529 | ||
9382fcee | 530 | # Now source each add-on's configure fragment. |
c80e931a RM |
531 | # The fragments can use $srcdir/$libc_add_on to find themselves, |
532 | # and test $add_ons_automatic to see if they were explicitly requested. | |
533 | # A fragment can clear (or even change) $libc_add_on to affect | |
534 | # whether it goes into the list to be actually used in the build. | |
535 | use_add_ons= | |
9382fcee | 536 | for libc_add_on in $add_ons; do |
e0a3ed4f RM |
537 | # Test whether such a directory really exists. |
538 | # It can be absolute, or relative to $srcdir, or relative to the build dir. | |
539 | case "$libc_add_on" in | |
540 | /*) | |
541 | libc_add_on_srcdir=$libc_add_on | |
542 | ;; | |
543 | *) | |
544 | test -d "$srcdir/$libc_add_on" || { | |
77e8bddf | 545 | if test -d "$libc_add_on"; then |
e0a3ed4f RM |
546 | libc_add_on="`pwd`/$libc_add_on" |
547 | else | |
548 | AC_MSG_ERROR(add-on directory \"$libc_add_on\" does not exist) | |
549 | fi | |
550 | } | |
551 | libc_add_on_srcdir=$srcdir/$libc_add_on | |
552 | ;; | |
553 | esac | |
554 | ||
555 | libc_add_on_frag=$libc_add_on_srcdir/configure | |
556 | libc_add_on_canonical= | |
7967983f | 557 | libc_add_on_config_subdirs= |
e0a3ed4f RM |
558 | if test -r "$libc_add_on_frag"; then |
559 | AC_MSG_NOTICE(running configure fragment for add-on $libc_add_on) | |
560 | libc_add_on_canonical=unknown | |
561 | libc_add_on_subdirs= | |
562 | . "$libc_add_on_frag" | |
563 | test -z "$libc_add_on" || { | |
77e8bddf | 564 | configured_add_ons="$configured_add_ons $libc_add_on" |
e0a3ed4f RM |
565 | if test "x$libc_add_on_canonical" = xunknown; then |
566 | AC_MSG_ERROR(fragment must set \$libc_add_on_canonical) | |
567 | fi | |
568 | for d in $libc_add_on_subdirs; do | |
569 | case "$libc_add_on" in | |
570 | /*) subdir_srcdir="$libc_add_on" ;; | |
571 | *) subdir_srcdir="\$(..)$libc_add_on" ;; | |
572 | esac | |
573 | case "$d" in | |
574 | .) | |
575 | d="${libc_add_on_canonical:-$libc_add_on}" | |
576 | ;; | |
577 | /*) | |
578 | subdir_srcdir="$d" | |
579 | ;; | |
580 | *) | |
581 | subdir_srcdir="$subdir_srcdir/$d" | |
582 | ;; | |
583 | esac | |
584 | d=`echo "$d" | sed 's@/*$@@;s@^.*/@@'` | |
585 | add_on_subdirs="$add_on_subdirs $d" | |
586 | test "$subdir_srcdir" = "\$(..)$d" || config_vars="$config_vars | |
587 | $d-srcdir = $subdir_srcdir" | |
588 | done | |
7967983f RM |
589 | for d in $libc_add_on_config_subdirs; do |
590 | case "$d" in | |
591 | /*) AC_MSG_ERROR(dnl | |
592 | fragment uses absolute path in \$libc_add_on_config_subdirs) ;; | |
593 | esac | |
594 | if test ! -d "$libc_add_on_srcdir/$d"; then | |
595 | AC_MSG_ERROR(fragment wants to configure missing directory $d) | |
596 | fi | |
597 | case "$libc_add_on" in | |
598 | /*) AC_MSG_ERROR(dnl | |
599 | relative path required for add-on using \$libc_add_on_config_subdirs) ;; | |
600 | esac | |
601 | subdirs="$subdirs $libc_add_on/$d" | |
602 | done | |
e0a3ed4f | 603 | } |
8f73811b | 604 | fi |
619f9448 | 605 | if test -n "$libc_add_on"; then |
10a803e0 | 606 | LIBC_PRECONFIGURE([$libc_add_on_srcdir], [add-on $libc_add_on for]) |
619f9448 RM |
607 | use_add_ons="$use_add_ons $libc_add_on" |
608 | add_ons_pfx="$add_ons_pfx $libc_add_on/" | |
e0a3ed4f RM |
609 | test -z "$libc_add_on_canonical" || |
610 | add_ons_sfx="$add_ons_sfx /$libc_add_on_canonical" | |
619f9448 | 611 | fi |
8f73811b | 612 | done |
c80e931a RM |
613 | # Use echo to strip excess whitespace. |
614 | add_ons="`echo $use_add_ons`" | |
8f73811b RM |
615 | fi |
616 | AC_SUBST(add_ons) | |
e0a3ed4f | 617 | AC_SUBST(add_on_subdirs) |
8f73811b RM |
618 | |
619 | ||
bdc8eb03 UD |
620 | ### |
621 | ### By using the undocumented --enable-hacker-mode option for configure | |
622 | ### one can skip this test to make the configuration not fail for unsupported | |
623 | ### platforms. | |
624 | ### | |
8f73811b | 625 | if test -z "$enable_hacker_mode" && test x"$libc_config_ok" != xyes; then |
bdc8eb03 | 626 | case "$machine-$host_os" in |
2ce4f015 | 627 | *-linux* | *-gnu*) |
bdc8eb03 UD |
628 | ;; |
629 | *) | |
4e58b648 MF |
630 | AC_MSG_ERROR([ |
631 | *** The GNU C library is currently unavailable for this platform. | |
632 | *** If you are interested in seeing glibc on this platform visit | |
633 | *** the "How to submit a new port" in the wiki: | |
634 | *** https://sourceware.org/glibc/wiki/#Development | |
635 | *** and join the community!]) | |
bdc8eb03 UD |
636 | ;; |
637 | esac | |
638 | fi | |
639 | ||
3e239be6 JM |
640 | # Set base_machine if not set by a preconfigure fragment. |
641 | test -n "$base_machine" || base_machine=$machine | |
f0523145 | 642 | AC_SUBST(base_machine) |
28f540f4 | 643 | |
03baef1c NA |
644 | AC_CACHE_CHECK(for -fstack-protector, libc_cv_ssp, [dnl |
645 | LIBC_TRY_CC_OPTION([$CFLAGS $CPPFLAGS -Werror -fstack-protector], | |
646 | [libc_cv_ssp=yes], | |
647 | [libc_cv_ssp=no]) | |
648 | ]) | |
649 | ||
650 | AC_CACHE_CHECK(for -fstack-protector-strong, libc_cv_ssp_strong, [dnl | |
651 | LIBC_TRY_CC_OPTION([$CFLAGS $CPPFLAGS -Werror -fstack-protector-strong], | |
652 | [libc_cv_ssp_strong=yes], | |
653 | [libc_cv_ssp_strong=no]) | |
654 | ]) | |
655 | ||
656 | AC_CACHE_CHECK(for -fstack-protector-all, libc_cv_ssp_all, [dnl | |
657 | LIBC_TRY_CC_OPTION([$CFLAGS $CPPFLAGS -Werror -fstack-protector-all], | |
658 | [libc_cv_ssp_all=yes], | |
659 | [libc_cv_ssp_all=no]) | |
660 | ]) | |
661 | ||
662 | stack_protector= | |
663 | no_stack_protector= | |
664 | if test "$libc_cv_ssp" = yes; then | |
665 | no_stack_protector="-fno-stack-protector -DSTACK_PROTECTOR_LEVEL=0" | |
de659123 | 666 | AC_DEFINE(HAVE_CC_NO_STACK_PROTECTOR) |
03baef1c NA |
667 | fi |
668 | ||
669 | if test "$enable_stack_protector" = yes && test "$libc_cv_ssp" = yes; then | |
670 | stack_protector="-fstack-protector" | |
671 | AC_DEFINE(STACK_PROTECTOR_LEVEL, 1) | |
672 | elif test "$enable_stack_protector" = all && test "$libc_cv_ssp_all" = yes; then | |
673 | stack_protector="-fstack-protector-all" | |
674 | AC_DEFINE(STACK_PROTECTOR_LEVEL, 2) | |
675 | elif test "$enable_stack_protector" = strong && test "$libc_cv_ssp_strong" = yes; then | |
676 | stack_protector="-fstack-protector-strong" | |
677 | AC_DEFINE(STACK_PROTECTOR_LEVEL, 3) | |
66a704c4 NA |
678 | else |
679 | stack_protector="-fno-stack-protector" | |
680 | AC_DEFINE(STACK_PROTECTOR_LEVEL, 0) | |
03baef1c NA |
681 | fi |
682 | AC_SUBST(libc_cv_ssp) | |
683 | AC_SUBST(stack_protector) | |
684 | AC_SUBST(no_stack_protector) | |
685 | ||
66a704c4 NA |
686 | if test -n "$stack_protector"; then |
687 | dnl Don't run configure tests with stack-protection on, to avoid problems with | |
688 | dnl bootstrapping. | |
689 | no_ssp=-fno-stack-protector | |
690 | else | |
691 | no_ssp= | |
692 | ||
693 | if test "$enable_stack_protector" != no; then | |
694 | AC_MSG_ERROR([--enable-stack-protector=$enable_stack_protector specified, but specified level of stack protection is not supported by the compiler.]) | |
695 | fi | |
696 | fi | |
697 | ||
0cae3f4b MF |
698 | # For the multi-arch option we need support in the assembler & linker. |
699 | AC_CACHE_CHECK([for assembler and linker STT_GNU_IFUNC support], | |
700 | libc_cv_ld_gnu_indirect_function, [dnl | |
