]>
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++]) | |
60 | AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], | |
61 | [libc_cv_cxx_link_ok=yes], | |
62 | [libc_cv_cxx_link_ok=no]) | |
63 | AC_LANG_POP([C++])]) | |
64 | AS_IF([test $libc_cv_cxx_link_ok != yes], [CXX=]) | |
c0bac8b0 | 65 | |
c72637d4 RM |
66 | if test "`cd $srcdir; /bin/pwd`" = "`/bin/pwd`"; then |
67 | AC_MSG_ERROR([you must configure in a separate build directory]) | |
68 | fi | |
69 | ||
28f540f4 RM |
70 | # This will get text that should go into config.make. |
71 | config_vars= | |
72 | ||
c8f3e6db | 73 | # Check for a --with-gd argument and set libgd-LDFLAGS in config.make. |
6b7f6183 | 74 | AC_ARG_WITH([gd], |
77e8bddf AS |
75 | AC_HELP_STRING([--with-gd=DIR], |
76 | [find libgd include dir and library with prefix DIR]), | |
c8f3e6db UD |
77 | [dnl |
78 | case "$with_gd" in | |
f5f7239f UD |
79 | yes|''|no) ;; |
80 | *) libgd_include="-I$withval/include" | |
c8f3e6db UD |
81 | libgd_ldflags="-L$withval/lib" ;; |
82 | esac | |
83 | ]) | |
6b7f6183 | 84 | AC_ARG_WITH([gd-include], |
77e8bddf AS |
85 | AC_HELP_STRING([--with-gd-include=DIR], |
86 | [find libgd include files in DIR]), | |
87 | [dnl | |
f5f7239f UD |
88 | case "$with_gd_include" in |
89 | ''|no) ;; | |
90 | *) libgd_include="-I$withval" ;; | |
91 | esac | |
92 | ]) | |
6b7f6183 | 93 | AC_ARG_WITH([gd-lib], |
77e8bddf AS |
94 | AC_HELP_STRING([--with-gd-lib=DIR], |
95 | [find libgd library files in DIR]), | |
96 | [dnl | |
f5f7239f UD |
97 | case "$with_gd_lib" in |
98 | ''|no) ;; | |
99 | *) libgd_ldflags="-L$withval" ;; | |
100 | esac | |
101 | ]) | |
102 | ||
103 | if test -n "$libgd_include"; then | |
104 | config_vars="$config_vars | |
cf90163d | 105 | CFLAGS-memusagestat.c = $libgd_include" |
f5f7239f UD |
106 | fi |
107 | if test -n "$libgd_ldflags"; then | |
108 | config_vars="$config_vars | |
109 | libgd-LDFLAGS = $libgd_ldflags" | |
110 | fi | |
28f540f4 | 111 | |
ff3d7ed3 | 112 | dnl Arguments to specify presence of other packages/features. |
6b7f6183 | 113 | AC_ARG_WITH([fp], |
77e8bddf AS |
114 | AC_HELP_STRING([--with-fp], |
115 | [if using floating-point hardware @<:@default=yes@:>@]), | |
6b7f6183 RM |
116 | [with_fp=$withval], |
117 | [with_fp=yes]) | |
675322a5 | 118 | AC_SUBST(with_fp) |
6b7f6183 | 119 | AC_ARG_WITH([binutils], |
77e8bddf AS |
120 | AC_HELP_STRING([--with-binutils=PATH], |
121 | [specify location of binutils (as and ld)]), | |
6b7f6183 RM |
122 | [path_binutils=$withval], |
123 | [path_binutils='']) | |
2fff3d93 | 124 | AC_ARG_WITH([selinux], |
77e8bddf AS |
125 | AC_HELP_STRING([--with-selinux], |
126 | [if building with SELinux support]), | |
2fff3d93 UD |
127 | [with_selinux=$withval], |
128 | [with_selinux=auto]) | |
28f540f4 | 129 | |
6b7f6183 | 130 | AC_ARG_WITH([headers], |
77e8bddf AS |
131 | AC_HELP_STRING([--with-headers=PATH], |
132 | [location of system headers to use | |
6b7f6183 RM |
133 | (for example /usr/src/linux/include) |
134 | @<:@default=compiler default@:>@]), | |
135 | [sysheaders=$withval], | |
136 | [sysheaders='']) | |
c91c505f | 137 | AC_SUBST(sysheaders) |
dbe7a0f5 | 138 | |
f781ef40 RM |
139 | AC_SUBST(use_default_link) |
140 | AC_ARG_WITH([default-link], | |
141 | AC_HELP_STRING([--with-default-link], | |
fd5e21c7 | 142 | [do not use explicit linker scripts]), |
f781ef40 | 143 | [use_default_link=$withval], |
fd5e21c7 | 144 | [use_default_link=default]) |
f781ef40 | 145 | |
6b7f6183 | 146 | AC_ARG_ENABLE([sanity-checks], |
77e8bddf AS |
147 | AC_HELP_STRING([--disable-sanity-checks], |
148 | [really do not use threads (should not be used except in special situations) @<:@default=yes@:>@]), | |
6b7f6183 RM |
149 | [enable_sanity=$enableval], |
150 | [enable_sanity=yes]) | |
a18f587d | 151 | |
6b7f6183 | 152 | AC_ARG_ENABLE([shared], |
77e8bddf | 153 | AC_HELP_STRING([--enable-shared], |
a0da5fe1 | 154 | [build shared library @<:@default=yes if GNU ld@:>@]), |
6b7f6183 | 155 | [shared=$enableval], |
a0da5fe1 | 156 | [shared=yes]) |
6b7f6183 | 157 | AC_ARG_ENABLE([profile], |
77e8bddf AS |
158 | AC_HELP_STRING([--enable-profile], |
159 | [build profiled library @<:@default=no@:>@]), | |
6b7f6183 | 160 | [profile=$enableval], |
11bf311e | 161 | [profile=no]) |
6b7f6183 | 162 | |
740b3dbe L |
163 | AC_ARG_ENABLE([hardcoded-path-in-tests], |
164 | AC_HELP_STRING([--enable-hardcoded-path-in-tests], | |
165 | [hardcode newly built glibc path in tests @<:@default=no@:>@]), | |
166 | [hardcoded_path_in_tests=$enableval], | |
167 | [hardcoded_path_in_tests=no]) | |
168 | AC_SUBST(hardcoded_path_in_tests) | |
169 | ||
35f1e827 UD |
170 | AC_ARG_ENABLE([stackguard-randomization], |
171 | AC_HELP_STRING([--enable-stackguard-randomization], | |
172 | [initialize __stack_chk_guard canary with a random number at program start]), | |
173 | [enable_stackguard_randomize=$enableval], | |
174 | [enable_stackguard_randomize=no]) | |
175 | if test "$enable_stackguard_randomize" = yes; then | |
176 | AC_DEFINE(ENABLE_STACKGUARD_RANDOMIZE) | |
177 | fi | |
178 | ||
1717da59 AK |
179 | AC_ARG_ENABLE([lock-elision], |
180 | AC_HELP_STRING([--enable-lock-elision[=yes/no]], | |
52dfbe13 | 181 | [Enable lock elision for pthread mutexes by default]), |
1717da59 AK |
182 | [enable_lock_elision=$enableval], |
183 | [enable_lock_elision=no]) | |
5a414ff7 | 184 | AC_SUBST(enable_lock_elision) |
1717da59 AK |
185 | if test "$enable_lock_elision" = yes ; then |
186 | AC_DEFINE(ENABLE_LOCK_ELISION) | |
187 | fi | |
188 | ||
6b3a2224 | 189 | dnl Generic infrastructure for drop-in additions to libc. |
6b7f6183 | 190 | AC_ARG_ENABLE([add-ons], |
77e8bddf AS |
191 | AC_HELP_STRING([--enable-add-ons@<:@=DIRS...@:>@], |
192 | [configure and build add-ons in DIR1,DIR2,... | |
193 | search for add-ons if no parameter given]), | |
e0a3ed4f | 194 | , [enable_add_ons=yes]) |
61952351 | 195 | |
6b7f6183 | 196 | AC_ARG_ENABLE([hidden-plt], |
77e8bddf AS |
197 | AC_HELP_STRING([--disable-hidden-plt], |
198 | [do not hide internal function calls to avoid PLT]), | |
6b7f6183 RM |
199 | [hidden=$enableval], |
200 | [hidden=yes]) | |
749a9a4f RM |
201 | if test "x$hidden" = xno; then |
202 | AC_DEFINE(NO_HIDDEN) | |
203 | fi | |
204 | ||
4df8c11d UD |
205 | AC_ARG_ENABLE([bind-now], |
206 | AC_HELP_STRING([--enable-bind-now], | |
207 | [disable lazy relocations in DSOs]), | |
208 | [bindnow=$enableval], | |
209 | [bindnow=no]) | |
210 | AC_SUBST(bindnow) | |
211 | ||
5107cf1d UD |
212 | dnl On some platforms we cannot use dynamic loading. We must provide |
213 | dnl static NSS modules. | |
6b7f6183 | 214 | AC_ARG_ENABLE([static-nss], |
77e8bddf AS |
215 | AC_HELP_STRING([--enable-static-nss], |
216 | [build static NSS modules @<:@default=no@:>@]), | |
6b7f6183 RM |
217 | [static_nss=$enableval], |
218 | [static_nss=no]) | |
834cef7c UD |
219 | dnl Enable static NSS also if we build no shared objects. |
220 | if test x"$static_nss" = xyes || test x"$shared" = xno; then | |
3172f58f | 221 | static_nss=yes |
5107cf1d UD |
222 | AC_DEFINE(DO_STATIC_NSS) |
223 | fi | |
224 | ||
6b7f6183 | 225 | AC_ARG_ENABLE([force-install], |
77e8bddf AS |
226 | AC_HELP_STRING([--disable-force-install], |
227 | [don't force installation of files from this package, even if they are older than the installed files]), | |
6b7f6183 RM |
228 | [force_install=$enableval], |
229 | [force_install=yes]) | |
73237de3 UD |
230 | AC_SUBST(force_install) |
231 | ||
8894bad3 AM |
232 | AC_ARG_ENABLE([maintainer-mode], |
233 | AC_HELP_STRING([--enable-maintainer-mode], | |
234 | [enable make rules and dependencies not useful (and sometimes confusing) to the casual installer]), | |
235 | [maintainer=$enableval], | |
236 | [maintainer=no]) | |
237 | ||
958f238f UD |
238 | dnl On some platforms we allow dropping compatibility with all kernel |
239 | dnl versions. | |
6b7f6183 | 240 | AC_ARG_ENABLE([kernel], |
77e8bddf AS |
241 | AC_HELP_STRING([--enable-kernel=VERSION], |
242 | [compile for compatibility with kernel not older than VERSION]), | |
6b7f6183 RM |
243 | [minimum_kernel=$enableval], |
244 | []) | |
86cfe82d UD |
245 | dnl Prevent unreasonable values. |
246 | if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then | |
247 | # Better nothing than this. | |
248 | minimum_kernel="" | |
269e369f UD |
249 | else |
250 | if test "$minimum_kernel" = current; then | |
251 | minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel= | |
252 | fi | |
86cfe82d | 253 | fi |
958f238f | 254 | |
6cc7d725 UD |
255 | dnl For the development we sometimes want gcc to issue even more warnings. |
256 | dnl This is not the default since many of the extra warnings are not | |
257 | dnl appropriate. | |
6b7f6183 RM |
258 | AC_ARG_ENABLE([all-warnings], |
259 | AC_HELP_STRING([--enable-all-warnings], | |
77e8bddf | 260 | [enable all useful warnings gcc can issue]), |
6b7f6183 RM |
261 | [all_warnings=$enableval], |
262 | []) | |
6cc7d725 UD |
263 | AC_SUBST(all_warnings) |
264 | ||
a4ecc9eb JM |
265 | AC_ARG_ENABLE([werror], |
266 | AC_HELP_STRING([--disable-werror], | |
267 | [do not build with -Werror]), | |
268 | [enable_werror=$enableval], | |
269 | [enable_werror=yes]) | |
270 | AC_SUBST(enable_werror) | |
271 | ||
425ce2ed UD |
272 | AC_ARG_ENABLE([multi-arch], |
273 | AC_HELP_STRING([--enable-multi-arch], | |
274 | [enable single DSO with optimizations for multiple architectures]), | |
275 | [multi_arch=$enableval], | |
6f89d2f3 | 276 | [multi_arch=default]) |
425ce2ed | 277 | |
ff886b82 UD |
278 | AC_ARG_ENABLE([nss-crypt], |
279 | AC_HELP_STRING([--enable-nss-crypt], | |
280 | [enable libcrypt to use nss]), | |
281 | [nss_crypt=$enableval], | |
282 | [nss_crypt=no]) | |
283 | if test x$nss_crypt = xyes; then | |
284 | nss_includes=-I$(nss-config --includedir 2>/dev/null) | |
285 | if test $? -ne 0; then | |
286 | AC_MSG_ERROR([cannot find include directory with nss-config]) | |
287 | fi | |
288 | old_CFLAGS="$CFLAGS" | |
289 | CFLAGS="$CFLAGS $nss_includes" | |
b68e08db | 290 | AC_COMPILE_IFELSE([AC_LANG_PROGRAM([typedef int PRBool; |
ff886b82 UD |
291 | #include <hasht.h> |
292 | #include <nsslowhash.h> | |
b68e08db | 293 | void f (void) { NSSLOW_Init (); }])], |
ff886b82 UD |
294 | libc_cv_nss_crypt=yes, |
295 | AC_MSG_ERROR([ | |
296 | cannot find NSS headers with lowlevel hash function interfaces])) | |
297 | old_LIBS="$LIBS" | |
298 | LIBS="$LIBS -lfreebl3" | |
299 | AC_LINK_IFELSE([AC_LANG_PROGRAM([typedef int PRBool; | |
300 | #include <hasht.h> | |
301 | #include <nsslowhash.h>], | |
302 | [NSSLOW_Init();])], | |
303 | libc_cv_nss_crypt=yes, | |
304 | AC_MSG_ERROR([ | |
305 | cannot link program using lowlevel NSS hash functions])) | |
306 | CFLAGS="$old_CFLAGS" | |
307 | LIBS="$old_LIBS" | |
308 | else | |
