]>
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 | |
53 | # We need the C++ compiler only for testing. | |
54 | AC_PROG_CXX | |
0cae3f4b | 55 | AC_CHECK_TOOL(READELF, readelf, false) |
c0bac8b0 | 56 | |
c72637d4 RM |
57 | if test "`cd $srcdir; /bin/pwd`" = "`/bin/pwd`"; then |
58 | AC_MSG_ERROR([you must configure in a separate build directory]) | |
59 | fi | |
60 | ||
28f540f4 RM |
61 | # This will get text that should go into config.make. |
62 | config_vars= | |
63 | ||
c8f3e6db | 64 | # Check for a --with-gd argument and set libgd-LDFLAGS in config.make. |
6b7f6183 | 65 | AC_ARG_WITH([gd], |
77e8bddf AS |
66 | AC_HELP_STRING([--with-gd=DIR], |
67 | [find libgd include dir and library with prefix DIR]), | |
c8f3e6db UD |
68 | [dnl |
69 | case "$with_gd" in | |
f5f7239f UD |
70 | yes|''|no) ;; |
71 | *) libgd_include="-I$withval/include" | |
c8f3e6db UD |
72 | libgd_ldflags="-L$withval/lib" ;; |
73 | esac | |
74 | ]) | |
6b7f6183 | 75 | AC_ARG_WITH([gd-include], |
77e8bddf AS |
76 | AC_HELP_STRING([--with-gd-include=DIR], |
77 | [find libgd include files in DIR]), | |
78 | [dnl | |
f5f7239f UD |
79 | case "$with_gd_include" in |
80 | ''|no) ;; | |
81 | *) libgd_include="-I$withval" ;; | |
82 | esac | |
83 | ]) | |
6b7f6183 | 84 | AC_ARG_WITH([gd-lib], |
77e8bddf AS |
85 | AC_HELP_STRING([--with-gd-lib=DIR], |
86 | [find libgd library files in DIR]), | |
87 | [dnl | |
f5f7239f UD |
88 | case "$with_gd_lib" in |
89 | ''|no) ;; | |
90 | *) libgd_ldflags="-L$withval" ;; | |
91 | esac | |
92 | ]) | |
93 | ||
94 | if test -n "$libgd_include"; then | |
95 | config_vars="$config_vars | |
cf90163d | 96 | CFLAGS-memusagestat.c = $libgd_include" |
f5f7239f UD |
97 | fi |
98 | if test -n "$libgd_ldflags"; then | |
99 | config_vars="$config_vars | |
100 | libgd-LDFLAGS = $libgd_ldflags" | |
101 | fi | |
28f540f4 | 102 | |
ff3d7ed3 | 103 | dnl Arguments to specify presence of other packages/features. |
6b7f6183 | 104 | AC_ARG_WITH([fp], |
77e8bddf AS |
105 | AC_HELP_STRING([--with-fp], |
106 | [if using floating-point hardware @<:@default=yes@:>@]), | |
6b7f6183 RM |
107 | [with_fp=$withval], |
108 | [with_fp=yes]) | |
675322a5 | 109 | AC_SUBST(with_fp) |
6b7f6183 | 110 | AC_ARG_WITH([binutils], |
77e8bddf AS |
111 | AC_HELP_STRING([--with-binutils=PATH], |
112 | [specify location of binutils (as and ld)]), | |
6b7f6183 RM |
113 | [path_binutils=$withval], |
114 | [path_binutils='']) | |
2fff3d93 | 115 | AC_ARG_WITH([selinux], |
77e8bddf AS |
116 | AC_HELP_STRING([--with-selinux], |
117 | [if building with SELinux support]), | |
2fff3d93 UD |
118 | [with_selinux=$withval], |
119 | [with_selinux=auto]) | |
28f540f4 | 120 | |
6b7f6183 | 121 | AC_ARG_WITH([headers], |
77e8bddf AS |
122 | AC_HELP_STRING([--with-headers=PATH], |
123 | [location of system headers to use | |
6b7f6183 RM |
124 | (for example /usr/src/linux/include) |
125 | @<:@default=compiler default@:>@]), | |
126 | [sysheaders=$withval], | |
127 | [sysheaders='']) | |
c91c505f | 128 | AC_SUBST(sysheaders) |
dbe7a0f5 | 129 | |
f781ef40 RM |
130 | AC_SUBST(use_default_link) |
131 | AC_ARG_WITH([default-link], | |
132 | AC_HELP_STRING([--with-default-link], | |
fd5e21c7 | 133 | [do not use explicit linker scripts]), |
f781ef40 | 134 | [use_default_link=$withval], |
fd5e21c7 | 135 | [use_default_link=default]) |
f781ef40 | 136 | |
6b7f6183 | 137 | AC_ARG_ENABLE([sanity-checks], |
77e8bddf AS |
138 | AC_HELP_STRING([--disable-sanity-checks], |
139 | [really do not use threads (should not be used except in special situations) @<:@default=yes@:>@]), | |
6b7f6183 RM |
140 | [enable_sanity=$enableval], |
141 | [enable_sanity=yes]) | |
a18f587d | 142 | |
6b7f6183 | 143 | AC_ARG_ENABLE([shared], |
77e8bddf | 144 | AC_HELP_STRING([--enable-shared], |
a0da5fe1 | 145 | [build shared library @<:@default=yes if GNU ld@:>@]), |
6b7f6183 | 146 | [shared=$enableval], |
a0da5fe1 | 147 | [shared=yes]) |
6b7f6183 | 148 | AC_ARG_ENABLE([profile], |
77e8bddf AS |
149 | AC_HELP_STRING([--enable-profile], |
150 | [build profiled library @<:@default=no@:>@]), | |
6b7f6183 | 151 | [profile=$enableval], |
11bf311e | 152 | [profile=no]) |
6b7f6183 | 153 | |
740b3dbe L |
154 | AC_ARG_ENABLE([hardcoded-path-in-tests], |
155 | AC_HELP_STRING([--enable-hardcoded-path-in-tests], | |
156 | [hardcode newly built glibc path in tests @<:@default=no@:>@]), | |
157 | [hardcoded_path_in_tests=$enableval], | |
158 | [hardcoded_path_in_tests=no]) | |
159 | AC_SUBST(hardcoded_path_in_tests) | |
160 | ||
35f1e827 UD |
161 | AC_ARG_ENABLE([stackguard-randomization], |
162 | AC_HELP_STRING([--enable-stackguard-randomization], | |
163 | [initialize __stack_chk_guard canary with a random number at program start]), | |
164 | [enable_stackguard_randomize=$enableval], | |
165 | [enable_stackguard_randomize=no]) | |
166 | if test "$enable_stackguard_randomize" = yes; then | |
167 | AC_DEFINE(ENABLE_STACKGUARD_RANDOMIZE) | |
168 | fi | |
169 | ||
1717da59 AK |
170 | AC_ARG_ENABLE([lock-elision], |
171 | AC_HELP_STRING([--enable-lock-elision[=yes/no]], | |
52dfbe13 | 172 | [Enable lock elision for pthread mutexes by default]), |
1717da59 AK |
173 | [enable_lock_elision=$enableval], |
174 | [enable_lock_elision=no]) | |
5a414ff7 | 175 | AC_SUBST(enable_lock_elision) |
1717da59 AK |
176 | if test "$enable_lock_elision" = yes ; then |
177 | AC_DEFINE(ENABLE_LOCK_ELISION) | |
178 | fi | |
179 | ||
6b3a2224 | 180 | dnl Generic infrastructure for drop-in additions to libc. |
6b7f6183 | 181 | AC_ARG_ENABLE([add-ons], |
77e8bddf AS |
182 | AC_HELP_STRING([--enable-add-ons@<:@=DIRS...@:>@], |
183 | [configure and build add-ons in DIR1,DIR2,... | |
184 | search for add-ons if no parameter given]), | |
e0a3ed4f | 185 | , [enable_add_ons=yes]) |
61952351 | 186 | |
6b7f6183 | 187 | AC_ARG_ENABLE([hidden-plt], |
77e8bddf AS |
188 | AC_HELP_STRING([--disable-hidden-plt], |
189 | [do not hide internal function calls to avoid PLT]), | |
6b7f6183 RM |
190 | [hidden=$enableval], |
191 | [hidden=yes]) | |
749a9a4f RM |
192 | if test "x$hidden" = xno; then |
193 | AC_DEFINE(NO_HIDDEN) | |
194 | fi | |
195 | ||
4df8c11d UD |
196 | AC_ARG_ENABLE([bind-now], |
197 | AC_HELP_STRING([--enable-bind-now], | |
198 | [disable lazy relocations in DSOs]), | |
199 | [bindnow=$enableval], | |
200 | [bindnow=no]) | |
201 | AC_SUBST(bindnow) | |
202 | ||
5107cf1d UD |
203 | dnl On some platforms we cannot use dynamic loading. We must provide |
204 | dnl static NSS modules. | |
6b7f6183 | 205 | AC_ARG_ENABLE([static-nss], |
77e8bddf AS |
206 | AC_HELP_STRING([--enable-static-nss], |
207 | [build static NSS modules @<:@default=no@:>@]), | |
6b7f6183 RM |
208 | [static_nss=$enableval], |
209 | [static_nss=no]) | |
834cef7c UD |
210 | dnl Enable static NSS also if we build no shared objects. |
211 | if test x"$static_nss" = xyes || test x"$shared" = xno; then | |
3172f58f | 212 | static_nss=yes |
5107cf1d UD |
213 | AC_DEFINE(DO_STATIC_NSS) |
214 | fi | |
215 | ||
6b7f6183 | 216 | AC_ARG_ENABLE([force-install], |
77e8bddf AS |
217 | AC_HELP_STRING([--disable-force-install], |
218 | [don't force installation of files from this package, even if they are older than the installed files]), | |
6b7f6183 RM |
219 | [force_install=$enableval], |
220 | [force_install=yes]) | |
73237de3 UD |
221 | AC_SUBST(force_install) |
222 | ||
8894bad3 AM |
223 | AC_ARG_ENABLE([maintainer-mode], |
224 | AC_HELP_STRING([--enable-maintainer-mode], | |
225 | [enable make rules and dependencies not useful (and sometimes confusing) to the casual installer]), | |
226 | [maintainer=$enableval], | |
227 | [maintainer=no]) | |
228 | ||
958f238f UD |
229 | dnl On some platforms we allow dropping compatibility with all kernel |
230 | dnl versions. | |
6b7f6183 | 231 | AC_ARG_ENABLE([kernel], |
77e8bddf AS |
232 | AC_HELP_STRING([--enable-kernel=VERSION], |
233 | [compile for compatibility with kernel not older than VERSION]), | |
6b7f6183 RM |
234 | [minimum_kernel=$enableval], |
235 | []) | |
86cfe82d UD |
236 | dnl Prevent unreasonable values. |
237 | if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then | |
238 | # Better nothing than this. | |
239 | minimum_kernel="" | |
269e369f UD |
240 | else |
241 | if test "$minimum_kernel" = current; then | |
242 | minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel= | |
243 | fi | |
86cfe82d | 244 | fi |
958f238f | 245 | |
6cc7d725 UD |
246 | dnl For the development we sometimes want gcc to issue even more warnings. |
247 | dnl This is not the default since many of the extra warnings are not | |
248 | dnl appropriate. | |
6b7f6183 RM |
249 | AC_ARG_ENABLE([all-warnings], |
250 | AC_HELP_STRING([--enable-all-warnings], | |
77e8bddf | 251 | [enable all useful warnings gcc can issue]), |
6b7f6183 RM |
252 | [all_warnings=$enableval], |
253 | []) | |
6cc7d725 UD |
254 | AC_SUBST(all_warnings) |
255 | ||
a4ecc9eb JM |
256 | AC_ARG_ENABLE([werror], |
257 | AC_HELP_STRING([--disable-werror], | |
258 | [do not build with -Werror]), | |
259 | [enable_werror=$enableval], | |
260 | [enable_werror=yes]) | |
261 | AC_SUBST(enable_werror) | |
262 | ||
425ce2ed UD |
263 | AC_ARG_ENABLE([multi-arch], |
264 | AC_HELP_STRING([--enable-multi-arch], | |
265 | [enable single DSO with optimizations for multiple architectures]), | |
266 | [multi_arch=$enableval], | |
6f89d2f3 | 267 | [multi_arch=default]) |
425ce2ed | 268 | |
ff886b82 UD |
269 | AC_ARG_ENABLE([nss-crypt], |
270 | AC_HELP_STRING([--enable-nss-crypt], | |
271 | [enable libcrypt to use nss]), | |
272 | [nss_crypt=$enableval], | |
273 | [nss_crypt=no]) | |
274 | if test x$nss_crypt = xyes; then | |
275 | nss_includes=-I$(nss-config --includedir 2>/dev/null) | |
276 | if test $? -ne 0; then | |
277 | AC_MSG_ERROR([cannot find include directory with nss-config]) | |
278 | fi | |
279 | old_CFLAGS="$CFLAGS" | |
280 | CFLAGS="$CFLAGS $nss_includes" | |
b68e08db | 281 | AC_COMPILE_IFELSE([AC_LANG_PROGRAM([typedef int PRBool; |
ff886b82 UD |
282 | #include <hasht.h> |
283 | #include <nsslowhash.h> | |
b68e08db | 284 | void f (void) { NSSLOW_Init (); }])], |
ff886b82 UD |
285 | libc_cv_nss_crypt=yes, |
286 | AC_MSG_ERROR([ | |
287 | cannot find NSS headers with lowlevel hash function interfaces])) | |
288 | old_LIBS="$LIBS" | |
289 | LIBS="$LIBS -lfreebl3" | |
290 | AC_LINK_IFELSE([AC_LANG_PROGRAM([typedef int PRBool; | |
291 | #include <hasht.h> | |
292 | #include <nsslowhash.h>], | |
293 | [NSSLOW_Init();])], | |
294 | libc_cv_nss_crypt=yes, | |