786b0b67 | 701 | cat > conftest.S <<EOF |
84b9230c | 702 | .type foo,%gnu_indirect_function |
0cae3f4b MF |
703 | foo: |
704 | .globl _start | |
705 | _start: | |
706 | .globl __start | |
707 | __start: | |
708 | .data | |
786b0b67 AS |
709 | #ifdef _LP64 |
710 | .quad foo | |
711 | #else | |
0cae3f4b | 712 | .long foo |
786b0b67 | 713 | #endif |
84b9230c | 714 | EOF |
0cae3f4b MF |
715 | libc_cv_ld_gnu_indirect_function=no |
716 | if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \ | |
66a704c4 | 717 | -nostartfiles -nostdlib $no_ssp \ |
786b0b67 | 718 | -o conftest conftest.S 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then |
0cae3f4b MF |
719 | # Do a link to see if the backend supports IFUNC relocs. |
720 | $READELF -r conftest 1>&AS_MESSAGE_LOG_FD | |
721 | LC_ALL=C $READELF -r conftest | grep 'no relocations' >/dev/null || { | |
722 | libc_cv_ld_gnu_indirect_function=yes | |
723 | } | |
84b9230c MF |
724 | fi |
725 | rm -f conftest*]) | |
726 | ||
022dfdce SL |
727 | # Check if gcc supports attribute ifunc as it is used in libc_ifunc macro. |
728 | AC_CACHE_CHECK([for gcc attribute ifunc support], | |
729 | libc_cv_gcc_indirect_function, [dnl | |
730 | cat > conftest.c <<EOF | |
731 | extern int func (int); | |
732 | int used_func (int a) | |
733 | { | |
734 | return a; | |
735 | } | |
736 | static void *resolver () | |
737 | { | |
738 | return &used_func; | |
739 | } | |
740 | extern __typeof (func) func __attribute__ ((ifunc ("resolver"))); | |
741 | EOF | |
742 | libc_cv_gcc_indirect_function=no | |
743 | if ${CC-cc} -c conftest.c -o conftest.o 1>&AS_MESSAGE_LOG_FD \ | |
744 | 2>&AS_MESSAGE_LOG_FD ; then | |
745 | if $READELF -s conftest.o | grep IFUNC >/dev/null 2>&AS_MESSAGE_LOG_FD; then | |
746 | libc_cv_gcc_indirect_function=yes | |
747 | fi | |
748 | fi | |
749 | rm -f conftest*]) | |
750 | ||
0cae3f4b | 751 | if test x"$libc_cv_ld_gnu_indirect_function" != xyes; then |
84b9230c MF |
752 | if test x"$multi_arch" = xyes; then |
753 | AC_MSG_ERROR([--enable-multi-arch support requires assembler and linker support]) | |
754 | else | |
755 | multi_arch=no | |
756 | fi | |
757 | fi | |
022dfdce SL |
758 | if test x"$libc_cv_gcc_indirect_function" != xyes && |
759 | test x"$multi_arch" = xyes; then | |
760 | AC_MSG_WARN([--enable-multi-arch support recommends a gcc with gnu-indirect-function support. | |
761 | Please use a gcc which supports it by default or configure gcc with --enable-gnu-indirect-function]) | |
762 | fi | |
6270516e | 763 | multi_arch_d= |
84b9230c MF |
764 | if test x"$multi_arch" != xno; then |
765 | multi_arch_d=/multiarch | |
766 | fi | |
767 | ||
f0523145 | 768 | # Compute the list of sysdep directories for this configuration. |
f332db02 | 769 | # This can take a while to compute. |
f0523145 | 770 | sysdep_dir=$srcdir/sysdeps |
f332db02 | 771 | AC_MSG_CHECKING(sysdep dirs) |
f0523145 RM |
772 | dnl We need to use [ and ] for other purposes for a while now. |
773 | changequote(,)dnl | |
28f540f4 RM |
774 | # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1. |
775 | os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`" | |
776 | ||
b22d21b3 | 777 | test "x$base_os" != x || case "$os" in |
28f540f4 RM |
778 | gnu*) |
779 | base_os=mach/hurd ;; | |
2ce4f015 | 780 | linux*) |
28f540f4 | 781 | base_os=unix/sysv ;; |
28f540f4 RM |
782 | esac |
783 | ||
784 | # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos. | |
785 | tail=$os | |
786 | ostry=$os | |
787 | while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do | |
788 | ostry="$ostry /$o" | |
789 | tail=$o | |
75914335 | 790 | done |
28f540f4 RM |
791 | o=`echo $tail | sed 's/[0-9]*$//'` |
792 | if test $o != $tail; then | |
793 | ostry="$ostry /$o" | |
794 | fi | |
ec4b0518 UD |
795 | # For linux-gnu, try linux-gnu, then linux. |
796 | o=`echo $tail | sed 's/-.*$//'` | |
797 | if test $o != $tail; then | |
798 | ostry="$ostry /$o" | |
799 | fi | |
28f540f4 RM |
800 | |
801 | # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix. | |
802 | base= | |
803 | tail=$base_os | |
804 | while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do | |
805 | set $b | |
806 | base="$base /$1" | |
807 | tail="$2" | |
808 | done | |
809 | ||
ae6b8730 | 810 | # For sparc/sparc32, try sparc/sparc32 and then sparc. |
28f540f4 | 811 | mach= |
2ceaa76a | 812 | tail=$machine${submachine:+/$submachine} |
28f540f4 RM |
813 | while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do |
814 | set $m | |
10ceac89 RM |
815 | # Prepend the machine's FPU directory unless --without-fp. |
816 | if test "$with_fp" = yes; then | |
6270516e | 817 | maybe_fpu=/fpu |
f4b07664 | 818 | else |
6270516e | 819 | maybe_fpu=/nofpu |
82d00cab | 820 | fi |
6270516e RM |
821 | # For each machine term, try it with and then without /multiarch. |
822 | for try_fpu in $maybe_fpu ''; do | |
823 | for try_multi in $multi_arch_d ''; do | |
824 | mach="$mach /$1$try_fpu$try_multi" | |
825 | done | |
826 | done | |
28f540f4 RM |
827 | tail="$2" |
828 | done | |
829 | ||
830 | dnl We are done with glob and regexp uses of [ and ]; return to autoconf. | |
831 | changequote([,])dnl | |
832 | ||
833 | # Find what sysdep directories exist. | |
e0a3ed4f | 834 | sysnames_add_ons= |
28f540f4 | 835 | sysnames= |
4b69abad RM |
836 | for b in $base ''; do |
837 | for m0 in $mach ''; do | |
838 | for v in /$vendor ''; do | |
839 | test "$v" = / && continue | |
840 | for o in /$ostry ''; do | |
841 | test "$o" = / && continue | |
6270516e | 842 | for m in $mach ''; do |
4b69abad | 843 | for d in $add_ons_pfx ''; do |
8f73811b | 844 | for a in $add_ons_sfx ''; do |
1c9f1a02 RM |
845 | try_suffix="$m0$b$v$o$m" |
846 | if test -n "$try_suffix"; then | |
77e8bddf AS |
847 | try_srcdir="${srcdir}/" |
848 | case "$d" in | |
e0a3ed4f RM |
849 | /*) try_srcdir= ;; |
850 | esac | |
1c9f1a02 | 851 | try="${d}sysdeps$try_suffix$a" |
8f73811b RM |
852 | test -n "$enable_debug_configure" && |
853 | echo "$0 [DEBUG]: try $try" >&2 | |
e0a3ed4f | 854 | if test -d "$try_srcdir$try"; then |
8f73811b RM |
855 | sysnames="$sysnames $try" |
856 | { test -n "$o" || test -n "$b"; } && os_used=t | |
857 | { test -n "$m" || test -n "$m0"; } && machine_used=t | |
4b69abad RM |
858 | case x${m0:-$m} in |
859 | x*/$submachine) submachine_used=t ;; | |
860 | esac | |
e0a3ed4f RM |
861 | if test -n "$d"; then |
862 | case "$sysnames_add_ons" in | |
863 | *" $d "*) ;; | |
864 | *|'') sysnames_add_ons="$sysnames_add_ons $d" ;; | |
865 | esac | |
866 | fi | |
8f73811b | 867 | fi |
57ba7bb4 | 868 | fi |
8f73811b | 869 | done |
57ba7bb4 | 870 | done |
28f540f4 RM |
871 | done |
872 | done | |
873 | done | |
874 | done | |
4b69abad | 875 | done |
28f540f4 | 876 | |
6f89d2f3 L |
877 | # If the assembler supports gnu_indirect_function symbol type and the |
878 | # architecture supports multi-arch, we enable multi-arch by default. | |
84b9230c MF |
879 | case $sysnames_add_ons$sysnames in |
880 | *"$multi_arch_d"*) | |
881 | ;; | |
882 | *) | |
77e8bddf | 883 | test x"$multi_arch" = xdefault && multi_arch=no |
84b9230c MF |
884 | ;; |
885 | esac | |
886 | if test x"$multi_arch" != xno; then | |
6f89d2f3 L |
887 | AC_DEFINE(USE_MULTIARCH) |
888 | fi | |
889 | AC_SUBST(multi_arch) | |