309 | libc_cv_nss_crypt=no | |
310 | fi | |
311 | AC_SUBST(libc_cv_nss_crypt) | |
312 | ||
3a097cc7 | 313 | |
021db4be AJ |
314 | AC_ARG_ENABLE([obsolete-rpc], |
315 | AC_HELP_STRING([--enable-obsolete-rpc], | |
316 | [build and install the obsolete RPC code for link-time usage]), | |
317 | [link_obsolete_rpc=$enableval], | |
318 | [link_obsolete_rpc=no]) | |
319 | AC_SUBST(link_obsolete_rpc) | |
320 | ||
321 | if test "$link_obsolete_rpc" = yes; then | |
322 | AC_DEFINE(LINK_OBSOLETE_RPC) | |
323 | fi | |
324 | ||
3a097cc7 RM |
325 | AC_ARG_ENABLE([systemtap], |
326 | [AS_HELP_STRING([--enable-systemtap], | |
327 | [enable systemtap static probe points @<:@default=no@:>@])], | |
328 | [systemtap=$enableval], | |
329 | [systemtap=no]) | |
330 | if test "x$systemtap" != xno; then | |
331 | AC_CACHE_CHECK([for systemtap static probe support], libc_cv_sdt, [dnl | |
332 | old_CFLAGS="$CFLAGS" | |
333 | CFLAGS="-std=gnu99 $CFLAGS" | |
0e3933b9 | 334 | AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#include <sys/sdt.h> |
3a097cc7 RM |
335 | void foo (int i, void *p) |
336 | { | |
337 | asm ("" STAP_PROBE_ASM (foo, bar, STAP_PROBE_ASM_TEMPLATE (2)) "" | |
338 | :: STAP_PROBE_ASM_OPERANDS (2, i, p)); | |
0e3933b9 | 339 | }]])], [libc_cv_sdt=yes], [libc_cv_sdt=no]) |
3a097cc7 RM |
340 | CFLAGS="$old_CFLAGS"]) |
341 | if test $libc_cv_sdt = yes; then | |
342 | AC_DEFINE([USE_STAP_PROBE]) | |
343 | elif test "x$systemtap" != xauto; then | |
344 | AC_MSG_FAILURE([systemtap support needs sys/sdt.h with asm support]) | |
345 | fi | |
346 | fi | |
347 | ||
c53d909c RM |
348 | AC_ARG_ENABLE([build-nscd], |
349 | [AS_HELP_STRING([--disable-build-nscd], | |
350 | [disable building and installing the nscd daemon])], | |
351 | [build_nscd=$enableval], | |
352 | [build_nscd=default]) | |
353 | AC_SUBST(build_nscd) | |
354 | ||
3cc3ef96 RM |
355 | # Note the use of $use_nscd is near the bottom of the file. |
356 | AC_ARG_ENABLE([nscd], | |
357 | [AS_HELP_STRING([--disable-nscd], | |
358 | [library functions will not contact the nscd daemon])], | |
359 | [use_nscd=$enableval], | |
360 | [use_nscd=yes]) | |
361 | ||
e4608715 CD |
362 | AC_ARG_ENABLE([pt_chown], |
363 | [AS_HELP_STRING([--enable-pt_chown], | |
364 | [Enable building and installing pt_chown])], | |
365 | [build_pt_chown=$enableval], | |
366 | [build_pt_chown=no]) | |
367 | AC_SUBST(build_pt_chown) | |
8c12f01d | 368 | if test "$build_pt_chown" = yes; then |
e4608715 CD |
369 | AC_DEFINE(HAVE_PT_CHOWN) |
370 | fi | |
371 | ||
ebf27d12 ST |
372 | # The abi-tags file uses a fairly simplistic model for name recognition that |
373 | # can't distinguish i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a | |
374 | # $host_os of `gnu*' here to be `gnu-gnu*' just so that it can tell. | |
375 | # This doesn't get used much beyond that, so it's fairly safe. | |
376 | case "$host_os" in | |
377 | linux*) | |
378 | ;; | |
379 | gnu*) | |
380 | host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'` | |
381 | ;; | |
382 | esac | |
383 | ||
5695d46f AS |
384 | AC_ARG_ENABLE([mathvec], |
385 | [AS_HELP_STRING([--enable-mathvec], | |
386 | [Enable building and installing mathvec @<:@default depends on architecture@:>@])], | |
387 | [build_mathvec=$enableval], | |
388 | [build_mathvec=notset]) | |
389 | ||
28f540f4 RM |
390 | # We keep the original values in `$config_*' and never modify them, so we |
391 | # can write them unchanged into config.make. Everything else uses | |
392 | # $machine, $vendor, and $os, and changes them whenever convenient. | |
393 | config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os | |
394 | ||
2f64b655 UD |
395 | # Don't allow vendor == "unknown" |
396 | test "$config_vendor" = unknown && config_vendor= | |
397 | config_os="`echo $config_os | sed 's/^unknown-//'`" | |
398 | ||
a2fe9c76 | 399 | # Some configurations imply other options. |
0269750c | 400 | elf=yes |
a2fe9c76 | 401 | |
8f73811b RM |
402 | # The configure fragment of an add-on port can modify these to supplement |
403 | # or override the table in the case statement below. No fragment should | |
404 | # ever change the config_* variables, however. | |
28f540f4 RM |
405 | machine=$config_machine |
406 | vendor=$config_vendor | |
407 | os=$config_os | |
b22d21b3 | 408 | base_os='' |
28f540f4 | 409 | |
2ceaa76a RM |
410 | submachine= |
411 | AC_ARG_WITH([cpu], | |
412 | AS_HELP_STRING([--with-cpu=CPU], [select code for CPU variant]), | |
413 | [dnl | |
414 | case "$withval" in | |
415 | yes|'') AC_MSG_ERROR([--with-cpu requires an argument]) ;; | |
416 | no) ;; | |
417 | *) submachine="$withval" ;; | |
418 | esac | |
419 | ]) | |
420 | ||
05439291 RM |
421 | # An preconfigure script can set this when it wants to disable the sanity |
422 | # check below. | |
423 | libc_config_ok=no | |
424 | ||
10a803e0 RM |
425 | dnl Let sysdeps/*/preconfigure act here, like they can in add-ons. |
426 | LIBC_PRECONFIGURE([$srcdir], [for sysdeps]) | |
427 | ||
8f73811b RM |
428 | dnl Having this here, though empty, makes sure that if add-ons' fragments |
429 | dnl do AC_CONFIG_SUBDIRS([some-dir]), which just sets $subdirs, then | |
430 | dnl our AC_OUTPUT will actually use it. | |
431 | AC_CONFIG_SUBDIRS() | |
432 | ||
e0a3ed4f RM |
433 | case "$enable_add_ons" in |
434 | ''|no) add_ons= ;; | |
435 | yes|'*') | |
436 | add_ons=`cd $srcdir && ls -d 2> /dev/null */configure */sysdeps | | |
437 | sed 's@/[[^/]]*$@@' | sort | uniq` | |
438 | add_ons_automatic=yes | |
439 | ;; | |
440 | *) add_ons=`echo "$enable_add_ons" | sed 's/,/ /g'` | |
441 | add_ons_automatic=no ;; | |
442 | esac | |
443 | ||
444 | configured_add_ons= | |
8f73811b RM |
445 | add_ons_sfx= |
446 | add_ons_pfx= | |
447 | if test x"$add_ons" != x; then | |
448 | for f in $add_ons; do | |
449 | # Some sanity checks | |
450 | case "$f" in | |
451 | crypt) | |
452 | AC_MSG_ERROR([ | |
453 | *** It seems that you're using an old \`crypt' add-on. crypt is now | |
454 | *** part of glibc and using the old add-on will not work with this | |
455 | *** release. Start again with fresh sources and without the old | |
456 | *** \`crypt' add-on.]) | |
457 | ;; | |
458 | localedata) | |
459 | AC_MSG_ERROR([ | |
460 | *** It seems that you're using an old \`localedata' add-on. localedata | |
461 | *** is now part of glibc and using the old add-on will not work with | |
462 | *** this release. Start again with fresh sources and without the old | |
463 | *** \`localedata' add-on.]) | |
464 | ;; | |
465 | esac | |
8f73811b RM |
466 | done |
467 | ||
9382fcee | 468 | # Now source each add-on's configure fragment. |
c80e931a RM |
469 | # The fragments can use $srcdir/$libc_add_on to find themselves, |
470 | # and test $add_ons_automatic to see if they were explicitly requested. | |
471 | # A fragment can clear (or even change) $libc_add_on to affect | |
472 | # whether it goes into the list to be actually used in the build. | |
473 | use_add_ons= | |
9382fcee | 474 | for libc_add_on in $add_ons; do |
e0a3ed4f RM |
475 | # Test whether such a directory really exists. |
476 | # It can be absolute, or relative to $srcdir, or relative to the build dir. | |
477 | case "$libc_add_on" in | |
478 | /*) | |
479 | libc_add_on_srcdir=$libc_add_on | |
480 | ;; | |
481 | *) | |
482 | test -d "$srcdir/$libc_add_on" || { | |
77e8bddf | 483 | if test -d "$libc_add_on"; then |
e0a3ed4f RM |
484 | libc_add_on="`pwd`/$libc_add_on" |
485 | else | |
486 | AC_MSG_ERROR(add-on directory \"$libc_add_on\" does not exist) | |
487 | fi | |
488 | } | |
489 | libc_add_on_srcdir=$srcdir/$libc_add_on | |
490 | ;; | |
491 | esac | |
492 | ||
493 | libc_add_on_frag=$libc_add_on_srcdir/configure | |
494 | libc_add_on_canonical= | |
7967983f | 495 | libc_add_on_config_subdirs= |
e0a3ed4f RM |
496 | if test -r "$libc_add_on_frag"; then |
497 | AC_MSG_NOTICE(running configure fragment for add-on $libc_add_on) | |
498 | libc_add_on_canonical=unknown | |
499 | libc_add_on_subdirs= | |
500 | . "$libc_add_on_frag" | |
501 | test -z "$libc_add_on" || { | |
77e8bddf | 502 | configured_add_ons="$configured_add_ons $libc_add_on" |
e0a3ed4f RM |
503 | if test "x$libc_add_on_canonical" = xunknown; then |
504 | AC_MSG_ERROR(fragment must set \$libc_add_on_canonical) | |
505 | fi | |
506 | for d in $libc_add_on_subdirs; do | |
507 | case "$libc_add_on" in | |
508 | /*) subdir_srcdir="$libc_add_on" ;; | |
509 | *) subdir_srcdir="\$(..)$libc_add_on" ;; | |
510 | esac | |
511 | case "$d" in | |
512 | .) | |
513 | d="${libc_add_on_canonical:-$libc_add_on}" | |
514 | ;; | |
515 | /*) | |
516 | subdir_srcdir="$d" | |
517 | ;; | |
518 | *) | |
519 | subdir_srcdir="$subdir_srcdir/$d" | |
520 | ;; | |
521 | esac | |
522 | d=`echo "$d" | sed 's@/*$@@;s@^.*/@@'` | |
523 | add_on_subdirs="$add_on_subdirs $d" | |
524 | test "$subdir_srcdir" = "\$(..)$d" || config_vars="$config_vars | |
525 | $d-srcdir = $subdir_srcdir" | |
526 | done | |
7967983f RM |
527 | for d in $libc_add_on_config_subdirs; do |
528 | case "$d" in | |
529 | /*) AC_MSG_ERROR(dnl | |
530 | fragment uses absolute path in \$libc_add_on_config_subdirs) ;; | |
531 | esac | |
532 | if test ! -d "$libc_add_on_srcdir/$d"; then | |
533 | AC_MSG_ERROR(fragment wants to configure missing directory $d) | |
534 | fi | |
535 | case "$libc_add_on" in | |
536 | /*) AC_MSG_ERROR(dnl | |
537 | relative path required for add-on using \$libc_add_on_config_subdirs) ;; | |
538 | esac | |
539 | subdirs="$subdirs $libc_add_on/$d" | |
540 | done | |
e0a3ed4f | 541 | } |
8f73811b | 542 | fi |
619f9448 | 543 | if test -n "$libc_add_on"; then |
10a803e0 | 544 | LIBC_PRECONFIGURE([$libc_add_on_srcdir], [add-on $libc_add_on for]) |
619f9448 RM |
545 | use_add_ons="$use_add_ons $libc_add_on" |
546 | add_ons_pfx="$add_ons_pfx $libc_add_on/" | |
e0a3ed4f RM |
547 | test -z "$libc_add_on_canonical" || |
548 | add_ons_sfx="$add_ons_sfx /$libc_add_on_canonical" | |
619f9448 | 549 | fi |
8f73811b | 550 | done |
c80e931a RM |
551 | # Use echo to strip excess whitespace. |
552 | add_ons="`echo $use_add_ons`" | |
8f73811b RM |
553 | fi |
554 | AC_SUBST(add_ons) | |
e0a3ed4f | 555 | AC_SUBST(add_on_subdirs) |
8f73811b RM |
556 | |
557 | ||
bdc8eb03 UD |
558 | ### |
559 | ### I put this here to prevent those annoying emails from people who cannot | |
560 | ### read and try to compile glibc on unsupported platforms. --drepper | |
561 | ### | |
562 | ### By using the undocumented --enable-hacker-mode option for configure | |
563 | ### one can skip this test to make the configuration not fail for unsupported | |
564 | ### platforms. | |
565 | ### | |
8f73811b | 566 | if test -z "$enable_hacker_mode" && test x"$libc_config_ok" != xyes; then |
bdc8eb03 | 567 | case "$machine-$host_os" in |