295 | AC_MSG_ERROR([ | |
296 | cannot link program using lowlevel NSS hash functions])) | |
297 | CFLAGS="$old_CFLAGS" | |
298 | LIBS="$old_LIBS" | |
299 | else | |
300 | libc_cv_nss_crypt=no | |
301 | fi | |
302 | AC_SUBST(libc_cv_nss_crypt) | |
303 | ||
3a097cc7 | 304 | |
021db4be AJ |
305 | AC_ARG_ENABLE([obsolete-rpc], |
306 | AC_HELP_STRING([--enable-obsolete-rpc], | |
307 | [build and install the obsolete RPC code for link-time usage]), | |
308 | [link_obsolete_rpc=$enableval], | |
309 | [link_obsolete_rpc=no]) | |
310 | AC_SUBST(link_obsolete_rpc) | |
311 | ||
312 | if test "$link_obsolete_rpc" = yes; then | |
313 | AC_DEFINE(LINK_OBSOLETE_RPC) | |
314 | fi | |
315 | ||
3a097cc7 RM |
316 | AC_ARG_ENABLE([systemtap], |
317 | [AS_HELP_STRING([--enable-systemtap], | |
318 | [enable systemtap static probe points @<:@default=no@:>@])], | |
319 | [systemtap=$enableval], | |
320 | [systemtap=no]) | |
321 | if test "x$systemtap" != xno; then | |
322 | AC_CACHE_CHECK([for systemtap static probe support], libc_cv_sdt, [dnl | |
323 | old_CFLAGS="$CFLAGS" | |
324 | CFLAGS="-std=gnu99 $CFLAGS" | |
0e3933b9 | 325 | AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#include <sys/sdt.h> |
3a097cc7 RM |
326 | void foo (int i, void *p) |
327 | { | |
328 | asm ("" STAP_PROBE_ASM (foo, bar, STAP_PROBE_ASM_TEMPLATE (2)) "" | |
329 | :: STAP_PROBE_ASM_OPERANDS (2, i, p)); | |
0e3933b9 | 330 | }]])], [libc_cv_sdt=yes], [libc_cv_sdt=no]) |
3a097cc7 RM |
331 | CFLAGS="$old_CFLAGS"]) |
332 | if test $libc_cv_sdt = yes; then | |
333 | AC_DEFINE([USE_STAP_PROBE]) | |
334 | elif test "x$systemtap" != xauto; then | |
335 | AC_MSG_FAILURE([systemtap support needs sys/sdt.h with asm support]) | |
336 | fi | |
337 | fi | |
338 | ||
c53d909c RM |
339 | AC_ARG_ENABLE([build-nscd], |
340 | [AS_HELP_STRING([--disable-build-nscd], | |
341 | [disable building and installing the nscd daemon])], | |
342 | [build_nscd=$enableval], | |
343 | [build_nscd=default]) | |
344 | AC_SUBST(build_nscd) | |
345 | ||
3cc3ef96 RM |
346 | # Note the use of $use_nscd is near the bottom of the file. |
347 | AC_ARG_ENABLE([nscd], | |
348 | [AS_HELP_STRING([--disable-nscd], | |
349 | [library functions will not contact the nscd daemon])], | |
350 | [use_nscd=$enableval], | |
351 | [use_nscd=yes]) | |
352 | ||
e4608715 CD |
353 | AC_ARG_ENABLE([pt_chown], |
354 | [AS_HELP_STRING([--enable-pt_chown], | |
355 | [Enable building and installing pt_chown])], | |
356 | [build_pt_chown=$enableval], | |
357 | [build_pt_chown=no]) | |
358 | AC_SUBST(build_pt_chown) | |
8c12f01d | 359 | if test "$build_pt_chown" = yes; then |
e4608715 CD |
360 | AC_DEFINE(HAVE_PT_CHOWN) |
361 | fi | |
362 | ||
28f540f4 RM |
363 | # We keep the original values in `$config_*' and never modify them, so we |
364 | # can write them unchanged into config.make. Everything else uses | |
365 | # $machine, $vendor, and $os, and changes them whenever convenient. | |
366 | config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os | |
367 | ||
2f64b655 UD |
368 | # Don't allow vendor == "unknown" |
369 | test "$config_vendor" = unknown && config_vendor= | |
370 | config_os="`echo $config_os | sed 's/^unknown-//'`" | |
371 | ||
a2fe9c76 | 372 | # Some configurations imply other options. |
0269750c | 373 | elf=yes |
a2fe9c76 | 374 | |
8f73811b RM |
375 | # The configure fragment of an add-on port can modify these to supplement |
376 | # or override the table in the case statement below. No fragment should | |
377 | # ever change the config_* variables, however. | |
28f540f4 RM |
378 | machine=$config_machine |
379 | vendor=$config_vendor | |
380 | os=$config_os | |
b22d21b3 | 381 | base_os='' |
28f540f4 | 382 | |
2ceaa76a RM |
383 | submachine= |
384 | AC_ARG_WITH([cpu], | |
385 | AS_HELP_STRING([--with-cpu=CPU], [select code for CPU variant]), | |
386 | [dnl | |
387 | case "$withval" in | |
388 | yes|'') AC_MSG_ERROR([--with-cpu requires an argument]) ;; | |
389 | no) ;; | |
390 | *) submachine="$withval" ;; | |
391 | esac | |
392 | ]) | |
393 | ||
10a803e0 RM |
394 | dnl Let sysdeps/*/preconfigure act here, like they can in add-ons. |
395 | LIBC_PRECONFIGURE([$srcdir], [for sysdeps]) | |
396 | ||
e0a3ed4f | 397 | # An add-on can set this when it wants to disable the sanity check below. |
8f73811b RM |
398 | libc_config_ok=no |
399 | ||
400 | dnl Having this here, though empty, makes sure that if add-ons' fragments | |
401 | dnl do AC_CONFIG_SUBDIRS([some-dir]), which just sets $subdirs, then | |
402 | dnl our AC_OUTPUT will actually use it. | |
403 | AC_CONFIG_SUBDIRS() | |
404 | ||
e0a3ed4f RM |
405 | case "$enable_add_ons" in |
406 | ''|no) add_ons= ;; | |
407 | yes|'*') | |
408 | add_ons=`cd $srcdir && ls -d 2> /dev/null */configure */sysdeps | | |
409 | sed 's@/[[^/]]*$@@' | sort | uniq` | |
410 | add_ons_automatic=yes | |
411 | ;; | |
412 | *) add_ons=`echo "$enable_add_ons" | sed 's/,/ /g'` | |
413 | add_ons_automatic=no ;; | |
414 | esac | |
415 | ||
416 | configured_add_ons= | |
8f73811b RM |
417 | add_ons_sfx= |
418 | add_ons_pfx= | |
419 | if test x"$add_ons" != x; then | |
420 | for f in $add_ons; do | |
421 | # Some sanity checks | |
422 | case "$f" in | |
423 | crypt) | |
424 | AC_MSG_ERROR([ | |
425 | *** It seems that you're using an old \`crypt' add-on. crypt is now | |
426 | *** part of glibc and using the old add-on will not work with this | |
427 | *** release. Start again with fresh sources and without the old | |
428 | *** \`crypt' add-on.]) | |
429 | ;; | |
430 | localedata) | |
431 | AC_MSG_ERROR([ | |
432 | *** It seems that you're using an old \`localedata' add-on. localedata | |
433 | *** is now part of glibc and using the old add-on will not work with | |
434 | *** this release. Start again with fresh sources and without the old | |
435 | *** \`localedata' add-on.]) | |
436 | ;; | |
437 | esac | |
8f73811b RM |
438 | done |
439 | ||
9382fcee | 440 | # Now source each add-on's configure fragment. |
c80e931a RM |
441 | # The fragments can use $srcdir/$libc_add_on to find themselves, |
442 | # and test $add_ons_automatic to see if they were explicitly requested. | |
443 | # A fragment can clear (or even change) $libc_add_on to affect | |
444 | # whether it goes into the list to be actually used in the build. | |
445 | use_add_ons= | |
9382fcee | 446 | for libc_add_on in $add_ons; do |
e0a3ed4f RM |
447 | # Test whether such a directory really exists. |
448 | # It can be absolute, or relative to $srcdir, or relative to the build dir. | |
449 | case "$libc_add_on" in | |
450 | /*) | |
451 | libc_add_on_srcdir=$libc_add_on | |
452 | ;; | |
453 | *) | |
454 | test -d "$srcdir/$libc_add_on" || { | |
77e8bddf | 455 | if test -d "$libc_add_on"; then |
e0a3ed4f RM |
456 | libc_add_on="`pwd`/$libc_add_on" |
457 | else | |
458 | AC_MSG_ERROR(add-on directory \"$libc_add_on\" does not exist) | |
459 | fi | |
460 | } | |
461 | libc_add_on_srcdir=$srcdir/$libc_add_on | |
462 | ;; | |
463 | esac | |
464 | ||
465 | libc_add_on_frag=$libc_add_on_srcdir/configure | |
466 | libc_add_on_canonical= | |
7967983f | 467 | libc_add_on_config_subdirs= |
e0a3ed4f RM |
468 | if test -r "$libc_add_on_frag"; then |
469 | AC_MSG_NOTICE(running configure fragment for add-on $libc_add_on) | |
470 | libc_add_on_canonical=unknown | |
471 | libc_add_on_subdirs= | |
472 | . "$libc_add_on_frag" | |
473 | test -z "$libc_add_on" || { | |
77e8bddf | 474 | configured_add_ons="$configured_add_ons $libc_add_on" |
e0a3ed4f RM |
475 | if test "x$libc_add_on_canonical" = xunknown; then |
476 | AC_MSG_ERROR(fragment must set \$libc_add_on_canonical) | |
477 | fi | |
478 | for d in $libc_add_on_subdirs; do | |
479 | case "$libc_add_on" in | |
480 | /*) subdir_srcdir="$libc_add_on" ;; | |
481 | *) subdir_srcdir="\$(..)$libc_add_on" ;; | |
482 | esac | |
483 | case "$d" in | |
484 | .) | |
485 | d="${libc_add_on_canonical:-$libc_add_on}" | |
486 | ;; | |
487 | /*) | |
488 | subdir_srcdir="$d" | |
489 | ;; | |
490 | *) | |
491 | subdir_srcdir="$subdir_srcdir/$d" | |
492 | ;; | |
493 | esac | |
494 | d=`echo "$d" | sed 's@/*$@@;s@^.*/@@'` | |
495 | add_on_subdirs="$add_on_subdirs $d" | |
496 | test "$subdir_srcdir" = "\$(..)$d" || config_vars="$config_vars | |
497 | $d-srcdir = $subdir_srcdir" | |
498 | done | |
7967983f RM |
499 | for d in $libc_add_on_config_subdirs; do |
500 | case "$d" in | |
501 | /*) AC_MSG_ERROR(dnl | |
502 | fragment uses absolute path in \$libc_add_on_config_subdirs) ;; | |
503 | esac | |
504 | if test ! -d "$libc_add_on_srcdir/$d"; then | |
505 | AC_MSG_ERROR(fragment wants to configure missing directory $d) | |
506 | fi | |
507 | case "$libc_add_on" in | |
508 | /*) AC_MSG_ERROR(dnl | |
509 | relative path required for add-on using \$libc_add_on_config_subdirs) ;; | |
510 | esac | |
511 | subdirs="$subdirs $libc_add_on/$d" | |
512 | done | |
e0a3ed4f | 513 | } |
8f73811b | 514 | fi |
619f9448 | 515 | if test -n "$libc_add_on"; then |
10a803e0 | 516 | LIBC_PRECONFIGURE([$libc_add_on_srcdir], [add-on $libc_add_on for]) |
619f9448 RM |
517 | use_add_ons="$use_add_ons $libc_add_on" |
518 | add_ons_pfx="$add_ons_pfx $libc_add_on/" | |
e0a3ed4f RM |
519 | test -z "$libc_add_on_canonical" || |
520 | add_ons_sfx="$add_ons_sfx /$libc_add_on_canonical" | |
619f9448 | 521 | fi |
8f73811b | 522 | done |
c80e931a RM |
523 | # Use echo to strip excess whitespace. |
524 | add_ons="`echo $use_add_ons`" | |
8f73811b RM |
525 | fi |
526 | AC_SUBST(add_ons) | |
e0a3ed4f | 527 | AC_SUBST(add_on_subdirs) |
8f73811b RM |
528 | |
529 | ||
bdc8eb03 UD |
530 | ### |
531 | ### I put this here to prevent those annoying emails from people who cannot | |
532 | ### read and try to compile glibc on unsupported platforms. --drepper | |
533 | ### | |
534 | ### By using the undocumented --enable-hacker-mode option for configure | |
535 | ### one can skip this test to make the configuration not fail for unsupported | |
536 | ### platforms. | |
537 | ### | |
8f73811b | 538 | if test -z "$enable_hacker_mode" && test x"$libc_config_ok" != xyes; then |
bdc8eb03 | 539 | case "$machine-$host_os" in |
2ce4f015 | 540 | *-linux* | *-gnu*) |
bdc8eb03 UD |
541 | ;; |
542 | *) | |
543 | echo "*** The GNU C library is currently not available for this platform." | |
544 | echo "*** So far nobody cared to port it and if there is no volunteer it" | |
545 | echo "*** might never happen. So, if you have interest to see glibc on" | |
546 | echo "*** this platform visit" | |
547 | echo "*** http://www.gnu.org/software/libc/porting.html" | |