890 | ||
28f540f4 RM |
891 | if test -z "$os_used" && test "$os" != none; then |
892 | AC_MSG_ERROR(Operating system $os is not supported.) | |
893 | fi | |
894 | if test -z "$machine_used" && test "$machine" != none; then | |
895 | AC_MSG_ERROR(The $machine is not supported.) | |
896 | fi | |
2ceaa76a RM |
897 | if test -z "$submachine_used" && test -n "$submachine"; then |
898 | AC_MSG_ERROR(The $submachine subspecies of $host_cpu is not supported.) | |
899 | fi | |
900 | AC_SUBST(submachine) | |
28f540f4 RM |
901 | |
902 | # We have now validated the configuration. | |
903 | ||
28f540f4 RM |
904 | # Expand the list of system names into a full list of directories |
905 | # from each element's parent name and Implies file (if present). | |
906 | set $sysnames | |
e50ec9f9 | 907 | names= |
28f540f4 RM |
908 | while test $# -gt 0; do |
909 | name=$1 | |
910 | shift | |
911 | ||
e50ec9f9 | 912 | case " $names " in *" $name "*) |
f332db02 RM |
913 | # Already in the list. |
914 | continue | |
e50ec9f9 | 915 | esac |
f332db02 RM |
916 | |
917 | # Report each name as we discover it, so there is no long pause in output. | |
0b4ee387 | 918 | echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD |
f332db02 | 919 | |
57ba7bb4 UD |
920 | name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'` |
921 | ||
922 | case $name in | |
923 | /*) xsrcdir= ;; | |
924 | *) xsrcdir=$srcdir/ ;; | |
925 | esac | |
926 | test -n "$enable_debug_configure" && | |
927 | echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2 | |
928 | ||
ba75122d RM |
929 | for implies_file in Implies Implies-before Implies-after; do |
930 | implies_type=`echo $implies_file | sed s/-/_/` | |
931 | eval ${implies_type}= | |
932 | if test -f $xsrcdir$name/$implies_file; then | |
933 | # Collect more names from the `Implies' file (removing comments). | |
934 | implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/$implies_file`" | |
935 | for x in $implied_candidate; do | |
936 | found=no | |
937 | if test -d $xsrcdir$name_base/$x; then | |
938 | eval "${implies_type}=\"\$${implies_type} \$name_base/\$x\"" | |
636ccfc8 | 939 | found=yes |
ba75122d RM |
940 | fi |
941 | for d in $add_ons_pfx ''; do | |
942 | try="${d}sysdeps/$x" | |
943 | case $d in | |
944 | /*) try_srcdir= ;; | |
945 | *) try_srcdir=$srcdir/ ;; | |
e0a3ed4f | 946 | esac |
ba75122d RM |
947 | test -n "$enable_debug_configure" && |
948 | echo "[DEBUG]: $name $implies_file $x try($d) {$try_srcdir}$try" >&2 | |
949 | if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try; | |
950 | then | |
951 | eval "${implies_type}=\"\$${implies_type} \$try\"" | |
952 | found=yes | |
953 | case "$sysnames_add_ons" in | |
954 | *" $d "*) ;; | |
955 | *|'') sysnames_add_ons="$sysnames_add_ons $d" ;; | |
956 | esac | |
957 | fi | |
958 | done | |
959 | if test $found = no; then | |
960 | AC_MSG_WARN($name/$implies_file specifies nonexistent $x) | |
636ccfc8 UD |
961 | fi |
962 | done | |
ba75122d RM |
963 | fi |
964 | done | |
28f540f4 RM |
965 | |
966 | # Add NAME to the list of names. | |
967 | names="$names $name" | |
968 | ||
969 | # Find the parent of NAME, using the empty string if it has none. | |
970 | changequote(,)dnl | |
57ba7bb4 | 971 | parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`" |
28f540f4 RM |
972 | changequote([,])dnl |
973 | ||
ba75122d RM |
974 | test -n "$enable_debug_configure" && |
975 | echo "[DEBUG]: $name Implies='$Implies' rest='$*' parent='$parent' \ | |
57633811 | 976 | Implies_before='$Implies_before' Implies_after='$Implies_after'" >&2 |
ba75122d | 977 | |
28f540f4 RM |
978 | # Add the names implied by NAME, and NAME's parent (if it has one), to |
979 | # the list of names to be processed (the argument list). We prepend the | |
980 | # implied names to the list and append the parent. We want implied | |
981 | # directories to come before further directories inferred from the | |
982 | # configuration components; this ensures that for sysv4, unix/common | |
983 | # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*) | |
984 | # after sysv4). | |
ba75122d | 985 | sysnames="`echo $Implies $* $Implies_before $parent $Implies_after`" |
28f540f4 RM |
986 | test -n "$sysnames" && set $sysnames |
987 | done | |
988 | ||
989 | # Add the default directories. | |
83ef87ba | 990 | default_sysnames="sysdeps/generic" |
ecdc196c | 991 | sysnames="$names $default_sysnames" |
f332db02 RM |
992 | AC_SUBST(sysnames) |
993 | # The other names were emitted during the scan. | |
ecdc196c | 994 | AC_MSG_RESULT($default_sysnames) |
28f540f4 | 995 | |
e0a3ed4f RM |
996 | # Collect the list of add-ons that supply partial sysdeps trees. |
997 | sysdeps_add_ons= | |
998 | for add_on in $add_ons; do | |
999 | case "$add_on" in | |
1000 | /*) xsrcdir= ;; | |
1001 | *) xsrcdir="$srcdir/" ;; | |
1002 | esac | |
1003 | ||
1004 | test -d "$xsrcdir$add_on/sysdeps" || { | |
1005 | case "$configured_add_ons " in | |
1006 | *" $add_on "*) ;; | |
1007 | *|'') | |
1008 | AC_MSG_ERROR(add-on $add_on has no configure fragment or sysdeps tree) | |
1009 | ;; | |
1010 | esac | |
1011 | continue | |
1012 | } | |
1013 | ||
1014 | sysdeps_add_ons="$sysdeps_add_ons $add_on" | |
1015 | case "$sysnames_add_ons" in | |
1016 | *" $add_on/ "*) ;; | |
1017 | *|'') | |
1018 | AC_MSG_WARN(add-on $add_on contributed no sysdeps directories) | |
1019 | continue ;; | |
1020 | esac | |
1021 | ||
1022 | found=no | |
1023 | for d in $sysnames; do | |
1024 | case "$d" in | |
1025 | $add_on/sysdeps/*) ;; | |
1026 | *) continue ;; | |
1027 | esac | |
1028 | (cd "$xsrcdir$d" && for f in *[[!~]]; do | |
1029 | case "$f" in | |
1030 | sys|bits) | |
1031 | for ff in $f/*.h; do | |
1032 | test -d "$ff" || { test -e "$ff" && exit 88; } | |
1033 | done | |
1034 | ;; | |
1035 | *) | |
77e8bddf | 1036 | test -d "$f" || { test -e "$f" && exit 88; } |
e0a3ed4f RM |
1037 | ;; |
1038 | esac | |
1039 | done) | |
1040 | if test $? -eq 88; then | |
1041 | found=yes | |
1042 | break | |
1043 | fi | |
1044 | done | |
1045 | if test $found = no; then | |
1046 | AC_MSG_WARN(add-on $add_on contributed no useful sysdeps directories) | |
1047 | fi | |
1048 | done | |
1049 | AC_SUBST(sysdeps_add_ons) | |
1050 | ||
f332db02 RM |
1051 | |
1052 | ### Locate tools. | |
28f540f4 | 1053 | |
28f540f4 | 1054 | AC_PROG_INSTALL |
2b80a372 | 1055 | if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then |
28f540f4 | 1056 | # The makefiles need to use a different form to find it in $srcdir. |
2b80a372 | 1057 | INSTALL='\$(..)./scripts/install-sh -c' |
28f540f4 | 1058 | fi |
0e3426bb | 1059 | AC_PROG_LN_S |
ae828bc6 | 1060 | |
4baa087a | 1061 | LIBC_PROG_BINUTILS |
4baa087a | 1062 | |
bd805071 | 1063 | # Accept binutils 2.22 or newer. |
4baa087a RM |
1064 | AC_CHECK_PROG_VER(AS, $AS, --version, |
1065 | [GNU assembler.* \([0-9]*\.[0-9.]*\)], | |
bd805071 AS |
1066 | [2.1[0-9][0-9]*|2.2[2-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*], |
1067 | AS=: critic_missing="$critic_missing as") | |
4baa087a RM |
1068 | AC_CHECK_PROG_VER(LD, $LD, --version, |
1069 | [GNU ld.* \([0-9][0-9]*\.[0-9.]*\)], | |
bd805071 AS |
1070 | [2.1[0-9][0-9]*|2.2[2-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*], |
1071 | LD=: critic_missing="$critic_missing ld") | |