2ce4f015 | 568 | *-linux* | *-gnu*) |
bdc8eb03 UD |
569 | ;; |
570 | *) | |
571 | echo "*** The GNU C library is currently not available for this platform." | |
572 | echo "*** So far nobody cared to port it and if there is no volunteer it" | |
573 | echo "*** might never happen. So, if you have interest to see glibc on" | |
574 | echo "*** this platform visit" | |
575 | echo "*** http://www.gnu.org/software/libc/porting.html" | |
576 | echo "*** and join the group of porters" | |
577 | exit 1 | |
578 | ;; | |
579 | esac | |
580 | fi | |
581 | ||
3e239be6 JM |
582 | # Set base_machine if not set by a preconfigure fragment. |
583 | test -n "$base_machine" || base_machine=$machine | |
f0523145 | 584 | AC_SUBST(base_machine) |
28f540f4 | 585 | |
0cae3f4b MF |
586 | # For the multi-arch option we need support in the assembler & linker. |
587 | AC_CACHE_CHECK([for assembler and linker STT_GNU_IFUNC support], | |
588 | libc_cv_ld_gnu_indirect_function, [dnl | |
786b0b67 | 589 | cat > conftest.S <<EOF |
84b9230c | 590 | .type foo,%gnu_indirect_function |
0cae3f4b MF |
591 | foo: |
592 | .globl _start | |
593 | _start: | |
594 | .globl __start | |
595 | __start: | |
596 | .data | |
786b0b67 AS |
597 | #ifdef _LP64 |
598 | .quad foo | |
599 | #else | |
0cae3f4b | 600 | .long foo |
786b0b67 | 601 | #endif |
84b9230c | 602 | EOF |
0cae3f4b MF |
603 | libc_cv_ld_gnu_indirect_function=no |
604 | if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \ | |
605 | -nostartfiles -nostdlib \ | |
786b0b67 | 606 | -o conftest conftest.S 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then |
0cae3f4b MF |
607 | # Do a link to see if the backend supports IFUNC relocs. |
608 | $READELF -r conftest 1>&AS_MESSAGE_LOG_FD | |
609 | LC_ALL=C $READELF -r conftest | grep 'no relocations' >/dev/null || { | |
610 | libc_cv_ld_gnu_indirect_function=yes | |
611 | } | |
84b9230c MF |
612 | fi |
613 | rm -f conftest*]) | |
614 | ||
615 | AC_MSG_CHECKING(whether .text pseudo-op must be used) | |
616 | AC_CACHE_VAL(libc_cv_dot_text, [dnl | |
617 | cat > conftest.s <<EOF | |
618 | .text | |
619 | EOF | |
620 | libc_cv_dot_text= | |
621 | if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then | |
622 | libc_cv_dot_text=.text | |
623 | fi | |
624 | rm -f conftest*]) | |
625 | if test -z "$libc_cv_dot_text"; then | |
626 | AC_MSG_RESULT(no) | |
627 | else | |
628 | AC_MSG_RESULT(yes) | |
629 | fi | |
630 | ||
0cae3f4b | 631 | if test x"$libc_cv_ld_gnu_indirect_function" != xyes; then |
84b9230c MF |
632 | if test x"$multi_arch" = xyes; then |
633 | AC_MSG_ERROR([--enable-multi-arch support requires assembler and linker support]) | |
634 | else | |
635 | multi_arch=no | |
636 | fi | |
637 | fi | |
6270516e | 638 | multi_arch_d= |
84b9230c MF |
639 | if test x"$multi_arch" != xno; then |
640 | multi_arch_d=/multiarch | |
641 | fi | |
642 | ||
f0523145 | 643 | # Compute the list of sysdep directories for this configuration. |
f332db02 | 644 | # This can take a while to compute. |
f0523145 | 645 | sysdep_dir=$srcdir/sysdeps |
f332db02 | 646 | AC_MSG_CHECKING(sysdep dirs) |
f0523145 RM |
647 | dnl We need to use [ and ] for other purposes for a while now. |
648 | changequote(,)dnl | |
28f540f4 RM |
649 | # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1. |
650 | os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`" | |
651 | ||
b22d21b3 | 652 | test "x$base_os" != x || case "$os" in |
28f540f4 RM |
653 | gnu*) |
654 | base_os=mach/hurd ;; | |
2ce4f015 | 655 | linux*) |
28f540f4 | 656 | base_os=unix/sysv ;; |
28f540f4 RM |
657 | esac |
658 | ||
659 | # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos. | |
660 | tail=$os | |
661 | ostry=$os | |
662 | while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do | |
663 | ostry="$ostry /$o" | |
664 | tail=$o | |
75914335 | 665 | done |
28f540f4 RM |
666 | o=`echo $tail | sed 's/[0-9]*$//'` |
667 | if test $o != $tail; then | |
668 | ostry="$ostry /$o" | |
669 | fi | |
ec4b0518 UD |
670 | # For linux-gnu, try linux-gnu, then linux. |
671 | o=`echo $tail | sed 's/-.*$//'` | |
672 | if test $o != $tail; then | |
673 | ostry="$ostry /$o" | |
674 | fi | |
28f540f4 RM |
675 | |
676 | # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix. | |
677 | base= | |
678 | tail=$base_os | |
679 | while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do | |
680 | set $b | |
681 | base="$base /$1" | |
682 | tail="$2" | |
683 | done | |
684 | ||
ae6b8730 | 685 | # For sparc/sparc32, try sparc/sparc32 and then sparc. |
28f540f4 | 686 | mach= |
2ceaa76a | 687 | tail=$machine${submachine:+/$submachine} |
28f540f4 RM |
688 | while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do |
689 | set $m | |
10ceac89 RM |
690 | # Prepend the machine's FPU directory unless --without-fp. |
691 | if test "$with_fp" = yes; then | |
6270516e | 692 | maybe_fpu=/fpu |
f4b07664 | 693 | else |
6270516e | 694 | maybe_fpu=/nofpu |
82d00cab | 695 | fi |
6270516e RM |
696 | # For each machine term, try it with and then without /multiarch. |
697 | for try_fpu in $maybe_fpu ''; do | |
698 | for try_multi in $multi_arch_d ''; do | |
699 | mach="$mach /$1$try_fpu$try_multi" | |
700 | done | |
701 | done | |
28f540f4 RM |
702 | tail="$2" |
703 | done | |
704 | ||
705 | dnl We are done with glob and regexp uses of [ and ]; return to autoconf. | |
706 | changequote([,])dnl | |
707 | ||
708 | # Find what sysdep directories exist. | |
e0a3ed4f | 709 | sysnames_add_ons= |
28f540f4 | 710 | sysnames= |
4b69abad RM |
711 | for b in $base ''; do |
712 | for m0 in $mach ''; do | |
713 | for v in /$vendor ''; do | |
714 | test "$v" = / && continue | |
715 | for o in /$ostry ''; do | |
716 | test "$o" = / && continue | |
6270516e | 717 | for m in $mach ''; do |
4b69abad | 718 | for d in $add_ons_pfx ''; do |
8f73811b | 719 | for a in $add_ons_sfx ''; do |
1c9f1a02 RM |
720 | try_suffix="$m0$b$v$o$m" |
721 | if test -n "$try_suffix"; then | |
77e8bddf AS |
722 | try_srcdir="${srcdir}/" |
723 | case "$d" in | |
e0a3ed4f RM |
724 | /*) try_srcdir= ;; |
725 | esac | |
1c9f1a02 | 726 | try="${d}sysdeps$try_suffix$a" |
8f73811b RM |
727 | test -n "$enable_debug_configure" && |
728 | echo "$0 [DEBUG]: try $try" >&2 | |
e0a3ed4f | 729 | if test -d "$try_srcdir$try"; then |
8f73811b RM |
730 | sysnames="$sysnames $try" |
731 | { test -n "$o" || test -n "$b"; } && os_used=t | |
732 | { test -n "$m" || test -n "$m0"; } && machine_used=t | |
4b69abad RM |
733 | case x${m0:-$m} in |
734 | x*/$submachine) submachine_used=t ;; | |
735 | esac | |
e0a3ed4f RM |
736 | if test -n "$d"; then |
737 | case "$sysnames_add_ons" in | |
738 | *" $d "*) ;; | |
739 | *|'') sysnames_add_ons="$sysnames_add_ons $d" ;; | |
740 | esac | |
741 | fi | |
8f73811b | 742 | fi |
57ba7bb4 | 743 | fi |
8f73811b | 744 | done |
57ba7bb4 | 745 | done |
28f540f4 RM |
746 | done |
747 | done | |
748 | done | |
749 | done | |
4b69abad | 750 | done |
28f540f4 | 751 | |
6f89d2f3 L |
752 | # If the assembler supports gnu_indirect_function symbol type and the |
753 | # architecture supports multi-arch, we enable multi-arch by default. | |
84b9230c MF |
754 | case $sysnames_add_ons$sysnames in |
755 | *"$multi_arch_d"*) | |
756 | ;; | |
757 | *) | |
77e8bddf | 758 | test x"$multi_arch" = xdefault && multi_arch=no |
84b9230c MF |
759 | ;; |
760 | esac | |
761 | if test x"$multi_arch" != xno; then | |
6f89d2f3 L |
762 | AC_DEFINE(USE_MULTIARCH) |
763 | fi | |
764 | AC_SUBST(multi_arch) | |
765 | ||
28f540f4 RM |
766 | if test -z "$os_used" && test "$os" != none; then |
767 | AC_MSG_ERROR(Operating system $os is not supported.) | |
768 | fi | |
769 | if test -z "$machine_used" && test "$machine" != none; then | |
770 | AC_MSG_ERROR(The $machine is not supported.) | |
771 | fi | |
2ceaa76a RM |
772 | if test -z "$submachine_used" && test -n "$submachine"; then |
773 | AC_MSG_ERROR(The $submachine subspecies of $host_cpu is not supported.) | |
774 | fi | |
775 | AC_SUBST(submachine) | |
28f540f4 RM |
776 | |
777 | # We have now validated the configuration. | |
778 | ||
28f540f4 RM |
779 | # Expand the list of system names into a full list of directories |
780 | # from each element's parent name and Implies file (if present). | |
781 | set $sysnames | |
e50ec9f9 | 782 | names= |
28f540f4 RM |
783 | while test $# -gt 0; do |
784 | name=$1 | |
785 | shift | |
786 | ||
e50ec9f9 | 787 | case " $names " in *" $name "*) |
f332db02 RM |
788 | # Already in the list. |
789 | continue | |
e50ec9f9 | 790 | esac |
f332db02 RM |
791 | |
792 | # Report each name as we discover it, so there is no long pause in output. | |
0b4ee387 | 793 | echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD |
f332db02 | 794 | |
57ba7bb4 UD |
795 | name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'` |
796 | ||
797 | case $name in | |
798 | /*) xsrcdir= ;; | |
799 | *) xsrcdir=$srcdir/ ;; | |
800 | esac | |
801 | test -n "$enable_debug_configure" && | |
802 | echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2 | |
803 | ||
ba75122d RM |
804 | for implies_file in Implies Implies-before Implies-after; do |
805 | implies_type=`echo $implies_file | sed s/-/_/` | |
806 | eval ${implies_type}= | |
807 | if test -f $xsrcdir$name/$implies_file; then | |
808 | # Collect more names from the `Implies' file (removing comments). | |
809 | implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/$implies_file`" | |
810 | for x in $implied_candidate; do | |
811 | found=no | |
812 | if test -d $xsrcdir$name_base/$x; then | |
813 | eval "${implies_type}=\"\$${implies_type} \$name_base/\$x\"" | |
636ccfc8 | 814 | found=yes |
ba75122d RM |
815 | fi |
816 | for d in $add_ons_pfx ''; do | |
817 | try="${d}sysdeps/$x" | |
818 | case $d in | |
819 | /*) try_srcdir= ;; | |
820 | *) try_srcdir=$srcdir/ ;; | |
e0a3ed4f | 821 | esac |
ba75122d RM |
822 | test -n "$enable_debug_configure" && |
823 | echo "[DEBUG]: $name $implies_file $x try($d) {$try_srcdir}$try" >&2 | |
824 | if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try; | |
825 | then | |
826 | eval "${implies_type}=\"\$${implies_type} \$try\"" | |
827 | found=yes | |
828 | case "$sysnames_add_ons" in | |
829 | *" $d "*) ;; | |
830 | *|'') sysnames_add_ons="$sysnames_add_ons $d" ;; | |
831 | esac | |
832 | fi | |
833 | done | |
834 | if test $found = no; then | |
835 | AC_MSG_WARN($name/$implies_file specifies nonexistent $x) | |
636ccfc8 UD |
836 | fi |
837 | done | |
ba75122d RM |
838 | fi |
839 | done | |
28f540f4 RM |
840 | |
841 | # Add NAME to the list of names. | |
842 | names="$names $name" | |
843 | ||
844 | # Find the parent of NAME, using the empty string if it has none. | |
845 | changequote(,)dnl | |
57ba7bb4 | 846 | parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`" |
28f540f4 RM |