548 | echo "*** and join the group of porters" | |
549 | exit 1 | |
550 | ;; | |
551 | esac | |
552 | fi | |
553 | ||
3e239be6 JM |
554 | # Set base_machine if not set by a preconfigure fragment. |
555 | test -n "$base_machine" || base_machine=$machine | |
f0523145 | 556 | AC_SUBST(base_machine) |
28f540f4 | 557 | |
0cae3f4b MF |
558 | # For the multi-arch option we need support in the assembler & linker. |
559 | AC_CACHE_CHECK([for assembler and linker STT_GNU_IFUNC support], | |
560 | libc_cv_ld_gnu_indirect_function, [dnl | |
786b0b67 | 561 | cat > conftest.S <<EOF |
84b9230c | 562 | .type foo,%gnu_indirect_function |
0cae3f4b MF |
563 | foo: |
564 | .globl _start | |
565 | _start: | |
566 | .globl __start | |
567 | __start: | |
568 | .data | |
786b0b67 AS |
569 | #ifdef _LP64 |
570 | .quad foo | |
571 | #else | |
0cae3f4b | 572 | .long foo |
786b0b67 | 573 | #endif |
84b9230c | 574 | EOF |
0cae3f4b MF |
575 | libc_cv_ld_gnu_indirect_function=no |
576 | if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \ | |
577 | -nostartfiles -nostdlib \ | |
786b0b67 | 578 | -o conftest conftest.S 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then |
0cae3f4b MF |
579 | # Do a link to see if the backend supports IFUNC relocs. |
580 | $READELF -r conftest 1>&AS_MESSAGE_LOG_FD | |
581 | LC_ALL=C $READELF -r conftest | grep 'no relocations' >/dev/null || { | |
582 | libc_cv_ld_gnu_indirect_function=yes | |
583 | } | |
84b9230c MF |
584 | fi |
585 | rm -f conftest*]) | |
586 | ||
587 | AC_MSG_CHECKING(whether .text pseudo-op must be used) | |
588 | AC_CACHE_VAL(libc_cv_dot_text, [dnl | |
589 | cat > conftest.s <<EOF | |
590 | .text | |
591 | EOF | |
592 | libc_cv_dot_text= | |
593 | if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then | |
594 | libc_cv_dot_text=.text | |
595 | fi | |
596 | rm -f conftest*]) | |
597 | if test -z "$libc_cv_dot_text"; then | |
598 | AC_MSG_RESULT(no) | |
599 | else | |
600 | AC_MSG_RESULT(yes) | |
601 | fi | |
602 | ||
0cae3f4b | 603 | if test x"$libc_cv_ld_gnu_indirect_function" != xyes; then |
84b9230c MF |
604 | if test x"$multi_arch" = xyes; then |
605 | AC_MSG_ERROR([--enable-multi-arch support requires assembler and linker support]) | |
606 | else | |
607 | multi_arch=no | |
608 | fi | |
609 | fi | |
6270516e | 610 | multi_arch_d= |
84b9230c MF |
611 | if test x"$multi_arch" != xno; then |
612 | multi_arch_d=/multiarch | |
613 | fi | |
614 | ||
f0523145 | 615 | # Compute the list of sysdep directories for this configuration. |
f332db02 | 616 | # This can take a while to compute. |
f0523145 | 617 | sysdep_dir=$srcdir/sysdeps |
f332db02 | 618 | AC_MSG_CHECKING(sysdep dirs) |
f0523145 RM |
619 | dnl We need to use [ and ] for other purposes for a while now. |
620 | changequote(,)dnl | |
28f540f4 RM |
621 | # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1. |
622 | os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`" | |
623 | ||
b22d21b3 | 624 | test "x$base_os" != x || case "$os" in |
28f540f4 RM |
625 | gnu*) |
626 | base_os=mach/hurd ;; | |
2ce4f015 | 627 | linux*) |
28f540f4 | 628 | base_os=unix/sysv ;; |
28f540f4 RM |
629 | esac |
630 | ||
631 | # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos. | |
632 | tail=$os | |
633 | ostry=$os | |
634 | while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do | |
635 | ostry="$ostry /$o" | |
636 | tail=$o | |
75914335 | 637 | done |
28f540f4 RM |
638 | o=`echo $tail | sed 's/[0-9]*$//'` |
639 | if test $o != $tail; then | |
640 | ostry="$ostry /$o" | |
641 | fi | |
ec4b0518 UD |
642 | # For linux-gnu, try linux-gnu, then linux. |
643 | o=`echo $tail | sed 's/-.*$//'` | |
644 | if test $o != $tail; then | |
645 | ostry="$ostry /$o" | |
646 | fi | |
28f540f4 RM |
647 | |
648 | # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix. | |
649 | base= | |
650 | tail=$base_os | |
651 | while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do | |
652 | set $b | |
653 | base="$base /$1" | |
654 | tail="$2" | |
655 | done | |
656 | ||
ae6b8730 | 657 | # For sparc/sparc32, try sparc/sparc32 and then sparc. |
28f540f4 | 658 | mach= |
2ceaa76a | 659 | tail=$machine${submachine:+/$submachine} |
28f540f4 RM |
660 | while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do |
661 | set $m | |
10ceac89 RM |
662 | # Prepend the machine's FPU directory unless --without-fp. |
663 | if test "$with_fp" = yes; then | |
6270516e | 664 | maybe_fpu=/fpu |
f4b07664 | 665 | else |
6270516e | 666 | maybe_fpu=/nofpu |
82d00cab | 667 | fi |
6270516e RM |
668 | # For each machine term, try it with and then without /multiarch. |
669 | for try_fpu in $maybe_fpu ''; do | |
670 | for try_multi in $multi_arch_d ''; do | |
671 | mach="$mach /$1$try_fpu$try_multi" | |
672 | done | |
673 | done | |
28f540f4 RM |
674 | tail="$2" |
675 | done | |
676 | ||
677 | dnl We are done with glob and regexp uses of [ and ]; return to autoconf. | |
678 | changequote([,])dnl | |
679 | ||
680 | # Find what sysdep directories exist. | |
e0a3ed4f | 681 | sysnames_add_ons= |
28f540f4 | 682 | sysnames= |
4b69abad RM |
683 | for b in $base ''; do |
684 | for m0 in $mach ''; do | |
685 | for v in /$vendor ''; do | |
686 | test "$v" = / && continue | |
687 | for o in /$ostry ''; do | |
688 | test "$o" = / && continue | |
6270516e | 689 | for m in $mach ''; do |
4b69abad | 690 | for d in $add_ons_pfx ''; do |
8f73811b | 691 | for a in $add_ons_sfx ''; do |
1c9f1a02 RM |
692 | try_suffix="$m0$b$v$o$m" |
693 | if test -n "$try_suffix"; then | |
77e8bddf AS |
694 | try_srcdir="${srcdir}/" |
695 | case "$d" in | |
e0a3ed4f RM |
696 | /*) try_srcdir= ;; |
697 | esac | |
1c9f1a02 | 698 | try="${d}sysdeps$try_suffix$a" |
8f73811b RM |
699 | test -n "$enable_debug_configure" && |
700 | echo "$0 [DEBUG]: try $try" >&2 | |
e0a3ed4f | 701 | if test -d "$try_srcdir$try"; then |
8f73811b RM |
702 | sysnames="$sysnames $try" |
703 | { test -n "$o" || test -n "$b"; } && os_used=t | |
704 | { test -n "$m" || test -n "$m0"; } && machine_used=t | |
4b69abad RM |
705 | case x${m0:-$m} in |
706 | x*/$submachine) submachine_used=t ;; | |
707 | esac | |
e0a3ed4f RM |
708 | if test -n "$d"; then |
709 | case "$sysnames_add_ons" in | |
710 | *" $d "*) ;; | |
711 | *|'') sysnames_add_ons="$sysnames_add_ons $d" ;; | |
712 | esac | |
713 | fi | |
8f73811b | 714 | fi |
57ba7bb4 | 715 | fi |
8f73811b | 716 | done |
57ba7bb4 | 717 | done |
28f540f4 RM |
718 | done |
719 | done | |
720 | done | |
721 | done | |
4b69abad | 722 | done |
28f540f4 | 723 | |
6f89d2f3 L |
724 | # If the assembler supports gnu_indirect_function symbol type and the |
725 | # architecture supports multi-arch, we enable multi-arch by default. | |
84b9230c MF |
726 | case $sysnames_add_ons$sysnames in |
727 | *"$multi_arch_d"*) | |
728 | ;; | |
729 | *) | |
77e8bddf | 730 | test x"$multi_arch" = xdefault && multi_arch=no |
84b9230c MF |
731 | ;; |
732 | esac | |
733 | if test x"$multi_arch" != xno; then | |
6f89d2f3 L |
734 | AC_DEFINE(USE_MULTIARCH) |
735 | fi | |
736 | AC_SUBST(multi_arch) | |
737 | ||
28f540f4 RM |
738 | if test -z "$os_used" && test "$os" != none; then |
739 | AC_MSG_ERROR(Operating system $os is not supported.) | |
740 | fi | |
741 | if test -z "$machine_used" && test "$machine" != none; then | |
742 | AC_MSG_ERROR(The $machine is not supported.) | |
743 | fi | |
2ceaa76a RM |
744 | if test -z "$submachine_used" && test -n "$submachine"; then |
745 | AC_MSG_ERROR(The $submachine subspecies of $host_cpu is not supported.) | |
746 | fi | |
747 | AC_SUBST(submachine) | |
28f540f4 RM |
748 | |
749 | # We have now validated the configuration. | |
750 | ||
28f540f4 RM |
751 | # Expand the list of system names into a full list of directories |
752 | # from each element's parent name and Implies file (if present). | |
753 | set $sysnames | |
e50ec9f9 | 754 | names= |
28f540f4 RM |
755 | while test $# -gt 0; do |
756 | name=$1 | |
757 | shift | |
758 | ||
e50ec9f9 | 759 | case " $names " in *" $name "*) |
f332db02 RM |
760 | # Already in the list. |
761 | continue | |
e50ec9f9 | 762 | esac |
f332db02 RM |
763 | |
764 | # Report each name as we discover it, so there is no long pause in output. | |
0b4ee387 | 765 | echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD |
f332db02 | 766 | |
57ba7bb4 UD |
767 | name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'` |
768 | ||
769 | case $name in | |
770 | /*) xsrcdir= ;; | |
771 | *) xsrcdir=$srcdir/ ;; | |
772 | esac | |
773 | test -n "$enable_debug_configure" && | |
774 | echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2 | |
775 | ||
ba75122d RM |
776 | for implies_file in Implies Implies-before Implies-after; do |
777 | implies_type=`echo $implies_file | sed s/-/_/` | |
778 | eval ${implies_type}= | |
779 | if test -f $xsrcdir$name/$implies_file; then | |
780 | # Collect more names from the `Implies' file (removing comments). | |
781 | implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/$implies_file`" | |
782 | for x in $implied_candidate; do | |
783 | found=no | |
784 | if test -d $xsrcdir$name_base/$x; then | |
785 | eval "${implies_type}=\"\$${implies_type} \$name_base/\$x\"" | |
636ccfc8 | 786 | found=yes |
ba75122d RM |
787 | fi |
788 | for d in $add_ons_pfx ''; do | |
789 | try="${d}sysdeps/$x" | |
790 | case $d in | |
791 | /*) try_srcdir= ;; | |
792 | *) try_srcdir=$srcdir/ ;; | |
e0a3ed4f | 793 | esac |
ba75122d RM |
794 | test -n "$enable_debug_configure" && |
795 | echo "[DEBUG]: $name $implies_file $x try($d) {$try_srcdir}$try" >&2 | |
796 | if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try; | |
797 | then | |
798 | eval "${implies_type}=\"\$${implies_type} \$try\"" | |
799 | found=yes | |
800 | case "$sysnames_add_ons" in | |
801 | *" $d "*) ;; | |
802 | *|'') sysnames_add_ons="$sysnames_add_ons $d" ;; | |
803 | esac | |
804 | fi | |
805 | done | |
806 | if test $found = no; then | |
807 | AC_MSG_WARN($name/$implies_file specifies nonexistent $x) | |
636ccfc8 UD |
808 | fi |
809 | done | |
ba75122d RM |
810 | fi |
811 | done | |
28f540f4 RM |
812 | |
813 | # Add NAME to the list of names. | |
814 | names="$names $name" | |
815 | ||
816 | # Find the parent of NAME, using the empty string if it has none. | |
817 | changequote(,)dnl | |
57ba7bb4 | 818 | parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`" |
28f540f4 RM |
819 | changequote([,])dnl |
820 | ||
ba75122d RM |
821 | test -n "$enable_debug_configure" && |
822 | echo "[DEBUG]: $name Implies='$Implies' rest='$*' parent='$parent' \ | |
