]>
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. |
02d35f06 PE |
3 | AC_INIT([GNU C Library], [(see version.h)], [https://sourceware.org/bugzilla/], |
4 | [glibc], [https://www.gnu.org/software/glibc/]) | |
5d77b1da | 5 | AC_CONFIG_SRCDIR([include/features.h]) |
6b7f6183 RM |
6 | AC_CONFIG_HEADERS([config.h]) |
7 | AC_CONFIG_AUX_DIR([scripts]) | |
28f540f4 | 8 | |
8b748aed | 9 | ACX_PKGVERSION([GNU libc]) |
5a82c748 | 10 | ACX_BUGURL([https://www.gnu.org/software/libc/bugs.html]) |
8b748aed JM |
11 | AC_DEFINE_UNQUOTED([PKGVERSION], ["$PKGVERSION"], |
12 | [Package description]) | |
13 | AC_DEFINE_UNQUOTED([REPORT_BUGS_TO], ["$REPORT_BUGS_TO"], | |
14 | [Bug reporting address]) | |
15 | ||
918b5606 L |
16 | # Glibc should not depend on any header files |
17 | AC_DEFUN([_AC_INCLUDES_DEFAULT_REQUIREMENTS], | |
18 | [m4_divert_text([DEFAULTS], | |
19 | [ac_includes_default='/* none */'])]) | |
20 | ||
bb931195 TS |
21 | # We require GCC, and by default use its preprocessor. Override AC_PROG_CPP |
22 | # here to work around the Autoconf issue discussed in | |
a306c790 | 23 | # <https://sourceware.org/ml/libc-alpha/2013-01/msg00721.html>. |
bb931195 TS |
24 | AC_DEFUN([AC_PROG_CPP], |
25 | [AC_REQUIRE([AC_PROG_CC])dnl | |
26 | AC_ARG_VAR([CPP], [C preprocessor])dnl | |
27 | _AC_ARG_VAR_CPPFLAGS()dnl | |
28 | # On Suns, sometimes $CPP names a directory. | |
29 | if test -n "$CPP" && test -d "$CPP"; then | |
30 | CPP= | |
31 | fi | |
32 | if test -z "$CPP"; then | |
33 | CPP="$CC -E" | |
34 | fi | |
35 | AC_SUBST(CPP)dnl | |
36 | ])# AC_PROG_CPP | |
37 | ||
b5a5da23 TS |
38 | # We require GCC. Override _AC_PROG_CC_C89 here to work around the Autoconf |
39 | # issue discussed in | |
a306c790 | 40 | # <https://sourceware.org/ml/libc-alpha/2013-01/msg00757.html>. |
b5a5da23 TS |
41 | AC_DEFUN([_AC_PROG_CC_C89], [[$1]]) |
42 | ||
7967983f RM |
43 | dnl This is here so we can set $subdirs directly based on configure fragments. |
44 | AC_CONFIG_SUBDIRS() | |
45 | ||
c16a054d AS |
46 | AC_CANONICAL_HOST |
47 | ||
c0bac8b0 UD |
48 | AC_PROG_CC |
49 | if test $host != $build; then | |
50 | AC_CHECK_PROGS(BUILD_CC, gcc cc) | |
51 | fi | |
52 | AC_SUBST(cross_compiling) | |
53 | AC_PROG_CPP | |
e4693aa7 RM |
54 | AC_CHECK_TOOL(READELF, readelf, false) |
55 | ||
c0bac8b0 UD |
56 | # We need the C++ compiler only for testing. |
57 | AC_PROG_CXX | |
e4693aa7 RM |
58 | # It's useless to us if it can't link programs (e.g. missing -lstdc++). |
59 | AC_CACHE_CHECK([whether $CXX can link programs], libc_cv_cxx_link_ok, [dnl | |
60 | AC_LANG_PUSH([C++]) | |
d337ceb7 | 61 | # Default, dynamic case. |
e4693aa7 RM |
62 | AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], |
63 | [libc_cv_cxx_link_ok=yes], | |
64 | [libc_cv_cxx_link_ok=no]) | |
d337ceb7 FW |
65 | # Static case. |
66 | old_LDFLAGS="$LDFLAGS" | |
67 | LDFLAGS="$LDFLAGS -static" | |
68 | AC_LINK_IFELSE([AC_LANG_SOURCE([ | |
69 | #include <iostream> | |
70 | ||
71 | int | |
72 | main() | |
73 | { | |
74 | std::cout << "Hello, world!"; | |
75 | return 0; | |
76 | } | |
77 | ])], | |
78 | [], | |
79 | [libc_cv_cxx_link_ok=no]) | |
80 | LDFLAGS="$old_LDFLAGS" | |
e4693aa7 RM |
81 | AC_LANG_POP([C++])]) |
82 | AS_IF([test $libc_cv_cxx_link_ok != yes], [CXX=]) | |
c0bac8b0 | 83 | |
db340c90 | 84 | if test "`cd $srcdir; pwd -P`" = "`pwd -P`"; then |
c72637d4 RM |
85 | AC_MSG_ERROR([you must configure in a separate build directory]) |
86 | fi | |
87 | ||
28f540f4 RM |
88 | # This will get text that should go into config.make. |
89 | config_vars= | |
90 | ||
c8f3e6db | 91 | # Check for a --with-gd argument and set libgd-LDFLAGS in config.make. |
6b7f6183 | 92 | AC_ARG_WITH([gd], |
77e8bddf AS |
93 | AC_HELP_STRING([--with-gd=DIR], |
94 | [find libgd include dir and library with prefix DIR]), | |
c8f3e6db UD |
95 | [dnl |
96 | case "$with_gd" in | |
f5f7239f UD |
97 | yes|''|no) ;; |
98 | *) libgd_include="-I$withval/include" | |
c8f3e6db UD |
99 | libgd_ldflags="-L$withval/lib" ;; |
100 | esac | |
101 | ]) | |
6b7f6183 | 102 | AC_ARG_WITH([gd-include], |
77e8bddf AS |
103 | AC_HELP_STRING([--with-gd-include=DIR], |
104 | [find libgd include files in DIR]), | |
105 | [dnl | |
f5f7239f UD |
106 | case "$with_gd_include" in |
107 | ''|no) ;; | |
108 | *) libgd_include="-I$withval" ;; | |
109 | esac | |
110 | ]) | |
6b7f6183 | 111 | AC_ARG_WITH([gd-lib], |
77e8bddf AS |
112 | AC_HELP_STRING([--with-gd-lib=DIR], |
113 | [find libgd library files in DIR]), | |
114 | [dnl | |
f5f7239f UD |
115 | case "$with_gd_lib" in |
116 | ''|no) ;; | |
117 | *) libgd_ldflags="-L$withval" ;; | |
118 | esac | |
119 | ]) | |
120 | ||
121 | if test -n "$libgd_include"; then | |
122 | config_vars="$config_vars | |
cf90163d | 123 | CFLAGS-memusagestat.c = $libgd_include" |
f5f7239f UD |
124 | fi |
125 | if test -n "$libgd_ldflags"; then | |
126 | config_vars="$config_vars | |
127 | libgd-LDFLAGS = $libgd_ldflags" | |
128 | fi | |
28f540f4 | 129 | |
ff3d7ed3 | 130 | dnl Arguments to specify presence of other packages/features. |
6b7f6183 | 131 | AC_ARG_WITH([binutils], |
77e8bddf AS |
132 | AC_HELP_STRING([--with-binutils=PATH], |
133 | [specify location of binutils (as and ld)]), | |
6b7f6183 RM |
134 | [path_binutils=$withval], |
135 | [path_binutils='']) | |
2fff3d93 | 136 | AC_ARG_WITH([selinux], |
77e8bddf AS |
137 | AC_HELP_STRING([--with-selinux], |
138 | [if building with SELinux support]), | |
2fff3d93 UD |
139 | [with_selinux=$withval], |
140 | [with_selinux=auto]) | |
28f540f4 | 141 | |
6b7f6183 | 142 | AC_ARG_WITH([headers], |
77e8bddf AS |
143 | AC_HELP_STRING([--with-headers=PATH], |
144 | [location of system headers to use | |
6b7f6183 RM |
145 | (for example /usr/src/linux/include) |
146 | @<:@default=compiler default@:>@]), | |
147 | [sysheaders=$withval], | |
148 | [sysheaders='']) | |
c91c505f | 149 | AC_SUBST(sysheaders) |
dbe7a0f5 | 150 | |
f781ef40 RM |
151 | AC_SUBST(use_default_link) |
152 | AC_ARG_WITH([default-link], | |
153 | AC_HELP_STRING([--with-default-link], | |
fd5e21c7 | 154 | [do not use explicit linker scripts]), |
f781ef40 | 155 | [use_default_link=$withval], |
fd5e21c7 | 156 | [use_default_link=default]) |
f781ef40 | 157 | |
6413fcde FW |
158 | dnl Additional build flags injection. |
159 | AC_ARG_WITH([nonshared-cflags], | |
160 | AC_HELP_STRING([--with-nonshared-cflags=CFLAGS], | |
161 | [build nonshared libraries with additional CFLAGS]), | |
162 | [extra_nonshared_cflags=$withval], | |
163 | [extra_nonshared_cflags=]) | |
164 | AC_SUBST(extra_nonshared_cflags) | |
165 | ||
6b7f6183 | 166 | AC_ARG_ENABLE([sanity-checks], |
77e8bddf AS |
167 | AC_HELP_STRING([--disable-sanity-checks], |
168 | [really do not use threads (should not be used except in special situations) @<:@default=yes@:>@]), | |
6b7f6183 RM |
169 | [enable_sanity=$enableval], |
170 | [enable_sanity=yes]) | |
a18f587d | 171 | |
6b7f6183 | 172 | AC_ARG_ENABLE([shared], |
77e8bddf | 173 | AC_HELP_STRING([--enable-shared], |
a0da5fe1 | 174 | [build shared library @<:@default=yes if GNU ld@:>@]), |
6b7f6183 | 175 | [shared=$enableval], |
a0da5fe1 | 176 | [shared=yes]) |
6b7f6183 | 177 | AC_ARG_ENABLE([profile], |
77e8bddf AS |
178 | AC_HELP_STRING([--enable-profile], |
179 | [build profiled library @<:@default=no@:>@]), | |
6b7f6183 | 180 | [profile=$enableval], |
11bf311e | 181 | [profile=no]) |
9d7a3741 L |
182 | AC_ARG_ENABLE([static-pie], |
183 | AC_HELP_STRING([--enable-static-pie], | |
184 | [enable static PIE support and use it in the testsuite @<:@default=no@:>@]), | |
185 | [static_pie=$enableval], | |
186 | [static_pie=no]) | |
1cba4036 MF |
187 | AC_ARG_ENABLE([timezone-tools], |
188 | AC_HELP_STRING([--disable-timezone-tools], | |
44f826e3 | 189 | [do not install timezone tools @<:@default=install@:>@]), |
1cba4036 MF |
190 | [enable_timezone_tools=$enableval], |
191 | [enable_timezone_tools=yes]) | |
192 | AC_SUBST(enable_timezone_tools) | |
6b7f6183 | 193 | |
740b3dbe L |
194 | AC_ARG_ENABLE([hardcoded-path-in-tests], |
195 | AC_HELP_STRING([--enable-hardcoded-path-in-tests], | |
196 | [hardcode newly built glibc path in tests @<:@default=no@:>@]), | |
197 | [hardcoded_path_in_tests=$enableval], | |
198 | [hardcoded_path_in_tests=no]) | |
199 | AC_SUBST(hardcoded_path_in_tests) | |
200 | ||
35f1e827 UD |
201 | AC_ARG_ENABLE([stackguard-randomization], |
202 | AC_HELP_STRING([--enable-stackguard-randomization], | |
203 | [initialize __stack_chk_guard canary with a random number at program start]), | |
204 | [enable_stackguard_randomize=$enableval], | |
205 | [enable_stackguard_randomize=no]) | |
206 | if test "$enable_stackguard_randomize" = yes; then | |
207 | AC_DEFINE(ENABLE_STACKGUARD_RANDOMIZE) | |
208 | fi | |
209 | ||
6b7f6183 | 210 | AC_ARG_ENABLE([hidden-plt], |
77e8bddf AS |
211 | AC_HELP_STRING([--disable-hidden-plt], |
212 | [do not hide internal function calls to avoid PLT]), | |
6b7f6183 RM |
213 | [hidden=$enableval], |
214 | [hidden=yes]) | |
749a9a4f RM |
215 | if test "x$hidden" = xno; then |
216 | AC_DEFINE(NO_HIDDEN) | |
217 | fi | |
218 | ||
4df8c11d UD |
219 | AC_ARG_ENABLE([bind-now], |
220 | AC_HELP_STRING([--enable-bind-now], | |
221 | [disable lazy relocations in DSOs]), | |
222 | [bindnow=$enableval], | |
223 | [bindnow=no]) | |
224 | AC_SUBST(bindnow) | |
6901def6 L |
225 | if test "x$bindnow" = xyes; then |
226 | AC_DEFINE(BIND_NOW) | |
227 | fi | |
4df8c11d | 228 | |
03baef1c NA |
229 | dnl Build glibc with -fstack-protector, -fstack-protector-all, or |
230 | dnl -fstack-protector-strong. | |
231 | AC_ARG_ENABLE([stack-protector], | |
232 | AC_HELP_STRING([--enable-stack-protector=@<:@yes|no|all|strong@:>@], | |
233 | [Use -fstack-protector[-all|-strong] to detect glibc buffer overflows]), | |
234 | [enable_stack_protector=$enableval], | |
235 | [enable_stack_protector=no]) | |
236 | case "$enable_stack_protector" in | |