847 | changequote([,])dnl |
848 | ||
ba75122d RM |
849 | test -n "$enable_debug_configure" && |
850 | echo "[DEBUG]: $name Implies='$Implies' rest='$*' parent='$parent' \ | |
57633811 | 851 | Implies_before='$Implies_before' Implies_after='$Implies_after'" >&2 |
ba75122d | 852 | |
28f540f4 RM |
853 | # Add the names implied by NAME, and NAME's parent (if it has one), to |
854 | # the list of names to be processed (the argument list). We prepend the | |
855 | # implied names to the list and append the parent. We want implied | |
856 | # directories to come before further directories inferred from the | |
857 | # configuration components; this ensures that for sysv4, unix/common | |
858 | # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*) | |
859 | # after sysv4). | |
ba75122d | 860 | sysnames="`echo $Implies $* $Implies_before $parent $Implies_after`" |
28f540f4 RM |
861 | test -n "$sysnames" && set $sysnames |
862 | done | |
863 | ||
864 | # Add the default directories. | |
83ef87ba | 865 | default_sysnames="sysdeps/generic" |
ecdc196c | 866 | sysnames="$names $default_sysnames" |
f332db02 RM |
867 | AC_SUBST(sysnames) |
868 | # The other names were emitted during the scan. | |
ecdc196c | 869 | AC_MSG_RESULT($default_sysnames) |
28f540f4 | 870 | |
e0a3ed4f RM |
871 | # Collect the list of add-ons that supply partial sysdeps trees. |
872 | sysdeps_add_ons= | |
873 | for add_on in $add_ons; do | |
874 | case "$add_on" in | |
875 | /*) xsrcdir= ;; | |
876 | *) xsrcdir="$srcdir/" ;; | |
877 | esac | |
878 | ||
879 | test -d "$xsrcdir$add_on/sysdeps" || { | |
880 | case "$configured_add_ons " in | |
881 | *" $add_on "*) ;; | |
882 | *|'') | |
883 | AC_MSG_ERROR(add-on $add_on has no configure fragment or sysdeps tree) | |
884 | ;; | |
885 | esac | |
886 | continue | |
887 | } | |
888 | ||
889 | sysdeps_add_ons="$sysdeps_add_ons $add_on" | |
890 | case "$sysnames_add_ons" in | |
891 | *" $add_on/ "*) ;; | |
892 | *|'') | |
893 | AC_MSG_WARN(add-on $add_on contributed no sysdeps directories) | |
894 | continue ;; | |
895 | esac | |
896 | ||
897 | found=no | |
898 | for d in $sysnames; do | |
899 | case "$d" in | |
900 | $add_on/sysdeps/*) ;; | |
901 | *) continue ;; | |
902 | esac | |
903 | (cd "$xsrcdir$d" && for f in *[[!~]]; do | |
904 | case "$f" in | |
905 | sys|bits) | |
906 | for ff in $f/*.h; do | |
907 | test -d "$ff" || { test -e "$ff" && exit 88; } | |
908 | done | |
909 | ;; | |
910 | *) | |
77e8bddf | 911 | test -d "$f" || { test -e "$f" && exit 88; } |
e0a3ed4f RM |
912 | ;; |
913 | esac | |
914 | done) | |
915 | if test $? -eq 88; then | |
916 | found=yes | |
917 | break | |
918 | fi | |
919 | done | |
920 | if test $found = no; then | |
921 | AC_MSG_WARN(add-on $add_on contributed no useful sysdeps directories) | |
922 | fi | |
923 | done | |
924 | AC_SUBST(sysdeps_add_ons) | |
925 | ||
f332db02 RM |
926 | |
927 | ### Locate tools. | |
28f540f4 | 928 | |
28f540f4 | 929 | AC_PROG_INSTALL |
2b80a372 | 930 | if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then |
28f540f4 | 931 | # The makefiles need to use a different form to find it in $srcdir. |
2b80a372 | 932 | INSTALL='\$(..)./scripts/install-sh -c' |
28f540f4 | 933 | fi |
0e3426bb | 934 | AC_PROG_LN_S |
ae828bc6 | 935 | |
4baa087a | 936 | LIBC_PROG_BINUTILS |
4baa087a | 937 | |
bd805071 | 938 | # Accept binutils 2.22 or newer. |
4baa087a RM |
939 | AC_CHECK_PROG_VER(AS, $AS, --version, |
940 | [GNU assembler.* \([0-9]*\.[0-9.]*\)], | |
bd805071 AS |
941 | [2.1[0-9][0-9]*|2.2[2-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*], |
942 | AS=: critic_missing="$critic_missing as") | |
4baa087a RM |
943 | AC_CHECK_PROG_VER(LD, $LD, --version, |
944 | [GNU ld.* \([0-9][0-9]*\.[0-9.]*\)], | |
bd805071 AS |
945 | [2.1[0-9][0-9]*|2.2[2-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*], |
946 | LD=: critic_missing="$critic_missing ld") | |
4baa087a | 947 | |
63bda0c1 | 948 | # These programs are version sensitive. |
3a12e572 | 949 | AC_CHECK_TOOL_PREFIX |
22e65f8f | 950 | AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version, |
8fc1e2ca | 951 | [GNU Make[^0-9]*\([0-9][0-9.]*\)], |
28d708c4 | 952 | [3.79* | 3.[89]* | [4-9].* | [1-9][0-9]*], critic_missing="$critic_missing make") |
63bda0c1 | 953 | |
22e65f8f | 954 | AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version, |
bdd421cc | 955 | [GNU gettext.* \([0-9]*\.[0-9.]*\)], |
aefdff34 RM |
956 | [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*], |
957 | MSGFMT=: aux_missing="$aux_missing msgfmt") | |
63bda0c1 | 958 | AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version, |
8b7fb588 | 959 | [GNU texinfo.* \([0-9][0-9.]*\)], |
3a12c70f | 960 | [4.[7-9]*|4.[1-9][0-9]*|[5-9].*], |
aefdff34 | 961 | MAKEINFO=: aux_missing="$aux_missing makeinfo") |
d6a97a28 | 962 | AC_CHECK_PROG_VER(SED, sed, --version, |
07e51550 | 963 | [GNU sed[^0-9]* \([0-9]*\.[0-9.]*\)], |
aefdff34 RM |
964 | [3.0[2-9]*|3.[1-9]*|[4-9]*], |
965 | SED=: aux_missing="$aux_missing sed") | |
0786794f AM |
966 | AC_CHECK_PROG_VER(AWK, gawk, --version, |
967 | [GNU Awk[^0-9]*\([0-9][0-9.]*\)], | |
12086fb4 | 968 | [3.1.[2-9]*|3.[2-9]*|[4-9]*], critic_missing="$critic_missing gawk") |
63bda0c1 | 969 | |
461a7b1e RM |
970 | AC_CACHE_CHECK([if $CC is sufficient to build libc], libc_cv_compiler_ok, [ |
971 | AC_TRY_COMPILE([], [ | |
4863355a | 972 | #if !defined __GNUC__ || __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 6) |
461a7b1e RM |
973 | #error insufficient compiler |
974 | #endif], | |
975 | [libc_cv_compiler_ok=yes], | |
976 | [libc_cv_compiler_ok=no])]) | |
977 | AS_IF([test $libc_cv_compiler_ok != yes], | |
978 | [critic_missing="$critic_missing compiler"]) | |
979 | ||
30b99d79 | 980 | AC_CHECK_TOOL(NM, nm, false) |
d30cf5bb | 981 | |
8894bad3 AM |
982 | if test "x$maintainer" = "xyes"; then |
983 | AC_CHECK_PROGS(AUTOCONF, autoconf, no) | |
984 | case "x$AUTOCONF" in | |
985 | xno|x|x:) AUTOCONF=no ;; | |
986 | *) | |
987 | AC_CACHE_CHECK(dnl | |
988 | whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl | |
989 | if (cd $srcdir; $AUTOCONF $ACFLAGS configure.ac > /dev/null 2>&1); then | |
990 | libc_cv_autoconf_works=yes | |
991 | else | |
992 | libc_cv_autoconf_works=no | |
993 | fi]) | |
994 | test $libc_cv_autoconf_works = yes || AUTOCONF=no | |
995 | ;; | |
996 | esac | |
997 | if test "x$AUTOCONF" = xno; then | |
998 | aux_missing="$aux_missing autoconf" | |
999 | fi | |
9e8ac24b AM |
1000 | else |
1001 | AUTOCONF=no | |
14519931 | 1002 | fi |
1400de2e | 1003 | |
32a448ed RM |
1004 | test -n "$critic_missing" && AC_MSG_ERROR([ |
1005 | *** These critical programs are missing or too old:$critic_missing | |
1006 | *** Check the INSTALL file for required versions.]) | |
1007 | ||
4bca4c17 | 1008 | test -n "$aux_missing" && AC_MSG_WARN([ |
9c6fffc0 | 1009 | *** These auxiliary programs are missing or incompatible versions:$aux_missing |
63bda0c1 UD |
1010 | *** some features will be disabled. |
1011 | *** Check the INSTALL file for required versions.]) | |
28f540f4 | 1012 | |
dbe7a0f5 UD |
1013 | # if using special system headers, find out the compiler's sekrit |
1014 | # header directory and add that to the list. NOTE: Only does the right | |
1015 | # thing on a system that doesn't need fixincludes. (Not presently a problem.) | |
1016 | if test -n "$sysheaders"; then | |
67fbfa5c RM |
1017 | SYSINCLUDES=-nostdinc |
1018 | for d in include include-fixed; do | |
1019 | i=`$CC -print-file-name="$d"` && test "x$i" != x && test "x$i" != "x$d" && | |
1020 | SYSINCLUDES="$SYSINCLUDES -isystem $i" | |
1021 | done | |
1022 | SYSINCLUDES="$SYSINCLUDES \ | |
3d6ce23a | 1023 | -isystem `echo $sysheaders | sed 's/:/ -isystem /g'`" |
ef226fec | 1024 | if test -n "$CXX"; then |
7872cfb0 | 1025 | CXX_SYSINCLUDES= |
67060746 AC |
1026 | for cxxheaders in `$CXX -v -S -x c++ /dev/null -o /dev/null 2>&1 \ |
1027 | | sed -n -e '1,/#include/d' -e 's/^ \(\/.*\/[cg]++\)/\1/p'`; do | |
1028 | test "x$cxxheaders" != x && | |
1029 | CXX_SYSINCLUDES="$CXX_SYSINCLUDES -isystem $cxxheaders" | |
1030 | done | |
ef226fec | 1031 | fi |
dbe7a0f5 UD |
1032 | fi |
1033 | AC_SUBST(SYSINCLUDES) | |
ef226fec | 1034 | AC_SUBST(CXX_SYSINCLUDES) |
dbe7a0f5 | 1035 | |
3911660e UD |
1036 | # Test if LD_LIBRARY_PATH contains the notation for the current directory |
1037 | # since this would lead to problems installing/building glibc. | |
1038 | # LD_LIBRARY_PATH contains the current directory if one of the following | |
1039 | # is true: | |
1040 | # - one of the terminals (":" and ";") is the first or last sign | |
1041 | # - two terminals occur directly after each other | |
1042 | # - the path contains an element with a dot in it | |
1043 | AC_MSG_CHECKING(LD_LIBRARY_PATH variable) | |
1044 | changequote(,)dnl | |
1045 | case ${LD_LIBRARY_PATH} in | |
1046 | [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* ) | |
b3a86ae1 | 1047 | ld_library_path_setting="contains current directory" |
3911660e UD |
1048 | ;; |
1049 | *) | |
1050 | ld_library_path_setting="ok" | |
1051 | ;; | |
1052 | esac | |
1053 | changequote([,])dnl | |
1054 | AC_MSG_RESULT($ld_library_path_setting) | |
1055 | if test "$ld_library_path_setting" != "ok"; then | |
63bda0c1 UD |
1056 | AC_MSG_ERROR([ |
1057 | *** LD_LIBRARY_PATH shouldn't contain the current directory when | |
1058 | *** building glibc. Please change the environment variable | |
1059 | *** and run configure again.]) | |
3911660e | 1060 | fi |
8e31cf7e | 1061 | |
74bd2300 | 1062 | AC_CACHE_CHECK(whether GCC supports -static-libgcc, libc_cv_gcc_static_libgcc, [dnl |
8175a253 | 1063 | if $CC -v -static-libgcc 2>&1 | grep 'unrecognized option.*static-libgcc' >/dev/null; then |
74bd2300 UD |
1064 | libc_cv_gcc_static_libgcc= |
1065 | else | |
1066 | libc_cv_gcc_static_libgcc=-static-libgcc | |
1067 | fi]) | |
1068 | AC_SUBST(libc_cv_gcc_static_libgcc) | |
1069 | ||
26f56c1c | 1070 | AC_PATH_PROG(BASH_SHELL, bash, no) |
84384f5b | 1071 | |
c0016081 | 1072 | AC_PATH_PROG(PERL, perl, no) |
2fd5d029 RM |
1073 | if test "$PERL" != no && |
1074 | (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then | |
1075 | PERL=no | |
ecb06196 | 1076 | fi |
2f512715 AS |
1077 | AC_PATH_PROG(INSTALL_INFO, install-info, no, |
1078 | $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin) | |
cc8623f1 WN |
1079 | AC_CHECK_PROG_VER(BISON, bison, --version, |
1080 | [bison (GNU Bison) \([0-9]*\.[0-9.]*\)], | |
1081 | [2.7*|[3-9].*|[1-9][0-9]*], | |
1082 | BISON=no) | |
2de00372 | 1083 | |
b8dc6a10 | 1084 | AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl |
28f540f4 RM |
1085 | AC_TRY_COMPILE(dnl |
1086 | [#define __need_size_t | |
1087 | #define __need_wchar_t | |
1088 | #include <stddef.h> | |