4baa087a | 1072 | |
63bda0c1 | 1073 | # These programs are version sensitive. |
3a12e572 | 1074 | AC_CHECK_TOOL_PREFIX |
22e65f8f | 1075 | AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version, |
8fc1e2ca | 1076 | [GNU Make[^0-9]*\([0-9][0-9.]*\)], |
28d708c4 | 1077 | [3.79* | 3.[89]* | [4-9].* | [1-9][0-9]*], critic_missing="$critic_missing make") |
63bda0c1 | 1078 | |
22e65f8f | 1079 | AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version, |
bdd421cc | 1080 | [GNU gettext.* \([0-9]*\.[0-9.]*\)], |
aefdff34 RM |
1081 | [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*], |
1082 | MSGFMT=: aux_missing="$aux_missing msgfmt") | |
63bda0c1 | 1083 | AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version, |
8b7fb588 | 1084 | [GNU texinfo.* \([0-9][0-9.]*\)], |
3a12c70f | 1085 | [4.[7-9]*|4.[1-9][0-9]*|[5-9].*], |
aefdff34 | 1086 | MAKEINFO=: aux_missing="$aux_missing makeinfo") |
d6a97a28 | 1087 | AC_CHECK_PROG_VER(SED, sed, --version, |
07e51550 | 1088 | [GNU sed[^0-9]* \([0-9]*\.[0-9.]*\)], |
aefdff34 RM |
1089 | [3.0[2-9]*|3.[1-9]*|[4-9]*], |
1090 | SED=: aux_missing="$aux_missing sed") | |
0786794f AM |
1091 | AC_CHECK_PROG_VER(AWK, gawk, --version, |
1092 | [GNU Awk[^0-9]*\([0-9][0-9.]*\)], | |
12086fb4 | 1093 | [3.1.[2-9]*|3.[2-9]*|[4-9]*], critic_missing="$critic_missing gawk") |
63bda0c1 | 1094 | |
461a7b1e RM |
1095 | AC_CACHE_CHECK([if $CC is sufficient to build libc], libc_cv_compiler_ok, [ |
1096 | AC_TRY_COMPILE([], [ | |
b08b4218 | 1097 | #if !defined __GNUC__ || __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 7) |
461a7b1e RM |
1098 | #error insufficient compiler |
1099 | #endif], | |
1100 | [libc_cv_compiler_ok=yes], | |
1101 | [libc_cv_compiler_ok=no])]) | |
1102 | AS_IF([test $libc_cv_compiler_ok != yes], | |
1103 | [critic_missing="$critic_missing compiler"]) | |
1104 | ||
30b99d79 | 1105 | AC_CHECK_TOOL(NM, nm, false) |
d30cf5bb | 1106 | |
8894bad3 AM |
1107 | if test "x$maintainer" = "xyes"; then |
1108 | AC_CHECK_PROGS(AUTOCONF, autoconf, no) | |
1109 | case "x$AUTOCONF" in | |
1110 | xno|x|x:) AUTOCONF=no ;; | |
1111 | *) | |
1112 | AC_CACHE_CHECK(dnl | |
1113 | whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl | |
1114 | if (cd $srcdir; $AUTOCONF $ACFLAGS configure.ac > /dev/null 2>&1); then | |
1115 | libc_cv_autoconf_works=yes | |
1116 | else | |
1117 | libc_cv_autoconf_works=no | |
1118 | fi]) | |
1119 | test $libc_cv_autoconf_works = yes || AUTOCONF=no | |
1120 | ;; | |
1121 | esac | |
1122 | if test "x$AUTOCONF" = xno; then | |
1123 | aux_missing="$aux_missing autoconf" | |
1124 | fi | |
9e8ac24b AM |
1125 | else |
1126 | AUTOCONF=no | |
14519931 | 1127 | fi |
1400de2e | 1128 | |
8ce8299f SP |
1129 | # Check for python3 if available, or else python. |
1130 | AC_CHECK_PROGS(PYTHON_PROG, python3 python,no) | |
1131 | case "x$PYTHON_PROG" in | |
1132 | xno|x|x:) PYTHON_PROG=no ;; | |
1133 | *) ;; | |
1134 | esac | |
1135 | ||
1136 | if test "x$PYTHON_PROG" = xno; then | |
1137 | aux_missing="$aux_missing python" | |
1138 | else | |
1139 | PYTHON="$PYTHON_PROG -B" | |
1140 | AC_SUBST(PYTHON) | |
1141 | fi | |
1142 | ||
32a448ed RM |
1143 | test -n "$critic_missing" && AC_MSG_ERROR([ |
1144 | *** These critical programs are missing or too old:$critic_missing | |
1145 | *** Check the INSTALL file for required versions.]) | |
1146 | ||
4bca4c17 | 1147 | test -n "$aux_missing" && AC_MSG_WARN([ |
9c6fffc0 | 1148 | *** These auxiliary programs are missing or incompatible versions:$aux_missing |
8ce8299f | 1149 | *** some features or tests will be disabled. |
63bda0c1 | 1150 | *** Check the INSTALL file for required versions.]) |
28f540f4 | 1151 | |
dbe7a0f5 UD |
1152 | # if using special system headers, find out the compiler's sekrit |
1153 | # header directory and add that to the list. NOTE: Only does the right | |
1154 | # thing on a system that doesn't need fixincludes. (Not presently a problem.) | |
1155 | if test -n "$sysheaders"; then | |
67fbfa5c RM |
1156 | SYSINCLUDES=-nostdinc |
1157 | for d in include include-fixed; do | |
1158 | i=`$CC -print-file-name="$d"` && test "x$i" != x && test "x$i" != "x$d" && | |
1159 | SYSINCLUDES="$SYSINCLUDES -isystem $i" | |
1160 | done | |
1161 | SYSINCLUDES="$SYSINCLUDES \ | |
3d6ce23a | 1162 | -isystem `echo $sysheaders | sed 's/:/ -isystem /g'`" |
ef226fec | 1163 | if test -n "$CXX"; then |
7872cfb0 | 1164 | CXX_SYSINCLUDES= |
67060746 AC |
1165 | for cxxheaders in `$CXX -v -S -x c++ /dev/null -o /dev/null 2>&1 \ |
1166 | | sed -n -e '1,/#include/d' -e 's/^ \(\/.*\/[cg]++\)/\1/p'`; do | |
1167 | test "x$cxxheaders" != x && | |
1168 | CXX_SYSINCLUDES="$CXX_SYSINCLUDES -isystem $cxxheaders" | |
1169 | done | |
ef226fec | 1170 | fi |
dbe7a0f5 UD |
1171 | fi |
1172 | AC_SUBST(SYSINCLUDES) | |
ef226fec | 1173 | AC_SUBST(CXX_SYSINCLUDES) |
dbe7a0f5 | 1174 | |
fc3e1337 FW |
1175 | # Obtain some C++ header file paths. This is used to make a local |
1176 | # copy of those headers in Makerules. | |
1177 | if test -n "$CXX"; then | |
1178 | find_cxx_header () { | |
1179 | echo "#include <$1>" | $CXX -M -MP -x c++ - | sed -n "/$1:/{s/:\$//;p}" | |
1180 | } | |
1181 | CXX_CSTDLIB_HEADER="$(find_cxx_header cstdlib)" | |
1182 | CXX_CMATH_HEADER="$(find_cxx_header cmath)" | |
1183 | fi | |
1184 | AC_SUBST(CXX_CSTDLIB_HEADER) | |
1185 | AC_SUBST(CXX_CMATH_HEADER) | |
1186 | ||
3911660e UD |
1187 | # Test if LD_LIBRARY_PATH contains the notation for the current directory |
1188 | # since this would lead to problems installing/building glibc. | |
1189 | # LD_LIBRARY_PATH contains the current directory if one of the following | |
1190 | # is true: | |
1191 | # - one of the terminals (":" and ";") is the first or last sign | |
1192 | # - two terminals occur directly after each other | |
1193 | # - the path contains an element with a dot in it | |
1194 | AC_MSG_CHECKING(LD_LIBRARY_PATH variable) | |
1195 | changequote(,)dnl | |
1196 | case ${LD_LIBRARY_PATH} in | |
1197 | [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* ) | |
b3a86ae1 | 1198 | ld_library_path_setting="contains current directory" |
3911660e UD |
1199 | ;; |
1200 | *) | |
1201 | ld_library_path_setting="ok" | |
1202 | ;; | |
1203 | esac | |
1204 | changequote([,])dnl | |
1205 | AC_MSG_RESULT($ld_library_path_setting) | |
1206 | if test "$ld_library_path_setting" != "ok"; then | |
63bda0c1 UD |
1207 | AC_MSG_ERROR([ |
1208 | *** LD_LIBRARY_PATH shouldn't contain the current directory when | |
1209 | *** building glibc. Please change the environment variable | |
1210 | *** and run configure again.]) | |
3911660e | 1211 | fi |
8e31cf7e | 1212 | |
26f56c1c | 1213 | AC_PATH_PROG(BASH_SHELL, bash, no) |
84384f5b | 1214 | |
c0016081 | 1215 | AC_PATH_PROG(PERL, perl, no) |
2fd5d029 RM |
1216 | if test "$PERL" != no && |
1217 | (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then | |
1218 | PERL=no | |
ecb06196 | 1219 | fi |
2f512715 AS |
1220 | AC_PATH_PROG(INSTALL_INFO, install-info, no, |
1221 | $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin) | |
cc8623f1 WN |
1222 | AC_CHECK_PROG_VER(BISON, bison, --version, |
1223 | [bison (GNU Bison) \([0-9]*\.[0-9.]*\)], | |
1224 | [2.7*|[3-9].*|[1-9][0-9]*], | |
1225 | BISON=no) | |