237 | all|yes|no|strong) ;; | |
238 | *) AC_MSG_ERROR([Not a valid argument for --enable-stack-protector: \"$enable_stack_protector\"]);; | |
239 | esac | |
240 | ||
5107cf1d UD |
241 | dnl On some platforms we cannot use dynamic loading. We must provide |
242 | dnl static NSS modules. | |
6b7f6183 | 243 | AC_ARG_ENABLE([static-nss], |
77e8bddf AS |
244 | AC_HELP_STRING([--enable-static-nss], |
245 | [build static NSS modules @<:@default=no@:>@]), | |
6b7f6183 RM |
246 | [static_nss=$enableval], |
247 | [static_nss=no]) | |
834cef7c UD |
248 | dnl Enable static NSS also if we build no shared objects. |
249 | if test x"$static_nss" = xyes || test x"$shared" = xno; then | |
3172f58f | 250 | static_nss=yes |
5107cf1d UD |
251 | AC_DEFINE(DO_STATIC_NSS) |
252 | fi | |
253 | ||
6b7f6183 | 254 | AC_ARG_ENABLE([force-install], |
77e8bddf AS |
255 | AC_HELP_STRING([--disable-force-install], |
256 | [don't force installation of files from this package, even if they are older than the installed files]), | |
6b7f6183 RM |
257 | [force_install=$enableval], |
258 | [force_install=yes]) | |
73237de3 UD |
259 | AC_SUBST(force_install) |
260 | ||
8894bad3 AM |
261 | AC_ARG_ENABLE([maintainer-mode], |
262 | AC_HELP_STRING([--enable-maintainer-mode], | |
263 | [enable make rules and dependencies not useful (and sometimes confusing) to the casual installer]), | |
264 | [maintainer=$enableval], | |
265 | [maintainer=no]) | |
266 | ||
958f238f UD |
267 | dnl On some platforms we allow dropping compatibility with all kernel |
268 | dnl versions. | |
6b7f6183 | 269 | AC_ARG_ENABLE([kernel], |
77e8bddf AS |
270 | AC_HELP_STRING([--enable-kernel=VERSION], |
271 | [compile for compatibility with kernel not older than VERSION]), | |
6b7f6183 RM |
272 | [minimum_kernel=$enableval], |
273 | []) | |
86cfe82d UD |
274 | dnl Prevent unreasonable values. |
275 | if test "$minimum_kernel" = yes || test "$minimum_kernel" = no; then | |
276 | # Better nothing than this. | |
277 | minimum_kernel="" | |
269e369f UD |
278 | else |
279 | if test "$minimum_kernel" = current; then | |
280 | minimum_kernel=`uname -r 2>/dev/null` || minimum_kernel= | |
281 | fi | |
86cfe82d | 282 | fi |
958f238f | 283 | |
6cc7d725 UD |
284 | dnl For the development we sometimes want gcc to issue even more warnings. |
285 | dnl This is not the default since many of the extra warnings are not | |
286 | dnl appropriate. | |
6b7f6183 RM |
287 | AC_ARG_ENABLE([all-warnings], |
288 | AC_HELP_STRING([--enable-all-warnings], | |
77e8bddf | 289 | [enable all useful warnings gcc can issue]), |
6b7f6183 RM |
290 | [all_warnings=$enableval], |
291 | []) | |
6cc7d725 UD |
292 | AC_SUBST(all_warnings) |
293 | ||
a4ecc9eb JM |
294 | AC_ARG_ENABLE([werror], |
295 | AC_HELP_STRING([--disable-werror], | |
296 | [do not build with -Werror]), | |
297 | [enable_werror=$enableval], | |
298 | [enable_werror=yes]) | |
299 | AC_SUBST(enable_werror) | |
300 | ||
425ce2ed UD |
301 | AC_ARG_ENABLE([multi-arch], |
302 | AC_HELP_STRING([--enable-multi-arch], | |
303 | [enable single DSO with optimizations for multiple architectures]), | |
304 | [multi_arch=$enableval], | |
6f89d2f3 | 305 | [multi_arch=default]) |
425ce2ed | 306 | |
d5c3fafc DD |
307 | AC_ARG_ENABLE([experimental-malloc], |
308 | AC_HELP_STRING([--disable-experimental-malloc], | |
309 | [disable experimental malloc features]), | |
310 | [experimental_malloc=$enableval], | |
311 | [experimental_malloc=yes]) | |
312 | AC_SUBST(experimental_malloc) | |
313 | ||
e69d994a ZW |
314 | AC_ARG_ENABLE([crypt], |
315 | AC_HELP_STRING([--disable-crypt], | |
316 | [do not build nor install the passphrase hashing library, libcrypt]), | |
317 | [build_crypt=$enableval], | |
318 | [build_crypt=yes]) | |
319 | AC_SUBST(build_crypt) | |
320 | ||
ff886b82 UD |
321 | AC_ARG_ENABLE([nss-crypt], |
322 | AC_HELP_STRING([--enable-nss-crypt], | |
323 | [enable libcrypt to use nss]), | |
324 | [nss_crypt=$enableval], | |
325 | [nss_crypt=no]) | |
e69d994a ZW |
326 | if test x$build_libcrypt = xno && test x$nss_crypt = xyes; then |
327 | AC_MSG_WARN([--enable-nss-crypt has no effect when libcrypt is disabled]) | |
328 | nss_crypt=no | |
329 | fi | |
ff886b82 UD |
330 | if test x$nss_crypt = xyes; then |
331 | nss_includes=-I$(nss-config --includedir 2>/dev/null) | |
332 | if test $? -ne 0; then | |
333 | AC_MSG_ERROR([cannot find include directory with nss-config]) | |
334 | fi | |
57b4af19 GT |
335 | nspr_includes=-I$(nspr-config --includedir 2>/dev/null) |
336 | if test $? -ne 0; then | |
337 | AC_MSG_ERROR([cannot find include directory with nspr-config]) | |
338 | fi | |
ff886b82 | 339 | old_CFLAGS="$CFLAGS" |
57b4af19 | 340 | CFLAGS="$CFLAGS $nss_includes $nspr_includes" |
b68e08db | 341 | AC_COMPILE_IFELSE([AC_LANG_PROGRAM([typedef int PRBool; |
ff886b82 UD |
342 | #include <hasht.h> |
343 | #include <nsslowhash.h> | |
b68e08db | 344 | void f (void) { NSSLOW_Init (); }])], |
ff886b82 UD |
345 | libc_cv_nss_crypt=yes, |
346 | AC_MSG_ERROR([ | |
347 | cannot find NSS headers with lowlevel hash function interfaces])) | |
348 | old_LIBS="$LIBS" | |
84aa7516 | 349 | old_LDFLAGS="$LDFLAGS" |
ff886b82 UD |
350 | LIBS="$LIBS -lfreebl3" |
351 | AC_LINK_IFELSE([AC_LANG_PROGRAM([typedef int PRBool; | |
352 | #include <hasht.h> | |
353 | #include <nsslowhash.h>], | |
354 | [NSSLOW_Init();])], | |
355 | libc_cv_nss_crypt=yes, | |
356 | AC_MSG_ERROR([ | |
357 | cannot link program using lowlevel NSS hash functions])) | |
84aa7516 CD |
358 | # Check to see if there is a static NSS cryptographic library. |
359 | # If there isn't then we can't link anything with libcrypt.a, | |
360 | # and that might mean disabling some static tests. | |
361 | LDFLAGS="$LDFLAGS -static" | |
362 | AC_LINK_IFELSE([AC_LANG_PROGRAM([typedef int PRBool; | |
363 | #include <hasht.h> | |
364 | #include <nsslowhash.h>], | |
365 | [NSSLOW_Init();])], | |
366 | libc_cv_static_nss_crypt=yes, | |
367 | libc_cv_static_nss_crypt=no) | |
368 | LDFLAGS="$old_LDFLAGS" | |
ff886b82 UD |
369 | CFLAGS="$old_CFLAGS" |
370 | LIBS="$old_LIBS" | |
371 | else | |
372 | libc_cv_nss_crypt=no | |
84aa7516 | 373 | libc_cv_static_nss_crypt=no |
ff886b82 UD |
374 | fi |
375 | AC_SUBST(libc_cv_nss_crypt) | |
84aa7516 | 376 | AC_SUBST(libc_cv_static_nss_crypt) |
ff886b82 | 377 | |
3a097cc7 | 378 | |
021db4be AJ |
379 | AC_ARG_ENABLE([obsolete-rpc], |
380 | AC_HELP_STRING([--enable-obsolete-rpc], | |
381 | [build and install the obsolete RPC code for link-time usage]), | |
382 | [link_obsolete_rpc=$enableval], | |
383 | [link_obsolete_rpc=no]) | |
384 | AC_SUBST(link_obsolete_rpc) | |
385 | ||
386 | if test "$link_obsolete_rpc" = yes; then | |
387 | AC_DEFINE(LINK_OBSOLETE_RPC) | |
388 | fi | |
389 | ||
1e4d83f6 TK |
390 | AC_ARG_ENABLE([obsolete-nsl], |
391 | AC_HELP_STRING([--enable-obsolete-nsl], | |
392 | [build and install the obsolete libnsl library and depending NSS modules]), | |
393 | [build_obsolete_nsl=$enableval], | |
394 | [build_obsolete_nsl=no]) | |
395 | AC_SUBST(build_obsolete_nsl) | |
396 | ||
397 | if test "$build_obsolete_nsl" = yes; then | |
398 | AC_DEFINE(LINK_OBSOLETE_NSL) | |
399 | fi | |
400 | ||
3a097cc7 RM |
401 | AC_ARG_ENABLE([systemtap], |
402 | [AS_HELP_STRING([--enable-systemtap], | |
403 | [enable systemtap static probe points @<:@default=no@:>@])], | |
404 | [systemtap=$enableval], | |
405 | [systemtap=no]) | |
406 | if test "x$systemtap" != xno; then | |
407 | AC_CACHE_CHECK([for systemtap static probe support], libc_cv_sdt, [dnl | |
408 | old_CFLAGS="$CFLAGS" | |
783dd2d3 | 409 | CFLAGS="-std=gnu11 $CFLAGS" |
0e3933b9 | 410 | AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#include <sys/sdt.h> |
3a097cc7 RM |
411 | void foo (int i, void *p) |
412 | { | |
413 | asm ("" STAP_PROBE_ASM (foo, bar, STAP_PROBE_ASM_TEMPLATE (2)) "" | |
414 | :: STAP_PROBE_ASM_OPERANDS (2, i, p)); | |
0e3933b9 | 415 | }]])], [libc_cv_sdt=yes], [libc_cv_sdt=no]) |
3a097cc7 RM |
416 | CFLAGS="$old_CFLAGS"]) |
417 | if test $libc_cv_sdt = yes; then | |
418 | AC_DEFINE([USE_STAP_PROBE]) | |
419 | elif test "x$systemtap" != xauto; then | |
420 | AC_MSG_FAILURE([systemtap support needs sys/sdt.h with asm support]) | |
421 | fi | |
422 | fi | |
423 | ||
c53d909c RM |
424 | AC_ARG_ENABLE([build-nscd], |
425 | [AS_HELP_STRING([--disable-build-nscd], | |
426 | [disable building and installing the nscd daemon])], | |
427 | [build_nscd=$enableval], | |
428 | [build_nscd=default]) | |
429 | AC_SUBST(build_nscd) | |
430 | ||
3cc3ef96 RM |
431 | # Note the use of $use_nscd is near the bottom of the file. |
432 | AC_ARG_ENABLE([nscd], | |
433 | [AS_HELP_STRING([--disable-nscd], | |
434 | [library functions will not contact the nscd daemon])], | |
435 | [use_nscd=$enableval], | |
436 | [use_nscd=yes]) | |
437 | ||
e4608715 CD |
438 | AC_ARG_ENABLE([pt_chown], |
439 | [AS_HELP_STRING([--enable-pt_chown], | |
440 | [Enable building and installing pt_chown])], | |
441 | [build_pt_chown=$enableval], | |
442 | [build_pt_chown=no]) | |
443 | AC_SUBST(build_pt_chown) | |
8c12f01d | 444 | if test "$build_pt_chown" = yes; then |
e4608715 CD |
445 | AC_DEFINE(HAVE_PT_CHOWN) |
446 | fi | |
447 | ||
67e58f39 SP |
448 | AC_ARG_ENABLE([tunables], |
449 | [AS_HELP_STRING([--enable-tunables], | |
6765d5d3 | 450 | [Enable tunables support. Known values are 'yes', 'no' and 'valstring'])], |
67e58f39 | 451 | [have_tunables=$enableval], |
2c0b90ab | 452 | [have_tunables=yes]) |
67e58f39 SP |
453 | AC_SUBST(have_tunables) |
454 | if test "$have_tunables" = yes; then | |
455 | AC_DEFINE(HAVE_TUNABLES) | |
456 | fi | |
457 | ||
ebf27d12 ST |
458 | # The abi-tags file uses a fairly simplistic model for name recognition that |
459 | # can't distinguish i486-pc-linux-gnu fully from i486-pc-gnu. So we mutate a | |
460 | # $host_os of `gnu*' here to be `gnu-gnu*' just so that it can tell. | |