57633811 | 823 | Implies_before='$Implies_before' Implies_after='$Implies_after'" >&2 |
ba75122d | 824 | |
28f540f4 RM |
825 | # Add the names implied by NAME, and NAME's parent (if it has one), to |
826 | # the list of names to be processed (the argument list). We prepend the | |
827 | # implied names to the list and append the parent. We want implied | |
828 | # directories to come before further directories inferred from the | |
829 | # configuration components; this ensures that for sysv4, unix/common | |
830 | # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*) | |
831 | # after sysv4). | |
ba75122d | 832 | sysnames="`echo $Implies $* $Implies_before $parent $Implies_after`" |
28f540f4 RM |
833 | test -n "$sysnames" && set $sysnames |
834 | done | |
835 | ||
836 | # Add the default directories. | |
83ef87ba | 837 | default_sysnames="sysdeps/generic" |
ecdc196c | 838 | sysnames="$names $default_sysnames" |
f332db02 RM |
839 | AC_SUBST(sysnames) |
840 | # The other names were emitted during the scan. | |
ecdc196c | 841 | AC_MSG_RESULT($default_sysnames) |
28f540f4 | 842 | |
e0a3ed4f RM |
843 | # Collect the list of add-ons that supply partial sysdeps trees. |
844 | sysdeps_add_ons= | |
845 | for add_on in $add_ons; do | |
846 | case "$add_on" in | |
847 | /*) xsrcdir= ;; | |
848 | *) xsrcdir="$srcdir/" ;; | |
849 | esac | |
850 | ||
851 | test -d "$xsrcdir$add_on/sysdeps" || { | |
852 | case "$configured_add_ons " in | |
853 | *" $add_on "*) ;; | |
854 | *|'') | |
855 | AC_MSG_ERROR(add-on $add_on has no configure fragment or sysdeps tree) | |
856 | ;; | |
857 | esac | |
858 | continue | |
859 | } | |
860 | ||
861 | sysdeps_add_ons="$sysdeps_add_ons $add_on" | |
862 | case "$sysnames_add_ons" in | |
863 | *" $add_on/ "*) ;; | |
864 | *|'') | |
865 | AC_MSG_WARN(add-on $add_on contributed no sysdeps directories) | |
866 | continue ;; | |
867 | esac | |
868 | ||
869 | found=no | |
870 | for d in $sysnames; do | |
871 | case "$d" in | |
872 | $add_on/sysdeps/*) ;; | |
873 | *) continue ;; | |
874 | esac | |
875 | (cd "$xsrcdir$d" && for f in *[[!~]]; do | |
876 | case "$f" in | |
877 | sys|bits) | |
878 | for ff in $f/*.h; do | |
879 | test -d "$ff" || { test -e "$ff" && exit 88; } | |
880 | done | |
881 | ;; | |
882 | *) | |
77e8bddf | 883 | test -d "$f" || { test -e "$f" && exit 88; } |
e0a3ed4f RM |
884 | ;; |
885 | esac | |
886 | done) | |
887 | if test $? -eq 88; then | |
888 | found=yes | |
889 | break | |
890 | fi | |
891 | done | |
892 | if test $found = no; then | |
893 | AC_MSG_WARN(add-on $add_on contributed no useful sysdeps directories) | |
894 | fi | |
895 | done | |
896 | AC_SUBST(sysdeps_add_ons) | |
897 | ||
f332db02 RM |
898 | |
899 | ### Locate tools. | |
28f540f4 | 900 | |
28f540f4 | 901 | AC_PROG_INSTALL |
2b80a372 | 902 | if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then |
28f540f4 | 903 | # The makefiles need to use a different form to find it in $srcdir. |
2b80a372 | 904 | INSTALL='\$(..)./scripts/install-sh -c' |
28f540f4 | 905 | fi |
0e3426bb | 906 | AC_PROG_LN_S |
ae828bc6 | 907 | |
4baa087a | 908 | LIBC_PROG_BINUTILS |
4baa087a | 909 | |
bd805071 | 910 | # Accept binutils 2.22 or newer. |
4baa087a RM |
911 | AC_CHECK_PROG_VER(AS, $AS, --version, |
912 | [GNU assembler.* \([0-9]*\.[0-9.]*\)], | |
bd805071 AS |
913 | [2.1[0-9][0-9]*|2.2[2-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*], |
914 | AS=: critic_missing="$critic_missing as") | |
4baa087a RM |
915 | AC_CHECK_PROG_VER(LD, $LD, --version, |
916 | [GNU ld.* \([0-9][0-9]*\.[0-9.]*\)], | |
bd805071 AS |
917 | [2.1[0-9][0-9]*|2.2[2-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*], |
918 | LD=: critic_missing="$critic_missing ld") | |
4baa087a | 919 | |
63bda0c1 | 920 | # These programs are version sensitive. |
3a12e572 | 921 | AC_CHECK_TOOL_PREFIX |
22e65f8f | 922 | AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version, |
8fc1e2ca | 923 | [GNU Make[^0-9]*\([0-9][0-9.]*\)], |
28d708c4 | 924 | [3.79* | 3.[89]* | [4-9].* | [1-9][0-9]*], critic_missing="$critic_missing make") |
63bda0c1 | 925 | |
22e65f8f | 926 | AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version, |
bdd421cc | 927 | [GNU gettext.* \([0-9]*\.[0-9.]*\)], |
aefdff34 RM |
928 | [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*], |
929 | MSGFMT=: aux_missing="$aux_missing msgfmt") | |
63bda0c1 | 930 | AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version, |
8b7fb588 | 931 | [GNU texinfo.* \([0-9][0-9.]*\)], |
3a12c70f | 932 | [4.[7-9]*|4.[1-9][0-9]*|[5-9].*], |
aefdff34 | 933 | MAKEINFO=: aux_missing="$aux_missing makeinfo") |
d6a97a28 | 934 | AC_CHECK_PROG_VER(SED, sed, --version, |
07e51550 | 935 | [GNU sed[^0-9]* \([0-9]*\.[0-9.]*\)], |
aefdff34 RM |
936 | [3.0[2-9]*|3.[1-9]*|[4-9]*], |
937 | SED=: aux_missing="$aux_missing sed") | |
0786794f AM |
938 | AC_CHECK_PROG_VER(AWK, gawk, --version, |
939 | [GNU Awk[^0-9]*\([0-9][0-9.]*\)], | |
12086fb4 | 940 | [3.1.[2-9]*|3.[2-9]*|[4-9]*], critic_missing="$critic_missing gawk") |
63bda0c1 | 941 | |
461a7b1e RM |
942 | AC_CACHE_CHECK([if $CC is sufficient to build libc], libc_cv_compiler_ok, [ |
943 | AC_TRY_COMPILE([], [ | |
4863355a | 944 | #if !defined __GNUC__ || __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 6) |
461a7b1e RM |
945 | #error insufficient compiler |
946 | #endif], | |
947 | [libc_cv_compiler_ok=yes], | |
948 | [libc_cv_compiler_ok=no])]) | |
949 | AS_IF([test $libc_cv_compiler_ok != yes], | |
950 | [critic_missing="$critic_missing compiler"]) | |
951 | ||
30b99d79 | 952 | AC_CHECK_TOOL(NM, nm, false) |
d30cf5bb | 953 | |
8894bad3 AM |
954 | if test "x$maintainer" = "xyes"; then |
955 | AC_CHECK_PROGS(AUTOCONF, autoconf, no) | |
956 | case "x$AUTOCONF" in | |
957 | xno|x|x:) AUTOCONF=no ;; | |
958 | *) | |
959 | AC_CACHE_CHECK(dnl | |
960 | whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl | |
961 | if (cd $srcdir; $AUTOCONF $ACFLAGS configure.ac > /dev/null 2>&1); then | |
962 | libc_cv_autoconf_works=yes | |
963 | else | |
964 | libc_cv_autoconf_works=no | |
965 | fi]) | |
966 | test $libc_cv_autoconf_works = yes || AUTOCONF=no | |
967 | ;; | |
968 | esac | |
969 | if test "x$AUTOCONF" = xno; then | |
970 | aux_missing="$aux_missing autoconf" | |
971 | fi | |
9e8ac24b AM |
972 | else |
973 | AUTOCONF=no | |
14519931 | 974 | fi |
1400de2e | 975 | |
32a448ed RM |
976 | test -n "$critic_missing" && AC_MSG_ERROR([ |
977 | *** These critical programs are missing or too old:$critic_missing | |
978 | *** Check the INSTALL file for required versions.]) | |
979 | ||
4bca4c17 | 980 | test -n "$aux_missing" && AC_MSG_WARN([ |
9c6fffc0 | 981 | *** These auxiliary programs are missing or incompatible versions:$aux_missing |
63bda0c1 UD |
982 | *** some features will be disabled. |
983 | *** Check the INSTALL file for required versions.]) | |
28f540f4 | 984 | |
dbe7a0f5 UD |
985 | # if using special system headers, find out the compiler's sekrit |
986 | # header directory and add that to the list. NOTE: Only does the right | |
987 | # thing on a system that doesn't need fixincludes. (Not presently a problem.) | |
988 | if test -n "$sysheaders"; then | |
67fbfa5c RM |
989 | SYSINCLUDES=-nostdinc |
990 | for d in include include-fixed; do | |
991 | i=`$CC -print-file-name="$d"` && test "x$i" != x && test "x$i" != "x$d" && | |
992 | SYSINCLUDES="$SYSINCLUDES -isystem $i" | |
993 | done | |
994 | SYSINCLUDES="$SYSINCLUDES \ | |
3d6ce23a | 995 | -isystem `echo $sysheaders | sed 's/:/ -isystem /g'`" |
ef226fec | 996 | if test -n "$CXX"; then |
7872cfb0 | 997 | CXX_SYSINCLUDES= |
67060746 AC |
998 | for cxxheaders in `$CXX -v -S -x c++ /dev/null -o /dev/null 2>&1 \ |
999 | | sed -n -e '1,/#include/d' -e 's/^ \(\/.*\/[cg]++\)/\1/p'`; do | |
1000 | test "x$cxxheaders" != x && | |
1001 | CXX_SYSINCLUDES="$CXX_SYSINCLUDES -isystem $cxxheaders" | |
1002 | done | |
ef226fec | 1003 | fi |
dbe7a0f5 UD |
1004 | fi |
1005 | AC_SUBST(SYSINCLUDES) | |
ef226fec | 1006 | AC_SUBST(CXX_SYSINCLUDES) |
dbe7a0f5 | 1007 | |
3911660e UD |
1008 | # Test if LD_LIBRARY_PATH contains the notation for the current directory |
1009 | # since this would lead to problems installing/building glibc. | |
1010 | # LD_LIBRARY_PATH contains the current directory if one of the following | |
1011 | # is true: | |
1012 | # - one of the terminals (":" and ";") is the first or last sign | |
1013 | # - two terminals occur directly after each other | |
1014 | # - the path contains an element with a dot in it | |
1015 | AC_MSG_CHECKING(LD_LIBRARY_PATH variable) | |
1016 | changequote(,)dnl | |
1017 | case ${LD_LIBRARY_PATH} in | |
1018 | [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* ) | |
b3a86ae1 | 1019 | ld_library_path_setting="contains current directory" |
3911660e UD |
1020 | ;; |
1021 | *) | |
1022 | ld_library_path_setting="ok" | |
1023 | ;; | |
1024 | esac | |
1025 | changequote([,])dnl | |
1026 | AC_MSG_RESULT($ld_library_path_setting) | |
1027 | if test "$ld_library_path_setting" != "ok"; then | |
63bda0c1 UD |
1028 | AC_MSG_ERROR([ |
1029 | *** LD_LIBRARY_PATH shouldn't contain the current directory when | |
1030 | *** building glibc. Please change the environment variable | |
1031 | *** and run configure again.]) | |
3911660e | 1032 | fi |
8e31cf7e | 1033 | |
74bd2300 | 1034 | AC_CACHE_CHECK(whether GCC supports -static-libgcc, libc_cv_gcc_static_libgcc, [dnl |
8175a253 | 1035 | if $CC -v -static-libgcc 2>&1 | grep 'unrecognized option.*static-libgcc' >/dev/null; then |
74bd2300 UD |
1036 | libc_cv_gcc_static_libgcc= |
1037 | else | |
1038 | libc_cv_gcc_static_libgcc=-static-libgcc | |
1039 | fi]) | |
1040 | AC_SUBST(libc_cv_gcc_static_libgcc) | |
1041 | ||
26f56c1c | 1042 | AC_PATH_PROG(BASH_SHELL, bash, no) |
84384f5b | 1043 | |
c0016081 | 1044 | AC_PATH_PROG(PERL, perl, no) |
2fd5d029 RM |
1045 | if test "$PERL" != no && |
1046 | (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then | |
1047 | PERL=no | |
ecb06196 | 1048 | fi |
2f512715 AS |
1049 | AC_PATH_PROG(INSTALL_INFO, install-info, no, |
1050 | $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin) | |
2de00372 UD |
1051 | AC_PATH_PROG(BISON, bison, no, $PATH:/usr/local/bin:/usr/bin:/bin) |
1052 | ||
b8dc6a10 | 1053 | AC_CACHE_CHECK(for libc-friendly stddef.h, libc_cv_friendly_stddef, [dnl |
28f540f4 RM |
1054 | AC_TRY_COMPILE(dnl |
1055 | [#define __need_size_t | |
1056 | #define __need_wchar_t | |
1057 | #include <stddef.h> | |
1058 | #define __need_NULL | |