2de00372 | 1226 | |
b8dc6a10 | 1227 | AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl |
9a70fcab | 1228 | cat > conftest.s <<EOF |
8c0c01db | 1229 | .text |
ae1025be | 1230 | foo: |
df2a0c93 | 1231 | .set glibc_conftest_frobozz,foo |
7b8e0d49 | 1232 | .globl glibc_conftest_frobozz |
e215c478 | 1233 | EOF |
df2a0c93 RM |
1234 | # The alpha-dec-osf1 assembler gives only a warning for `.set' |
1235 | # (but it doesn't work), so we must do a linking check to be sure. | |
1236 | cat > conftest1.c <<\EOF | |
1237 | extern int glibc_conftest_frobozz; | |
640f0119 | 1238 | void _start() { glibc_conftest_frobozz = 1; } |
df2a0c93 RM |
1239 | EOF |
1240 | if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \ | |
66a704c4 | 1241 | -nostartfiles -nostdlib $no_ssp \ |
0b4ee387 | 1242 | -o conftest conftest.s conftest1.c 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then |
e215c478 RM |
1243 | libc_cv_asm_set_directive=yes |
1244 | else | |
1245 | libc_cv_asm_set_directive=no | |
1246 | fi | |
65b3cbcb | 1247 | rm -f conftest*]) |
e215c478 RM |
1248 | if test $libc_cv_asm_set_directive = yes; then |
1249 | AC_DEFINE(HAVE_ASM_SET_DIRECTIVE) | |
1250 | fi | |
1251 | ||
2a723ff6 JM |
1252 | AC_CACHE_CHECK(linker support for protected data symbol, |
1253 | libc_cv_protected_data, | |
1254 | [cat > conftest.c <<EOF | |
1255 | int bar __attribute__ ((visibility ("protected"))) = 1; | |
83569fb8 | 1256 | EOF |
2a723ff6 | 1257 | libc_cv_protected_data=no |
66a704c4 | 1258 | if AC_TRY_COMMAND(${CC-cc} -nostdlib -nostartfiles $no_ssp -fPIC -shared conftest.c -o conftest.so); then |
2a723ff6 JM |
1259 | cat > conftest.c <<EOF |
1260 | extern int bar; | |
1261 | int main (void) { return bar; } | |
83569fb8 | 1262 | EOF |
66a704c4 | 1263 | if AC_TRY_COMMAND(${CC-cc} -nostdlib -nostartfiles $no_ssp conftest.c -o conftest conftest.so); then |
2a723ff6 | 1264 | libc_cv_protected_data=yes |
83569fb8 | 1265 | fi |
2a723ff6 JM |
1266 | fi |
1267 | rm -f conftest.* | |
1268 | ]) | |
83569fb8 L |
1269 | AC_SUBST(libc_cv_protected_data) |
1270 | ||
a0da5fe1 UD |
1271 | AC_CACHE_CHECK(for broken __attribute__((alias())), |
1272 | libc_cv_broken_alias_attribute, | |
1273 | [cat > conftest.c <<EOF | |
1274 | extern int foo (int x) __asm ("xyzzy"); | |
1275 | int bar (int x) { return x; } | |
1276 | extern __typeof (bar) foo __attribute ((weak, alias ("bar"))); | |
1277 | extern int dfoo; | |
1278 | extern __typeof (dfoo) dfoo __asm ("abccb"); | |
1279 | int dfoo = 1; | |
37ba7d66 | 1280 | EOF |
a0da5fe1 UD |
1281 | libc_cv_broken_alias_attribute=yes |
1282 | if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then | |
1283 | if grep 'xyzzy' conftest.s >/dev/null && | |
1284 | grep 'abccb' conftest.s >/dev/null; then | |
1285 | libc_cv_broken_alias_attribute=no | |
1286 | fi | |
1287 | fi | |
1288 | rm -f conftest.c conftest.s | |
1289 | ]) | |
1290 | if test $libc_cv_broken_alias_attribute = yes; then | |
1291 | AC_MSG_ERROR(working alias attribute support required) | |
1292 | fi | |
1293 | ||
2a723ff6 JM |
1294 | AC_CACHE_CHECK(whether to put _rtld_local into .sdata section, |
1295 | libc_cv_have_sdata_section, | |
1296 | [echo "int i;" > conftest.c | |
1297 | libc_cv_have_sdata_section=no | |
1298 | if ${CC-cc} $LDFLAGS -fPIC -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \ | |
1299 | | grep '\.sdata' >/dev/null; then | |
1300 | libc_cv_have_sdata_section=yes | |
1301 | fi | |
1302 | rm -f conftest.c conftest.so | |
1303 | ]) | |
1304 | if test $libc_cv_have_sdata_section = yes; then | |
1305 | AC_DEFINE(HAVE_SDATA_SECTION) | |
a0da5fe1 | 1306 | fi |
0d01dace | 1307 | |
a0da5fe1 UD |
1308 | AC_CACHE_CHECK(whether to use .ctors/.dtors header and trailer, |
1309 | libc_cv_ctors_header, [dnl | |
1310 | libc_cv_ctors_header=yes | |
07037eeb JM |
1311 | LIBC_TRY_LINK_STATIC([ |
1312 | __attribute__ ((constructor)) void ctor (void) { asm (""); } | |
1313 | __attribute__ ((destructor)) void dtor (void) { asm (""); } | |
113ddea4 | 1314 | ], |
a0da5fe1 | 1315 | [dnl |
113ddea4 | 1316 | AS_IF([$READELF -WS conftest$ac_exeext | $AWK ' |
92963737 | 1317 | { gsub(/\@<:@ */, "@<:@") } |
113ddea4 RM |
1318 | $2 == ".ctors" || $2 == ".dtors" { |
1319 | size = strtonum("0x" $6) | |
1320 | align = strtonum("0x" $NF) | |
1321 | seen@<:@$2@:>@ = 1 | |
1322 | stub@<:@$2@:>@ = size == align * 2 | |
92963737 | 1323 | } |
113ddea4 RM |
1324 | END { |
1325 | ctors_ok = !seen@<:@".ctors"@:>@ || stub@<:@".ctors"@:>@ | |
1326 | dtors_ok = !seen@<:@".dtors"@:>@ || stub@<:@".dtors"@:>@ | |
1327 | exit ((ctors_ok && dtors_ok) ? 0 : 1) | |
1328 | } | |
1329 | '], [libc_cv_ctors_header=no]) | |
1330 | ], [dnl | |
1331 | AC_MSG_ERROR([missing __attribute__ ((constructor)) support??]) | |
1332 | ]) | |
a0da5fe1 UD |
1333 | ]) |
1334 | if test $libc_cv_ctors_header = no; then | |
1335 | AC_DEFINE(NO_CTORS_DTORS_SECTIONS) | |
1336 | fi | |
5241882c | 1337 | |
a0da5fe1 UD |
1338 | AC_CACHE_CHECK(for libunwind-support in compiler, |
1339 | libc_cv_cc_with_libunwind, [ | |
1340 | cat > conftest.c <<EOF | |
cbdb12de UD |
1341 | int main (void) { return 0; } |
1342 | EOF | |
a0da5fe1 | 1343 | if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -static -o conftest \ |
8175a253 | 1344 | conftest.c -v 2>&1 >/dev/null | grep ' -lunwind ' >/dev/null; then |
a0da5fe1 UD |
1345 | libc_cv_cc_with_libunwind=yes |
1346 | else | |
1347 | libc_cv_cc_with_libunwind=no | |
c776b3d7 | 1348 | fi |
a0da5fe1 UD |
1349 | rm -f conftest*]) |
1350 | AC_SUBST(libc_cv_cc_with_libunwind) | |
1351 | if test $libc_cv_cc_with_libunwind = yes; then | |
1352 | AC_DEFINE(HAVE_CC_WITH_LIBUNWIND) | |
1353 | fi | |
c776b3d7 | 1354 | |
a0da5fe1 UD |
1355 | ASFLAGS_config= |
1356 | AC_CACHE_CHECK(whether --noexecstack is desirable for .S files, | |
1357 | libc_cv_as_noexecstack, [dnl | |
1358 | cat > conftest.c <<EOF | |
35915ec8 UD |
1359 | void foo (void) { } |
1360 | EOF | |
a0da5fe1 UD |
1361 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS |
1362 | -S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \ | |
8175a253 | 1363 | && grep .note.GNU-stack conftest.s >/dev/null \ |
a0da5fe1 UD |
1364 | && AC_TRY_COMMAND([${CC-cc} $ASFLAGS -Wa,--noexecstack |
1365 | -c -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD]) | |
1366 | then | |
1367 | libc_cv_as_noexecstack=yes | |
1368 | else | |
1369 | libc_cv_as_noexecstack=no | |
1370 | fi | |
1371 | rm -f conftest*]) | |
1372 | if test $libc_cv_as_noexecstack = yes; then | |
1373 | ASFLAGS_config="$ASFLAGS_config -Wa,--noexecstack" | |
1374 | fi | |
1375 | AC_SUBST(ASFLAGS_config) | |
2abf9ff1 | 1376 | |
a0da5fe1 UD |
1377 | AC_CACHE_CHECK(for -z combreloc, |
1378 | libc_cv_z_combreloc, [dnl | |
1379 | cat > conftest.c <<EOF | |
d555194c UD |
1380 | extern int bar (int); |
1381 | extern int mumble; | |
1382 | int foo (void) { return bar (mumble); } | |
a711b01d | 1383 | EOF |
a0da5fe1 | 1384 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS |
66a704c4 | 1385 | -fPIC -shared $no_ssp -o conftest.so conftest.c |
35cd3c97 | 1386 | -nostdlib -nostartfiles |
c2f55635 | 1387 | -Wl,-z,combreloc 1>&AS_MESSAGE_LOG_FD]) |
a0da5fe1 | 1388 | then |
a711b01d UD |
1389 | dnl The following test is a bit weak. We must use a tool which can test |