461 | # This doesn't get used much beyond that, so it's fairly safe. | |
462 | case "$host_os" in | |
463 | linux*) | |
464 | ;; | |
465 | gnu*) | |
466 | host_os=`echo $host_os | sed -e 's/gnu/gnu-gnu/'` | |
467 | ;; | |
468 | esac | |
469 | ||
5695d46f AS |
470 | AC_ARG_ENABLE([mathvec], |
471 | [AS_HELP_STRING([--enable-mathvec], | |
472 | [Enable building and installing mathvec @<:@default depends on architecture@:>@])], | |
473 | [build_mathvec=$enableval], | |
474 | [build_mathvec=notset]) | |
475 | ||
9fb81390 FW |
476 | AC_TRY_COMPILE([], [ |
477 | #ifndef __CET__ | |
478 | # error no CET compiler support | |
479 | #endif], | |
480 | [libc_cv_compiler_default_cet=yes], | |
481 | [libc_cv_compiler_default_cet=no]) | |
482 | ||
f753fa7d L |
483 | AC_ARG_ENABLE([cet], |
484 | AC_HELP_STRING([--enable-cet], | |
485 | [enable Intel Control-flow Enforcement Technology (CET), x86 only]), | |
486 | [enable_cet=$enableval], | |
9fb81390 | 487 | [enable_cet=$libc_cv_compiler_default_cet]) |
f753fa7d | 488 | |
28f540f4 RM |
489 | # We keep the original values in `$config_*' and never modify them, so we |
490 | # can write them unchanged into config.make. Everything else uses | |
491 | # $machine, $vendor, and $os, and changes them whenever convenient. | |
492 | config_machine=$host_cpu config_vendor=$host_vendor config_os=$host_os | |
493 | ||
2f64b655 UD |
494 | # Don't allow vendor == "unknown" |
495 | test "$config_vendor" = unknown && config_vendor= | |
496 | config_os="`echo $config_os | sed 's/^unknown-//'`" | |
497 | ||
a2fe9c76 | 498 | # Some configurations imply other options. |
0269750c | 499 | elf=yes |
a2fe9c76 | 500 | |
644d3857 | 501 | # The configure fragment of a port can modify these to supplement |
8f73811b RM |
502 | # or override the table in the case statement below. No fragment should |
503 | # ever change the config_* variables, however. | |
28f540f4 RM |
504 | machine=$config_machine |
505 | vendor=$config_vendor | |
506 | os=$config_os | |
b22d21b3 | 507 | base_os='' |
28f540f4 | 508 | |
2ceaa76a RM |
509 | submachine= |
510 | AC_ARG_WITH([cpu], | |
511 | AS_HELP_STRING([--with-cpu=CPU], [select code for CPU variant]), | |
512 | [dnl | |
513 | case "$withval" in | |
514 | yes|'') AC_MSG_ERROR([--with-cpu requires an argument]) ;; | |
515 | no) ;; | |
516 | *) submachine="$withval" ;; | |
517 | esac | |
518 | ]) | |
519 | ||
05439291 RM |
520 | # An preconfigure script can set this when it wants to disable the sanity |
521 | # check below. | |
522 | libc_config_ok=no | |
523 | ||
8df5d347 JM |
524 | # A preconfigure script for a system that may or may not use fpu |
525 | # sysdeps directories sets this to a preprocessor conditional for | |
526 | # whether to use such directories. | |
527 | with_fp_cond=1 | |
528 | ||
644d3857 | 529 | dnl Let sysdeps/*/preconfigure act here. |
10a803e0 RM |
530 | LIBC_PRECONFIGURE([$srcdir], [for sysdeps]) |
531 | ||
8f73811b | 532 | |
bdc8eb03 UD |
533 | ### |
534 | ### By using the undocumented --enable-hacker-mode option for configure | |
535 | ### one can skip this test to make the configuration not fail for unsupported | |
536 | ### platforms. | |
537 | ### | |
8f73811b | 538 | if test -z "$enable_hacker_mode" && test x"$libc_config_ok" != xyes; then |
bdc8eb03 | 539 | case "$machine-$host_os" in |
2ce4f015 | 540 | *-linux* | *-gnu*) |
bdc8eb03 UD |
541 | ;; |
542 | *) | |
4e58b648 MF |
543 | AC_MSG_ERROR([ |
544 | *** The GNU C library is currently unavailable for this platform. | |
545 | *** If you are interested in seeing glibc on this platform visit | |
546 | *** the "How to submit a new port" in the wiki: | |
547 | *** https://sourceware.org/glibc/wiki/#Development | |
548 | *** and join the community!]) | |
bdc8eb03 UD |
549 | ;; |
550 | esac | |
551 | fi | |
552 | ||
3e239be6 JM |
553 | # Set base_machine if not set by a preconfigure fragment. |
554 | test -n "$base_machine" || base_machine=$machine | |
f0523145 | 555 | AC_SUBST(base_machine) |
28f540f4 | 556 | |
8df5d347 JM |
557 | # Determine whether to use fpu or nofpu sysdeps directories. |
558 | AC_CACHE_CHECK([for use of fpu sysdeps directories], | |
559 | libc_cv_with_fp, [dnl | |
560 | cat > conftest.c <<EOF | |
561 | #if $with_fp_cond | |
562 | int dummy; | |
563 | #else | |
564 | # error "no hardware floating point" | |
565 | #endif | |
566 | EOF | |
567 | libc_cv_with_fp=no | |
568 | if ${CC-cc} $CFLAGS $CPPFLAGS -S conftest.c -o conftest.s \ | |
569 | 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD ; then | |
570 | libc_cv_with_fp=yes | |
571 | fi | |
572 | rm -f conftest*]) | |
573 | AC_SUBST(libc_cv_with_fp) | |
574 | ||
03baef1c NA |
575 | AC_CACHE_CHECK(for -fstack-protector, libc_cv_ssp, [dnl |
576 | LIBC_TRY_CC_OPTION([$CFLAGS $CPPFLAGS -Werror -fstack-protector], | |
577 | [libc_cv_ssp=yes], | |
578 | [libc_cv_ssp=no]) | |
579 | ]) | |
580 | ||
581 | AC_CACHE_CHECK(for -fstack-protector-strong, libc_cv_ssp_strong, [dnl | |
582 | LIBC_TRY_CC_OPTION([$CFLAGS $CPPFLAGS -Werror -fstack-protector-strong], | |
583 | [libc_cv_ssp_strong=yes], | |
584 | [libc_cv_ssp_strong=no]) | |
585 | ]) | |
586 | ||
587 | AC_CACHE_CHECK(for -fstack-protector-all, libc_cv_ssp_all, [dnl | |
588 | LIBC_TRY_CC_OPTION([$CFLAGS $CPPFLAGS -Werror -fstack-protector-all], | |
589 | [libc_cv_ssp_all=yes], | |
590 | [libc_cv_ssp_all=no]) | |
591 | ]) | |
592 | ||
593 | stack_protector= | |
594 | no_stack_protector= | |
595 | if test "$libc_cv_ssp" = yes; then | |
596 | no_stack_protector="-fno-stack-protector -DSTACK_PROTECTOR_LEVEL=0" | |
de659123 | 597 | AC_DEFINE(HAVE_CC_NO_STACK_PROTECTOR) |
03baef1c NA |
598 | fi |
599 | ||
600 | if test "$enable_stack_protector" = yes && test "$libc_cv_ssp" = yes; then | |
601 | stack_protector="-fstack-protector" | |
602 | AC_DEFINE(STACK_PROTECTOR_LEVEL, 1) | |
603 | elif test "$enable_stack_protector" = all && test "$libc_cv_ssp_all" = yes; then | |
604 | stack_protector="-fstack-protector-all" | |
605 | AC_DEFINE(STACK_PROTECTOR_LEVEL, 2) | |
606 | elif test "$enable_stack_protector" = strong && test "$libc_cv_ssp_strong" = yes; then | |
607 | stack_protector="-fstack-protector-strong" | |
608 | AC_DEFINE(STACK_PROTECTOR_LEVEL, 3) | |
66a704c4 NA |
609 | else |
610 | stack_protector="-fno-stack-protector" | |
611 | AC_DEFINE(STACK_PROTECTOR_LEVEL, 0) | |
03baef1c NA |
612 | fi |
613 | AC_SUBST(libc_cv_ssp) | |
614 | AC_SUBST(stack_protector) | |
615 | AC_SUBST(no_stack_protector) | |
616 | ||
66a704c4 NA |
617 | if test -n "$stack_protector"; then |
618 | dnl Don't run configure tests with stack-protection on, to avoid problems with | |
619 | dnl bootstrapping. | |
620 | no_ssp=-fno-stack-protector | |
621 | else | |
622 | no_ssp= | |
623 | ||
624 | if test "$enable_stack_protector" != no; then | |
625 | AC_MSG_ERROR([--enable-stack-protector=$enable_stack_protector specified, but specified level of stack protection is not supported by the compiler.]) | |
626 | fi | |
627 | fi | |
628 | ||
0cae3f4b MF |
629 | # For the multi-arch option we need support in the assembler & linker. |
630 | AC_CACHE_CHECK([for assembler and linker STT_GNU_IFUNC support], | |
631 | libc_cv_ld_gnu_indirect_function, [dnl | |
786b0b67 | 632 | cat > conftest.S <<EOF |
84b9230c | 633 | .type foo,%gnu_indirect_function |
0cae3f4b MF |
634 | foo: |
635 | .globl _start | |
636 | _start: | |
637 | .globl __start | |
638 | __start: | |
639 | .data | |
786b0b67 AS |
640 | #ifdef _LP64 |
641 | .quad foo | |
642 | #else | |
0cae3f4b | 643 | .long foo |
786b0b67 | 644 | #endif |
84b9230c | 645 | EOF |
0cae3f4b MF |
646 | libc_cv_ld_gnu_indirect_function=no |
647 | if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \ | |
66a704c4 | 648 | -nostartfiles -nostdlib $no_ssp \ |
786b0b67 | 649 | -o conftest conftest.S 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then |
0cae3f4b MF |
650 | # Do a link to see if the backend supports IFUNC relocs. |
651 | $READELF -r conftest 1>&AS_MESSAGE_LOG_FD | |
652 | LC_ALL=C $READELF -r conftest | grep 'no relocations' >/dev/null || { | |
653 | libc_cv_ld_gnu_indirect_function=yes | |
654 | } | |
84b9230c MF |
655 | fi |
656 | rm -f conftest*]) | |
657 | ||
022dfdce SL |
658 | # Check if gcc supports attribute ifunc as it is used in libc_ifunc macro. |
659 | AC_CACHE_CHECK([for gcc attribute ifunc support], | |
660 | libc_cv_gcc_indirect_function, [dnl | |
661 | cat > conftest.c <<EOF | |
662 | extern int func (int); | |
663 | int used_func (int a) | |
664 | { | |
665 | return a; | |
666 | } | |
667 | static void *resolver () | |
668 | { | |
669 | return &used_func; | |
670 | } | |
671 | extern __typeof (func) func __attribute__ ((ifunc ("resolver"))); | |
672 | EOF | |
673 | libc_cv_gcc_indirect_function=no | |
674 | if ${CC-cc} -c conftest.c -o conftest.o 1>&AS_MESSAGE_LOG_FD \ | |
675 | 2>&AS_MESSAGE_LOG_FD ; then | |
676 | if $READELF -s conftest.o | grep IFUNC >/dev/null 2>&AS_MESSAGE_LOG_FD; then | |
677 | libc_cv_gcc_indirect_function=yes | |
678 | fi | |
679 | fi | |
680 | rm -f conftest*]) | |
681 | ||
b5c45e83 AZ |
682 | # Check if linker supports textrel relocation with ifunc (used on elf/tests). |
683 | # Note that it relies on libc_cv_ld_gnu_indirect_function test above. | |
684 | AC_CACHE_CHECK([whether the linker supports textrels along with ifunc], | |
685 | libc_cv_textrel_ifunc, [dnl | |
686 | cat > conftest.S <<EOF | |
687 | .type foo,%gnu_indirect_function | |
688 | foo: | |
689 | .globl _start | |
690 | _start: | |
691 | .globl __start | |
692 | __start: | |
693 | .data | |
694 | #ifdef _LP64 | |
695 | .quad foo | |
696 | #else | |
697 | .long foo | |
698 | #endif | |
699 | .text | |
700 | .globl address | |
701 | address: | |
702 | #ifdef _LP64 | |
703 | .quad address | |
704 | #else | |
705 | .long address | |
706 | #endif | |
707 | EOF | |
708 | libc_cv_textrel_ifunc=no | |