1089 | #define __need_NULL | |
1090 | #include <stddef.h>], [size_t size; wchar_t wchar; | |
1091 | #ifdef offsetof | |
1092 | #error stddef.h ignored __need_* | |
1093 | #endif | |
1094 | if (&size == NULL || &wchar == NULL) abort ();], | |
77e8bddf AS |
1095 | libc_cv_friendly_stddef=yes, |
1096 | libc_cv_friendly_stddef=no)]) | |
28f540f4 RM |
1097 | if test $libc_cv_friendly_stddef = yes; then |
1098 | config_vars="$config_vars | |
1099 | override stddef.h = # The installed <stddef.h> seems to be libc-friendly." | |
1100 | fi | |
1101 | ||
b8dc6a10 RM |
1102 | AC_CACHE_CHECK(whether we need to use -P to assemble .S files, |
1103 | libc_cv_need_minus_P, [dnl | |
28f540f4 RM |
1104 | cat > conftest.S <<EOF |
1105 | #include "confdefs.h" | |
1106 | /* Nothing whatsoever. */ | |
1107 | EOF | |
3217788f | 1108 | if AC_TRY_COMMAND(${CC-cc} $CPPFLAGS $ASFLAGS -c conftest.S 1>&AS_MESSAGE_LOG_FD); then |
28f540f4 RM |
1109 | libc_cv_need_minus_P=no |
1110 | else | |
1111 | libc_cv_need_minus_P=yes | |
1112 | fi | |
1113 | rm -f conftest*]) | |
28f540f4 RM |
1114 | if test $libc_cv_need_minus_P = yes; then |
1115 | config_vars="$config_vars | |
1116 | asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives." | |
1117 | fi | |
1118 | ||
b8dc6a10 | 1119 | AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl |
9a70fcab | 1120 | cat > conftest.s <<EOF |
2293395f | 1121 | ${libc_cv_dot_text} |
ae1025be | 1122 | foo: |
df2a0c93 | 1123 | .set glibc_conftest_frobozz,foo |
7b8e0d49 | 1124 | .globl glibc_conftest_frobozz |
e215c478 | 1125 | EOF |
df2a0c93 RM |
1126 | # The alpha-dec-osf1 assembler gives only a warning for `.set' |
1127 | # (but it doesn't work), so we must do a linking check to be sure. | |
1128 | cat > conftest1.c <<\EOF | |
1129 | extern int glibc_conftest_frobozz; | |
640f0119 | 1130 | void _start() { glibc_conftest_frobozz = 1; } |
df2a0c93 RM |
1131 | EOF |
1132 | if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \ | |
640f0119 | 1133 | -nostartfiles -nostdlib \ |
0b4ee387 | 1134 | -o conftest conftest.s conftest1.c 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then |
e215c478 RM |
1135 | libc_cv_asm_set_directive=yes |
1136 | else | |
1137 | libc_cv_asm_set_directive=no | |
1138 | fi | |
65b3cbcb | 1139 | rm -f conftest*]) |
e215c478 RM |
1140 | if test $libc_cv_asm_set_directive = yes; then |
1141 | AC_DEFINE(HAVE_ASM_SET_DIRECTIVE) | |
1142 | fi | |
1143 | ||
415ac3df UD |
1144 | AC_CACHE_CHECK(for assembler gnu_unique_object symbol type, |
1145 | libc_cv_asm_unique_object, [dnl | |
1146 | cat > conftest.s <<EOF | |
1147 | ${libc_cv_dot_text} | |
1148 | _sym: | |
b67e9372 | 1149 | .type _sym, %gnu_unique_object |
415ac3df UD |
1150 | EOF |
1151 | if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then | |
1152 | libc_cv_asm_unique_object=yes | |
1153 | else | |
1154 | libc_cv_asm_unique_object=no | |
1155 | fi | |
1156 | rm -f conftest*]) | |
1157 | if test $libc_cv_asm_unique_object = yes; then | |
1158 | AC_DEFINE(HAVE_ASM_UNIQUE_OBJECT) | |
1159 | fi | |
1160 | ||
a0da5fe1 UD |
1161 | AC_CACHE_CHECK(for .previous assembler directive, |
1162 | libc_cv_asm_previous_directive, [dnl | |
1163 | cat > conftest.s <<EOF | |
fd26970f UD |
1164 | .section foo_section |
1165 | .previous | |
a0da5fe1 UD |
1166 | EOF |
1167 | if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then | |
1168 | libc_cv_asm_previous_directive=yes | |
1169 | else | |
1170 | libc_cv_asm_previous_directive=no | |
1171 | fi | |
1172 | rm -f conftest*]) | |
1173 | if test $libc_cv_asm_previous_directive = yes; then | |
1174 | AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE) | |
1175 | else | |
1176 | AC_CACHE_CHECK(for .popsection assembler directive, | |
1177 | libc_cv_asm_popsection_directive, [dnl | |
1178 | cat > conftest.s <<EOF | |
1179 | .pushsection foo_section | |
1180 | .popsection | |
fd26970f | 1181 | EOF |
3217788f | 1182 | if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then |
a0da5fe1 | 1183 | libc_cv_asm_popsection_directive=yes |
fd26970f | 1184 | else |
a0da5fe1 | 1185 | libc_cv_asm_popsection_directive=no |
fd26970f UD |
1186 | fi |
1187 | rm -f conftest*]) | |
a0da5fe1 UD |
1188 | if test $libc_cv_asm_popsection_directive = yes; then |
1189 | AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE) | |
fd26970f | 1190 | fi |
a0da5fe1 UD |
1191 | fi |
1192 | AC_CACHE_CHECK(for .protected and .hidden assembler directive, | |
1193 | libc_cv_asm_protected_directive, [dnl | |
1194 | cat > conftest.s <<EOF | |
2d499f55 UD |
1195 | .protected foo |
1196 | foo: | |
1197 | .hidden bar | |
1198 | bar: | |
1199 | EOF | |
a0da5fe1 UD |
1200 | if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then |
1201 | libc_cv_asm_protected_directive=yes | |
1202 | else | |
1203 | AC_MSG_ERROR(assembler support for symbol visibility is required) | |
1204 | fi | |
1205 | rm -f conftest*]) | |
0fb7851f | 1206 | |
a0da5fe1 UD |
1207 | if test $libc_cv_asm_protected_directive = yes; then |
1208 | AC_CACHE_CHECK(whether __attribute__((visibility())) is supported, | |
0d01dace UD |
1209 | libc_cv_visibility_attribute, |
1210 | [cat > conftest.c <<EOF | |
1211 | int foo __attribute__ ((visibility ("hidden"))) = 1; | |
1212 | int bar __attribute__ ((visibility ("protected"))) = 1; | |
1213 | EOF | |
1214 | libc_cv_visibility_attribute=no | |
61cea1c3 | 1215 | if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then |
0d01dace UD |
1216 | if grep '\.hidden.*foo' conftest.s >/dev/null; then |
1217 | if grep '\.protected.*bar' conftest.s >/dev/null; then | |
1218 | libc_cv_visibility_attribute=yes | |
1219 | fi | |
1220 | fi | |
1221 | fi | |
f7d82dc9 | 1222 | rm -f conftest.{c,s} |
0d01dace | 1223 | ]) |
a0da5fe1 UD |
1224 | if test $libc_cv_visibility_attribute != yes; then |
1225 | AC_MSG_ERROR(compiler support for visibility attribute is required) | |
0d01dace | 1226 | fi |
a0da5fe1 | 1227 | fi |
0d01dace | 1228 | |
83569fb8 L |
1229 | if test $libc_cv_visibility_attribute = yes; then |
1230 | AC_CACHE_CHECK(linker support for protected data symbol, | |
1231 | libc_cv_protected_data, | |
1232 | [cat > conftest.c <<EOF | |
1233 | int bar __attribute__ ((visibility ("protected"))) = 1; | |
1234 | EOF | |
1235 | libc_cv_protected_data=no | |
1236 | if AC_TRY_COMMAND(${CC-cc} -nostdlib -nostartfiles -fPIC -shared conftest.c -o conftest.so); then | |
1237 | cat > conftest.c <<EOF | |
1238 | extern int bar; | |
1239 | int main (void) { return bar; } | |
1240 | EOF | |
1241 | if AC_TRY_COMMAND(${CC-cc} -nostdlib -nostartfiles conftest.c -o conftest conftest.so); then | |
1242 | libc_cv_protected_data=yes | |
1243 | fi | |
1244 | fi | |
1245 | rm -f conftest.* | |
1246 | ]) | |
1247 | else | |
1248 | libc_cv_protected_data=no | |
1249 | fi | |
1250 | AC_SUBST(libc_cv_protected_data) | |
1251 | ||
a0da5fe1 UD |
1252 | if test $libc_cv_visibility_attribute = yes; then |
1253 | AC_CACHE_CHECK(for broken __attribute__((visibility())), | |
37ba7d66 UD |
1254 | libc_cv_broken_visibility_attribute, |
1255 | [cat > conftest.c <<EOF | |
1256 | int foo (int x); | |
1257 | int bar (int x) __asm__ ("foo") __attribute__ ((visibility ("hidden"))); | |
1258 | int bar (int x) { return x; } | |
1259 | EOF | |
1260 | libc_cv_broken_visibility_attribute=yes | |
f7d82dc9 | 1261 | if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then |
37ba7d66 UD |
1262 | changequote(,)dnl |
1263 | if grep '\.hidden[ _]foo' conftest.s >/dev/null; then | |
1264 | changequote([,])dnl | |
1265 | libc_cv_broken_visibility_attribute=no | |
1266 | fi | |
1267 | fi | |
1268 | rm -f conftest.c conftest.s | |
1269 | ]) | |
a0da5fe1 UD |
1270 | if test $libc_cv_broken_visibility_attribute = yes; then |
1271 | AC_MSG_ERROR(working compiler support for visibility attribute is required) | |
37ba7d66 | 1272 | fi |
a0da5fe1 | 1273 | fi |
37ba7d66 | 1274 | |
a0da5fe1 UD |
1275 | AC_CACHE_CHECK(for broken __attribute__((alias())), |
1276 | libc_cv_broken_alias_attribute, | |
1277 | [cat > conftest.c <<EOF | |
1278 | extern int foo (int x) __asm ("xyzzy"); | |
1279 | int bar (int x) { return x; } | |
1280 | extern __typeof (bar) foo __attribute ((weak, alias ("bar"))); | |
1281 | extern int dfoo; | |
1282 | extern __typeof (dfoo) dfoo __asm ("abccb"); | |
1283 | int dfoo = 1; | |
37ba7d66 | 1284 | EOF |
a0da5fe1 UD |
1285 | libc_cv_broken_alias_attribute=yes |
1286 | if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then | |
1287 | if grep 'xyzzy' conftest.s >/dev/null && | |
1288 | grep 'abccb' conftest.s >/dev/null; then | |
1289 | libc_cv_broken_alias_attribute=no | |
1290 | fi | |
1291 | fi | |
1292 | rm -f conftest.c conftest.s | |
1293 | ]) | |
1294 | if test $libc_cv_broken_alias_attribute = yes; then | |
1295 | AC_MSG_ERROR(working alias attribute support required) | |
1296 | fi | |
1297 | ||
1298 | if test $libc_cv_visibility_attribute = yes; then | |
1299 | AC_CACHE_CHECK(whether to put _rtld_local into .sdata section, | |
0d01dace UD |
1300 | libc_cv_have_sdata_section, |
1301 | [echo "int i;" > conftest.c | |
1302 | libc_cv_have_sdata_section=no | |
dbc92dc6 | 1303 | if ${CC-cc} $LDFLAGS -fPIC -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \ |
0d01dace UD |
1304 | | grep '\.sdata' >/dev/null; then |
1305 | libc_cv_have_sdata_section=yes | |
1306 | fi | |
1307 | rm -f conftest.c conftest.so | |
1308 | ]) | |
a0da5fe1 UD |
1309 | if test $libc_cv_have_sdata_section = yes; then |
1310 | AC_DEFINE(HAVE_SDATA_SECTION) | |
0d01dace | 1311 | fi |
a0da5fe1 | 1312 | fi |
0d01dace | 1313 | |
a0da5fe1 UD |
1314 | AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support, |
1315 | libc_cv_initfini_array, [dnl | |
07037eeb | 1316 | LIBC_TRY_LINK_STATIC([ |
5241882c | 1317 | int foo (void) { return 1; } |
2c617417 | 1318 | int (*fp) (void) __attribute__ ((section (".init_array"))) = foo; |
07037eeb JM |
1319 | ], |
1320 | [if $READELF -S conftest | fgrep INIT_ARRAY > /dev/null; then | |
a0da5fe1 | 1321 | libc_cv_initfini_array=yes |
5241882c | 1322 | else |
ce33ee7c | 1323 | libc_cv_initfini_array=no |
07037eeb JM |
1324 | fi], |
1325 | [libc_cv_initfini_array=no]) | |
1326 | ]) | |
a0da5fe1 UD |
1327 | if test $libc_cv_initfini_array != yes; then |
1328 | AC_MSG_ERROR([Need linker with .init_array/.fini_array support.]) | |
1329 | fi | |
62bede13 | 1330 | |
a0da5fe1 UD |
1331 | AC_CACHE_CHECK(whether to use .ctors/.dtors header and trailer, |
1332 | libc_cv_ctors_header, [dnl | |
1333 | libc_cv_ctors_header=yes | |
07037eeb JM |
1334 | LIBC_TRY_LINK_STATIC([ |
1335 | __attribute__ ((constructor)) void ctor (void) { asm (""); } | |
1336 | __attribute__ ((destructor)) void dtor (void) { asm (""); } | |
113ddea4 | 1337 | ], |
a0da5fe1 | 1338 | [dnl |