1390 | dnl cross-platform since the gcc used can be a cross compiler. Without | |
1391 | dnl introducing new options this is not easily doable. Instead use a tool | |
1392 | dnl which always is cross-platform: readelf. To detect whether -z combreloc | |
1393 | dnl look for a section named .rel.dyn. | |
a0da5fe1 UD |
1394 | if $READELF -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then |
1395 | libc_cv_z_combreloc=yes | |
fdde8349 UD |
1396 | else |
1397 | libc_cv_z_combreloc=no | |
a711b01d | 1398 | fi |
a0da5fe1 UD |
1399 | else |
1400 | libc_cv_z_combreloc=no | |
1401 | fi | |
1402 | rm -f conftest*]) | |
1403 | if test "$libc_cv_z_combreloc" = yes; then | |
1404 | AC_DEFINE(HAVE_Z_COMBRELOC) | |
1405 | fi | |
1406 | AC_SUBST(libc_cv_z_combreloc) | |
2abf9ff1 | 1407 | |
6bfea974 L |
1408 | LIBC_LINKER_FEATURE([-z execstack], [-Wl,-z,execstack], |
1409 | [libc_cv_z_execstack=yes], [libc_cv_z_execstack=no]) | |
a0da5fe1 | 1410 | AC_SUBST(libc_cv_z_execstack) |
c9c60884 | 1411 | |
a0da5fe1 | 1412 | AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl |
4da0431d JM |
1413 | LIBC_TRY_CC_OPTION([-fpie], [libc_cv_fpie=yes], [libc_cv_fpie=no]) |
1414 | ]) | |
c9c60884 | 1415 | |
a0da5fe1 | 1416 | AC_SUBST(libc_cv_fpie) |
871b9158 | 1417 | |
a0da5fe1 UD |
1418 | AC_CACHE_CHECK(for --hash-style option, |
1419 | libc_cv_hashstyle, [dnl | |
1420 | cat > conftest.c <<EOF | |
871b9158 UD |
1421 | int _start (void) { return 42; } |
1422 | EOF | |
66a704c4 | 1423 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp |
a0da5fe1 UD |
1424 | -fPIC -shared -o conftest.so conftest.c |
1425 | -Wl,--hash-style=both -nostdlib 1>&AS_MESSAGE_LOG_FD]) | |
1426 | then | |
1427 | libc_cv_hashstyle=yes | |
1428 | else | |
1429 | libc_cv_hashstyle=no | |
1430 | fi | |
1431 | rm -f conftest*]) | |
1432 | AC_SUBST(libc_cv_hashstyle) | |
1433 | ||
1434 | # The linker's default -shared behavior is good enough if it | |
1435 | # does these things that our custom linker scripts ensure that | |
1436 | # all allocated NOTE sections come first. | |
1437 | if test "$use_default_link" = default; then | |
1438 | AC_CACHE_CHECK([for sufficient default -shared layout], | |
1439 | libc_cv_use_default_link, [dnl | |
1440 | libc_cv_use_default_link=no | |
1441 | cat > conftest.s <<\EOF | |
fd5e21c7 RM |
1442 | .section .note.a,"a",%note |
1443 | .balign 4 | |
1444 | .long 4,4,9 | |
1445 | .string "GNU" | |
1446 | .string "foo" | |
1447 | .section .note.b,"a",%note | |
1448 | .balign 4 | |
1449 | .long 4,4,9 | |
1450 | .string "GNU" | |
1451 | .string "bar" | |
1452 | EOF | |
a0da5fe1 | 1453 | if AC_TRY_COMMAND([dnl |
fd5e21c7 RM |
1454 | ${CC-cc} $ASFLAGS -shared -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD]) && |
1455 | ac_try=`$READELF -S conftest.so | sed -n \ | |
1456 | ['${x;p;} | |
1457 | s/^ *\[ *[1-9][0-9]*\] *\([^ ][^ ]*\) *\([^ ][^ ]*\) .*$/\2 \1/ | |
1458 | t a | |
1459 | b | |
1460 | : a | |
1461 | H']` | |
a0da5fe1 UD |
1462 | then |
1463 | libc_seen_a=no libc_seen_b=no | |
1464 | set -- $ac_try | |
1465 | while test $# -ge 2 -a "$1" = NOTE; do | |
1466 | case "$2" in | |
1467 | .note.a) libc_seen_a=yes ;; | |
1468 | .note.b) libc_seen_b=yes ;; | |
1469 | esac | |
1470 | shift 2 | |
1471 | done | |
1472 | case "$libc_seen_a$libc_seen_b" in | |
1473 | yesyes) | |
1474 | libc_cv_use_default_link=yes | |
1475 | ;; | |
1476 | *) | |
1477 | echo >&AS_MESSAGE_LOG_FD "\ | |
fd5e21c7 RM |
1478 | $libc_seen_a$libc_seen_b from: |
1479 | $ac_try" | |
a0da5fe1 UD |
1480 | ;; |
1481 | esac | |
fd5e21c7 | 1482 | fi |
a0da5fe1 UD |
1483 | rm -f conftest*]) |
1484 | use_default_link=$libc_cv_use_default_link | |
fd26970f | 1485 | fi |
49803108 | 1486 | |
89569c8b L |
1487 | AC_CACHE_CHECK(for GLOB_DAT reloc, |
1488 | libc_cv_has_glob_dat, [dnl | |
1489 | cat > conftest.c <<EOF | |
1490 | extern int mumble; | |
1491 | int foo (void) { return mumble; } | |
1492 | EOF | |
1493 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS | |
1494 | -fPIC -shared -o conftest.so conftest.c | |
66a704c4 | 1495 | -nostdlib -nostartfiles $no_ssp |
89569c8b L |
1496 | 1>&AS_MESSAGE_LOG_FD]) |
1497 | then | |
1498 | dnl look for GLOB_DAT relocation. | |
1499 | if $READELF -rW conftest.so | grep '_GLOB_DAT' > /dev/null; then | |
1500 | libc_cv_has_glob_dat=yes | |
1501 | else | |
1502 | libc_cv_has_glob_dat=no | |
1503 | fi | |
1504 | else | |
1505 | libc_cv_has_glob_dat=no | |
1506 | fi | |
1507 | rm -f conftest*]) | |
1508 | AC_SUBST(libc_cv_has_glob_dat) | |
1509 | ||
5c550700 RM |
1510 | AC_CACHE_CHECK(linker output format, libc_cv_output_format, [dnl |
1511 | if libc_cv_output_format=` | |
66a704c4 | 1512 | ${CC-cc} -nostartfiles -nostdlib $no_ssp -Wl,--print-output-format 2>&AS_MESSAGE_LOG_FD` |
5c550700 RM |
1513 | then |
1514 | : | |
1515 | else | |
1516 | libc_cv_output_format= | |
1517 | fi | |
1518 | test -n "$libc_cv_output_format" || libc_cv_output_format=unknown]) | |
1519 | AC_SUBST(libc_cv_output_format) | |
1520 | ||
22dca1ea | 1521 | AC_CACHE_CHECK(for -fno-toplevel-reorder -fno-section-anchors, libc_cv_fno_toplevel_reorder, [dnl |
49803108 AJ |
1522 | cat > conftest.c <<EOF |
1523 | int foo; | |
1524 | EOF | |
22dca1ea | 1525 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fno-toplevel-reorder -fno-section-anchors |
49803108 AJ |
1526 | conftest.c 1>&AS_MESSAGE_LOG_FD]) |
1527 | then | |
18e2ac6d | 1528 | libc_cv_fno_toplevel_reorder=yes |
49803108 | 1529 | else |
18e2ac6d | 1530 | libc_cv_fno_toplevel_reorder=no |
49803108 AJ |
1531 | fi |
1532 | rm -f conftest*]) | |
18e2ac6d | 1533 | if test $libc_cv_fno_toplevel_reorder = yes; then |
22dca1ea | 1534 | fno_unit_at_a_time="-fno-toplevel-reorder -fno-section-anchors" |
18e2ac6d | 1535 | else |
49803108 AJ |
1536 | fno_unit_at_a_time=-fno-unit-at-a-time |
1537 | fi | |
1538 | AC_SUBST(fno_unit_at_a_time) | |
fd26970f | 1539 | |
61655555 L |
1540 | AC_CACHE_CHECK([for -mtls-dialect=gnu2], libc_cv_mtls_dialect_gnu2, |
1541 | [dnl | |
1542 | cat > conftest.c <<EOF | |
1543 | __thread int i; | |
1544 | void foo (void) | |
1545 | { | |
1546 | i = 10; | |
1547 | } | |
1548 | EOF | |
1549 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fPIC -mtls-dialect=gnu2 | |
1550 | conftest.c 1>&AS_MESSAGE_LOG_FD]) | |
1551 | then | |
1552 | libc_cv_mtls_dialect_gnu2=yes | |
1553 | else | |
1554 | libc_cv_mtls_dialect_gnu2=no | |
1555 | fi | |
1556 | rm -f conftest*]) | |
1557 | AC_SUBST(libc_cv_mtls_dialect_gnu2) | |
1558 | LIBC_CONFIG_VAR([have-mtls-dialect-gnu2], [$libc_cv_mtls_dialect_gnu2]) | |
1559 | ||
a0da5fe1 UD |
1560 | AC_CACHE_CHECK(whether cc puts quotes around section names, |
1561 | libc_cv_have_section_quotes, | |
1562 | [cat > conftest.c <<EOF | |
1563 | static const int foo | |
1564 | __attribute__ ((section ("bar"))) = 1; | |
e26dd47f | 1565 | EOF |
a0da5fe1 UD |
1566 | if ${CC-cc} -S conftest.c -o conftest.s; then |
1567 | if grep '\.section.*"bar"' conftest.s >/dev/null; then | |
1568 | libc_cv_have_section_quotes=yes | |
e26dd47f | 1569 | else |
a0da5fe1 | 1570 | libc_cv_have_section_quotes=no |
e26dd47f | 1571 | fi |
a0da5fe1 UD |
1572 | else |
1573 | libc_cv_have_section_quotes=unknown | |
1574 | fi | |
1575 | rm -f conftest.{c,s} | |
1576 | ]) | |