709 | if test $libc_cv_ld_gnu_indirect_function = yes; then | |
710 | if AC_TRY_COMMAND(${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -nostartfiles -nostdlib $no_ssp -pie -o conftest conftest.S); then | |
711 | libc_cv_textrel_ifunc=yes | |
712 | fi | |
713 | fi | |
714 | rm -f conftest*]) | |
715 | AC_SUBST(libc_cv_textrel_ifunc) | |
716 | ||
8f6f5362 AZ |
717 | # Check if gcc warns about alias for function with incompatible types. |
718 | AC_CACHE_CHECK([if compiler warns about alias for function with incompatible types], | |
719 | libc_cv_gcc_incompatible_alias, [dnl | |
720 | cat > conftest.c <<EOF | |
721 | int __redirect_foo (const void *s, int c); | |
722 | ||
723 | __typeof (__redirect_foo) *foo_impl (void) __asm__ ("foo"); | |
724 | __typeof (__redirect_foo) *foo_impl (void) | |
725 | { | |
726 | return 0; | |
727 | } | |
728 | ||
729 | extern __typeof (__redirect_foo) foo_alias __attribute__ ((alias ("foo"))); | |
730 | EOF | |
731 | libc_cv_gcc_incompatible_alias=yes | |
732 | if ${CC-cc} -Werror -c conftest.c -o conftest.o 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD ; then | |
733 | libc_cv_gcc_incompatible_alias=no | |
734 | fi | |
735 | rm -f conftest*]) | |
736 | ||
0cae3f4b | 737 | if test x"$libc_cv_ld_gnu_indirect_function" != xyes; then |
84b9230c MF |
738 | if test x"$multi_arch" = xyes; then |
739 | AC_MSG_ERROR([--enable-multi-arch support requires assembler and linker support]) | |
740 | else | |
741 | multi_arch=no | |
742 | fi | |
743 | fi | |
8f6f5362 AZ |
744 | if test x"$libc_cv_gcc_indirect_function" != xyes; then |
745 | # GCC 8+ emits a warning for alias with incompatible types and it might | |
746 | # fail to build ifunc resolvers aliases to either weak or internal | |
747 | # symbols. Disables multiarch build in this case. | |
748 | if test x"$libc_cv_gcc_incompatible_alias" == xyes; then | |
749 | AC_MSG_WARN([gcc emits a warning for alias between functions of incompatible types]) | |
750 | if test x"$multi_arch" = xyes; then | |
751 | AC_MSG_ERROR([--enable-multi-arch support requires a gcc with gnu-indirect-function support]) | |
752 | fi | |
753 | AC_MSG_WARN([Multi-arch is disabled.]) | |
754 | multi_arch=no | |
755 | elif test x"$multi_arch" = xyes; then | |
756 | AC_MSG_WARN([--enable-multi-arch support recommends a gcc with gnu-indirect-function support. | |
022dfdce | 757 | Please use a gcc which supports it by default or configure gcc with --enable-gnu-indirect-function]) |
8f6f5362 | 758 | fi |
022dfdce | 759 | fi |
6270516e | 760 | multi_arch_d= |
84b9230c MF |
761 | if test x"$multi_arch" != xno; then |
762 | multi_arch_d=/multiarch | |
763 | fi | |
764 | ||
f0523145 | 765 | # Compute the list of sysdep directories for this configuration. |
f332db02 | 766 | # This can take a while to compute. |
f0523145 | 767 | sysdep_dir=$srcdir/sysdeps |
f332db02 | 768 | AC_MSG_CHECKING(sysdep dirs) |
f0523145 RM |
769 | dnl We need to use [ and ] for other purposes for a while now. |
770 | changequote(,)dnl | |
28f540f4 RM |
771 | # Make sco3.2v4 become sco3.2.4 and sunos4.1.1_U1 become sunos4.1.1.U1. |
772 | os="`echo $os | sed 's/\([0-9A-Z]\)[v_]\([0-9A-Z]\)/\1.\2/g'`" | |
773 | ||
b22d21b3 | 774 | test "x$base_os" != x || case "$os" in |
28f540f4 RM |
775 | gnu*) |
776 | base_os=mach/hurd ;; | |
2ce4f015 | 777 | linux*) |
28f540f4 | 778 | base_os=unix/sysv ;; |
28f540f4 RM |
779 | esac |
780 | ||
781 | # For sunos4.1.1, try sunos4.1.1, then sunos4.1, then sunos4, then sunos. | |
782 | tail=$os | |
783 | ostry=$os | |
784 | while o=`echo $tail | sed 's/\.[^.]*$//'`; test $o != $tail; do | |
785 | ostry="$ostry /$o" | |
786 | tail=$o | |
75914335 | 787 | done |
28f540f4 RM |
788 | o=`echo $tail | sed 's/[0-9]*$//'` |
789 | if test $o != $tail; then | |
790 | ostry="$ostry /$o" | |
791 | fi | |
ec4b0518 UD |
792 | # For linux-gnu, try linux-gnu, then linux. |
793 | o=`echo $tail | sed 's/-.*$//'` | |
794 | if test $o != $tail; then | |
795 | ostry="$ostry /$o" | |
796 | fi | |
28f540f4 RM |
797 | |
798 | # For unix/sysv/sysv4, try unix/sysv/sysv4, then unix/sysv, then unix. | |
799 | base= | |
800 | tail=$base_os | |
801 | while b=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$b"; do | |
802 | set $b | |
803 | base="$base /$1" | |
804 | tail="$2" | |
805 | done | |
806 | ||
ae6b8730 | 807 | # For sparc/sparc32, try sparc/sparc32 and then sparc. |
28f540f4 | 808 | mach= |
2ceaa76a | 809 | tail=$machine${submachine:+/$submachine} |
28f540f4 RM |
810 | while m=`echo $tail | sed 's@^\(.*\)/\([^/]*\)$@& \1@'`; test -n "$m"; do |
811 | set $m | |
10ceac89 | 812 | # Prepend the machine's FPU directory unless --without-fp. |
8df5d347 | 813 | if test "$libc_cv_with_fp" = yes; then |
6270516e | 814 | maybe_fpu=/fpu |
f4b07664 | 815 | else |
6270516e | 816 | maybe_fpu=/nofpu |
82d00cab | 817 | fi |
6270516e RM |
818 | # For each machine term, try it with and then without /multiarch. |
819 | for try_fpu in $maybe_fpu ''; do | |
820 | for try_multi in $multi_arch_d ''; do | |
821 | mach="$mach /$1$try_fpu$try_multi" | |
822 | done | |
823 | done | |
28f540f4 RM |
824 | tail="$2" |
825 | done | |
826 | ||
827 | dnl We are done with glob and regexp uses of [ and ]; return to autoconf. | |
828 | changequote([,])dnl | |
829 | ||
830 | # Find what sysdep directories exist. | |
831 | sysnames= | |
4b69abad RM |
832 | for b in $base ''; do |
833 | for m0 in $mach ''; do | |
834 | for v in /$vendor ''; do | |
835 | test "$v" = / && continue | |
836 | for o in /$ostry ''; do | |
837 | test "$o" = / && continue | |
6270516e | 838 | for m in $mach ''; do |
644d3857 JM |
839 | try_suffix="$m0$b$v$o$m" |
840 | if test -n "$try_suffix"; then | |
841 | try_srcdir="${srcdir}/" | |
842 | try="sysdeps$try_suffix" | |
843 | test -n "$enable_debug_configure" && | |
844 | echo "$0 [DEBUG]: try $try" >&2 | |
845 | if test -d "$try_srcdir$try"; then | |
846 | sysnames="$sysnames $try" | |
847 | { test -n "$o" || test -n "$b"; } && os_used=t | |
848 | { test -n "$m" || test -n "$m0"; } && machine_used=t | |
849 | case x${m0:-$m} in | |
850 | x*/$submachine) submachine_used=t ;; | |
851 | esac | |
852 | fi | |
853 | fi | |
28f540f4 RM |
854 | done |
855 | done | |
856 | done | |
857 | done | |
4b69abad | 858 | done |
28f540f4 | 859 | |
6f89d2f3 L |
860 | # If the assembler supports gnu_indirect_function symbol type and the |
861 | # architecture supports multi-arch, we enable multi-arch by default. | |
644d3857 | 862 | case $sysnames in |
84b9230c MF |
863 | *"$multi_arch_d"*) |
864 | ;; | |
865 | *) | |
77e8bddf | 866 | test x"$multi_arch" = xdefault && multi_arch=no |
84b9230c MF |
867 | ;; |
868 | esac | |
869 | if test x"$multi_arch" != xno; then | |
6f89d2f3 L |
870 | AC_DEFINE(USE_MULTIARCH) |
871 | fi | |
872 | AC_SUBST(multi_arch) | |
873 | ||
28f540f4 RM |
874 | if test -z "$os_used" && test "$os" != none; then |
875 | AC_MSG_ERROR(Operating system $os is not supported.) | |
876 | fi | |
877 | if test -z "$machine_used" && test "$machine" != none; then | |
878 | AC_MSG_ERROR(The $machine is not supported.) | |
879 | fi | |
2ceaa76a RM |
880 | if test -z "$submachine_used" && test -n "$submachine"; then |
881 | AC_MSG_ERROR(The $submachine subspecies of $host_cpu is not supported.) | |
882 | fi | |
883 | AC_SUBST(submachine) | |
28f540f4 RM |
884 | |
885 | # We have now validated the configuration. | |
886 | ||
28f540f4 RM |
887 | # Expand the list of system names into a full list of directories |
888 | # from each element's parent name and Implies file (if present). | |
889 | set $sysnames | |
e50ec9f9 | 890 | names= |
28f540f4 RM |
891 | while test $# -gt 0; do |
892 | name=$1 | |
893 | shift | |
894 | ||
e50ec9f9 | 895 | case " $names " in *" $name "*) |
f332db02 RM |
896 | # Already in the list. |
897 | continue | |
e50ec9f9 | 898 | esac |
f332db02 RM |
899 | |
900 | # Report each name as we discover it, so there is no long pause in output. | |
0b4ee387 | 901 | echo $ECHO_N "$name $ECHO_C" >&AS_MESSAGE_FD |
f332db02 | 902 | |
57ba7bb4 UD |
903 | name_base=`echo $name | sed -e 's@\(.*sysdeps\)/.*@\1@'` |
904 | ||
905 | case $name in | |
906 | /*) xsrcdir= ;; | |
907 | *) xsrcdir=$srcdir/ ;; | |
908 | esac | |
909 | test -n "$enable_debug_configure" && | |
910 | echo "[DEBUG]: name/Implies $xsrcdir$name/Implies" >&2 | |
911 | ||
ba75122d RM |
912 | for implies_file in Implies Implies-before Implies-after; do |
913 | implies_type=`echo $implies_file | sed s/-/_/` | |
914 | eval ${implies_type}= | |
915 | if test -f $xsrcdir$name/$implies_file; then | |
916 | # Collect more names from the `Implies' file (removing comments). | |
917 | implied_candidate="`sed 's/#.*$//' < $xsrcdir$name/$implies_file`" | |
918 | for x in $implied_candidate; do | |
919 | found=no | |
920 | if test -d $xsrcdir$name_base/$x; then | |
921 | eval "${implies_type}=\"\$${implies_type} \$name_base/\$x\"" | |
636ccfc8 | 922 | found=yes |
ba75122d | 923 | fi |
644d3857 JM |
924 | try="sysdeps/$x" |
925 | try_srcdir=$srcdir/ | |
926 | test -n "$enable_debug_configure" && | |
927 | echo "[DEBUG]: $name $implies_file $x try() {$try_srcdir}$try" >&2 | |
928 | if test $try != $xsrcdir$name_base/$x && test -d $try_srcdir$try; | |
929 | then | |
930 | eval "${implies_type}=\"\$${implies_type} \$try\"" | |
931 | found=yes | |
932 | fi | |
ba75122d RM |
933 | if test $found = no; then |
934 | AC_MSG_WARN($name/$implies_file specifies nonexistent $x) | |
636ccfc8 UD |
935 | fi |
936 | done | |
ba75122d RM |
937 | fi |
938 | done | |
28f540f4 RM |
939 | |
940 | # Add NAME to the list of names. | |
941 | names="$names $name" | |
942 | ||
943 | # Find the parent of NAME, using the empty string if it has none. | |
944 | changequote(,)dnl | |
57ba7bb4 | 945 | parent="`echo $name | sed -n -e 's=/[^/]*$==' -e '/sysdeps$/q' -e p`" |
28f540f4 RM |
946 | changequote([,])dnl |
947 | ||