113ddea4 | 1339 | AS_IF([$READELF -WS conftest$ac_exeext | $AWK ' |
92963737 | 1340 | { gsub(/\@<:@ */, "@<:@") } |
113ddea4 RM |
1341 | $2 == ".ctors" || $2 == ".dtors" { |
1342 | size = strtonum("0x" $6) | |
1343 | align = strtonum("0x" $NF) | |
1344 | seen@<:@$2@:>@ = 1 | |
1345 | stub@<:@$2@:>@ = size == align * 2 | |
92963737 | 1346 | } |
113ddea4 RM |
1347 | END { |
1348 | ctors_ok = !seen@<:@".ctors"@:>@ || stub@<:@".ctors"@:>@ | |
1349 | dtors_ok = !seen@<:@".dtors"@:>@ || stub@<:@".dtors"@:>@ | |
1350 | exit ((ctors_ok && dtors_ok) ? 0 : 1) | |
1351 | } | |
1352 | '], [libc_cv_ctors_header=no]) | |
1353 | ], [dnl | |
1354 | AC_MSG_ERROR([missing __attribute__ ((constructor)) support??]) | |
1355 | ]) | |
a0da5fe1 UD |
1356 | ]) |
1357 | if test $libc_cv_ctors_header = no; then | |
1358 | AC_DEFINE(NO_CTORS_DTORS_SECTIONS) | |
1359 | fi | |
5241882c | 1360 | |
a0da5fe1 UD |
1361 | AC_CACHE_CHECK(for libunwind-support in compiler, |
1362 | libc_cv_cc_with_libunwind, [ | |
1363 | cat > conftest.c <<EOF | |
cbdb12de UD |
1364 | int main (void) { return 0; } |
1365 | EOF | |
a0da5fe1 | 1366 | if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -static -o conftest \ |
8175a253 | 1367 | conftest.c -v 2>&1 >/dev/null | grep ' -lunwind ' >/dev/null; then |
a0da5fe1 UD |
1368 | libc_cv_cc_with_libunwind=yes |
1369 | else | |
1370 | libc_cv_cc_with_libunwind=no | |
c776b3d7 | 1371 | fi |
a0da5fe1 UD |
1372 | rm -f conftest*]) |
1373 | AC_SUBST(libc_cv_cc_with_libunwind) | |
1374 | if test $libc_cv_cc_with_libunwind = yes; then | |
1375 | AC_DEFINE(HAVE_CC_WITH_LIBUNWIND) | |
1376 | fi | |
c776b3d7 | 1377 | |
6bfea974 L |
1378 | LIBC_LINKER_FEATURE([-z nodelete], [-Wl,--enable-new-dtags,-z,nodelete], |
1379 | [libc_cv_z_nodelete=yes], | |
1380 | [AC_MSG_ERROR(linker with -z nodelete support required)]) | |
2f54c82d | 1381 | |
6bfea974 L |
1382 | LIBC_LINKER_FEATURE([-z nodlopen], [-Wl,--enable-new-dtags,-z,nodlopen], |
1383 | [libc_cv_z_nodlopen=yes], | |
1384 | [AC_MSG_ERROR(linker with -z nodlopen support required)]) | |
5d916713 | 1385 | |
6bfea974 L |
1386 | LIBC_LINKER_FEATURE([-z initfirst], [-Wl,--enable-new-dtags,-z,initfirst], |
1387 | [libc_cv_z_initfirst=yes], | |
1388 | [AC_MSG_ERROR(linker with -z initfirst support required)]) | |
639c3248 | 1389 | |
a0da5fe1 UD |
1390 | AC_CACHE_CHECK(for -Bgroup option, |
1391 | libc_cv_Bgroup, [dnl | |
1392 | cat > conftest.c <<EOF | |
639c3248 UD |
1393 | int _start (void) { return 42; } |
1394 | EOF | |
a0da5fe1 UD |
1395 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS |
1396 | -fPIC -shared -o conftest.so conftest.c | |
1397 | -Wl,-Bgroup -nostdlib 1>&AS_MESSAGE_LOG_FD]) | |
1398 | then | |
1399 | libc_cv_Bgroup=yes | |
1400 | else | |
1401 | libc_cv_Bgroup=no | |
1402 | fi | |
1403 | rm -f conftest*]) | |
1404 | AC_SUBST(libc_cv_Bgroup) | |
a711b01d | 1405 | |
a0da5fe1 UD |
1406 | ASFLAGS_config= |
1407 | AC_CACHE_CHECK(whether --noexecstack is desirable for .S files, | |
1408 | libc_cv_as_noexecstack, [dnl | |
1409 | cat > conftest.c <<EOF | |
35915ec8 UD |
1410 | void foo (void) { } |
1411 | EOF | |
a0da5fe1 UD |
1412 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS |
1413 | -S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \ | |
8175a253 | 1414 | && grep .note.GNU-stack conftest.s >/dev/null \ |
a0da5fe1 UD |
1415 | && AC_TRY_COMMAND([${CC-cc} $ASFLAGS -Wa,--noexecstack |
1416 | -c -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD]) | |
1417 | then | |
1418 | libc_cv_as_noexecstack=yes | |
1419 | else | |
1420 | libc_cv_as_noexecstack=no | |
1421 | fi | |
1422 | rm -f conftest*]) | |
1423 | if test $libc_cv_as_noexecstack = yes; then | |
1424 | ASFLAGS_config="$ASFLAGS_config -Wa,--noexecstack" | |
1425 | fi | |
1426 | AC_SUBST(ASFLAGS_config) | |
2abf9ff1 | 1427 | |
a0da5fe1 UD |
1428 | AC_CACHE_CHECK(for -z combreloc, |
1429 | libc_cv_z_combreloc, [dnl | |
1430 | cat > conftest.c <<EOF | |
d555194c UD |
1431 | extern int bar (int); |
1432 | extern int mumble; | |
1433 | int foo (void) { return bar (mumble); } | |
a711b01d | 1434 | EOF |
a0da5fe1 | 1435 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS |
dbc92dc6 | 1436 | -fPIC -shared -o conftest.so conftest.c |
35cd3c97 | 1437 | -nostdlib -nostartfiles |
c2f55635 | 1438 | -Wl,-z,combreloc 1>&AS_MESSAGE_LOG_FD]) |
a0da5fe1 | 1439 | then |
a711b01d UD |
1440 | dnl The following test is a bit weak. We must use a tool which can test |
1441 | dnl cross-platform since the gcc used can be a cross compiler. Without | |
1442 | dnl introducing new options this is not easily doable. Instead use a tool | |
1443 | dnl which always is cross-platform: readelf. To detect whether -z combreloc | |
1444 | dnl look for a section named .rel.dyn. | |
a0da5fe1 UD |
1445 | if $READELF -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then |
1446 | libc_cv_z_combreloc=yes | |
fdde8349 UD |
1447 | else |
1448 | libc_cv_z_combreloc=no | |
a711b01d | 1449 | fi |
a0da5fe1 UD |
1450 | else |
1451 | libc_cv_z_combreloc=no | |
1452 | fi | |
1453 | rm -f conftest*]) | |
1454 | if test "$libc_cv_z_combreloc" = yes; then | |
1455 | AC_DEFINE(HAVE_Z_COMBRELOC) | |
1456 | fi | |
1457 | AC_SUBST(libc_cv_z_combreloc) | |
2abf9ff1 | 1458 | |
6bfea974 L |
1459 | LIBC_LINKER_FEATURE([-z execstack], [-Wl,-z,execstack], |
1460 | [libc_cv_z_execstack=yes], [libc_cv_z_execstack=no]) | |
a0da5fe1 | 1461 | AC_SUBST(libc_cv_z_execstack) |
c9c60884 | 1462 | |
a0da5fe1 | 1463 | AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl |
4da0431d JM |
1464 | LIBC_TRY_CC_OPTION([-fpie], [libc_cv_fpie=yes], [libc_cv_fpie=no]) |
1465 | ]) | |
c9c60884 | 1466 | |
a0da5fe1 | 1467 | AC_SUBST(libc_cv_fpie) |
871b9158 | 1468 | |
a0da5fe1 UD |
1469 | AC_CACHE_CHECK(for --hash-style option, |
1470 | libc_cv_hashstyle, [dnl | |
1471 | cat > conftest.c <<EOF | |
871b9158 UD |
1472 | int _start (void) { return 42; } |
1473 | EOF | |
a0da5fe1 UD |
1474 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS |
1475 | -fPIC -shared -o conftest.so conftest.c | |
1476 | -Wl,--hash-style=both -nostdlib 1>&AS_MESSAGE_LOG_FD]) | |
1477 | then | |
1478 | libc_cv_hashstyle=yes | |
1479 | else | |
1480 | libc_cv_hashstyle=no | |
1481 | fi | |
1482 | rm -f conftest*]) | |
1483 | AC_SUBST(libc_cv_hashstyle) | |
1484 | ||
1485 | # The linker's default -shared behavior is good enough if it | |
1486 | # does these things that our custom linker scripts ensure that | |
1487 | # all allocated NOTE sections come first. | |
1488 | if test "$use_default_link" = default; then | |
1489 | AC_CACHE_CHECK([for sufficient default -shared layout], | |
1490 | libc_cv_use_default_link, [dnl | |
1491 | libc_cv_use_default_link=no | |
1492 | cat > conftest.s <<\EOF | |
fd5e21c7 RM |
1493 | .section .note.a,"a",%note |
1494 | .balign 4 | |
1495 | .long 4,4,9 | |
1496 | .string "GNU" | |
1497 | .string "foo" | |
1498 | .section .note.b,"a",%note | |
1499 | .balign 4 | |
1500 | .long 4,4,9 | |
1501 | .string "GNU" | |
1502 | .string "bar" | |
1503 | EOF | |
a0da5fe1 | 1504 | if AC_TRY_COMMAND([dnl |
fd5e21c7 RM |
1505 | ${CC-cc} $ASFLAGS -shared -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD]) && |
1506 | ac_try=`$READELF -S conftest.so | sed -n \ | |
1507 | ['${x;p;} | |
1508 | s/^ *\[ *[1-9][0-9]*\] *\([^ ][^ ]*\) *\([^ ][^ ]*\) .*$/\2 \1/ | |
1509 | t a | |
1510 | b | |
1511 | : a | |
1512 | H']` | |
a0da5fe1 UD |
1513 | then |
1514 | libc_seen_a=no libc_seen_b=no | |
1515 | set -- $ac_try | |
1516 | while test $# -ge 2 -a "$1" = NOTE; do | |
1517 | case "$2" in | |
1518 | .note.a) libc_seen_a=yes ;; | |
1519 | .note.b) libc_seen_b=yes ;; | |
1520 | esac | |
1521 | shift 2 | |
1522 | done | |
1523 | case "$libc_seen_a$libc_seen_b" in | |
1524 | yesyes) | |
1525 | libc_cv_use_default_link=yes | |
1526 | ;; | |
1527 | *) | |
1528 | echo >&AS_MESSAGE_LOG_FD "\ | |
fd5e21c7 RM |
1529 | $libc_seen_a$libc_seen_b from: |
1530 | $ac_try" | |
a0da5fe1 UD |
1531 | ;; |
1532 | esac | |
fd5e21c7 | 1533 | fi |
a0da5fe1 UD |
1534 | rm -f conftest*]) |
1535 | use_default_link=$libc_cv_use_default_link | |
fd26970f | 1536 | fi |
49803108 | 1537 | |
5c550700 RM |
1538 | AC_CACHE_CHECK(linker output format, libc_cv_output_format, [dnl |
1539 | if libc_cv_output_format=` | |
1540 | ${CC-cc} -nostartfiles -nostdlib -Wl,--print-output-format 2>&AS_MESSAGE_LOG_FD` | |
1541 | then | |
1542 | : | |
1543 | else | |
1544 | libc_cv_output_format= | |
1545 | fi | |
1546 | test -n "$libc_cv_output_format" || libc_cv_output_format=unknown]) | |
1547 | AC_SUBST(libc_cv_output_format) | |
1548 | ||
22dca1ea | 1549 | AC_CACHE_CHECK(for -fno-toplevel-reorder -fno-section-anchors, libc_cv_fno_toplevel_reorder, [dnl |
49803108 AJ |
1550 | cat > conftest.c <<EOF |
1551 | int foo; | |
1552 | EOF | |
22dca1ea | 1553 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fno-toplevel-reorder -fno-section-anchors |
49803108 AJ |
1554 | conftest.c 1>&AS_MESSAGE_LOG_FD]) |
1555 | then | |
18e2ac6d | 1556 | libc_cv_fno_toplevel_reorder=yes |
49803108 | 1557 | else |
18e2ac6d | 1558 | libc_cv_fno_toplevel_reorder=no |
49803108 AJ |
1559 | fi |
1560 | rm -f conftest*]) | |
18e2ac6d | 1561 | if test $libc_cv_fno_toplevel_reorder = yes; then |
22dca1ea | 1562 | fno_unit_at_a_time="-fno-toplevel-reorder -fno-section-anchors" |
18e2ac6d | 1563 | else |
49803108 AJ |
1564 | fno_unit_at_a_time=-fno-unit-at-a-time |
1565 | fi | |
1566 | AC_SUBST(fno_unit_at_a_time) | |
fd26970f | 1567 | |
401a9ec9 | 1568 | AC_CACHE_CHECK(for -fstack-protector, libc_cv_ssp, [dnl |
17228132 TS |
1569 | LIBC_TRY_CC_OPTION([$CFLAGS $CPPFLAGS -Werror -fstack-protector], |
1570 | [libc_cv_ssp=yes], | |
1571 | [libc_cv_ssp=no]) | |
1572 | ]) | |
401a9ec9 UD |
1573 | AC_SUBST(libc_cv_ssp) |
1574 | ||
b037a293 UD |
1575 | AC_CACHE_CHECK(for -fgnu89-inline, libc_cv_gnu89_inline, [dnl |
1576 | cat > conftest.c <<EOF | |
1577 | int foo; | |
1578 | #ifdef __GNUC_GNU_INLINE__ | |
1579 | main () { return 0;} | |
1580 | #else | |
1581 | #error | |
1582 | #endif | |
1583 | EOF | |
371f84a4 JJ |
1584 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -std=gnu99 -fgnu89-inline |
1585 | -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) | |
b037a293 UD |
1586 | then |
1587 | libc_cv_gnu89_inline=yes | |
1588 | else | |
1589 | libc_cv_gnu89_inline=no | |
1590 | fi | |
1591 | rm -f conftest*]) | |
1592 | if test $libc_cv_gnu89_inline = yes; then | |
1c7570ff | 1593 | gnu89_inline=-fgnu89-inline |
b037a293 | 1594 | else |
1c7570ff | 1595 | gnu89_inline= |
b037a293 | 1596 | fi |
1c7570ff | 1597 | AC_SUBST(gnu89_inline) |
b037a293 | 1598 | |
a0da5fe1 UD |
1599 | AC_CACHE_CHECK(whether cc puts quotes around section names, |
1600 | libc_cv_have_section_quotes, | |
1601 | [cat > conftest.c <<EOF | |