1059 | #include <stddef.h>], [size_t size; wchar_t wchar; | |
1060 | #ifdef offsetof | |
1061 | #error stddef.h ignored __need_* | |
1062 | #endif | |
1063 | if (&size == NULL || &wchar == NULL) abort ();], | |
77e8bddf AS |
1064 | libc_cv_friendly_stddef=yes, |
1065 | libc_cv_friendly_stddef=no)]) | |
28f540f4 RM |
1066 | if test $libc_cv_friendly_stddef = yes; then |
1067 | config_vars="$config_vars | |
1068 | override stddef.h = # The installed <stddef.h> seems to be libc-friendly." | |
1069 | fi | |
1070 | ||
b8dc6a10 RM |
1071 | AC_CACHE_CHECK(whether we need to use -P to assemble .S files, |
1072 | libc_cv_need_minus_P, [dnl | |
28f540f4 RM |
1073 | cat > conftest.S <<EOF |
1074 | #include "confdefs.h" | |
1075 | /* Nothing whatsoever. */ | |
1076 | EOF | |
3217788f | 1077 | if AC_TRY_COMMAND(${CC-cc} $CPPFLAGS $ASFLAGS -c conftest.S 1>&AS_MESSAGE_LOG_FD); then |
28f540f4 RM |
1078 | libc_cv_need_minus_P=no |
1079 | else | |
1080 | libc_cv_need_minus_P=yes | |
1081 | fi | |
1082 | rm -f conftest*]) | |
28f540f4 RM |
1083 | if test $libc_cv_need_minus_P = yes; then |
1084 | config_vars="$config_vars | |
1085 | asm-CPPFLAGS = -P # The assembler can't grok cpp's # line directives." | |
1086 | fi | |
1087 | ||
b8dc6a10 | 1088 | AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl |
9a70fcab | 1089 | cat > conftest.s <<EOF |
2293395f | 1090 | ${libc_cv_dot_text} |
ae1025be | 1091 | foo: |
df2a0c93 | 1092 | .set glibc_conftest_frobozz,foo |
7b8e0d49 | 1093 | .globl glibc_conftest_frobozz |
e215c478 | 1094 | EOF |
df2a0c93 RM |
1095 | # The alpha-dec-osf1 assembler gives only a warning for `.set' |
1096 | # (but it doesn't work), so we must do a linking check to be sure. | |
1097 | cat > conftest1.c <<\EOF | |
1098 | extern int glibc_conftest_frobozz; | |
640f0119 | 1099 | void _start() { glibc_conftest_frobozz = 1; } |
df2a0c93 RM |
1100 | EOF |
1101 | if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \ | |
640f0119 | 1102 | -nostartfiles -nostdlib \ |
0b4ee387 | 1103 | -o conftest conftest.s conftest1.c 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then |
e215c478 RM |
1104 | libc_cv_asm_set_directive=yes |
1105 | else | |
1106 | libc_cv_asm_set_directive=no | |
1107 | fi | |
65b3cbcb | 1108 | rm -f conftest*]) |
e215c478 RM |
1109 | if test $libc_cv_asm_set_directive = yes; then |
1110 | AC_DEFINE(HAVE_ASM_SET_DIRECTIVE) | |
1111 | fi | |
1112 | ||
415ac3df UD |
1113 | AC_CACHE_CHECK(for assembler gnu_unique_object symbol type, |
1114 | libc_cv_asm_unique_object, [dnl | |
1115 | cat > conftest.s <<EOF | |
1116 | ${libc_cv_dot_text} | |
1117 | _sym: | |
b67e9372 | 1118 | .type _sym, %gnu_unique_object |
415ac3df UD |
1119 | EOF |
1120 | if ${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then | |
1121 | libc_cv_asm_unique_object=yes | |
1122 | else | |
1123 | libc_cv_asm_unique_object=no | |
1124 | fi | |
1125 | rm -f conftest*]) | |
1126 | if test $libc_cv_asm_unique_object = yes; then | |
1127 | AC_DEFINE(HAVE_ASM_UNIQUE_OBJECT) | |
1128 | fi | |
1129 | ||
a0da5fe1 UD |
1130 | AC_CACHE_CHECK(for .previous assembler directive, |
1131 | libc_cv_asm_previous_directive, [dnl | |
1132 | cat > conftest.s <<EOF | |
fd26970f UD |
1133 | .section foo_section |
1134 | .previous | |
a0da5fe1 UD |
1135 | EOF |
1136 | if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then | |
1137 | libc_cv_asm_previous_directive=yes | |
1138 | else | |
1139 | libc_cv_asm_previous_directive=no | |
1140 | fi | |
1141 | rm -f conftest*]) | |
1142 | if test $libc_cv_asm_previous_directive = yes; then | |
1143 | AC_DEFINE(HAVE_ASM_PREVIOUS_DIRECTIVE) | |
1144 | else | |
1145 | AC_CACHE_CHECK(for .popsection assembler directive, | |
1146 | libc_cv_asm_popsection_directive, [dnl | |
1147 | cat > conftest.s <<EOF | |
1148 | .pushsection foo_section | |
1149 | .popsection | |
fd26970f | 1150 | EOF |
3217788f | 1151 | if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then |
a0da5fe1 | 1152 | libc_cv_asm_popsection_directive=yes |
fd26970f | 1153 | else |
a0da5fe1 | 1154 | libc_cv_asm_popsection_directive=no |
fd26970f UD |
1155 | fi |
1156 | rm -f conftest*]) | |
a0da5fe1 UD |
1157 | if test $libc_cv_asm_popsection_directive = yes; then |
1158 | AC_DEFINE(HAVE_ASM_POPSECTION_DIRECTIVE) | |
fd26970f | 1159 | fi |
a0da5fe1 UD |
1160 | fi |
1161 | AC_CACHE_CHECK(for .protected and .hidden assembler directive, | |
1162 | libc_cv_asm_protected_directive, [dnl | |
1163 | cat > conftest.s <<EOF | |
2d499f55 UD |
1164 | .protected foo |
1165 | foo: | |
1166 | .hidden bar | |
1167 | bar: | |
1168 | EOF | |
a0da5fe1 UD |
1169 | if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then |
1170 | libc_cv_asm_protected_directive=yes | |
1171 | else | |
1172 | AC_MSG_ERROR(assembler support for symbol visibility is required) | |
1173 | fi | |
1174 | rm -f conftest*]) | |
0fb7851f | 1175 | |
a0da5fe1 UD |
1176 | if test $libc_cv_asm_protected_directive = yes; then |
1177 | AC_CACHE_CHECK(whether __attribute__((visibility())) is supported, | |
0d01dace UD |
1178 | libc_cv_visibility_attribute, |
1179 | [cat > conftest.c <<EOF | |
1180 | int foo __attribute__ ((visibility ("hidden"))) = 1; | |
1181 | int bar __attribute__ ((visibility ("protected"))) = 1; | |
1182 | EOF | |
1183 | libc_cv_visibility_attribute=no | |
61cea1c3 | 1184 | if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then |
0d01dace UD |
1185 | if grep '\.hidden.*foo' conftest.s >/dev/null; then |
1186 | if grep '\.protected.*bar' conftest.s >/dev/null; then | |
1187 | libc_cv_visibility_attribute=yes | |
1188 | fi | |
1189 | fi | |
1190 | fi | |
f7d82dc9 | 1191 | rm -f conftest.{c,s} |
0d01dace | 1192 | ]) |
a0da5fe1 UD |
1193 | if test $libc_cv_visibility_attribute != yes; then |
1194 | AC_MSG_ERROR(compiler support for visibility attribute is required) | |
0d01dace | 1195 | fi |
a0da5fe1 | 1196 | fi |
0d01dace | 1197 | |
a0da5fe1 UD |
1198 | if test $libc_cv_visibility_attribute = yes; then |
1199 | AC_CACHE_CHECK(for broken __attribute__((visibility())), | |
37ba7d66 UD |
1200 | libc_cv_broken_visibility_attribute, |
1201 | [cat > conftest.c <<EOF | |
1202 | int foo (int x); | |
1203 | int bar (int x) __asm__ ("foo") __attribute__ ((visibility ("hidden"))); | |
1204 | int bar (int x) { return x; } | |
1205 | EOF | |
1206 | libc_cv_broken_visibility_attribute=yes | |
f7d82dc9 | 1207 | if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then |
37ba7d66 UD |
1208 | changequote(,)dnl |
1209 | if grep '\.hidden[ _]foo' conftest.s >/dev/null; then | |
1210 | changequote([,])dnl | |
1211 | libc_cv_broken_visibility_attribute=no | |
1212 | fi | |
1213 | fi | |
1214 | rm -f conftest.c conftest.s | |
1215 | ]) | |
a0da5fe1 UD |
1216 | if test $libc_cv_broken_visibility_attribute = yes; then |
1217 | AC_MSG_ERROR(working compiler support for visibility attribute is required) | |
37ba7d66 | 1218 | fi |
a0da5fe1 | 1219 | fi |
37ba7d66 | 1220 | |
a0da5fe1 UD |
1221 | AC_CACHE_CHECK(for broken __attribute__((alias())), |
1222 | libc_cv_broken_alias_attribute, | |
1223 | [cat > conftest.c <<EOF | |
1224 | extern int foo (int x) __asm ("xyzzy"); | |
1225 | int bar (int x) { return x; } | |
1226 | extern __typeof (bar) foo __attribute ((weak, alias ("bar"))); | |
1227 | extern int dfoo; | |
1228 | extern __typeof (dfoo) dfoo __asm ("abccb"); | |
1229 | int dfoo = 1; | |
37ba7d66 | 1230 | EOF |
a0da5fe1 UD |
1231 | libc_cv_broken_alias_attribute=yes |
1232 | if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then | |
1233 | if grep 'xyzzy' conftest.s >/dev/null && | |
1234 | grep 'abccb' conftest.s >/dev/null; then | |
1235 | libc_cv_broken_alias_attribute=no | |
1236 | fi | |
1237 | fi | |
1238 | rm -f conftest.c conftest.s | |
1239 | ]) | |
1240 | if test $libc_cv_broken_alias_attribute = yes; then | |
1241 | AC_MSG_ERROR(working alias attribute support required) | |
1242 | fi | |
1243 | ||
1244 | if test $libc_cv_visibility_attribute = yes; then | |
1245 | AC_CACHE_CHECK(whether to put _rtld_local into .sdata section, | |
0d01dace UD |
1246 | libc_cv_have_sdata_section, |
1247 | [echo "int i;" > conftest.c | |
1248 | libc_cv_have_sdata_section=no | |
dbc92dc6 | 1249 | if ${CC-cc} $LDFLAGS -fPIC -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \ |
0d01dace UD |
1250 | | grep '\.sdata' >/dev/null; then |
1251 | libc_cv_have_sdata_section=yes | |
1252 | fi | |
1253 | rm -f conftest.c conftest.so | |
1254 | ]) | |
a0da5fe1 UD |
1255 | if test $libc_cv_have_sdata_section = yes; then |
1256 | AC_DEFINE(HAVE_SDATA_SECTION) | |
0d01dace | 1257 | fi |
a0da5fe1 | 1258 | fi |
0d01dace | 1259 | |
a0da5fe1 UD |
1260 | AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support, |
1261 | libc_cv_initfini_array, [dnl | |
07037eeb | 1262 | LIBC_TRY_LINK_STATIC([ |
5241882c | 1263 | int foo (void) { return 1; } |
2c617417 | 1264 | int (*fp) (void) __attribute__ ((section (".init_array"))) = foo; |
07037eeb JM |
1265 | ], |
1266 | [if $READELF -S conftest | fgrep INIT_ARRAY > /dev/null; then | |
a0da5fe1 | 1267 | libc_cv_initfini_array=yes |
5241882c | 1268 | else |
ce33ee7c | 1269 | libc_cv_initfini_array=no |
07037eeb JM |
1270 | fi], |
1271 | [libc_cv_initfini_array=no]) | |
1272 | ]) | |
a0da5fe1 UD |
1273 | if test $libc_cv_initfini_array != yes; then |
1274 | AC_MSG_ERROR([Need linker with .init_array/.fini_array support.]) | |
1275 | fi | |
62bede13 | 1276 | |
a0da5fe1 UD |
1277 | AC_CACHE_CHECK(whether to use .ctors/.dtors header and trailer, |
1278 | libc_cv_ctors_header, [dnl | |
1279 | libc_cv_ctors_header=yes | |
07037eeb JM |
1280 | LIBC_TRY_LINK_STATIC([ |
1281 | __attribute__ ((constructor)) void ctor (void) { asm (""); } | |
1282 | __attribute__ ((destructor)) void dtor (void) { asm (""); } | |
113ddea4 | 1283 | ], |
a0da5fe1 | 1284 | [dnl |
113ddea4 | 1285 | AS_IF([$READELF -WS conftest$ac_exeext | $AWK ' |
92963737 | 1286 | { gsub(/\@<:@ */, "@<:@") } |
113ddea4 RM |
1287 | $2 == ".ctors" || $2 == ".dtors" { |
1288 | size = strtonum("0x" $6) | |
1289 | align = strtonum("0x" $NF) | |
1290 | seen@<:@$2@:>@ = 1 | |
1291 | stub@<:@$2@:>@ = size == align * 2 | |
92963737 | 1292 | } |
113ddea4 RM |
1293 | END { |
1294 | ctors_ok = !seen@<:@".ctors"@:>@ || stub@<:@".ctors"@:>@ | |
1295 | dtors_ok = !seen@<:@".dtors"@:>@ || stub@<:@".dtors"@:>@ | |
1296 | exit ((ctors_ok && dtors_ok) ? 0 : 1) | |
1297 | } | |
1298 | '], [libc_cv_ctors_header=no]) | |
1299 | ], [dnl | |
1300 | AC_MSG_ERROR([missing __attribute__ ((constructor)) support??]) | |