ba75122d RM |
948 | test -n "$enable_debug_configure" && |
949 | echo "[DEBUG]: $name Implies='$Implies' rest='$*' parent='$parent' \ | |
57633811 | 950 | Implies_before='$Implies_before' Implies_after='$Implies_after'" >&2 |
ba75122d | 951 | |
28f540f4 RM |
952 | # Add the names implied by NAME, and NAME's parent (if it has one), to |
953 | # the list of names to be processed (the argument list). We prepend the | |
954 | # implied names to the list and append the parent. We want implied | |
955 | # directories to come before further directories inferred from the | |
956 | # configuration components; this ensures that for sysv4, unix/common | |
957 | # (implied by unix/sysv/sysv4) comes before unix/sysv (in ostry (here $*) | |
958 | # after sysv4). | |
ba75122d | 959 | sysnames="`echo $Implies $* $Implies_before $parent $Implies_after`" |
28f540f4 RM |
960 | test -n "$sysnames" && set $sysnames |
961 | done | |
962 | ||
963 | # Add the default directories. | |
83ef87ba | 964 | default_sysnames="sysdeps/generic" |
ecdc196c | 965 | sysnames="$names $default_sysnames" |
f332db02 RM |
966 | AC_SUBST(sysnames) |
967 | # The other names were emitted during the scan. | |
ecdc196c | 968 | AC_MSG_RESULT($default_sysnames) |
28f540f4 | 969 | |
f332db02 RM |
970 | |
971 | ### Locate tools. | |
28f540f4 | 972 | |
28f540f4 | 973 | AC_PROG_INSTALL |
2b80a372 | 974 | if test "$INSTALL" = "${srcdir}/scripts/install-sh -c"; then |
28f540f4 | 975 | # The makefiles need to use a different form to find it in $srcdir. |
2b80a372 | 976 | INSTALL='\$(..)./scripts/install-sh -c' |
28f540f4 | 977 | fi |
0e3426bb | 978 | AC_PROG_LN_S |
ae828bc6 | 979 | |
4baa087a | 980 | LIBC_PROG_BINUTILS |
4baa087a | 981 | |
b4396163 | 982 | # Accept binutils 2.25 or newer. |
4baa087a RM |
983 | AC_CHECK_PROG_VER(AS, $AS, --version, |
984 | [GNU assembler.* \([0-9]*\.[0-9.]*\)], | |
b4396163 | 985 | [2.1[0-9][0-9]*|2.2[5-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*], |
bd805071 | 986 | AS=: critic_missing="$critic_missing as") |
f300dc73 L |
987 | |
988 | if test -n "`$LD --version | sed -n 's/^GNU \(gold\).*$/\1/p'`"; then | |
989 | # Accept gold 1.14 or higher | |
990 | AC_CHECK_PROG_VER(LD, $LD, --version, | |
991 | [GNU gold.* \([0-9][0-9]*\.[0-9.]*\)], | |
992 | [1.1[4-9]*|1.[2-9][0-9]*|1.1[0-9][0-9]*|[2-9].*|[1-9][0-9]*], | |
993 | LD=: critic_missing="$critic_missing GNU gold") | |
994 | else | |
995 | AC_CHECK_PROG_VER(LD, $LD, --version, | |
996 | [GNU ld.* \([0-9][0-9]*\.[0-9.]*\)], | |
073e8fa7 | 997 | [2.1[0-9][0-9]*|2.2[5-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*], |
f300dc73 L |
998 | LD=: critic_missing="$critic_missing GNU ld") |
999 | fi | |
4baa087a | 1000 | |
63bda0c1 | 1001 | # These programs are version sensitive. |
3a12e572 | 1002 | AC_CHECK_TOOL_PREFIX |
22e65f8f | 1003 | AC_CHECK_PROG_VER(MAKE, gnumake gmake make, --version, |
8fc1e2ca | 1004 | [GNU Make[^0-9]*\([0-9][0-9.]*\)], |
f2873d2d | 1005 | [[4-9].* | [1-9][0-9]*], critic_missing="$critic_missing make") |
63bda0c1 | 1006 | |
22e65f8f | 1007 | AC_CHECK_PROG_VER(MSGFMT, gnumsgfmt gmsgfmt msgfmt, --version, |
bdd421cc | 1008 | [GNU gettext.* \([0-9]*\.[0-9.]*\)], |
aefdff34 RM |
1009 | [0.10.3[6-9]* | 0.10.[4-9][0-9]* | 0.1[1-9]* | 0.[2-9][0-9]* | [1-9].*], |
1010 | MSGFMT=: aux_missing="$aux_missing msgfmt") | |
63bda0c1 | 1011 | AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version, |
8b7fb588 | 1012 | [GNU texinfo.* \([0-9][0-9.]*\)], |
3a12c70f | 1013 | [4.[7-9]*|4.[1-9][0-9]*|[5-9].*], |
aefdff34 | 1014 | MAKEINFO=: aux_missing="$aux_missing makeinfo") |
d6a97a28 | 1015 | AC_CHECK_PROG_VER(SED, sed, --version, |
07e51550 | 1016 | [GNU sed[^0-9]* \([0-9]*\.[0-9.]*\)], |
aefdff34 RM |
1017 | [3.0[2-9]*|3.[1-9]*|[4-9]*], |
1018 | SED=: aux_missing="$aux_missing sed") | |
0786794f AM |
1019 | AC_CHECK_PROG_VER(AWK, gawk, --version, |
1020 | [GNU Awk[^0-9]*\([0-9][0-9.]*\)], | |
12086fb4 | 1021 | [3.1.[2-9]*|3.[2-9]*|[4-9]*], critic_missing="$critic_missing gawk") |
1faaf703 JB |
1022 | AC_CHECK_PROG_VER(BISON, bison, --version, |
1023 | [bison (GNU Bison) \([0-9]*\.[0-9.]*\)], | |
1024 | [2.7*|[3-9].*|[1-9][0-9]*], critic_missing="$critic_missing bison") | |
63bda0c1 | 1025 | |
461a7b1e RM |
1026 | AC_CACHE_CHECK([if $CC is sufficient to build libc], libc_cv_compiler_ok, [ |
1027 | AC_TRY_COMPILE([], [ | |
4dcbbc3b | 1028 | #if !defined __GNUC__ || __GNUC__ < 6 || (__GNUC__ == 6 && __GNUC_MINOR__ < 2) |
461a7b1e RM |
1029 | #error insufficient compiler |
1030 | #endif], | |
1031 | [libc_cv_compiler_ok=yes], | |
1032 | [libc_cv_compiler_ok=no])]) | |
1033 | AS_IF([test $libc_cv_compiler_ok != yes], | |
1034 | [critic_missing="$critic_missing compiler"]) | |
1035 | ||
30b99d79 | 1036 | AC_CHECK_TOOL(NM, nm, false) |
d30cf5bb | 1037 | |
8894bad3 AM |
1038 | if test "x$maintainer" = "xyes"; then |
1039 | AC_CHECK_PROGS(AUTOCONF, autoconf, no) | |
1040 | case "x$AUTOCONF" in | |
1041 | xno|x|x:) AUTOCONF=no ;; | |
1042 | *) | |
1043 | AC_CACHE_CHECK(dnl | |
1044 | whether $AUTOCONF${ACFLAGS:+ }$ACFLAGS works, libc_cv_autoconf_works, [dnl | |
1045 | if (cd $srcdir; $AUTOCONF $ACFLAGS configure.ac > /dev/null 2>&1); then | |
1046 | libc_cv_autoconf_works=yes | |
1047 | else | |
1048 | libc_cv_autoconf_works=no | |
1049 | fi]) | |
1050 | test $libc_cv_autoconf_works = yes || AUTOCONF=no | |
1051 | ;; | |
1052 | esac | |
1053 | if test "x$AUTOCONF" = xno; then | |
1054 | aux_missing="$aux_missing autoconf" | |
1055 | fi | |
9e8ac24b AM |
1056 | else |
1057 | AUTOCONF=no | |
14519931 | 1058 | fi |
1400de2e | 1059 | |
8ce8299f | 1060 | # Check for python3 if available, or else python. |
c6982f7e JM |
1061 | AC_CHECK_PROG_VER(PYTHON_PROG, python3 python, --version, |
1062 | [Python \([0-9][0-9.]*\)], | |
1063 | [3.[4-9]*|3.[1-9][0-9]*|[4-9].*|[1-9][0-9]*], | |
1064 | critic_missing="$critic_missing python") | |
1065 | PYTHON="$PYTHON_PROG -B" | |
1066 | AC_SUBST(PYTHON) | |
8ce8299f | 1067 | |
32a448ed RM |
1068 | test -n "$critic_missing" && AC_MSG_ERROR([ |
1069 | *** These critical programs are missing or too old:$critic_missing | |
1070 | *** Check the INSTALL file for required versions.]) | |
1071 | ||
4bca4c17 | 1072 | test -n "$aux_missing" && AC_MSG_WARN([ |
9c6fffc0 | 1073 | *** These auxiliary programs are missing or incompatible versions:$aux_missing |
8ce8299f | 1074 | *** some features or tests will be disabled. |
63bda0c1 | 1075 | *** Check the INSTALL file for required versions.]) |
28f540f4 | 1076 | |
dbe7a0f5 UD |
1077 | # if using special system headers, find out the compiler's sekrit |
1078 | # header directory and add that to the list. NOTE: Only does the right | |
1079 | # thing on a system that doesn't need fixincludes. (Not presently a problem.) | |
1080 | if test -n "$sysheaders"; then | |
67fbfa5c RM |
1081 | SYSINCLUDES=-nostdinc |
1082 | for d in include include-fixed; do | |
1083 | i=`$CC -print-file-name="$d"` && test "x$i" != x && test "x$i" != "x$d" && | |
1084 | SYSINCLUDES="$SYSINCLUDES -isystem $i" | |
1085 | done | |
1086 | SYSINCLUDES="$SYSINCLUDES \ | |
3d6ce23a | 1087 | -isystem `echo $sysheaders | sed 's/:/ -isystem /g'`" |
ef226fec | 1088 | if test -n "$CXX"; then |
7872cfb0 | 1089 | CXX_SYSINCLUDES= |
67060746 AC |
1090 | for cxxheaders in `$CXX -v -S -x c++ /dev/null -o /dev/null 2>&1 \ |
1091 | | sed -n -e '1,/#include/d' -e 's/^ \(\/.*\/[cg]++\)/\1/p'`; do | |
1092 | test "x$cxxheaders" != x && | |
1093 | CXX_SYSINCLUDES="$CXX_SYSINCLUDES -isystem $cxxheaders" | |
1094 | done | |
ef226fec | 1095 | fi |
dbe7a0f5 UD |
1096 | fi |
1097 | AC_SUBST(SYSINCLUDES) | |
ef226fec | 1098 | AC_SUBST(CXX_SYSINCLUDES) |
dbe7a0f5 | 1099 | |
fc3e1337 FW |
1100 | # Obtain some C++ header file paths. This is used to make a local |
1101 | # copy of those headers in Makerules. | |
1102 | if test -n "$CXX"; then | |
1103 | find_cxx_header () { | |
c2528fef FW |
1104 | echo "#include <$1>" | $CXX -M -MP -x c++ - 2>/dev/null \ |
1105 | | sed -n "\,$1:,{s/:\$//;p}" | |
fc3e1337 FW |
1106 | } |
1107 | CXX_CSTDLIB_HEADER="$(find_cxx_header cstdlib)" | |
1108 | CXX_CMATH_HEADER="$(find_cxx_header cmath)" | |
a65ea28d | 1109 | CXX_BITS_STD_ABS_H="$(find_cxx_header bits/std_abs.h)" |
fc3e1337 FW |
1110 | fi |
1111 | AC_SUBST(CXX_CSTDLIB_HEADER) | |
1112 | AC_SUBST(CXX_CMATH_HEADER) | |
a65ea28d | 1113 | AC_SUBST(CXX_BITS_STD_ABS_H) |
fc3e1337 | 1114 | |
3911660e UD |
1115 | # Test if LD_LIBRARY_PATH contains the notation for the current directory |
1116 | # since this would lead to problems installing/building glibc. | |
1117 | # LD_LIBRARY_PATH contains the current directory if one of the following | |
1118 | # is true: | |
1119 | # - one of the terminals (":" and ";") is the first or last sign | |
1120 | # - two terminals occur directly after each other | |
1121 | # - the path contains an element with a dot in it | |
1122 | AC_MSG_CHECKING(LD_LIBRARY_PATH variable) | |
1123 | changequote(,)dnl | |
1124 | case ${LD_LIBRARY_PATH} in | |
1125 | [:\;]* | *[:\;] | *[:\;][:\;]* | *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* ) | |
b3a86ae1 | 1126 | ld_library_path_setting="contains current directory" |
3911660e UD |
1127 | ;; |
1128 | *) | |
1129 | ld_library_path_setting="ok" | |
1130 | ;; | |
1131 | esac | |
1132 | changequote([,])dnl | |
1133 | AC_MSG_RESULT($ld_library_path_setting) | |
1134 | if test "$ld_library_path_setting" != "ok"; then | |
63bda0c1 UD |
1135 | AC_MSG_ERROR([ |
1136 | *** LD_LIBRARY_PATH shouldn't contain the current directory when | |
1137 | *** building glibc. Please change the environment variable | |
1138 | *** and run configure again.]) | |
3911660e | 1139 | fi |
8e31cf7e | 1140 | |
26f56c1c | 1141 | AC_PATH_PROG(BASH_SHELL, bash, no) |
84384f5b | 1142 | |
c0016081 | 1143 | AC_PATH_PROG(PERL, perl, no) |
2fd5d029 RM |
1144 | if test "$PERL" != no && |