1602 | static const int foo | |
1603 | __attribute__ ((section ("bar"))) = 1; | |
e26dd47f | 1604 | EOF |
a0da5fe1 UD |
1605 | if ${CC-cc} -S conftest.c -o conftest.s; then |
1606 | if grep '\.section.*"bar"' conftest.s >/dev/null; then | |
1607 | libc_cv_have_section_quotes=yes | |
e26dd47f | 1608 | else |
a0da5fe1 | 1609 | libc_cv_have_section_quotes=no |
e26dd47f | 1610 | fi |
a0da5fe1 UD |
1611 | else |
1612 | libc_cv_have_section_quotes=unknown | |
1613 | fi | |
1614 | rm -f conftest.{c,s} | |
1615 | ]) | |
1616 | if test $libc_cv_have_section_quotes = yes; then | |
1617 | AC_DEFINE(HAVE_SECTION_QUOTES) | |
9a97d1f7 UD |
1618 | fi |
1619 | ||
1620 | AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive, | |
75d86c1f | 1621 | [dnl |
c224a18a | 1622 | cat > conftest.s <<EOF |
2293395f | 1623 | ${libc_cv_dot_text} |
7b8e0d49 | 1624 | .globl foo |
ae1025be | 1625 | foo: |
c224a18a RM |
1626 | .weak foo |
1627 | .weak bar; bar = foo | |
1628 | EOF | |
3217788f | 1629 | if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then |
9a97d1f7 UD |
1630 | libc_cv_asm_weak_directive=yes |
1631 | else | |
1632 | libc_cv_asm_weak_directive=no | |
1633 | fi | |
1634 | rm -f conftest*]) | |
c224a18a | 1635 | |
c8cf0b14 | 1636 | if test $libc_cv_asm_weak_directive = no; then |
c224a18a RM |
1637 | AC_CACHE_CHECK(for assembler .weakext directive, |
1638 | libc_cv_asm_weakext_directive, | |
1639 | [dnl | |
1640 | cat > conftest.s <<EOF | |
2293395f | 1641 | ${libc_cv_dot_text} |
7b8e0d49 | 1642 | .globl foo |
ae1025be | 1643 | foo: |
f802accb UD |
1644 | .weakext bar foo |
1645 | .weakext baz | |
7b8e0d49 | 1646 | .globl baz |
9a97d1f7 | 1647 | baz: |
c224a18a | 1648 | EOF |
3217788f | 1649 | if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then |
c224a18a RM |
1650 | libc_cv_asm_weakext_directive=yes |
1651 | else | |
1652 | libc_cv_asm_weakext_directive=no | |
1653 | fi | |
1654 | rm -f conftest*]) | |
1655 | ||
9a97d1f7 | 1656 | fi # no .weak |
c224a18a | 1657 | |
ffcf9634 | 1658 | if test $libc_cv_asm_weak_directive = yes; then |
c224a18a | 1659 | AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE) |
ffcf9634 | 1660 | elif test $libc_cv_asm_weakext_directive = yes; then |
c224a18a RM |
1661 | AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE) |
1662 | fi | |
1663 | ||
a641835a RM |
1664 | AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl |
1665 | cat > conftest.c <<\EOF | |
5f0e6fc7 | 1666 | _start () {} |
dcf0671d UD |
1667 | int __eh_pc; |
1668 | __throw () {} | |
a641835a | 1669 | EOF |
dcea62dd | 1670 | dnl No \ in command here because it ends up inside ''. |
3217788f | 1671 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS |
dcea62dd | 1672 | -nostdlib -nostartfiles -Wl,--no-whole-archive |
c2f55635 | 1673 | -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then |
a641835a RM |
1674 | libc_cv_ld_no_whole_archive=yes |
1675 | else | |
1676 | libc_cv_ld_no_whole_archive=no | |
1677 | fi | |
1678 | rm -f conftest*]) | |
3ce1f295 UD |
1679 | if test $libc_cv_ld_no_whole_archive = no; then |
1680 | AC_MSG_ERROR([support for --no-whole-archive is needed]) | |
b17277cf | 1681 | fi |
a641835a | 1682 | |
dff14448 | 1683 | AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl |
b236e99d UD |
1684 | cat > conftest.c <<\EOF |
1685 | _start () {} | |
1686 | int __eh_pc; | |
1687 | __throw () {} | |
1688 | EOF | |
1689 | dnl No \ in command here because it ends up inside ''. | |
3217788f | 1690 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS |
dff14448 | 1691 | -nostdlib -nostartfiles -fexceptions |
c2f55635 | 1692 | -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then |
dff14448 | 1693 | libc_cv_gcc_exceptions=yes |
b236e99d | 1694 | else |
dff14448 | 1695 | libc_cv_gcc_exceptions=no |
b236e99d UD |
1696 | fi |
1697 | rm -f conftest*]) | |
dff14448 UD |
1698 | if test $libc_cv_gcc_exceptions = yes; then |
1699 | exceptions=-fexceptions | |
b17277cf | 1700 | fi |
dff14448 | 1701 | AC_SUBST(exceptions)dnl |
b236e99d | 1702 | |
d555194c UD |
1703 | AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl |
1704 | cat > conftest.c <<\EOF | |
1705 | void zero (void *x) | |
1706 | { | |
a52d1562 | 1707 | __builtin_memset (x, 0, 1000); |
d555194c UD |
1708 | } |
1709 | EOF | |
1710 | dnl | |
1711 | if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]); | |
1712 | then | |
1713 | libc_cv_gcc_builtin_memset=no | |
1714 | else | |
1715 | libc_cv_gcc_builtin_memset=yes | |
1716 | fi | |
1717 | rm -f conftest* ]) | |
1718 | if test "$libc_cv_gcc_builtin_memset" = yes ; then | |
1719 | AC_DEFINE(HAVE_BUILTIN_MEMSET) | |
1720 | fi | |
1721 | ||
85dd1003 UD |
1722 | AC_CACHE_CHECK(for redirection of built-in functions, libc_cv_gcc_builtin_redirection, [dnl |
1723 | cat > conftest.c <<\EOF | |
1724 | extern char *strstr (const char *, const char *) __asm ("my_strstr"); | |
1725 | char *foo (const char *a, const char *b) | |
1726 | { | |
1727 | return __builtin_strstr (a, b); | |
1728 | } | |
1729 | EOF | |
1730 | dnl | |
1731 | if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "my_strstr" > /dev/null]); | |
1732 | then | |
1733 | libc_cv_gcc_builtin_redirection=yes | |
1734 | else | |
1735 | libc_cv_gcc_builtin_redirection=no | |
1736 | fi | |
1737 | rm -f conftest* ]) | |
3ce1f295 UD |
1738 | if test "$libc_cv_gcc_builtin_redirection" = no; then |
1739 | AC_MSG_ERROR([support for the symbol redirection needed]) | |
85dd1003 UD |
1740 | fi |
1741 | ||
739d440d | 1742 | dnl Check whether the compiler supports the __thread keyword. |
3ce1f295 UD |
1743 | AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread, |
1744 | [cat > conftest.c <<\EOF | |
fbb18522 RM |
1745 | __thread int a = 42; |
1746 | EOF | |
3ce1f295 UD |
1747 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then |
1748 | libc_cv_gcc___thread=yes | |
739d440d UD |
1749 | else |
1750 | libc_cv_gcc___thread=no | |
1751 | fi | |
3ce1f295 UD |
1752 | rm -f conftest*]) |
1753 | if test "$libc_cv_gcc___thread" = no; then | |
1754 | AC_MSG_ERROR([support for the __thread keyword is required]) | |
1755 | fi | |
739d440d | 1756 | |
3ce1f295 UD |
1757 | dnl Check whether the compiler supports the tls_model attribute. |
1758 | AC_CACHE_CHECK([for tls_model attribute], libc_cv_gcc_tls_model_attr, [dnl | |
1759 | cat > conftest.c <<\EOF | |
9b21e6bc RM |
1760 | extern __thread int a __attribute__((tls_model ("initial-exec"))); |
1761 | EOF | |
3ce1f295 UD |
1762 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -Werror conftest.c >&AS_MESSAGE_LOG_FD]); then |
1763 | libc_cv_gcc_tls_model_attr=yes | |
1764 | else | |
1765 | libc_cv_gcc_tls_model_attr=no | |
1766 | fi | |
1767 | rm -f conftest*]) | |
1768 | if test "$libc_cv_gcc_tls_model_attr" = no; then | |
1769 | AC_MSG_ERROR([support for the tls_model attribute is required]) | |
9b21e6bc | 1770 | fi |
739d440d | 1771 | |
7998fa78 AS |
1772 | dnl Determine how to disable generation of FMA instructions. |
1773 | AC_CACHE_CHECK([for compiler option to disable generation of FMA instructions], | |
1774 | libc_cv_cc_nofma, [dnl | |
1775 | libc_cv_cc_nofma= | |
1776 | for opt in -ffp-contract=off -mno-fused-madd; do | |
1777 | LIBC_TRY_CC_OPTION([$opt], [libc_cv_cc_nofma=$opt; break]) | |
1778 | done]) | |
bef0b507 | 1779 | AC_SUBST(libc_cv_cc_nofma) |
7998fa78 | 1780 | |
2cf9ad57 RM |
1781 | if test -n "$submachine"; then |
1782 | AC_CACHE_CHECK([for compiler option for CPU variant], | |
f7d82dc9 | 1783 | libc_cv_cc_submachine, [dnl |
2cf9ad57 RM |
1784 | libc_cv_cc_submachine=no |
1785 | for opt in "-march=$submachine" "-mcpu=$submachine"; do | |
40b601fb | 1786 | LIBC_TRY_CC_OPTION([$opt], [ |
2cf9ad57 | 1787 | libc_cv_cc_submachine="$opt" |
40b601fb | 1788 | break], []) |
2cf9ad57 RM |
1789 | done]) |
1790 | if test "x$libc_cv_cc_submachine" = xno; then | |
1791 | AC_MSG_ERROR([${CC-cc} does not support $submachine]) | |
1792 | fi | |
1793 | fi | |
1794 | AC_SUBST(libc_cv_cc_submachine) | |
1795 | ||
85c2e611 AZ |
1796 | AC_CACHE_CHECK(if $CC accepts -fno-tree-loop-distribute-patterns with \ |
1797 | __attribute__ ((__optimize__)), libc_cv_cc_loop_to_function, [dnl | |
1798 | cat > conftest.c <<EOF | |
1799 | void | |
1800 | __attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns"))) | |
1801 | foo (void) {} | |
1802 | EOF | |
1803 | libc_cv_cc_loop_to_function=no | |
1804 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c]) | |
1805 | then | |
1806 | libc_cv_cc_loop_to_function=yes | |
1807 | fi | |
1808 | rm -f conftest*]) | |
1809 | if test $libc_cv_cc_loop_to_function = yes; then | |
1810 | AC_DEFINE(HAVE_CC_INHIBIT_LOOP_TO_LIBCALL) | |
1811 | fi | |
1812 | AC_SUBST(libc_cv_cc_loop_to_function) | |
1813 | ||
c8f3e6db UD |
1814 | dnl Check whether we have the gd library available. |
1815 | AC_MSG_CHECKING(for libgd) | |
6dab8688 UD |
1816 | if test "$with_gd" != "no"; then |
1817 | old_CFLAGS="$CFLAGS" | |
1818 | CFLAGS="$CFLAGS $libgd_include" | |
1819 | old_LDFLAGS="$LDFLAGS" | |
1820 | LDFLAGS="$LDFLAGS $libgd_ldflags" | |
1821 | old_LIBS="$LIBS" | |
1822 | LIBS="$LIBS -lgd -lpng -lz -lm" | |
1823 | AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no) | |
1824 | CFLAGS="$old_CFLAGS" | |
1825 | LDFLAGS="$old_LDFLAGS" | |
1826 | LIBS="$old_LIBS" | |
1827 | else | |
1828 | LIBGD=no | |
1829 | fi | |
c8f3e6db UD |
1830 | AC_MSG_RESULT($LIBGD) |
1831 | AC_SUBST(LIBGD) | |
3d558f4e | 1832 | |
2fff3d93 UD |
1833 | # SELinux detection |
1834 | if test x$with_selinux = xno ; then | |
1835 | have_selinux=no; | |
1836 | else | |
1837 | # See if we have the SELinux library | |
1838 | AC_CHECK_LIB(selinux, is_selinux_enabled, | |
1839 | have_selinux=yes, have_selinux=no) | |
49155d51 | 1840 | if test x$with_selinux = xyes ; then |
2fff3d93 | 1841 | if test x$have_selinux = xno ; then |
0699f766 | 1842 | AC_MSG_ERROR([SELinux explicitly required, but SELinux library not found]) |
2fff3d93 UD |
1843 | fi |
1844 | fi | |
1845 | fi | |
1846 | # Check if we're building with SELinux support. | |
1847 | if test "x$have_selinux" = xyes; then | |
943db9eb | 1848 | AC_DEFINE(HAVE_SELINUX, 1, [SELinux support]) |
ec23b9be UD |
1849 | |
1850 | # See if we have the libaudit library | |
943db9eb | 1851 | AC_CHECK_LIB(audit, audit_log_user_avc_message, |
77e8bddf | 1852 | have_libaudit=yes, have_libaudit=no) |
ec23b9be | 1853 | if test "x$have_libaudit" = xyes; then |
943db9eb | 1854 | AC_DEFINE(HAVE_LIBAUDIT, 1, [SELinux libaudit support]) |
ec23b9be UD |
1855 | fi |
1856 | AC_SUBST(have_libaudit) | |
1f063dca UD |
1857 | |
1858 | # See if we have the libcap library | |
1859 | AC_CHECK_LIB(cap, cap_init, have_libcap=yes, have_libcap=no) | |
1860 | if test "x$have_libcap" = xyes; then | |