1301 | ]) | |
a0da5fe1 UD |
1302 | ]) |
1303 | if test $libc_cv_ctors_header = no; then | |
1304 | AC_DEFINE(NO_CTORS_DTORS_SECTIONS) | |
1305 | fi | |
5241882c | 1306 | |
a0da5fe1 UD |
1307 | AC_CACHE_CHECK(for libunwind-support in compiler, |
1308 | libc_cv_cc_with_libunwind, [ | |
1309 | cat > conftest.c <<EOF | |
cbdb12de UD |
1310 | int main (void) { return 0; } |
1311 | EOF | |
a0da5fe1 | 1312 | if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -static -o conftest \ |
8175a253 | 1313 | conftest.c -v 2>&1 >/dev/null | grep ' -lunwind ' >/dev/null; then |
a0da5fe1 UD |
1314 | libc_cv_cc_with_libunwind=yes |
1315 | else | |
1316 | libc_cv_cc_with_libunwind=no | |
c776b3d7 | 1317 | fi |
a0da5fe1 UD |
1318 | rm -f conftest*]) |
1319 | AC_SUBST(libc_cv_cc_with_libunwind) | |
1320 | if test $libc_cv_cc_with_libunwind = yes; then | |
1321 | AC_DEFINE(HAVE_CC_WITH_LIBUNWIND) | |
1322 | fi | |
c776b3d7 | 1323 | |
6bfea974 L |
1324 | LIBC_LINKER_FEATURE([-z nodelete], [-Wl,--enable-new-dtags,-z,nodelete], |
1325 | [libc_cv_z_nodelete=yes], | |
1326 | [AC_MSG_ERROR(linker with -z nodelete support required)]) | |
2f54c82d | 1327 | |
6bfea974 L |
1328 | LIBC_LINKER_FEATURE([-z nodlopen], [-Wl,--enable-new-dtags,-z,nodlopen], |
1329 | [libc_cv_z_nodlopen=yes], | |
1330 | [AC_MSG_ERROR(linker with -z nodlopen support required)]) | |
5d916713 | 1331 | |
6bfea974 L |
1332 | LIBC_LINKER_FEATURE([-z initfirst], [-Wl,--enable-new-dtags,-z,initfirst], |
1333 | [libc_cv_z_initfirst=yes], | |
1334 | [AC_MSG_ERROR(linker with -z initfirst support required)]) | |
639c3248 | 1335 | |
a0da5fe1 UD |
1336 | AC_CACHE_CHECK(for -Bgroup option, |
1337 | libc_cv_Bgroup, [dnl | |
1338 | cat > conftest.c <<EOF | |
639c3248 UD |
1339 | int _start (void) { return 42; } |
1340 | EOF | |
a0da5fe1 UD |
1341 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS |
1342 | -fPIC -shared -o conftest.so conftest.c | |
1343 | -Wl,-Bgroup -nostdlib 1>&AS_MESSAGE_LOG_FD]) | |
1344 | then | |
1345 | libc_cv_Bgroup=yes | |
1346 | else | |
1347 | libc_cv_Bgroup=no | |
1348 | fi | |
1349 | rm -f conftest*]) | |
1350 | AC_SUBST(libc_cv_Bgroup) | |
a711b01d | 1351 | |
a0da5fe1 UD |
1352 | ASFLAGS_config= |
1353 | AC_CACHE_CHECK(whether --noexecstack is desirable for .S files, | |
1354 | libc_cv_as_noexecstack, [dnl | |
1355 | cat > conftest.c <<EOF | |
35915ec8 UD |
1356 | void foo (void) { } |
1357 | EOF | |
a0da5fe1 UD |
1358 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS |
1359 | -S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \ | |
8175a253 | 1360 | && grep .note.GNU-stack conftest.s >/dev/null \ |
a0da5fe1 UD |
1361 | && AC_TRY_COMMAND([${CC-cc} $ASFLAGS -Wa,--noexecstack |
1362 | -c -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD]) | |
1363 | then | |
1364 | libc_cv_as_noexecstack=yes | |
1365 | else | |
1366 | libc_cv_as_noexecstack=no | |
1367 | fi | |
1368 | rm -f conftest*]) | |
1369 | if test $libc_cv_as_noexecstack = yes; then | |
1370 | ASFLAGS_config="$ASFLAGS_config -Wa,--noexecstack" | |
1371 | fi | |
1372 | AC_SUBST(ASFLAGS_config) | |
2abf9ff1 | 1373 | |
a0da5fe1 UD |
1374 | AC_CACHE_CHECK(for -z combreloc, |
1375 | libc_cv_z_combreloc, [dnl | |
1376 | cat > conftest.c <<EOF | |
d555194c UD |
1377 | extern int bar (int); |
1378 | extern int mumble; | |
1379 | int foo (void) { return bar (mumble); } | |
a711b01d | 1380 | EOF |
a0da5fe1 | 1381 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS |
dbc92dc6 | 1382 | -fPIC -shared -o conftest.so conftest.c |
35cd3c97 | 1383 | -nostdlib -nostartfiles |
c2f55635 | 1384 | -Wl,-z,combreloc 1>&AS_MESSAGE_LOG_FD]) |
a0da5fe1 | 1385 | then |
a711b01d UD |
1386 | dnl The following test is a bit weak. We must use a tool which can test |
1387 | dnl cross-platform since the gcc used can be a cross compiler. Without | |
1388 | dnl introducing new options this is not easily doable. Instead use a tool | |
1389 | dnl which always is cross-platform: readelf. To detect whether -z combreloc | |
1390 | dnl look for a section named .rel.dyn. | |
a0da5fe1 UD |
1391 | if $READELF -S conftest.so | grep '\.rel\(a\|\)\.dyn' > /dev/null; then |
1392 | libc_cv_z_combreloc=yes | |
fdde8349 UD |
1393 | else |
1394 | libc_cv_z_combreloc=no | |
a711b01d | 1395 | fi |
a0da5fe1 UD |
1396 | else |
1397 | libc_cv_z_combreloc=no | |
1398 | fi | |
1399 | rm -f conftest*]) | |
1400 | if test "$libc_cv_z_combreloc" = yes; then | |
1401 | AC_DEFINE(HAVE_Z_COMBRELOC) | |
1402 | fi | |
1403 | AC_SUBST(libc_cv_z_combreloc) | |
2abf9ff1 | 1404 | |
6bfea974 L |
1405 | LIBC_LINKER_FEATURE([-z execstack], [-Wl,-z,execstack], |
1406 | [libc_cv_z_execstack=yes], [libc_cv_z_execstack=no]) | |
a0da5fe1 | 1407 | AC_SUBST(libc_cv_z_execstack) |
c9c60884 | 1408 | |
a0da5fe1 | 1409 | AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl |
4da0431d JM |
1410 | LIBC_TRY_CC_OPTION([-fpie], [libc_cv_fpie=yes], [libc_cv_fpie=no]) |
1411 | ]) | |
c9c60884 | 1412 | |
a0da5fe1 | 1413 | AC_SUBST(libc_cv_fpie) |
871b9158 | 1414 | |
a0da5fe1 UD |
1415 | AC_CACHE_CHECK(for --hash-style option, |
1416 | libc_cv_hashstyle, [dnl | |
1417 | cat > conftest.c <<EOF | |
871b9158 UD |
1418 | int _start (void) { return 42; } |
1419 | EOF | |
a0da5fe1 UD |
1420 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS |
1421 | -fPIC -shared -o conftest.so conftest.c | |
1422 | -Wl,--hash-style=both -nostdlib 1>&AS_MESSAGE_LOG_FD]) | |
1423 | then | |
1424 | libc_cv_hashstyle=yes | |
1425 | else | |
1426 | libc_cv_hashstyle=no | |
1427 | fi | |
1428 | rm -f conftest*]) | |
1429 | AC_SUBST(libc_cv_hashstyle) | |
1430 | ||
1431 | # The linker's default -shared behavior is good enough if it | |
1432 | # does these things that our custom linker scripts ensure that | |
1433 | # all allocated NOTE sections come first. | |
1434 | if test "$use_default_link" = default; then | |
1435 | AC_CACHE_CHECK([for sufficient default -shared layout], | |
1436 | libc_cv_use_default_link, [dnl | |
1437 | libc_cv_use_default_link=no | |
1438 | cat > conftest.s <<\EOF | |
fd5e21c7 RM |
1439 | .section .note.a,"a",%note |
1440 | .balign 4 | |
1441 | .long 4,4,9 | |
1442 | .string "GNU" | |
1443 | .string "foo" | |
1444 | .section .note.b,"a",%note | |
1445 | .balign 4 | |
1446 | .long 4,4,9 | |
1447 | .string "GNU" | |
1448 | .string "bar" | |
1449 | EOF | |
a0da5fe1 | 1450 | if AC_TRY_COMMAND([dnl |
fd5e21c7 RM |
1451 | ${CC-cc} $ASFLAGS -shared -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD]) && |
1452 | ac_try=`$READELF -S conftest.so | sed -n \ | |
1453 | ['${x;p;} | |
1454 | s/^ *\[ *[1-9][0-9]*\] *\([^ ][^ ]*\) *\([^ ][^ ]*\) .*$/\2 \1/ | |
1455 | t a | |
1456 | b | |
1457 | : a | |
1458 | H']` | |
a0da5fe1 UD |
1459 | then |
1460 | libc_seen_a=no libc_seen_b=no | |
1461 | set -- $ac_try | |
1462 | while test $# -ge 2 -a "$1" = NOTE; do | |
1463 | case "$2" in | |
1464 | .note.a) libc_seen_a=yes ;; | |
1465 | .note.b) libc_seen_b=yes ;; | |
1466 | esac | |
1467 | shift 2 | |
1468 | done | |
1469 | case "$libc_seen_a$libc_seen_b" in | |
1470 | yesyes) | |
1471 | libc_cv_use_default_link=yes | |
1472 | ;; | |
1473 | *) | |
1474 | echo >&AS_MESSAGE_LOG_FD "\ | |
fd5e21c7 RM |
1475 | $libc_seen_a$libc_seen_b from: |
1476 | $ac_try" | |
a0da5fe1 UD |
1477 | ;; |
1478 | esac | |
fd5e21c7 | 1479 | fi |
a0da5fe1 UD |
1480 | rm -f conftest*]) |
1481 | use_default_link=$libc_cv_use_default_link | |
fd26970f | 1482 | fi |
49803108 | 1483 | |
5c550700 RM |
1484 | AC_CACHE_CHECK(linker output format, libc_cv_output_format, [dnl |
1485 | if libc_cv_output_format=` | |
1486 | ${CC-cc} -nostartfiles -nostdlib -Wl,--print-output-format 2>&AS_MESSAGE_LOG_FD` | |
1487 | then | |
1488 | : | |
1489 | else | |
1490 | libc_cv_output_format= | |
1491 | fi | |
1492 | test -n "$libc_cv_output_format" || libc_cv_output_format=unknown]) | |
1493 | AC_SUBST(libc_cv_output_format) | |
1494 | ||
22dca1ea | 1495 | AC_CACHE_CHECK(for -fno-toplevel-reorder -fno-section-anchors, libc_cv_fno_toplevel_reorder, [dnl |
49803108 AJ |
1496 | cat > conftest.c <<EOF |
1497 | int foo; | |
1498 | EOF | |
22dca1ea | 1499 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fno-toplevel-reorder -fno-section-anchors |
49803108 AJ |
1500 | conftest.c 1>&AS_MESSAGE_LOG_FD]) |
1501 | then | |
18e2ac6d | 1502 | libc_cv_fno_toplevel_reorder=yes |
49803108 | 1503 | else |
18e2ac6d | 1504 | libc_cv_fno_toplevel_reorder=no |
49803108 AJ |
1505 | fi |
1506 | rm -f conftest*]) | |
18e2ac6d | 1507 | if test $libc_cv_fno_toplevel_reorder = yes; then |
22dca1ea | 1508 | fno_unit_at_a_time="-fno-toplevel-reorder -fno-section-anchors" |
18e2ac6d | 1509 | else |
49803108 AJ |
1510 | fno_unit_at_a_time=-fno-unit-at-a-time |
1511 | fi | |
1512 | AC_SUBST(fno_unit_at_a_time) | |
fd26970f | 1513 | |
401a9ec9 | 1514 | AC_CACHE_CHECK(for -fstack-protector, libc_cv_ssp, [dnl |
17228132 TS |
1515 | LIBC_TRY_CC_OPTION([$CFLAGS $CPPFLAGS -Werror -fstack-protector], |
1516 | [libc_cv_ssp=yes], | |
1517 | [libc_cv_ssp=no]) | |
1518 | ]) | |
401a9ec9 UD |
1519 | AC_SUBST(libc_cv_ssp) |
1520 | ||
b037a293 UD |
1521 | AC_CACHE_CHECK(for -fgnu89-inline, libc_cv_gnu89_inline, [dnl |
1522 | cat > conftest.c <<EOF | |
1523 | int foo; | |
1524 | #ifdef __GNUC_GNU_INLINE__ | |
1525 | main () { return 0;} | |
1526 | #else | |
1527 | #error | |
1528 | #endif | |
1529 | EOF | |
371f84a4 JJ |
1530 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -std=gnu99 -fgnu89-inline |
1531 | -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) | |
b037a293 UD |
1532 | then |
1533 | libc_cv_gnu89_inline=yes | |
1534 | else | |
1535 | libc_cv_gnu89_inline=no | |
1536 | fi | |
1537 | rm -f conftest*]) | |
1538 | if test $libc_cv_gnu89_inline = yes; then | |
1c7570ff | 1539 | gnu89_inline=-fgnu89-inline |
b037a293 | 1540 | else |
1c7570ff | 1541 | gnu89_inline= |
b037a293 | 1542 | fi |
1c7570ff | 1543 | AC_SUBST(gnu89_inline) |
b037a293 | 1544 | |
a0da5fe1 UD |
1545 | AC_CACHE_CHECK(whether cc puts quotes around section names, |
1546 | libc_cv_have_section_quotes, | |
1547 | [cat > conftest.c <<EOF | |
1548 | static const int foo | |
1549 | __attribute__ ((section ("bar"))) = 1; | |
e26dd47f | 1550 | EOF |
a0da5fe1 UD |
1551 | if ${CC-cc} -S conftest.c -o conftest.s; then |
1552 | if grep '\.section.*"bar"' conftest.s >/dev/null; then | |
1553 | libc_cv_have_section_quotes=yes | |
e26dd47f | 1554 | else |
a0da5fe1 | 1555 | libc_cv_have_section_quotes=no |
e26dd47f | 1556 | fi |
a0da5fe1 UD |