1145 | (eval `$PERL -V:apiversion`; test `expr "$apiversion" \< 5` -ne 0); then | |
1146 | PERL=no | |
ecb06196 | 1147 | fi |
2f512715 AS |
1148 | AC_PATH_PROG(INSTALL_INFO, install-info, no, |
1149 | $PATH:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin:/bin:/sbin) | |
2de00372 | 1150 | |
b8dc6a10 | 1151 | AC_CACHE_CHECK(for .set assembler directive, libc_cv_asm_set_directive, [dnl |
9a70fcab | 1152 | cat > conftest.s <<EOF |
8c0c01db | 1153 | .text |
ae1025be | 1154 | foo: |
df2a0c93 | 1155 | .set glibc_conftest_frobozz,foo |
7b8e0d49 | 1156 | .globl glibc_conftest_frobozz |
e215c478 | 1157 | EOF |
df2a0c93 RM |
1158 | # The alpha-dec-osf1 assembler gives only a warning for `.set' |
1159 | # (but it doesn't work), so we must do a linking check to be sure. | |
1160 | cat > conftest1.c <<\EOF | |
1161 | extern int glibc_conftest_frobozz; | |
640f0119 | 1162 | void _start() { glibc_conftest_frobozz = 1; } |
df2a0c93 RM |
1163 | EOF |
1164 | if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \ | |
66a704c4 | 1165 | -nostartfiles -nostdlib $no_ssp \ |
0b4ee387 | 1166 | -o conftest conftest.s conftest1.c 1>&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD; then |
e215c478 RM |
1167 | libc_cv_asm_set_directive=yes |
1168 | else | |
1169 | libc_cv_asm_set_directive=no | |
1170 | fi | |
65b3cbcb | 1171 | rm -f conftest*]) |
e215c478 RM |
1172 | if test $libc_cv_asm_set_directive = yes; then |
1173 | AC_DEFINE(HAVE_ASM_SET_DIRECTIVE) | |
1174 | fi | |
1175 | ||
2a723ff6 JM |
1176 | AC_CACHE_CHECK(linker support for protected data symbol, |
1177 | libc_cv_protected_data, | |
1178 | [cat > conftest.c <<EOF | |
1179 | int bar __attribute__ ((visibility ("protected"))) = 1; | |
83569fb8 | 1180 | EOF |
2a723ff6 | 1181 | libc_cv_protected_data=no |
66a704c4 | 1182 | if AC_TRY_COMMAND(${CC-cc} -nostdlib -nostartfiles $no_ssp -fPIC -shared conftest.c -o conftest.so); then |
2a723ff6 JM |
1183 | cat > conftest.c <<EOF |
1184 | extern int bar; | |
1185 | int main (void) { return bar; } | |
83569fb8 | 1186 | EOF |
66a704c4 | 1187 | if AC_TRY_COMMAND(${CC-cc} -nostdlib -nostartfiles $no_ssp conftest.c -o conftest conftest.so); then |
2a723ff6 | 1188 | libc_cv_protected_data=yes |
83569fb8 | 1189 | fi |
2a723ff6 JM |
1190 | fi |
1191 | rm -f conftest.* | |
1192 | ]) | |
83569fb8 L |
1193 | AC_SUBST(libc_cv_protected_data) |
1194 | ||
19f1a11e L |
1195 | AC_CACHE_CHECK(linker support for INSERT in linker script, |
1196 | libc_cv_insert, | |
1197 | [cat > conftest.c <<EOF | |
1198 | const int __attribute__ ((section(".bar"))) bar = 0x12345678; | |
1199 | int test (void) { return bar; } | |
1200 | EOF | |
1201 | cat > conftest.t <<EOF | |
1202 | SECTIONS | |
1203 | { | |
1204 | .bar : { *(.bar) } | |
1205 | } | |
1206 | INSERT AFTER .rela.dyn; | |
1207 | EOF | |
1208 | libc_cv_insert=no | |
1209 | if AC_TRY_COMMAND([${CC-cc} -nostdlib -nostartfiles $no_ssp -fPIC -shared conftest.c -Wl,-T,conftest.t -o conftest.so]); then | |
1210 | libc_cv_insert=yes | |
1211 | fi | |
1212 | rm -f conftest.* | |
1213 | ]) | |
1214 | AC_SUBST(libc_cv_insert) | |
1215 | ||
a0da5fe1 UD |
1216 | AC_CACHE_CHECK(for broken __attribute__((alias())), |
1217 | libc_cv_broken_alias_attribute, | |
1218 | [cat > conftest.c <<EOF | |
1219 | extern int foo (int x) __asm ("xyzzy"); | |
1220 | int bar (int x) { return x; } | |
1221 | extern __typeof (bar) foo __attribute ((weak, alias ("bar"))); | |
1222 | extern int dfoo; | |
1223 | extern __typeof (dfoo) dfoo __asm ("abccb"); | |
1224 | int dfoo = 1; | |
37ba7d66 | 1225 | EOF |
a0da5fe1 UD |
1226 | libc_cv_broken_alias_attribute=yes |
1227 | if AC_TRY_COMMAND(${CC-cc} -Werror -S conftest.c -o conftest.s 1>&AS_MESSAGE_LOG_FD); then | |
1228 | if grep 'xyzzy' conftest.s >/dev/null && | |
1229 | grep 'abccb' conftest.s >/dev/null; then | |
1230 | libc_cv_broken_alias_attribute=no | |
1231 | fi | |
1232 | fi | |
1233 | rm -f conftest.c conftest.s | |
1234 | ]) | |
1235 | if test $libc_cv_broken_alias_attribute = yes; then | |
1236 | AC_MSG_ERROR(working alias attribute support required) | |
1237 | fi | |
1238 | ||
2a723ff6 JM |
1239 | AC_CACHE_CHECK(whether to put _rtld_local into .sdata section, |
1240 | libc_cv_have_sdata_section, | |
1241 | [echo "int i;" > conftest.c | |
1242 | libc_cv_have_sdata_section=no | |
1243 | if ${CC-cc} $LDFLAGS -fPIC -shared -Wl,--verbose conftest.c -o conftest.so 2>&1 \ | |
1244 | | grep '\.sdata' >/dev/null; then | |
1245 | libc_cv_have_sdata_section=yes | |
1246 | fi | |
1247 | rm -f conftest.c conftest.so | |
1248 | ]) | |
1249 | if test $libc_cv_have_sdata_section = yes; then | |
1250 | AC_DEFINE(HAVE_SDATA_SECTION) | |
a0da5fe1 | 1251 | fi |
0d01dace | 1252 | |
a0da5fe1 UD |
1253 | AC_CACHE_CHECK(whether to use .ctors/.dtors header and trailer, |
1254 | libc_cv_ctors_header, [dnl | |
1255 | libc_cv_ctors_header=yes | |
07037eeb JM |
1256 | LIBC_TRY_LINK_STATIC([ |
1257 | __attribute__ ((constructor)) void ctor (void) { asm (""); } | |
1258 | __attribute__ ((destructor)) void dtor (void) { asm (""); } | |
113ddea4 | 1259 | ], |
a0da5fe1 | 1260 | [dnl |
113ddea4 | 1261 | AS_IF([$READELF -WS conftest$ac_exeext | $AWK ' |
92963737 | 1262 | { gsub(/\@<:@ */, "@<:@") } |
113ddea4 RM |
1263 | $2 == ".ctors" || $2 == ".dtors" { |
1264 | size = strtonum("0x" $6) | |
1265 | align = strtonum("0x" $NF) | |
1266 | seen@<:@$2@:>@ = 1 | |
1267 | stub@<:@$2@:>@ = size == align * 2 | |
92963737 | 1268 | } |
113ddea4 RM |
1269 | END { |
1270 | ctors_ok = !seen@<:@".ctors"@:>@ || stub@<:@".ctors"@:>@ | |
1271 | dtors_ok = !seen@<:@".dtors"@:>@ || stub@<:@".dtors"@:>@ | |
1272 | exit ((ctors_ok && dtors_ok) ? 0 : 1) | |
1273 | } | |
1274 | '], [libc_cv_ctors_header=no]) | |
1275 | ], [dnl | |
1276 | AC_MSG_ERROR([missing __attribute__ ((constructor)) support??]) | |
1277 | ]) | |
a0da5fe1 UD |
1278 | ]) |
1279 | if test $libc_cv_ctors_header = no; then | |
1280 | AC_DEFINE(NO_CTORS_DTORS_SECTIONS) | |
1281 | fi | |
5241882c | 1282 | |
a0da5fe1 UD |
1283 | AC_CACHE_CHECK(for libunwind-support in compiler, |
1284 | libc_cv_cc_with_libunwind, [ | |
1285 | cat > conftest.c <<EOF | |
cbdb12de UD |
1286 | int main (void) { return 0; } |
1287 | EOF | |
a0da5fe1 | 1288 | if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS -static -o conftest \ |
8175a253 | 1289 | conftest.c -v 2>&1 >/dev/null | grep ' -lunwind ' >/dev/null; then |
a0da5fe1 UD |
1290 | libc_cv_cc_with_libunwind=yes |
1291 | else | |
1292 | libc_cv_cc_with_libunwind=no | |
c776b3d7 | 1293 | fi |
a0da5fe1 UD |
1294 | rm -f conftest*]) |
1295 | AC_SUBST(libc_cv_cc_with_libunwind) | |
1296 | if test $libc_cv_cc_with_libunwind = yes; then | |
1297 | AC_DEFINE(HAVE_CC_WITH_LIBUNWIND) | |
1298 | fi | |
c776b3d7 | 1299 | |
a0da5fe1 UD |
1300 | ASFLAGS_config= |
1301 | AC_CACHE_CHECK(whether --noexecstack is desirable for .S files, | |
1302 | libc_cv_as_noexecstack, [dnl | |
1303 | cat > conftest.c <<EOF | |
35915ec8 UD |
1304 | void foo (void) { } |
1305 | EOF | |
a0da5fe1 UD |
1306 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS |
1307 | -S -o conftest.s conftest.c 1>&AS_MESSAGE_LOG_FD]) \ | |
8175a253 | 1308 | && grep .note.GNU-stack conftest.s >/dev/null \ |
a0da5fe1 UD |
1309 | && AC_TRY_COMMAND([${CC-cc} $ASFLAGS -Wa,--noexecstack |
1310 | -c -o conftest.o conftest.s 1>&AS_MESSAGE_LOG_FD]) | |
1311 | then | |
1312 | libc_cv_as_noexecstack=yes | |
1313 | else | |
1314 | libc_cv_as_noexecstack=no | |
1315 | fi | |
1316 | rm -f conftest*]) | |
1317 | if test $libc_cv_as_noexecstack = yes; then | |
1318 | ASFLAGS_config="$ASFLAGS_config -Wa,--noexecstack" | |
1319 | fi | |
1320 | AC_SUBST(ASFLAGS_config) | |
2abf9ff1 | 1321 | |
a0da5fe1 UD |
1322 | AC_CACHE_CHECK(for -z combreloc, |
1323 | libc_cv_z_combreloc, [dnl | |
1324 | cat > conftest.c <<EOF | |
d555194c UD |
1325 | extern int bar (int); |
1326 | extern int mumble; | |
1327 | int foo (void) { return bar (mumble); } | |
a711b01d | 1328 | EOF |
a0da5fe1 | 1329 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS |
66a704c4 | 1330 | -fPIC -shared $no_ssp -o conftest.so conftest.c |
35cd3c97 | 1331 | -nostdlib -nostartfiles |
c2f55635 | 1332 | -Wl,-z,combreloc 1>&AS_MESSAGE_LOG_FD]) |
a0da5fe1 | 1333 | then |
a711b01d UD |
1334 | dnl The following test is a bit weak. We must use a tool which can test |
1335 | dnl cross-platform since the gcc used can be a cross compiler. Without | |
1336 | dnl introducing new options this is not easily doable. Instead use a tool | |
1337 | dnl which always is cross-platform: readelf. To detect whether -z combreloc | |
e37fc4aa AN |
1338 | dnl look for a section named .rel.dyn or .rela.dyn. |
1339 | if $READELF -S conftest.so | grep -E '.rela?.dyn' > /dev/null; then | |
a0da5fe1 | 1340 | libc_cv_z_combreloc=yes |
fdde8349 UD |
1341 | else |
1342 | libc_cv_z_combreloc=no | |
a711b01d | 1343 | fi |
a0da5fe1 UD |
1344 | else |
1345 | libc_cv_z_combreloc=no | |
1346 | fi | |
1347 | rm -f conftest*]) | |
1348 | if test "$libc_cv_z_combreloc" = yes; then | |
1349 | AC_DEFINE(HAVE_Z_COMBRELOC) | |
1350 | fi | |
1351 | AC_SUBST(libc_cv_z_combreloc) | |
2abf9ff1 | 1352 | |
6bfea974 L |
1353 | LIBC_LINKER_FEATURE([-z execstack], [-Wl,-z,execstack], |
1354 | [libc_cv_z_execstack=yes], [libc_cv_z_execstack=no]) | |
a0da5fe1 | 1355 | AC_SUBST(libc_cv_z_execstack) |
c9c60884 | 1356 | |
9d7a3741 L |
1357 | LIBC_LINKER_FEATURE([--no-dynamic-linker], |
1358 | [-Wl,--no-dynamic-linker], | |
1359 | [libc_cv_no_dynamic_linker=yes], | |
1360 | [libc_cv_no_dynamic_linker=no]) | |
1361 | LIBC_CONFIG_VAR([have-no-dynamic-linker], [$libc_cv_no_dynamic_linker]) | |
1362 | ||
1363 | AC_CACHE_CHECK(for -static-pie, libc_cv_static_pie, [dnl | |
1364 | LIBC_TRY_CC_OPTION([-static-pie], | |
1365 | [libc_cv_static_pie=yes], | |
1366 | [libc_cv_static_pie=no]) | |
1367 | ]) | |
1368 | LIBC_CONFIG_VAR([have-static-pie], [$libc_cv_static_pie]) | |