1577 | if test $libc_cv_have_section_quotes = yes; then | |
1578 | AC_DEFINE(HAVE_SECTION_QUOTES) | |
9a97d1f7 UD |
1579 | fi |
1580 | ||
d555194c UD |
1581 | AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl |
1582 | cat > conftest.c <<\EOF | |
1583 | void zero (void *x) | |
1584 | { | |
a52d1562 | 1585 | __builtin_memset (x, 0, 1000); |
d555194c UD |
1586 | } |
1587 | EOF | |
1588 | dnl | |
1589 | if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]); | |
1590 | then | |
1591 | libc_cv_gcc_builtin_memset=no | |
1592 | else | |
1593 | libc_cv_gcc_builtin_memset=yes | |
1594 | fi | |
1595 | rm -f conftest* ]) | |
1596 | if test "$libc_cv_gcc_builtin_memset" = yes ; then | |
1597 | AC_DEFINE(HAVE_BUILTIN_MEMSET) | |
1598 | fi | |
1599 | ||
85dd1003 UD |
1600 | AC_CACHE_CHECK(for redirection of built-in functions, libc_cv_gcc_builtin_redirection, [dnl |
1601 | cat > conftest.c <<\EOF | |
1602 | extern char *strstr (const char *, const char *) __asm ("my_strstr"); | |
1603 | char *foo (const char *a, const char *b) | |
1604 | { | |
1605 | return __builtin_strstr (a, b); | |
1606 | } | |
1607 | EOF | |
1608 | dnl | |
1609 | if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "my_strstr" > /dev/null]); | |
1610 | then | |
1611 | libc_cv_gcc_builtin_redirection=yes | |
1612 | else | |
1613 | libc_cv_gcc_builtin_redirection=no | |
1614 | fi | |
1615 | rm -f conftest* ]) | |
3ce1f295 UD |
1616 | if test "$libc_cv_gcc_builtin_redirection" = no; then |
1617 | AC_MSG_ERROR([support for the symbol redirection needed]) | |
85dd1003 UD |
1618 | fi |
1619 | ||
7998fa78 AS |
1620 | dnl Determine how to disable generation of FMA instructions. |
1621 | AC_CACHE_CHECK([for compiler option to disable generation of FMA instructions], | |
1622 | libc_cv_cc_nofma, [dnl | |
1623 | libc_cv_cc_nofma= | |
1624 | for opt in -ffp-contract=off -mno-fused-madd; do | |
1625 | LIBC_TRY_CC_OPTION([$opt], [libc_cv_cc_nofma=$opt; break]) | |
1626 | done]) | |
bef0b507 | 1627 | AC_SUBST(libc_cv_cc_nofma) |
7998fa78 | 1628 | |
2cf9ad57 RM |
1629 | if test -n "$submachine"; then |
1630 | AC_CACHE_CHECK([for compiler option for CPU variant], | |
f7d82dc9 | 1631 | libc_cv_cc_submachine, [dnl |
2cf9ad57 RM |
1632 | libc_cv_cc_submachine=no |
1633 | for opt in "-march=$submachine" "-mcpu=$submachine"; do | |
40b601fb | 1634 | LIBC_TRY_CC_OPTION([$opt], [ |
2cf9ad57 | 1635 | libc_cv_cc_submachine="$opt" |
40b601fb | 1636 | break], []) |
2cf9ad57 RM |
1637 | done]) |
1638 | if test "x$libc_cv_cc_submachine" = xno; then | |
1639 | AC_MSG_ERROR([${CC-cc} does not support $submachine]) | |
1640 | fi | |
1641 | fi | |
1642 | AC_SUBST(libc_cv_cc_submachine) | |
1643 | ||
85c2e611 AZ |
1644 | AC_CACHE_CHECK(if $CC accepts -fno-tree-loop-distribute-patterns with \ |
1645 | __attribute__ ((__optimize__)), libc_cv_cc_loop_to_function, [dnl | |
1646 | cat > conftest.c <<EOF | |
1647 | void | |
1648 | __attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns"))) | |
1649 | foo (void) {} | |
1650 | EOF | |
1651 | libc_cv_cc_loop_to_function=no | |
1652 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c]) | |
1653 | then | |
1654 | libc_cv_cc_loop_to_function=yes | |
1655 | fi | |
1656 | rm -f conftest*]) | |
1657 | if test $libc_cv_cc_loop_to_function = yes; then | |
1658 | AC_DEFINE(HAVE_CC_INHIBIT_LOOP_TO_LIBCALL) | |
1659 | fi | |
1660 | AC_SUBST(libc_cv_cc_loop_to_function) | |
1661 | ||
c8f3e6db UD |
1662 | dnl Check whether we have the gd library available. |
1663 | AC_MSG_CHECKING(for libgd) | |
6dab8688 UD |
1664 | if test "$with_gd" != "no"; then |
1665 | old_CFLAGS="$CFLAGS" | |
1666 | CFLAGS="$CFLAGS $libgd_include" | |
1667 | old_LDFLAGS="$LDFLAGS" | |
1668 | LDFLAGS="$LDFLAGS $libgd_ldflags" | |
1669 | old_LIBS="$LIBS" | |
1670 | LIBS="$LIBS -lgd -lpng -lz -lm" | |
1671 | AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no) | |
1672 | CFLAGS="$old_CFLAGS" | |
1673 | LDFLAGS="$old_LDFLAGS" | |
1674 | LIBS="$old_LIBS" | |
1675 | else | |
1676 | LIBGD=no | |
1677 | fi | |
c8f3e6db UD |
1678 | AC_MSG_RESULT($LIBGD) |
1679 | AC_SUBST(LIBGD) | |
3d558f4e | 1680 | |
2fff3d93 UD |
1681 | # SELinux detection |
1682 | if test x$with_selinux = xno ; then | |
1683 | have_selinux=no; | |
1684 | else | |
1685 | # See if we have the SELinux library | |
1686 | AC_CHECK_LIB(selinux, is_selinux_enabled, | |
1687 | have_selinux=yes, have_selinux=no) | |
49155d51 | 1688 | if test x$with_selinux = xyes ; then |
2fff3d93 | 1689 | if test x$have_selinux = xno ; then |
0699f766 | 1690 | AC_MSG_ERROR([SELinux explicitly required, but SELinux library not found]) |
2fff3d93 UD |
1691 | fi |
1692 | fi | |
1693 | fi | |
1694 | # Check if we're building with SELinux support. | |
1695 | if test "x$have_selinux" = xyes; then | |
943db9eb | 1696 | AC_DEFINE(HAVE_SELINUX, 1, [SELinux support]) |
ec23b9be UD |
1697 | |
1698 | # See if we have the libaudit library | |
943db9eb | 1699 | AC_CHECK_LIB(audit, audit_log_user_avc_message, |
77e8bddf | 1700 | have_libaudit=yes, have_libaudit=no) |
ec23b9be | 1701 | if test "x$have_libaudit" = xyes; then |
943db9eb | 1702 | AC_DEFINE(HAVE_LIBAUDIT, 1, [SELinux libaudit support]) |
ec23b9be UD |
1703 | fi |
1704 | AC_SUBST(have_libaudit) | |
1f063dca UD |
1705 | |
1706 | # See if we have the libcap library | |
1707 | AC_CHECK_LIB(cap, cap_init, have_libcap=yes, have_libcap=no) | |
1708 | if test "x$have_libcap" = xyes; then | |
1709 | AC_DEFINE(HAVE_LIBCAP, 1, [SELinux libcap support]) | |
1710 | fi | |
1711 | AC_SUBST(have_libcap) | |
2fff3d93 UD |
1712 | fi |
1713 | AC_SUBST(have_selinux) | |
1714 | ||
61653dfb RM |
1715 | CPPUNDEFS= |
1716 | dnl Check for silly hacked compilers predefining _FORTIFY_SOURCE. | |
1717 | dnl Since we are building the implementations of the fortified functions here, | |
1718 | dnl having the macro defined interacts very badly. | |
1719 | AC_CACHE_CHECK([for _FORTIFY_SOURCE predefine], libc_cv_predef_fortify_source, | |
1720 | [AC_TRY_COMPILE([], [ | |
1721 | #ifdef _FORTIFY_SOURCE | |
1722 | # error bogon | |
1723 | #endif], | |
1724 | [libc_cv_predef_fortify_source=no], | |
1725 | [libc_cv_predef_fortify_source=yes])]) | |
1726 | if test $libc_cv_predef_fortify_source = yes; then | |
1727 | CPPUNDEFS="${CPPUNDEFS:+$CPPUNDEFS }-U_FORTIFY_SOURCE" | |
1728 | fi | |
1729 | AC_SUBST(CPPUNDEFS) | |
1730 | ||
61b1ef6e MF |
1731 | # Some linkers on some architectures support __ehdr_start but with |
1732 | # bugs. Make sure usage of it does not create relocations in the | |
1733 | # output (as the linker should resolve them all for us). | |
1734 | AC_CACHE_CHECK([whether the linker provides working __ehdr_start], | |
44c4e5d5 RM |
1735 | libc_cv_ehdr_start, [ |
1736 | old_CFLAGS="$CFLAGS" | |
1737 | old_LDFLAGS="$LDFLAGS" | |
1738 | old_LIBS="$LIBS" | |
1739 | CFLAGS="$CFLAGS -fPIC" | |
66a704c4 | 1740 | LDFLAGS="$LDFLAGS -nostdlib -nostartfiles -shared $no_ssp" |
44c4e5d5 RM |
1741 | LIBS= |
1742 | AC_LINK_IFELSE([AC_LANG_SOURCE([ | |
61b1ef6e MF |
1743 | typedef struct { |
1744 | char foo; | |
1745 | long val; | |
1746 | } Ehdr; | |
1747 | extern const Ehdr __ehdr_start __attribute__ ((visibility ("hidden"))); | |
1748 | long ehdr (void) { return __ehdr_start.val; } | |
44c4e5d5 | 1749 | ])], |