1557 | else |
1558 | libc_cv_have_section_quotes=unknown | |
1559 | fi | |
1560 | rm -f conftest.{c,s} | |
1561 | ]) | |
1562 | if test $libc_cv_have_section_quotes = yes; then | |
1563 | AC_DEFINE(HAVE_SECTION_QUOTES) | |
9a97d1f7 UD |
1564 | fi |
1565 | ||
1566 | AC_CACHE_CHECK(for assembler .weak directive, libc_cv_asm_weak_directive, | |
75d86c1f | 1567 | [dnl |
c224a18a | 1568 | cat > conftest.s <<EOF |
2293395f | 1569 | ${libc_cv_dot_text} |
7b8e0d49 | 1570 | .globl foo |
ae1025be | 1571 | foo: |
c224a18a RM |
1572 | .weak foo |
1573 | .weak bar; bar = foo | |
1574 | EOF | |
3217788f | 1575 | if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then |
9a97d1f7 UD |
1576 | libc_cv_asm_weak_directive=yes |
1577 | else | |
1578 | libc_cv_asm_weak_directive=no | |
1579 | fi | |
1580 | rm -f conftest*]) | |
c224a18a | 1581 | |
c8cf0b14 | 1582 | if test $libc_cv_asm_weak_directive = no; then |
c224a18a RM |
1583 | AC_CACHE_CHECK(for assembler .weakext directive, |
1584 | libc_cv_asm_weakext_directive, | |
1585 | [dnl | |
1586 | cat > conftest.s <<EOF | |
2293395f | 1587 | ${libc_cv_dot_text} |
7b8e0d49 | 1588 | .globl foo |
ae1025be | 1589 | foo: |
f802accb UD |
1590 | .weakext bar foo |
1591 | .weakext baz | |
7b8e0d49 | 1592 | .globl baz |
9a97d1f7 | 1593 | baz: |
c224a18a | 1594 | EOF |
3217788f | 1595 | if AC_TRY_COMMAND(${CC-cc} $ASFLAGS -c conftest.s 1>&AS_MESSAGE_LOG_FD); then |
c224a18a RM |
1596 | libc_cv_asm_weakext_directive=yes |
1597 | else | |
1598 | libc_cv_asm_weakext_directive=no | |
1599 | fi | |
1600 | rm -f conftest*]) | |
1601 | ||
9a97d1f7 | 1602 | fi # no .weak |
c224a18a | 1603 | |
ffcf9634 | 1604 | if test $libc_cv_asm_weak_directive = yes; then |
c224a18a | 1605 | AC_DEFINE(HAVE_ASM_WEAK_DIRECTIVE) |
ffcf9634 | 1606 | elif test $libc_cv_asm_weakext_directive = yes; then |
c224a18a RM |
1607 | AC_DEFINE(HAVE_ASM_WEAKEXT_DIRECTIVE) |
1608 | fi | |
1609 | ||
a641835a RM |
1610 | AC_CACHE_CHECK(for ld --no-whole-archive, libc_cv_ld_no_whole_archive, [dnl |
1611 | cat > conftest.c <<\EOF | |
5f0e6fc7 | 1612 | _start () {} |
dcf0671d UD |
1613 | int __eh_pc; |
1614 | __throw () {} | |
a641835a | 1615 | EOF |
dcea62dd | 1616 | dnl No \ in command here because it ends up inside ''. |
3217788f | 1617 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS |
dcea62dd | 1618 | -nostdlib -nostartfiles -Wl,--no-whole-archive |
c2f55635 | 1619 | -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then |
a641835a RM |
1620 | libc_cv_ld_no_whole_archive=yes |
1621 | else | |
1622 | libc_cv_ld_no_whole_archive=no | |
1623 | fi | |
1624 | rm -f conftest*]) | |
3ce1f295 UD |
1625 | if test $libc_cv_ld_no_whole_archive = no; then |
1626 | AC_MSG_ERROR([support for --no-whole-archive is needed]) | |
b17277cf | 1627 | fi |
a641835a | 1628 | |
dff14448 | 1629 | AC_CACHE_CHECK(for gcc -fexceptions, libc_cv_gcc_exceptions, [dnl |
b236e99d UD |
1630 | cat > conftest.c <<\EOF |
1631 | _start () {} | |
1632 | int __eh_pc; | |
1633 | __throw () {} | |
1634 | EOF | |
1635 | dnl No \ in command here because it ends up inside ''. | |
3217788f | 1636 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS |
dff14448 | 1637 | -nostdlib -nostartfiles -fexceptions |
c2f55635 | 1638 | -o conftest conftest.c 1>&AS_MESSAGE_LOG_FD]); then |
dff14448 | 1639 | libc_cv_gcc_exceptions=yes |
b236e99d | 1640 | else |
dff14448 | 1641 | libc_cv_gcc_exceptions=no |
b236e99d UD |
1642 | fi |
1643 | rm -f conftest*]) | |
dff14448 UD |
1644 | if test $libc_cv_gcc_exceptions = yes; then |
1645 | exceptions=-fexceptions | |
b17277cf | 1646 | fi |
dff14448 | 1647 | AC_SUBST(exceptions)dnl |
b236e99d | 1648 | |
d555194c UD |
1649 | AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl |
1650 | cat > conftest.c <<\EOF | |
1651 | void zero (void *x) | |
1652 | { | |
a52d1562 | 1653 | __builtin_memset (x, 0, 1000); |
d555194c UD |
1654 | } |
1655 | EOF | |
1656 | dnl | |
1657 | if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "memset" > /dev/null]); | |
1658 | then | |
1659 | libc_cv_gcc_builtin_memset=no | |
1660 | else | |
1661 | libc_cv_gcc_builtin_memset=yes | |
1662 | fi | |
1663 | rm -f conftest* ]) | |
1664 | if test "$libc_cv_gcc_builtin_memset" = yes ; then | |
1665 | AC_DEFINE(HAVE_BUILTIN_MEMSET) | |
1666 | fi | |
1667 | ||
85dd1003 UD |
1668 | AC_CACHE_CHECK(for redirection of built-in functions, libc_cv_gcc_builtin_redirection, [dnl |
1669 | cat > conftest.c <<\EOF | |
1670 | extern char *strstr (const char *, const char *) __asm ("my_strstr"); | |
1671 | char *foo (const char *a, const char *b) | |
1672 | { | |
1673 | return __builtin_strstr (a, b); | |
1674 | } | |
1675 | EOF | |
1676 | dnl | |
1677 | if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | fgrep "my_strstr" > /dev/null]); | |
1678 | then | |
1679 | libc_cv_gcc_builtin_redirection=yes | |
1680 | else | |
1681 | libc_cv_gcc_builtin_redirection=no | |
1682 | fi | |
1683 | rm -f conftest* ]) | |
3ce1f295 UD |
1684 | if test "$libc_cv_gcc_builtin_redirection" = no; then |
1685 | AC_MSG_ERROR([support for the symbol redirection needed]) | |
85dd1003 UD |
1686 | fi |
1687 | ||
739d440d | 1688 | dnl Check whether the compiler supports the __thread keyword. |
3ce1f295 UD |
1689 | AC_CACHE_CHECK([for __thread], libc_cv_gcc___thread, |
1690 | [cat > conftest.c <<\EOF | |
fbb18522 RM |
1691 | __thread int a = 42; |
1692 | EOF | |
3ce1f295 UD |
1693 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then |
1694 | libc_cv_gcc___thread=yes | |
739d440d UD |
1695 | else |
1696 | libc_cv_gcc___thread=no | |
1697 | fi | |
3ce1f295 UD |
1698 | rm -f conftest*]) |
1699 | if test "$libc_cv_gcc___thread" = no; then | |
1700 | AC_MSG_ERROR([support for the __thread keyword is required]) | |
1701 | fi | |
739d440d | 1702 | |
3ce1f295 UD |
1703 | dnl Check whether the compiler supports the tls_model attribute. |
1704 | AC_CACHE_CHECK([for tls_model attribute], libc_cv_gcc_tls_model_attr, [dnl | |
1705 | cat > conftest.c <<\EOF | |
9b21e6bc RM |
1706 | extern __thread int a __attribute__((tls_model ("initial-exec"))); |
1707 | EOF | |
3ce1f295 UD |
1708 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -Werror conftest.c >&AS_MESSAGE_LOG_FD]); then |
1709 | libc_cv_gcc_tls_model_attr=yes | |
1710 | else | |
1711 | libc_cv_gcc_tls_model_attr=no | |
1712 | fi | |
1713 | rm -f conftest*]) | |
1714 | if test "$libc_cv_gcc_tls_model_attr" = no; then | |
1715 | AC_MSG_ERROR([support for the tls_model attribute is required]) | |
9b21e6bc | 1716 | fi |
739d440d | 1717 | |
7998fa78 AS |
1718 | dnl Determine how to disable generation of FMA instructions. |
1719 | AC_CACHE_CHECK([for compiler option to disable generation of FMA instructions], | |
1720 | libc_cv_cc_nofma, [dnl | |
1721 | libc_cv_cc_nofma= | |
1722 | for opt in -ffp-contract=off -mno-fused-madd; do | |
1723 | LIBC_TRY_CC_OPTION([$opt], [libc_cv_cc_nofma=$opt; break]) | |
1724 | done]) | |
bef0b507 | 1725 | AC_SUBST(libc_cv_cc_nofma) |
7998fa78 | 1726 | |
2cf9ad57 RM |
1727 | if test -n "$submachine"; then |
1728 | AC_CACHE_CHECK([for compiler option for CPU variant], | |
f7d82dc9 | 1729 | libc_cv_cc_submachine, [dnl |
2cf9ad57 RM |
1730 | libc_cv_cc_submachine=no |
1731 | for opt in "-march=$submachine" "-mcpu=$submachine"; do | |
40b601fb | 1732 | LIBC_TRY_CC_OPTION([$opt], [ |
2cf9ad57 | 1733 | libc_cv_cc_submachine="$opt" |
40b601fb | 1734 | break], []) |
2cf9ad57 RM |
1735 | done]) |
1736 | if test "x$libc_cv_cc_submachine" = xno; then | |
1737 | AC_MSG_ERROR([${CC-cc} does not support $submachine]) | |
1738 | fi | |
1739 | fi | |
1740 | AC_SUBST(libc_cv_cc_submachine) | |
1741 | ||
85c2e611 AZ |
1742 | AC_CACHE_CHECK(if $CC accepts -fno-tree-loop-distribute-patterns with \ |
1743 | __attribute__ ((__optimize__)), libc_cv_cc_loop_to_function, [dnl | |
1744 | cat > conftest.c <<EOF | |
1745 | void | |
1746 | __attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns"))) | |
1747 | foo (void) {} | |
1748 | EOF | |
1749 | libc_cv_cc_loop_to_function=no | |
1750 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c]) | |
1751 | then | |
1752 | libc_cv_cc_loop_to_function=yes | |
1753 | fi | |
1754 | rm -f conftest*]) | |
1755 | if test $libc_cv_cc_loop_to_function = yes; then | |
1756 | AC_DEFINE(HAVE_CC_INHIBIT_LOOP_TO_LIBCALL) | |
1757 | fi | |
1758 | AC_SUBST(libc_cv_cc_loop_to_function) | |
1759 | ||
c8f3e6db UD |
1760 | dnl Check whether we have the gd library available. |
1761 | AC_MSG_CHECKING(for libgd) | |
6dab8688 UD |
1762 | if test "$with_gd" != "no"; then |
1763 | old_CFLAGS="$CFLAGS" | |
1764 | CFLAGS="$CFLAGS $libgd_include" | |
1765 | old_LDFLAGS="$LDFLAGS" | |
1766 | LDFLAGS="$LDFLAGS $libgd_ldflags" | |
1767 | old_LIBS="$LIBS" | |
1768 | LIBS="$LIBS -lgd -lpng -lz -lm" | |
1769 | AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no) | |
1770 | CFLAGS="$old_CFLAGS" | |
1771 | LDFLAGS="$old_LDFLAGS" | |
1772 | LIBS="$old_LIBS" | |
1773 | else | |
1774 | LIBGD=no | |
1775 | fi | |
c8f3e6db UD |
1776 | AC_MSG_RESULT($LIBGD) |
1777 | AC_SUBST(LIBGD) | |
3d558f4e | 1778 | |
2fff3d93 UD |
1779 | # SELinux detection |
1780 | if test x$with_selinux = xno ; then | |
1781 | have_selinux=no; | |
1782 | else | |
1783 | # See if we have the SELinux library | |
1784 | AC_CHECK_LIB(selinux, is_selinux_enabled, | |
1785 | have_selinux=yes, have_selinux=no) | |
49155d51 | 1786 | if test x$with_selinux = xyes ; then |
2fff3d93 | 1787 | if test x$have_selinux = xno ; then |
0699f766 | 1788 | AC_MSG_ERROR([SELinux explicitly required, but SELinux library not found]) |
2fff3d93 UD |
1789 | fi |
1790 | fi | |
1791 | fi | |
1792 | # Check if we're building with SELinux support. | |
1793 | if test "x$have_selinux" = xyes; then | |
943db9eb | 1794 | AC_DEFINE(HAVE_SELINUX, 1, [SELinux support]) |
ec23b9be UD |
1795 | |
1796 | # See if we have the libaudit library | |
943db9eb | 1797 | AC_CHECK_LIB(audit, audit_log_user_avc_message, |
77e8bddf | 1798 | have_libaudit=yes, have_libaudit=no) |
ec23b9be | 1799 | if test "x$have_libaudit" = xyes; then |
943db9eb | 1800 | AC_DEFINE(HAVE_LIBAUDIT, 1, [SELinux libaudit support]) |
ec23b9be UD |
1801 | fi |
1802 | AC_SUBST(have_libaudit) | |
1f063dca UD |
1803 | |
1804 | # See if we have the libcap library | |
1805 | AC_CHECK_LIB(cap, cap_init, have_libcap=yes, have_libcap=no) | |
1806 | if test "x$have_libcap" = xyes; then | |
1807 | AC_DEFINE(HAVE_LIBCAP, 1, [SELinux libcap support]) | |
1808 | fi | |
1809 | AC_SUBST(have_libcap) | |
2fff3d93 UD |