1369 | ||
a0da5fe1 | 1370 | AC_CACHE_CHECK(for -fpie, libc_cv_fpie, [dnl |
4da0431d JM |
1371 | LIBC_TRY_CC_OPTION([-fpie], [libc_cv_fpie=yes], [libc_cv_fpie=no]) |
1372 | ]) | |
c9c60884 | 1373 | |
a0da5fe1 | 1374 | AC_SUBST(libc_cv_fpie) |
871b9158 | 1375 | |
a0da5fe1 UD |
1376 | AC_CACHE_CHECK(for --hash-style option, |
1377 | libc_cv_hashstyle, [dnl | |
1378 | cat > conftest.c <<EOF | |
871b9158 UD |
1379 | int _start (void) { return 42; } |
1380 | EOF | |
66a704c4 | 1381 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp |
a0da5fe1 UD |
1382 | -fPIC -shared -o conftest.so conftest.c |
1383 | -Wl,--hash-style=both -nostdlib 1>&AS_MESSAGE_LOG_FD]) | |
1384 | then | |
1385 | libc_cv_hashstyle=yes | |
1386 | else | |
1387 | libc_cv_hashstyle=no | |
1388 | fi | |
1389 | rm -f conftest*]) | |
1390 | AC_SUBST(libc_cv_hashstyle) | |
1391 | ||
1392 | # The linker's default -shared behavior is good enough if it | |
1393 | # does these things that our custom linker scripts ensure that | |
1394 | # all allocated NOTE sections come first. | |
1395 | if test "$use_default_link" = default; then | |
1396 | AC_CACHE_CHECK([for sufficient default -shared layout], | |
1397 | libc_cv_use_default_link, [dnl | |
1398 | libc_cv_use_default_link=no | |
1399 | cat > conftest.s <<\EOF | |
fd5e21c7 RM |
1400 | .section .note.a,"a",%note |
1401 | .balign 4 | |
1402 | .long 4,4,9 | |
1403 | .string "GNU" | |
1404 | .string "foo" | |
1405 | .section .note.b,"a",%note | |
1406 | .balign 4 | |
1407 | .long 4,4,9 | |
1408 | .string "GNU" | |
1409 | .string "bar" | |
1410 | EOF | |
a0da5fe1 | 1411 | if AC_TRY_COMMAND([dnl |
fd5e21c7 RM |
1412 | ${CC-cc} $ASFLAGS -shared -o conftest.so conftest.s 1>&AS_MESSAGE_LOG_FD]) && |
1413 | ac_try=`$READELF -S conftest.so | sed -n \ | |
1414 | ['${x;p;} | |
1415 | s/^ *\[ *[1-9][0-9]*\] *\([^ ][^ ]*\) *\([^ ][^ ]*\) .*$/\2 \1/ | |
1416 | t a | |
1417 | b | |
1418 | : a | |
1419 | H']` | |
a0da5fe1 UD |
1420 | then |
1421 | libc_seen_a=no libc_seen_b=no | |
1422 | set -- $ac_try | |
1423 | while test $# -ge 2 -a "$1" = NOTE; do | |
1424 | case "$2" in | |
1425 | .note.a) libc_seen_a=yes ;; | |
1426 | .note.b) libc_seen_b=yes ;; | |
1427 | esac | |
1428 | shift 2 | |
1429 | done | |
1430 | case "$libc_seen_a$libc_seen_b" in | |
1431 | yesyes) | |
1432 | libc_cv_use_default_link=yes | |
1433 | ;; | |
1434 | *) | |
1435 | echo >&AS_MESSAGE_LOG_FD "\ | |
fd5e21c7 RM |
1436 | $libc_seen_a$libc_seen_b from: |
1437 | $ac_try" | |
a0da5fe1 UD |
1438 | ;; |
1439 | esac | |
fd5e21c7 | 1440 | fi |
a0da5fe1 UD |
1441 | rm -f conftest*]) |
1442 | use_default_link=$libc_cv_use_default_link | |
fd26970f | 1443 | fi |
49803108 | 1444 | |
89569c8b L |
1445 | AC_CACHE_CHECK(for GLOB_DAT reloc, |
1446 | libc_cv_has_glob_dat, [dnl | |
1447 | cat > conftest.c <<EOF | |
1448 | extern int mumble; | |
1449 | int foo (void) { return mumble; } | |
1450 | EOF | |
1451 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS | |
1452 | -fPIC -shared -o conftest.so conftest.c | |
66a704c4 | 1453 | -nostdlib -nostartfiles $no_ssp |
89569c8b L |
1454 | 1>&AS_MESSAGE_LOG_FD]) |
1455 | then | |
1456 | dnl look for GLOB_DAT relocation. | |
1457 | if $READELF -rW conftest.so | grep '_GLOB_DAT' > /dev/null; then | |
1458 | libc_cv_has_glob_dat=yes | |
1459 | else | |
1460 | libc_cv_has_glob_dat=no | |
1461 | fi | |
1462 | else | |
1463 | libc_cv_has_glob_dat=no | |
1464 | fi | |
1465 | rm -f conftest*]) | |
1466 | AC_SUBST(libc_cv_has_glob_dat) | |
1467 | ||
5c550700 RM |
1468 | AC_CACHE_CHECK(linker output format, libc_cv_output_format, [dnl |
1469 | if libc_cv_output_format=` | |
66a704c4 | 1470 | ${CC-cc} -nostartfiles -nostdlib $no_ssp -Wl,--print-output-format 2>&AS_MESSAGE_LOG_FD` |
5c550700 RM |
1471 | then |
1472 | : | |
1473 | else | |
1474 | libc_cv_output_format= | |
1475 | fi | |
1476 | test -n "$libc_cv_output_format" || libc_cv_output_format=unknown]) | |
1477 | AC_SUBST(libc_cv_output_format) | |
1478 | ||
22dca1ea | 1479 | AC_CACHE_CHECK(for -fno-toplevel-reorder -fno-section-anchors, libc_cv_fno_toplevel_reorder, [dnl |
49803108 AJ |
1480 | cat > conftest.c <<EOF |
1481 | int foo; | |
1482 | EOF | |
22dca1ea | 1483 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fno-toplevel-reorder -fno-section-anchors |
49803108 AJ |
1484 | conftest.c 1>&AS_MESSAGE_LOG_FD]) |
1485 | then | |
18e2ac6d | 1486 | libc_cv_fno_toplevel_reorder=yes |
49803108 | 1487 | else |
18e2ac6d | 1488 | libc_cv_fno_toplevel_reorder=no |
49803108 AJ |
1489 | fi |
1490 | rm -f conftest*]) | |
18e2ac6d | 1491 | if test $libc_cv_fno_toplevel_reorder = yes; then |
22dca1ea | 1492 | fno_unit_at_a_time="-fno-toplevel-reorder -fno-section-anchors" |
18e2ac6d | 1493 | else |
49803108 AJ |
1494 | fno_unit_at_a_time=-fno-unit-at-a-time |
1495 | fi | |
1496 | AC_SUBST(fno_unit_at_a_time) | |
fd26970f | 1497 | |
61655555 L |
1498 | AC_CACHE_CHECK([for -mtls-dialect=gnu2], libc_cv_mtls_dialect_gnu2, |
1499 | [dnl | |
1500 | cat > conftest.c <<EOF | |
1501 | __thread int i; | |
1502 | void foo (void) | |
1503 | { | |
1504 | i = 10; | |
1505 | } | |
1506 | EOF | |
1507 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -S -fPIC -mtls-dialect=gnu2 | |
1508 | conftest.c 1>&AS_MESSAGE_LOG_FD]) | |
1509 | then | |
1510 | libc_cv_mtls_dialect_gnu2=yes | |
1511 | else | |
1512 | libc_cv_mtls_dialect_gnu2=no | |
1513 | fi | |
1514 | rm -f conftest*]) | |
1515 | AC_SUBST(libc_cv_mtls_dialect_gnu2) | |
1516 | LIBC_CONFIG_VAR([have-mtls-dialect-gnu2], [$libc_cv_mtls_dialect_gnu2]) | |
1517 | ||
a0da5fe1 UD |
1518 | AC_CACHE_CHECK(whether cc puts quotes around section names, |
1519 | libc_cv_have_section_quotes, | |
1520 | [cat > conftest.c <<EOF | |
1521 | static const int foo | |
1522 | __attribute__ ((section ("bar"))) = 1; | |
e26dd47f | 1523 | EOF |
a0da5fe1 UD |
1524 | if ${CC-cc} -S conftest.c -o conftest.s; then |
1525 | if grep '\.section.*"bar"' conftest.s >/dev/null; then | |
1526 | libc_cv_have_section_quotes=yes | |
e26dd47f | 1527 | else |
a0da5fe1 | 1528 | libc_cv_have_section_quotes=no |
e26dd47f | 1529 | fi |
a0da5fe1 UD |
1530 | else |
1531 | libc_cv_have_section_quotes=unknown | |
1532 | fi | |
1533 | rm -f conftest.{c,s} | |
1534 | ]) | |
1535 | if test $libc_cv_have_section_quotes = yes; then | |
1536 | AC_DEFINE(HAVE_SECTION_QUOTES) | |
9a97d1f7 UD |
1537 | fi |
1538 | ||
d555194c UD |
1539 | AC_CACHE_CHECK(for __builtin_memset, libc_cv_gcc_builtin_memset, [dnl |
1540 | cat > conftest.c <<\EOF | |
1541 | void zero (void *x) | |
1542 | { | |
a52d1562 | 1543 | __builtin_memset (x, 0, 1000); |
d555194c UD |
1544 | } |
1545 | EOF | |
1546 | dnl | |
e37fc4aa | 1547 | if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | grep -F "memset" > /dev/null]); |
d555194c UD |
1548 | then |
1549 | libc_cv_gcc_builtin_memset=no | |
1550 | else | |
1551 | libc_cv_gcc_builtin_memset=yes | |
1552 | fi | |
1553 | rm -f conftest* ]) | |
1554 | if test "$libc_cv_gcc_builtin_memset" = yes ; then | |
1555 | AC_DEFINE(HAVE_BUILTIN_MEMSET) | |
1556 | fi | |
1557 | ||
85dd1003 UD |
1558 | AC_CACHE_CHECK(for redirection of built-in functions, libc_cv_gcc_builtin_redirection, [dnl |
1559 | cat > conftest.c <<\EOF | |
1560 | extern char *strstr (const char *, const char *) __asm ("my_strstr"); | |
1561 | char *foo (const char *a, const char *b) | |
1562 | { | |
1563 | return __builtin_strstr (a, b); | |
1564 | } | |
1565 | EOF | |
1566 | dnl | |
e37fc4aa | 1567 | if AC_TRY_COMMAND([${CC-cc} -O3 -S conftest.c -o - | grep -F "my_strstr" > /dev/null]); |
85dd1003 UD |
1568 | then |
1569 | libc_cv_gcc_builtin_redirection=yes | |
1570 | else | |
1571 | libc_cv_gcc_builtin_redirection=no | |
1572 | fi | |
1573 | rm -f conftest* ]) | |
3ce1f295 UD |
1574 | if test "$libc_cv_gcc_builtin_redirection" = no; then |
1575 | AC_MSG_ERROR([support for the symbol redirection needed]) | |
85dd1003 UD |
1576 | fi |
1577 | ||
7998fa78 AS |
1578 | dnl Determine how to disable generation of FMA instructions. |
1579 | AC_CACHE_CHECK([for compiler option to disable generation of FMA instructions], | |
1580 | libc_cv_cc_nofma, [dnl | |
1581 | libc_cv_cc_nofma= | |
1582 | for opt in -ffp-contract=off -mno-fused-madd; do | |
1583 | LIBC_TRY_CC_OPTION([$opt], [libc_cv_cc_nofma=$opt; break]) | |
1584 | done]) | |
bef0b507 | 1585 | AC_SUBST(libc_cv_cc_nofma) |
7998fa78 | 1586 | |
2cf9ad57 RM |
1587 | if test -n "$submachine"; then |
1588 | AC_CACHE_CHECK([for compiler option for CPU variant], | |
f7d82dc9 | 1589 | libc_cv_cc_submachine, [dnl |
2cf9ad57 RM |
1590 | libc_cv_cc_submachine=no |
1591 | for opt in "-march=$submachine" "-mcpu=$submachine"; do | |
40b601fb | 1592 | LIBC_TRY_CC_OPTION([$opt], [ |
2cf9ad57 | 1593 | libc_cv_cc_submachine="$opt" |
40b601fb | 1594 | break], []) |
2cf9ad57 RM |
1595 | done]) |
1596 | if test "x$libc_cv_cc_submachine" = xno; then | |
1597 | AC_MSG_ERROR([${CC-cc} does not support $submachine]) | |
1598 | fi | |
1599 | fi | |
1600 | AC_SUBST(libc_cv_cc_submachine) | |
1601 | ||
85c2e611 AZ |
1602 | AC_CACHE_CHECK(if $CC accepts -fno-tree-loop-distribute-patterns with \ |
1603 | __attribute__ ((__optimize__)), libc_cv_cc_loop_to_function, [dnl | |
1604 | cat > conftest.c <<EOF | |
1605 | void | |
1606 | __attribute__ ((__optimize__ ("-fno-tree-loop-distribute-patterns"))) | |
1607 | foo (void) {} | |
1608 | EOF | |
1609 | libc_cv_cc_loop_to_function=no | |
1610 | if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS -c conftest.c]) | |
1611 | then | |
1612 | libc_cv_cc_loop_to_function=yes | |
1613 | fi | |
1614 | rm -f conftest*]) | |
1615 | if test $libc_cv_cc_loop_to_function = yes; then | |
1616 | AC_DEFINE(HAVE_CC_INHIBIT_LOOP_TO_LIBCALL) | |
1617 | fi | |
1618 | AC_SUBST(libc_cv_cc_loop_to_function) | |
1619 | ||
c8f3e6db UD |
1620 | dnl Check whether we have the gd library available. |