1861 | AC_DEFINE(HAVE_LIBCAP, 1, [SELinux libcap support]) | |
1862 | fi | |
1863 | AC_SUBST(have_libcap) | |
2fff3d93 UD |
1864 | fi |
1865 | AC_SUBST(have_selinux) | |
1866 | ||
8ed1e7d5 GK |
1867 | dnl check for the size of 'long double'. |
1868 | AC_CHECK_SIZEOF(long double, 0) | |
1869 | sizeof_long_double=$ac_cv_sizeof_long_double | |
1870 | AC_SUBST(sizeof_long_double) | |
1871 | ||
61653dfb RM |
1872 | CPPUNDEFS= |
1873 | dnl Check for silly hacked compilers predefining _FORTIFY_SOURCE. | |
1874 | dnl Since we are building the implementations of the fortified functions here, | |
1875 | dnl having the macro defined interacts very badly. | |
1876 | AC_CACHE_CHECK([for _FORTIFY_SOURCE predefine], libc_cv_predef_fortify_source, | |
1877 | [AC_TRY_COMPILE([], [ | |
1878 | #ifdef _FORTIFY_SOURCE | |
1879 | # error bogon | |
1880 | #endif], | |
1881 | [libc_cv_predef_fortify_source=no], | |
1882 | [libc_cv_predef_fortify_source=yes])]) | |
1883 | if test $libc_cv_predef_fortify_source = yes; then | |
1884 | CPPUNDEFS="${CPPUNDEFS:+$CPPUNDEFS }-U_FORTIFY_SOURCE" | |
1885 | fi | |
1886 | AC_SUBST(CPPUNDEFS) | |
1887 | ||
30b99d79 RM |
1888 | dnl Check for silly hacked compilers inserting -fstack-protector. |
1889 | dnl This breaks badly for the early startup code we compile, since | |
1890 | dnl the compiled code can refer to a magic machine-dependent location | |
1891 | dnl for the canary value before we have sufficient setup for that to | |
1892 | dnl work. It's also questionable to build all of libc with this flag | |
1893 | dnl even when you're doing that for most applications you build, since | |
1894 | dnl libc's code is so heavily-used and performance-sensitive. If we | |
1895 | dnl ever really want to make that work, it should be enabled explicitly | |
1896 | dnl in the libc build, not inherited from implicit compiler settings. | |
1897 | AC_CACHE_CHECK([whether $CC implicitly enables -fstack-protector], | |
1898 | libc_cv_predef_stack_protector, [ | |
1899 | AC_TRY_COMPILE([extern void foobar (char *);], | |
1900 | [char large_array[2048]; foobar (large_array);], [ | |
1901 | libc_undefs=`$NM -u conftest.o | | |
1902 | LC_ALL=C $AWK '$1 == "U" { print $2 | "sort -u"; next } { exit(1) }' \ | |
1903 | 2>&AS_MESSAGE_LOG_FD` || { | |
1904 | AC_MSG_ERROR([confusing output from $NM -u]) | |
1905 | } | |
1906 | echo >&AS_MESSAGE_LOG_FD "libc_undefs='$libc_undefs'" | |
59f0c22e JM |
1907 | # On some architectures, there are architecture-specific undefined |
1908 | # symbols (resolved by the linker), so filter out unknown symbols. | |
1909 | # This will fail to produce the correct result if the compiler | |
1910 | # defaults to -fstack-protector but this produces an undefined symbol | |
1911 | # other than __stack_chk_fail. However, compilers like that have not | |
1912 | # been encountered in practice. | |
1913 | libc_undefs=`echo "$libc_undefs" | egrep '^(foobar|__stack_chk_fail)$'` | |
30b99d79 RM |
1914 | case "$libc_undefs" in |
1915 | foobar) libc_cv_predef_stack_protector=no ;; | |
1916 | '__stack_chk_fail | |
1917 | foobar') libc_cv_predef_stack_protector=yes ;; | |
1918 | *) AC_MSG_ERROR([unexpected symbols in test: $libc_undefs]) ;; | |
1919 | esac], | |
1920 | [AC_MSG_ERROR([test compilation failed])]) | |
1921 | ]) | |
1922 | libc_extra_cflags= | |
1923 | if test $libc_cv_predef_stack_protector = yes; then | |
7ffa9423 | 1924 | libc_extra_cflags="$libc_extra_cflags -fno-stack-protector" |
30b99d79 | 1925 | fi |
7ffa9423 | 1926 | libc_extra_cppflags= |
30b99d79 | 1927 | |
61b1ef6e MF |
1928 | # Some linkers on some architectures support __ehdr_start but with |
1929 | # bugs. Make sure usage of it does not create relocations in the | |
1930 | # output (as the linker should resolve them all for us). | |
1931 | AC_CACHE_CHECK([whether the linker provides working __ehdr_start], | |
44c4e5d5 RM |
1932 | libc_cv_ehdr_start, [ |
1933 | old_CFLAGS="$CFLAGS" | |
1934 | old_LDFLAGS="$LDFLAGS" | |
1935 | old_LIBS="$LIBS" | |
1936 | CFLAGS="$CFLAGS -fPIC" | |
1937 | LDFLAGS="$LDFLAGS -nostdlib -nostartfiles -shared" | |
1938 | LIBS= | |
1939 | AC_LINK_IFELSE([AC_LANG_SOURCE([ | |
61b1ef6e MF |
1940 | typedef struct { |
1941 | char foo; | |
1942 | long val; | |
1943 | } Ehdr; | |
1944 | extern const Ehdr __ehdr_start __attribute__ ((visibility ("hidden"))); | |
1945 | long ehdr (void) { return __ehdr_start.val; } | |
44c4e5d5 | 1946 | ])], |
61b1ef6e MF |
1947 | [if $READELF -r conftest | fgrep __ehdr_start >/dev/null; then |
1948 | libc_cv_ehdr_start=broken | |
1949 | else | |
1950 | libc_cv_ehdr_start=yes | |
1951 | fi], [libc_cv_ehdr_start=no]) | |
44c4e5d5 RM |
1952 | CFLAGS="$old_CFLAGS" |
1953 | LDFLAGS="$old_LDFLAGS" | |
1954 | LIBS="$old_LIBS" | |
1955 | ]) | |
61b1ef6e | 1956 | if test "$libc_cv_ehdr_start" = yes; then |
44c4e5d5 | 1957 | AC_DEFINE([HAVE_EHDR_START]) |
61b1ef6e MF |
1958 | elif test "$libc_cv_ehdr_start" = broken; then |
1959 | AC_MSG_WARN([linker is broken -- you should upgrade]) | |
9fe7e787 RM |
1960 | fi |
1961 | ||
1962 | AC_CACHE_CHECK(for __builtin_trap with no external dependencies, | |
1963 | libc_cv_builtin_trap, [dnl | |
1964 | libc_cv_builtin_trap=no | |
1965 | AC_TRY_COMPILE([], [__builtin_trap ()], [ | |
1966 | libc_undefs=`$NM -u conftest.o | | |
1967 | LC_ALL=C $AWK '$1 == "U" { print $2 | "sort -u"; next } { exit(1) }' \ | |
1968 | 2>&AS_MESSAGE_LOG_FD` || { | |
1969 | AC_MSG_ERROR([confusing output from $NM -u]) | |
1970 | } | |
1971 | echo >&AS_MESSAGE_LOG_FD "libc_undefs='$libc_undefs'" | |
1972 | if test -z "$libc_undefs"; then | |
1973 | libc_cv_builtin_trap=yes | |
1974 | fi])]) | |
1975 | if test $libc_cv_builtin_trap = yes; then | |
1976 | AC_DEFINE([HAVE_BUILTIN_TRAP]) | |
44c4e5d5 RM |
1977 | fi |
1978 | ||
c224a18a RM |
1979 | ### End of automated tests. |
1980 | ### Now run sysdeps configure fragments. | |
1981 | ||
cb343854 | 1982 | # They also can set these variables. |
591e1ffb | 1983 | use_ldconfig=no |
cb343854 | 1984 | ldd_rewrite_script=no |
77259608 | 1985 | libc_cv_sysconfdir=$sysconfdir |
4248b1b1 | 1986 | libc_cv_localstatedir=$localstatedir |
74bd2300 | 1987 | libc_cv_gcc_unwind_find_fde=no |
e2fd3cbe | 1988 | libc_cv_idn=no |
cb343854 | 1989 | |
28f540f4 | 1990 | # Iterate over all the sysdep directories we will use, running their |
09055553 | 1991 | # configure fragments. |
28f540f4 | 1992 | for dir in $sysnames; do |
57ba7bb4 UD |
1993 | case $dir in |
1994 | /*) dest=$dir ;; | |
1995 | *) dest=$srcdir/$dir ;; | |
1996 | esac | |
1997 | if test -r $dest/configure; then | |
d1149385 | 1998 | AC_MSG_RESULT(running configure fragment for $dir) |
57ba7bb4 | 1999 | . $dest/configure |
28f540f4 | 2000 | fi |
28f540f4 RM |
2001 | done |
2002 | ||
5695d46f AS |
2003 | if test x"$build_mathvec" = xnotset; then |
2004 | build_mathvec=no | |
2005 | fi | |
2006 | LIBC_CONFIG_VAR([build-mathvec], [$build_mathvec]) | |
2007 | ||
7ffa9423 AZ |
2008 | AC_SUBST(libc_extra_cflags) |
2009 | AC_SUBST(libc_extra_cppflags) | |
2010 | ||
74bd2300 UD |
2011 | if test x$libc_cv_gcc_unwind_find_fde = xyes; then |
2012 | AC_DEFINE(EXPORT_UNWIND_FIND_FDE) | |
2013 | fi | |
2014 | AC_SUBST(libc_cv_gcc_unwind_find_fde) | |
2015 | ||
6e6249d0 RM |
2016 | # A sysdeps configure fragment can reset this if IFUNC is not actually |
2017 | # usable even though the assembler knows how to generate the symbol type. | |
2018 | if test x"$libc_cv_ld_gnu_indirect_function" = xyes; then | |
2019 | AC_DEFINE(HAVE_IFUNC) | |
2020 | fi | |
2021 | ||
3cc3ef96 RM |
2022 | # This is far from the AC_ARG_ENABLE that sets it so that a sysdeps |
2023 | # configure fragment can override the value to prevent this AC_DEFINE. | |
2024 | AC_SUBST(use_nscd) | |
2025 | if test "x$use_nscd" != xno; then | |
2026 | AC_DEFINE([USE_NSCD]) | |
2027 | fi | |
c53d909c RM |
2028 | if test "x$build_nscd" = xdefault; then |
2029 | build_nscd=$use_nscd | |
2030 | fi | |
3cc3ef96 | 2031 | |
a53bad16 UD |
2032 | # Test for old glibc 2.0.x headers so that they can be removed properly |
2033 | # Search only in includedir. | |
2034 | AC_MSG_CHECKING(for old glibc 2.0.x headers) | |
350eb336 | 2035 | if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h" |
a53bad16 UD |
2036 | then |
2037 | old_glibc_headers=yes | |
2038 | else | |
2039 | old_glibc_headers=no | |
2040 | fi | |
2041 | AC_MSG_RESULT($old_glibc_headers) | |
2042 | if test ${old_glibc_headers} = yes; then | |
2043 | AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will) | |
2044 | AC_MSG_WARN(*** be removed.) | |
2045 | fi | |
b195f6bc | 2046 | AC_SUBST(old_glibc_headers) |
26b4d766 | 2047 | |
84384f5b | 2048 | AC_SUBST(libc_cv_slibdir) |
aaa8cb4b | 2049 | AC_SUBST(libc_cv_rtlddir) |
a1d84548 | 2050 | AC_SUBST(libc_cv_localedir) |
77259608 | 2051 | AC_SUBST(libc_cv_sysconfdir) |
4248b1b1 | 2052 | AC_SUBST(libc_cv_localstatedir) |
1ef32c3d | 2053 | AC_SUBST(libc_cv_rootsbindir) |
bcd5f356 | 2054 | AC_SUBST(libc_cv_forced_unwind) |
1ef32c3d | 2055 | |
f57f8055 RM |
2056 | if test x$use_ldconfig = xyes; then |
2057 | AC_DEFINE(USE_LDCONFIG) | |
2058 | fi | |
591e1ffb | 2059 | AC_SUBST(use_ldconfig) |
cb343854 | 2060 | AC_SUBST(ldd_rewrite_script) |
84384f5b | 2061 | |
650425ce | 2062 | AC_SUBST(static) |
ff3d7ed3 | 2063 | AC_SUBST(shared) |
a334319f | 2064 | |
ff886b82 UD |
2065 | AC_CACHE_CHECK([whether -fPIC is default], libc_cv_pic_default, |
2066 | [libc_cv_pic_default=yes | |
cc3fa755 | 2067 | cat > conftest.c <<EOF |
9756dfe1 | 2068 | #if defined __PIC__ || defined __pic__ || defined PIC || defined pic |
cc3fa755 UD |
2069 | # error PIC is default. |
2070 | #endif | |
2071 | EOF | |
0b4ee387 | 2072 | if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then |
ff886b82 | 2073 | libc_cv_pic_default=no |
cc3fa755 UD |
2074 | fi |
2075 | rm -f conftest.*]) | |
ff886b82 | 2076 | AC_SUBST(libc_cv_pic_default) |
cc3fa755 | 2077 | |
ff3d7ed3 | 2078 | AC_SUBST(profile) |
5107cf1d | 2079 | AC_SUBST(static_nss) |
ff3d7ed3 | 2080 | |
edf5b2d7 UD |
2081 | AC_SUBST(DEFINES) |
2082 | ||
cb8a6dbd | 2083 | dnl See sysdeps/mach/configure.ac for this variable. |
61c83c3f RM |
2084 | AC_SUBST(mach_interface_list) |
2085 | ||
ee74a442 UD |
2086 | VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h` |
2087 | RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h` | |
df4ef2ab | 2088 | AC_SUBST(VERSION) |
ee74a442 | 2089 | AC_SUBST(RELEASE) |
df4ef2ab | 2090 | |
728e272a | 2091 | AC_CONFIG_FILES([config.make Makefile]) |
c118d634 | 2092 | AC_CONFIG_COMMANDS([default],[[ |
737547be UD |
2093 | case $CONFIG_FILES in *config.make*) |
2094 | echo "$config_vars" >> config.make;; | |
2095 | esac | |
c118d634 RM |
2096 | test -d bits || mkdir bits]],[[config_vars='$config_vars']]) |
2097 | AC_OUTPUT |