1810 | fi |
1811 | AC_SUBST(have_selinux) | |
1812 | ||
8ed1e7d5 GK |
1813 | dnl check for the size of 'long double'. |
1814 | AC_CHECK_SIZEOF(long double, 0) | |
1815 | sizeof_long_double=$ac_cv_sizeof_long_double | |
1816 | AC_SUBST(sizeof_long_double) | |
1817 | ||
61653dfb RM |
1818 | CPPUNDEFS= |
1819 | dnl Check for silly hacked compilers predefining _FORTIFY_SOURCE. | |
1820 | dnl Since we are building the implementations of the fortified functions here, | |
1821 | dnl having the macro defined interacts very badly. | |
1822 | AC_CACHE_CHECK([for _FORTIFY_SOURCE predefine], libc_cv_predef_fortify_source, | |
1823 | [AC_TRY_COMPILE([], [ | |
1824 | #ifdef _FORTIFY_SOURCE | |
1825 | # error bogon | |
1826 | #endif], | |
1827 | [libc_cv_predef_fortify_source=no], | |
1828 | [libc_cv_predef_fortify_source=yes])]) | |
1829 | if test $libc_cv_predef_fortify_source = yes; then | |
1830 | CPPUNDEFS="${CPPUNDEFS:+$CPPUNDEFS }-U_FORTIFY_SOURCE" | |
1831 | fi | |
1832 | AC_SUBST(CPPUNDEFS) | |
1833 | ||
30b99d79 RM |
1834 | dnl Check for silly hacked compilers inserting -fstack-protector. |
1835 | dnl This breaks badly for the early startup code we compile, since | |
1836 | dnl the compiled code can refer to a magic machine-dependent location | |
1837 | dnl for the canary value before we have sufficient setup for that to | |
1838 | dnl work. It's also questionable to build all of libc with this flag | |
1839 | dnl even when you're doing that for most applications you build, since | |
1840 | dnl libc's code is so heavily-used and performance-sensitive. If we | |
1841 | dnl ever really want to make that work, it should be enabled explicitly | |
1842 | dnl in the libc build, not inherited from implicit compiler settings. | |
1843 | AC_CACHE_CHECK([whether $CC implicitly enables -fstack-protector], | |
1844 | libc_cv_predef_stack_protector, [ | |
1845 | AC_TRY_COMPILE([extern void foobar (char *);], | |
1846 | [char large_array[2048]; foobar (large_array);], [ | |
1847 | libc_undefs=`$NM -u conftest.o | | |
1848 | LC_ALL=C $AWK '$1 == "U" { print $2 | "sort -u"; next } { exit(1) }' \ | |
1849 | 2>&AS_MESSAGE_LOG_FD` || { | |
1850 | AC_MSG_ERROR([confusing output from $NM -u]) | |
1851 | } | |
1852 | echo >&AS_MESSAGE_LOG_FD "libc_undefs='$libc_undefs'" | |
59f0c22e JM |
1853 | # On some architectures, there are architecture-specific undefined |
1854 | # symbols (resolved by the linker), so filter out unknown symbols. | |
1855 | # This will fail to produce the correct result if the compiler | |
1856 | # defaults to -fstack-protector but this produces an undefined symbol | |
1857 | # other than __stack_chk_fail. However, compilers like that have not | |
1858 | # been encountered in practice. | |
1859 | libc_undefs=`echo "$libc_undefs" | egrep '^(foobar|__stack_chk_fail)$'` | |
30b99d79 RM |
1860 | case "$libc_undefs" in |
1861 | foobar) libc_cv_predef_stack_protector=no ;; | |
1862 | '__stack_chk_fail | |
1863 | foobar') libc_cv_predef_stack_protector=yes ;; | |
1864 | *) AC_MSG_ERROR([unexpected symbols in test: $libc_undefs]) ;; | |
1865 | esac], | |
1866 | [AC_MSG_ERROR([test compilation failed])]) | |
1867 | ]) | |
1868 | libc_extra_cflags= | |
1869 | if test $libc_cv_predef_stack_protector = yes; then | |
7ffa9423 | 1870 | libc_extra_cflags="$libc_extra_cflags -fno-stack-protector" |
30b99d79 | 1871 | fi |
7ffa9423 | 1872 | libc_extra_cppflags= |
30b99d79 | 1873 | |
61b1ef6e MF |
1874 | # Some linkers on some architectures support __ehdr_start but with |
1875 | # bugs. Make sure usage of it does not create relocations in the | |
1876 | # output (as the linker should resolve them all for us). | |
1877 | AC_CACHE_CHECK([whether the linker provides working __ehdr_start], | |
44c4e5d5 RM |
1878 | libc_cv_ehdr_start, [ |
1879 | old_CFLAGS="$CFLAGS" | |
1880 | old_LDFLAGS="$LDFLAGS" | |
1881 | old_LIBS="$LIBS" | |
1882 | CFLAGS="$CFLAGS -fPIC" | |
1883 | LDFLAGS="$LDFLAGS -nostdlib -nostartfiles -shared" | |
1884 | LIBS= | |
1885 | AC_LINK_IFELSE([AC_LANG_SOURCE([ | |
61b1ef6e MF |
1886 | typedef struct { |
1887 | char foo; | |
1888 | long val; | |
1889 | } Ehdr; | |
1890 | extern const Ehdr __ehdr_start __attribute__ ((visibility ("hidden"))); | |
1891 | long ehdr (void) { return __ehdr_start.val; } | |
44c4e5d5 | 1892 | ])], |
61b1ef6e MF |
1893 | [if $READELF -r conftest | fgrep __ehdr_start >/dev/null; then |
1894 | libc_cv_ehdr_start=broken | |
1895 | else | |
1896 | libc_cv_ehdr_start=yes | |
1897 | fi], [libc_cv_ehdr_start=no]) | |
44c4e5d5 RM |
1898 | CFLAGS="$old_CFLAGS" |
1899 | LDFLAGS="$old_LDFLAGS" | |
1900 | LIBS="$old_LIBS" | |
1901 | ]) | |
61b1ef6e | 1902 | if test "$libc_cv_ehdr_start" = yes; then |
44c4e5d5 | 1903 | AC_DEFINE([HAVE_EHDR_START]) |
61b1ef6e MF |
1904 | elif test "$libc_cv_ehdr_start" = broken; then |
1905 | AC_MSG_WARN([linker is broken -- you should upgrade]) | |
9fe7e787 RM |
1906 | fi |
1907 | ||
1908 | AC_CACHE_CHECK(for __builtin_trap with no external dependencies, | |
1909 | libc_cv_builtin_trap, [dnl | |
1910 | libc_cv_builtin_trap=no | |
1911 | AC_TRY_COMPILE([], [__builtin_trap ()], [ | |
1912 | libc_undefs=`$NM -u conftest.o | | |
1913 | LC_ALL=C $AWK '$1 == "U" { print $2 | "sort -u"; next } { exit(1) }' \ | |
1914 | 2>&AS_MESSAGE_LOG_FD` || { | |
1915 | AC_MSG_ERROR([confusing output from $NM -u]) | |
1916 | } | |
1917 | echo >&AS_MESSAGE_LOG_FD "libc_undefs='$libc_undefs'" | |
1918 | if test -z "$libc_undefs"; then | |
1919 | libc_cv_builtin_trap=yes | |
1920 | fi])]) | |
1921 | if test $libc_cv_builtin_trap = yes; then | |
1922 | AC_DEFINE([HAVE_BUILTIN_TRAP]) | |
44c4e5d5 RM |
1923 | fi |
1924 | ||
c224a18a RM |
1925 | ### End of automated tests. |
1926 | ### Now run sysdeps configure fragments. | |
1927 | ||
cb343854 | 1928 | # They also can set these variables. |
591e1ffb | 1929 | use_ldconfig=no |
cb343854 | 1930 | ldd_rewrite_script=no |
77259608 | 1931 | libc_cv_sysconfdir=$sysconfdir |
4248b1b1 | 1932 | libc_cv_localstatedir=$localstatedir |
74bd2300 | 1933 | libc_cv_gcc_unwind_find_fde=no |
e2fd3cbe | 1934 | libc_cv_idn=no |
cb343854 | 1935 | |
28f540f4 | 1936 | # Iterate over all the sysdep directories we will use, running their |
09055553 | 1937 | # configure fragments. |
28f540f4 | 1938 | for dir in $sysnames; do |
57ba7bb4 UD |
1939 | case $dir in |
1940 | /*) dest=$dir ;; | |
1941 | *) dest=$srcdir/$dir ;; | |
1942 | esac | |
1943 | if test -r $dest/configure; then | |
d1149385 | 1944 | AC_MSG_RESULT(running configure fragment for $dir) |
57ba7bb4 | 1945 | . $dest/configure |
28f540f4 | 1946 | fi |
28f540f4 RM |
1947 | done |
1948 | ||
7ffa9423 AZ |
1949 | AC_SUBST(libc_extra_cflags) |
1950 | AC_SUBST(libc_extra_cppflags) | |
1951 | ||
74bd2300 UD |
1952 | if test x$libc_cv_gcc_unwind_find_fde = xyes; then |
1953 | AC_DEFINE(EXPORT_UNWIND_FIND_FDE) | |
1954 | fi | |
1955 | AC_SUBST(libc_cv_gcc_unwind_find_fde) | |
1956 | ||
6e6249d0 RM |
1957 | # A sysdeps configure fragment can reset this if IFUNC is not actually |
1958 | # usable even though the assembler knows how to generate the symbol type. | |
1959 | if test x"$libc_cv_ld_gnu_indirect_function" = xyes; then | |
1960 | AC_DEFINE(HAVE_IFUNC) | |
1961 | fi | |
1962 | ||
3cc3ef96 RM |
1963 | # This is far from the AC_ARG_ENABLE that sets it so that a sysdeps |
1964 | # configure fragment can override the value to prevent this AC_DEFINE. | |
1965 | AC_SUBST(use_nscd) | |
1966 | if test "x$use_nscd" != xno; then | |
1967 | AC_DEFINE([USE_NSCD]) | |
1968 | fi | |
c53d909c RM |
1969 | if test "x$build_nscd" = xdefault; then |
1970 | build_nscd=$use_nscd | |
1971 | fi | |
3cc3ef96 | 1972 | |
a53bad16 UD |
1973 | # Test for old glibc 2.0.x headers so that they can be removed properly |
1974 | # Search only in includedir. | |
1975 | AC_MSG_CHECKING(for old glibc 2.0.x headers) | |
350eb336 | 1976 | if eval test -f "${includedir}/elfclass.h" -a -f "${includedir}/fcntlbits.h" |
a53bad16 UD |
1977 | then |
1978 | old_glibc_headers=yes | |
1979 | else | |
1980 | old_glibc_headers=no | |
1981 | fi | |
1982 | AC_MSG_RESULT($old_glibc_headers) | |
1983 | if test ${old_glibc_headers} = yes; then | |
1984 | AC_MSG_WARN(*** During \"make install\" old headers from glibc 2.0.x will) | |
1985 | AC_MSG_WARN(*** be removed.) | |
1986 | fi | |
b195f6bc | 1987 | AC_SUBST(old_glibc_headers) |
26b4d766 | 1988 | |
84384f5b | 1989 | AC_SUBST(libc_cv_slibdir) |
aaa8cb4b | 1990 | AC_SUBST(libc_cv_rtlddir) |
a1d84548 | 1991 | AC_SUBST(libc_cv_localedir) |
77259608 | 1992 | AC_SUBST(libc_cv_sysconfdir) |
4248b1b1 | 1993 | AC_SUBST(libc_cv_localstatedir) |
1ef32c3d | 1994 | AC_SUBST(libc_cv_rootsbindir) |
bcd5f356 | 1995 | AC_SUBST(libc_cv_forced_unwind) |
1ef32c3d | 1996 | |
f57f8055 RM |
1997 | if test x$use_ldconfig = xyes; then |
1998 | AC_DEFINE(USE_LDCONFIG) | |
1999 | fi | |
591e1ffb | 2000 | AC_SUBST(use_ldconfig) |
cb343854 | 2001 | AC_SUBST(ldd_rewrite_script) |
84384f5b | 2002 | |
650425ce | 2003 | AC_SUBST(static) |
ff3d7ed3 | 2004 | AC_SUBST(shared) |
a334319f | 2005 | |
ff886b82 UD |
2006 | AC_CACHE_CHECK([whether -fPIC is default], libc_cv_pic_default, |
2007 | [libc_cv_pic_default=yes | |
cc3fa755 | 2008 | cat > conftest.c <<EOF |
9756dfe1 | 2009 | #if defined __PIC__ || defined __pic__ || defined PIC || defined pic |
cc3fa755 UD |
2010 | # error PIC is default. |
2011 | #endif | |
2012 | EOF | |
0b4ee387 | 2013 | if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then |
ff886b82 | 2014 | libc_cv_pic_default=no |
cc3fa755 UD |
2015 | fi |
2016 | rm -f conftest.*]) | |
ff886b82 | 2017 | AC_SUBST(libc_cv_pic_default) |
cc3fa755 | 2018 | |
ff3d7ed3 | 2019 | AC_SUBST(profile) |
5107cf1d | 2020 | AC_SUBST(static_nss) |
ff3d7ed3 | 2021 | |
edf5b2d7 UD |
2022 | AC_SUBST(DEFINES) |
2023 | ||
cb8a6dbd | 2024 | dnl See sysdeps/mach/configure.ac for this variable. |
61c83c3f RM |
2025 | AC_SUBST(mach_interface_list) |
2026 | ||
ee74a442 UD |
2027 | VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h` |
2028 | RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h` | |
df4ef2ab | 2029 | AC_SUBST(VERSION) |
ee74a442 | 2030 | AC_SUBST(RELEASE) |
df4ef2ab | 2031 | |
728e272a | 2032 | AC_CONFIG_FILES([config.make Makefile]) |
c118d634 | 2033 | AC_CONFIG_COMMANDS([default],[[ |
737547be UD |
2034 | case $CONFIG_FILES in *config.make*) |
2035 | echo "$config_vars" >> config.make;; | |
2036 | esac | |
c118d634 RM |
2037 | test -d bits || mkdir bits]],[[config_vars='$config_vars']]) |
2038 | AC_OUTPUT |