61b1ef6e MF |
1750 | [if $READELF -r conftest | fgrep __ehdr_start >/dev/null; then |
1751 | libc_cv_ehdr_start=broken | |
1752 | else | |
1753 | libc_cv_ehdr_start=yes | |
1754 | fi], [libc_cv_ehdr_start=no]) | |
44c4e5d5 RM |
1755 | CFLAGS="$old_CFLAGS" |
1756 | LDFLAGS="$old_LDFLAGS" | |
1757 | LIBS="$old_LIBS" | |
1758 | ]) | |
61b1ef6e | 1759 | if test "$libc_cv_ehdr_start" = yes; then |
44c4e5d5 | 1760 | AC_DEFINE([HAVE_EHDR_START]) |
61b1ef6e MF |
1761 | elif test "$libc_cv_ehdr_start" = broken; then |
1762 | AC_MSG_WARN([linker is broken -- you should upgrade]) | |
9fe7e787 RM |
1763 | fi |
1764 | ||
1765 | AC_CACHE_CHECK(for __builtin_trap with no external dependencies, | |
1766 | libc_cv_builtin_trap, [dnl | |
1767 | libc_cv_builtin_trap=no | |
1768 | AC_TRY_COMPILE([], [__builtin_trap ()], [ | |
1769 | libc_undefs=`$NM -u conftest.o | | |
1770 | LC_ALL=C $AWK '$1 == "U" { print $2 | "sort -u"; next } { exit(1) }' \ | |
1771 | 2>&AS_MESSAGE_LOG_FD` || { | |
1772 | AC_MSG_ERROR([confusing output from $NM -u]) | |
1773 | } | |
1774 | echo >&AS_MESSAGE_LOG_FD "libc_undefs='$libc_undefs'" | |
1775 | if test -z "$libc_undefs"; then | |
1776 | libc_cv_builtin_trap=yes | |
1777 | fi])]) | |
1778 | if test $libc_cv_builtin_trap = yes; then | |
1779 | AC_DEFINE([HAVE_BUILTIN_TRAP]) | |
44c4e5d5 RM |
1780 | fi |
1781 | ||
99e1dc0a FW |
1782 | dnl C++ feature tests. |
1783 | AC_LANG_PUSH([C++]) | |
1784 | ||
1785 | AC_CACHE_CHECK([whether the C++ compiler supports thread_local], | |
1786 | libc_cv_cxx_thread_local, [ | |
1787 | old_CXXFLAGS="$CXXFLAGS" | |
1788 | CXXFLAGS="$CXXFLAGS -std=gnu++11" | |
1789 | AC_COMPILE_IFELSE([AC_LANG_SOURCE([ | |
1790 | #include <thread> | |
1791 | ||
1792 | // Compiler support. | |
1793 | struct S | |
1794 | { | |
1795 | S (); | |
1796 | ~S (); | |
1797 | }; | |
1798 | thread_local S s; | |
1799 | S * get () { return &s; } | |
1800 | ||
1801 | // libstdc++ support. | |
1802 | #ifndef _GLIBCXX_HAVE___CXA_THREAD_ATEXIT_IMPL | |
1803 | #error __cxa_thread_atexit_impl not supported | |
1804 | #endif | |
1805 | ])], | |
1806 | [libc_cv_cxx_thread_local=yes], | |
1807 | [libc_cv_cxx_thread_local=no]) | |
1808 | CXXFLAGS="$old_CXXFLAGS" | |
1809 | ]) | |
1810 | AC_SUBST(libc_cv_cxx_thread_local) | |
1811 | ||
1812 | AC_LANG_POP([C++]) | |
1813 | dnl End of C++ feature tests. | |
1814 | ||
c224a18a RM |
1815 | ### End of automated tests. |
1816 | ### Now run sysdeps configure fragments. | |
1817 | ||
cb343854 | 1818 | # They also can set these variables. |
591e1ffb | 1819 | use_ldconfig=no |
cb343854 | 1820 | ldd_rewrite_script=no |
77259608 | 1821 | libc_cv_sysconfdir=$sysconfdir |
4248b1b1 | 1822 | libc_cv_localstatedir=$localstatedir |
74bd2300 | 1823 | libc_cv_gcc_unwind_find_fde=no |
e2fd3cbe | 1824 | libc_cv_idn=no |
cb343854 | 1825 | |
28f540f4 | 1826 | # Iterate over all the sysdep directories we will use, running their |
09055553 | 1827 | # configure fragments. |
28f540f4 | 1828 | for dir in $sysnames; do |
57ba7bb4 UD |
1829 | case $dir in |
1830 | /*) dest=$dir ;; | |
1831 | *) dest=$srcdir/$dir ;; | |
1832 | esac | |
1833 | if test -r $dest/configure; then | |
d1149385 | 1834 | AC_MSG_RESULT(running configure fragment for $dir) |
57ba7bb4 | 1835 | . $dest/configure |
28f540f4 | 1836 | fi |
28f540f4 RM |
1837 | done |
1838 | ||
5695d46f AS |
1839 | if test x"$build_mathvec" = xnotset; then |
1840 | build_mathvec=no | |
1841 | fi | |
1842 | LIBC_CONFIG_VAR([build-mathvec], [$build_mathvec]) | |
1843 | ||
7ffa9423 AZ |
1844 | AC_SUBST(libc_extra_cflags) |
1845 | AC_SUBST(libc_extra_cppflags) | |
1846 | ||
74bd2300 UD |
1847 | if test x$libc_cv_gcc_unwind_find_fde = xyes; then |
1848 | AC_DEFINE(EXPORT_UNWIND_FIND_FDE) | |
1849 | fi | |
1850 | AC_SUBST(libc_cv_gcc_unwind_find_fde) | |
1851 | ||
6e6249d0 RM |
1852 | # A sysdeps configure fragment can reset this if IFUNC is not actually |
1853 | # usable even though the assembler knows how to generate the symbol type. | |
1854 | if test x"$libc_cv_ld_gnu_indirect_function" = xyes; then | |
1855 | AC_DEFINE(HAVE_IFUNC) | |
1856 | fi | |
1857 | ||
022dfdce SL |
1858 | if test x"$libc_cv_gcc_indirect_function" = xyes; then |
1859 | AC_DEFINE(HAVE_GCC_IFUNC) | |
1860 | fi | |
1861 | ||
3cc3ef96 RM |
1862 | # This is far from the AC_ARG_ENABLE that sets it so that a sysdeps |
1863 | # configure fragment can override the value to prevent this AC_DEFINE. | |
1864 | AC_SUBST(use_nscd) | |
1865 | if test "x$use_nscd" != xno; then | |
1866 | AC_DEFINE([USE_NSCD]) | |
1867 | fi | |
c53d909c RM |
1868 | if test "x$build_nscd" = xdefault; then |
1869 | build_nscd=$use_nscd | |
1870 | fi | |
3cc3ef96 | 1871 | |
84384f5b | 1872 | AC_SUBST(libc_cv_slibdir) |
aaa8cb4b | 1873 | AC_SUBST(libc_cv_rtlddir) |
90fe682d | 1874 | AC_SUBST(libc_cv_complocaledir) |
77259608 | 1875 | AC_SUBST(libc_cv_sysconfdir) |
4248b1b1 | 1876 | AC_SUBST(libc_cv_localstatedir) |
1ef32c3d UD |
1877 | AC_SUBST(libc_cv_rootsbindir) |
1878 | ||
f57f8055 RM |
1879 | if test x$use_ldconfig = xyes; then |
1880 | AC_DEFINE(USE_LDCONFIG) | |
1881 | fi | |
591e1ffb | 1882 | AC_SUBST(use_ldconfig) |
cb343854 | 1883 | AC_SUBST(ldd_rewrite_script) |
84384f5b | 1884 | |
650425ce | 1885 | AC_SUBST(static) |
ff3d7ed3 | 1886 | AC_SUBST(shared) |
a334319f | 1887 | |
ff886b82 UD |
1888 | AC_CACHE_CHECK([whether -fPIC is default], libc_cv_pic_default, |
1889 | [libc_cv_pic_default=yes | |
cc3fa755 | 1890 | cat > conftest.c <<EOF |
9756dfe1 | 1891 | #if defined __PIC__ || defined __pic__ || defined PIC || defined pic |
cc3fa755 UD |
1892 | # error PIC is default. |
1893 | #endif | |
1894 | EOF | |
0b4ee387 | 1895 | if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then |
ff886b82 | 1896 | libc_cv_pic_default=no |
cc3fa755 UD |
1897 | fi |
1898 | rm -f conftest.*]) | |
ff886b82 | 1899 | AC_SUBST(libc_cv_pic_default) |
cc3fa755 | 1900 | |
cc08749b L |
1901 | AC_CACHE_CHECK([whether -fPIE is default], libc_cv_pie_default, |
1902 | [libc_cv_pie_default=yes | |
1903 | cat > conftest.c <<EOF | |
1904 | #if defined __PIE__ || defined __pie__ || defined PIE || defined pie | |
1905 | # error PIE is default. | |
1906 | #endif | |
1907 | EOF | |
1908 | if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then | |
1909 | libc_cv_pie_default=no | |
1910 | fi | |
1911 | rm -f conftest.*]) | |
1912 | AC_SUBST(libc_cv_pie_default) | |
1913 | ||
ff3d7ed3 | 1914 | AC_SUBST(profile) |
5107cf1d | 1915 | AC_SUBST(static_nss) |
ff3d7ed3 | 1916 | |
edf5b2d7 UD |
1917 | AC_SUBST(DEFINES) |
1918 | ||
cb8a6dbd | 1919 | dnl See sysdeps/mach/configure.ac for this variable. |
61c83c3f RM |
1920 | AC_SUBST(mach_interface_list) |
1921 | ||
ee74a442 UD |
1922 | VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h` |
1923 | RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h` | |
df4ef2ab | 1924 | AC_SUBST(VERSION) |
ee74a442 | 1925 | AC_SUBST(RELEASE) |
df4ef2ab | 1926 | |
728e272a | 1927 | AC_CONFIG_FILES([config.make Makefile]) |
c118d634 | 1928 | AC_CONFIG_COMMANDS([default],[[ |
737547be UD |
1929 | case $CONFIG_FILES in *config.make*) |
1930 | echo "$config_vars" >> config.make;; | |
1931 | esac | |
c118d634 RM |
1932 | test -d bits || mkdir bits]],[[config_vars='$config_vars']]) |
1933 | AC_OUTPUT |