1621 | AC_MSG_CHECKING(for libgd) | |
6dab8688 UD |
1622 | if test "$with_gd" != "no"; then |
1623 | old_CFLAGS="$CFLAGS" | |
1624 | CFLAGS="$CFLAGS $libgd_include" | |
1625 | old_LDFLAGS="$LDFLAGS" | |
1626 | LDFLAGS="$LDFLAGS $libgd_ldflags" | |
1627 | old_LIBS="$LIBS" | |
1628 | LIBS="$LIBS -lgd -lpng -lz -lm" | |
1629 | AC_TRY_LINK([#include <gd.h>], [gdImagePng (0, 0)], LIBGD=yes, LIBGD=no) | |
1630 | CFLAGS="$old_CFLAGS" | |
1631 | LDFLAGS="$old_LDFLAGS" | |
1632 | LIBS="$old_LIBS" | |
1633 | else | |
1634 | LIBGD=no | |
1635 | fi | |
c8f3e6db UD |
1636 | AC_MSG_RESULT($LIBGD) |
1637 | AC_SUBST(LIBGD) | |
3d558f4e | 1638 | |
2fff3d93 UD |
1639 | # SELinux detection |
1640 | if test x$with_selinux = xno ; then | |
1641 | have_selinux=no; | |
1642 | else | |
1643 | # See if we have the SELinux library | |
1644 | AC_CHECK_LIB(selinux, is_selinux_enabled, | |
1645 | have_selinux=yes, have_selinux=no) | |
49155d51 | 1646 | if test x$with_selinux = xyes ; then |
2fff3d93 | 1647 | if test x$have_selinux = xno ; then |
0699f766 | 1648 | AC_MSG_ERROR([SELinux explicitly required, but SELinux library not found]) |
2fff3d93 UD |
1649 | fi |
1650 | fi | |
1651 | fi | |
1652 | # Check if we're building with SELinux support. | |
1653 | if test "x$have_selinux" = xyes; then | |
943db9eb | 1654 | AC_DEFINE(HAVE_SELINUX, 1, [SELinux support]) |
ec23b9be UD |
1655 | |
1656 | # See if we have the libaudit library | |
943db9eb | 1657 | AC_CHECK_LIB(audit, audit_log_user_avc_message, |
77e8bddf | 1658 | have_libaudit=yes, have_libaudit=no) |
ec23b9be | 1659 | if test "x$have_libaudit" = xyes; then |
943db9eb | 1660 | AC_DEFINE(HAVE_LIBAUDIT, 1, [SELinux libaudit support]) |
ec23b9be UD |
1661 | fi |
1662 | AC_SUBST(have_libaudit) | |
1f063dca UD |
1663 | |
1664 | # See if we have the libcap library | |
1665 | AC_CHECK_LIB(cap, cap_init, have_libcap=yes, have_libcap=no) | |
1666 | if test "x$have_libcap" = xyes; then | |
1667 | AC_DEFINE(HAVE_LIBCAP, 1, [SELinux libcap support]) | |
1668 | fi | |
1669 | AC_SUBST(have_libcap) | |
2fff3d93 UD |
1670 | fi |
1671 | AC_SUBST(have_selinux) | |
1672 | ||
61653dfb RM |
1673 | CPPUNDEFS= |
1674 | dnl Check for silly hacked compilers predefining _FORTIFY_SOURCE. | |
1675 | dnl Since we are building the implementations of the fortified functions here, | |
1676 | dnl having the macro defined interacts very badly. | |
1677 | AC_CACHE_CHECK([for _FORTIFY_SOURCE predefine], libc_cv_predef_fortify_source, | |
1678 | [AC_TRY_COMPILE([], [ | |
1679 | #ifdef _FORTIFY_SOURCE | |
1680 | # error bogon | |
1681 | #endif], | |
1682 | [libc_cv_predef_fortify_source=no], | |
1683 | [libc_cv_predef_fortify_source=yes])]) | |
1684 | if test $libc_cv_predef_fortify_source = yes; then | |
1685 | CPPUNDEFS="${CPPUNDEFS:+$CPPUNDEFS }-U_FORTIFY_SOURCE" | |
1686 | fi | |
1687 | AC_SUBST(CPPUNDEFS) | |
1688 | ||
61b1ef6e MF |
1689 | # Some linkers on some architectures support __ehdr_start but with |
1690 | # bugs. Make sure usage of it does not create relocations in the | |
1691 | # output (as the linker should resolve them all for us). | |
1692 | AC_CACHE_CHECK([whether the linker provides working __ehdr_start], | |
44c4e5d5 RM |
1693 | libc_cv_ehdr_start, [ |
1694 | old_CFLAGS="$CFLAGS" | |
1695 | old_LDFLAGS="$LDFLAGS" | |
1696 | old_LIBS="$LIBS" | |
1697 | CFLAGS="$CFLAGS -fPIC" | |
66a704c4 | 1698 | LDFLAGS="$LDFLAGS -nostdlib -nostartfiles -shared $no_ssp" |
44c4e5d5 RM |
1699 | LIBS= |
1700 | AC_LINK_IFELSE([AC_LANG_SOURCE([ | |
61b1ef6e MF |
1701 | typedef struct { |
1702 | char foo; | |
1703 | long val; | |
1704 | } Ehdr; | |
1705 | extern const Ehdr __ehdr_start __attribute__ ((visibility ("hidden"))); | |
1706 | long ehdr (void) { return __ehdr_start.val; } | |
44c4e5d5 | 1707 | ])], |
e37fc4aa | 1708 | [if $READELF -r conftest | grep -F __ehdr_start >/dev/null; then |
61b1ef6e MF |
1709 | libc_cv_ehdr_start=broken |
1710 | else | |
1711 | libc_cv_ehdr_start=yes | |
1712 | fi], [libc_cv_ehdr_start=no]) | |
44c4e5d5 RM |
1713 | CFLAGS="$old_CFLAGS" |
1714 | LDFLAGS="$old_LDFLAGS" | |
1715 | LIBS="$old_LIBS" | |
1716 | ]) | |
61b1ef6e | 1717 | if test "$libc_cv_ehdr_start" = yes; then |
44c4e5d5 | 1718 | AC_DEFINE([HAVE_EHDR_START]) |
61b1ef6e MF |
1719 | elif test "$libc_cv_ehdr_start" = broken; then |
1720 | AC_MSG_WARN([linker is broken -- you should upgrade]) | |
9fe7e787 RM |
1721 | fi |
1722 | ||
1723 | AC_CACHE_CHECK(for __builtin_trap with no external dependencies, | |
1724 | libc_cv_builtin_trap, [dnl | |
1725 | libc_cv_builtin_trap=no | |
1726 | AC_TRY_COMPILE([], [__builtin_trap ()], [ | |
1727 | libc_undefs=`$NM -u conftest.o | | |
1728 | LC_ALL=C $AWK '$1 == "U" { print $2 | "sort -u"; next } { exit(1) }' \ | |
1729 | 2>&AS_MESSAGE_LOG_FD` || { | |
1730 | AC_MSG_ERROR([confusing output from $NM -u]) | |
1731 | } | |
1732 | echo >&AS_MESSAGE_LOG_FD "libc_undefs='$libc_undefs'" | |
1733 | if test -z "$libc_undefs"; then | |
1734 | libc_cv_builtin_trap=yes | |
1735 | fi])]) | |
1736 | if test $libc_cv_builtin_trap = yes; then | |
1737 | AC_DEFINE([HAVE_BUILTIN_TRAP]) | |
44c4e5d5 RM |
1738 | fi |
1739 | ||
99e1dc0a FW |
1740 | dnl C++ feature tests. |
1741 | AC_LANG_PUSH([C++]) | |
1742 | ||
1743 | AC_CACHE_CHECK([whether the C++ compiler supports thread_local], | |
1744 | libc_cv_cxx_thread_local, [ | |
1745 | old_CXXFLAGS="$CXXFLAGS" | |
1746 | CXXFLAGS="$CXXFLAGS -std=gnu++11" | |
1747 | AC_COMPILE_IFELSE([AC_LANG_SOURCE([ | |
1748 | #include <thread> | |
1749 | ||
1750 | // Compiler support. | |
1751 | struct S | |
1752 | { | |
1753 | S (); | |
1754 | ~S (); | |
1755 | }; | |
1756 | thread_local S s; | |
1757 | S * get () { return &s; } | |
1758 | ||
1759 | // libstdc++ support. | |
1760 | #ifndef _GLIBCXX_HAVE___CXA_THREAD_ATEXIT_IMPL | |
1761 | #error __cxa_thread_atexit_impl not supported | |
1762 | #endif | |
1763 | ])], | |
1764 | [libc_cv_cxx_thread_local=yes], | |
1765 | [libc_cv_cxx_thread_local=no]) | |
1766 | CXXFLAGS="$old_CXXFLAGS" | |
1767 | ]) | |
1768 | AC_SUBST(libc_cv_cxx_thread_local) | |
1769 | ||
1770 | AC_LANG_POP([C++]) | |
1771 | dnl End of C++ feature tests. | |
1772 | ||
c224a18a RM |
1773 | ### End of automated tests. |
1774 | ### Now run sysdeps configure fragments. | |
1775 | ||
cb343854 | 1776 | # They also can set these variables. |
591e1ffb | 1777 | use_ldconfig=no |
cb343854 | 1778 | ldd_rewrite_script=no |
77259608 | 1779 | libc_cv_sysconfdir=$sysconfdir |
4248b1b1 | 1780 | libc_cv_localstatedir=$localstatedir |
74bd2300 | 1781 | libc_cv_gcc_unwind_find_fde=no |
e2fd3cbe | 1782 | libc_cv_idn=no |
cb343854 | 1783 | |
28f540f4 | 1784 | # Iterate over all the sysdep directories we will use, running their |
09055553 | 1785 | # configure fragments. |
28f540f4 | 1786 | for dir in $sysnames; do |
57ba7bb4 UD |
1787 | case $dir in |
1788 | /*) dest=$dir ;; | |
1789 | *) dest=$srcdir/$dir ;; | |
1790 | esac | |
1791 | if test -r $dest/configure; then | |
d1149385 | 1792 | AC_MSG_RESULT(running configure fragment for $dir) |
57ba7bb4 | 1793 | . $dest/configure |
28f540f4 | 1794 | fi |
28f540f4 RM |
1795 | done |
1796 | ||
5695d46f AS |
1797 | if test x"$build_mathvec" = xnotset; then |
1798 | build_mathvec=no | |
1799 | fi | |
1800 | LIBC_CONFIG_VAR([build-mathvec], [$build_mathvec]) | |
1801 | ||
7ffa9423 AZ |
1802 | AC_SUBST(libc_extra_cflags) |
1803 | AC_SUBST(libc_extra_cppflags) | |
1804 | ||
74bd2300 UD |
1805 | if test x$libc_cv_gcc_unwind_find_fde = xyes; then |
1806 | AC_DEFINE(EXPORT_UNWIND_FIND_FDE) | |
1807 | fi | |
1808 | AC_SUBST(libc_cv_gcc_unwind_find_fde) | |
1809 | ||
6e6249d0 RM |
1810 | # A sysdeps configure fragment can reset this if IFUNC is not actually |
1811 | # usable even though the assembler knows how to generate the symbol type. | |
1812 | if test x"$libc_cv_ld_gnu_indirect_function" = xyes; then | |
1813 | AC_DEFINE(HAVE_IFUNC) | |
1814 | fi | |
92ad88fe | 1815 | LIBC_CONFIG_VAR([have-ifunc], [$libc_cv_ld_gnu_indirect_function]) |
6e6249d0 | 1816 | |
022dfdce SL |
1817 | if test x"$libc_cv_gcc_indirect_function" = xyes; then |
1818 | AC_DEFINE(HAVE_GCC_IFUNC) | |
1819 | fi | |
1820 | ||
3cc3ef96 RM |
1821 | # This is far from the AC_ARG_ENABLE that sets it so that a sysdeps |
1822 | # configure fragment can override the value to prevent this AC_DEFINE. | |
1823 | AC_SUBST(use_nscd) | |
1824 | if test "x$use_nscd" != xno; then | |
1825 | AC_DEFINE([USE_NSCD]) | |
1826 | fi | |
c53d909c RM |
1827 | if test "x$build_nscd" = xdefault; then |
1828 | build_nscd=$use_nscd | |
1829 | fi | |
3cc3ef96 | 1830 | |
84384f5b | 1831 | AC_SUBST(libc_cv_slibdir) |
aaa8cb4b | 1832 | AC_SUBST(libc_cv_rtlddir) |
90fe682d | 1833 | AC_SUBST(libc_cv_complocaledir) |
77259608 | 1834 | AC_SUBST(libc_cv_sysconfdir) |
4248b1b1 | 1835 | AC_SUBST(libc_cv_localstatedir) |
1ef32c3d UD |
1836 | AC_SUBST(libc_cv_rootsbindir) |
1837 | ||
f57f8055 RM |
1838 | if test x$use_ldconfig = xyes; then |
1839 | AC_DEFINE(USE_LDCONFIG) | |
1840 | fi | |
591e1ffb | 1841 | AC_SUBST(use_ldconfig) |
cb343854 | 1842 | AC_SUBST(ldd_rewrite_script) |
84384f5b | 1843 | |
650425ce | 1844 | AC_SUBST(static) |
ff3d7ed3 | 1845 | AC_SUBST(shared) |
a334319f | 1846 | |
ff886b82 UD |
1847 | AC_CACHE_CHECK([whether -fPIC is default], libc_cv_pic_default, |
1848 | [libc_cv_pic_default=yes | |
cc3fa755 | 1849 | cat > conftest.c <<EOF |
9756dfe1 | 1850 | #if defined __PIC__ || defined __pic__ || defined PIC || defined pic |
cc3fa755 UD |
1851 | # error PIC is default. |
1852 | #endif | |
1853 | EOF | |
0b4ee387 | 1854 | if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then |
ff886b82 | 1855 | libc_cv_pic_default=no |
cc3fa755 UD |
1856 | fi |
1857 | rm -f conftest.*]) | |
ff886b82 | 1858 | AC_SUBST(libc_cv_pic_default) |
cc3fa755 | 1859 | |
00c714df L |
1860 | AC_CACHE_CHECK([whether -fPIE is default], libc_cv_cc_pie_default, |
1861 | [libc_cv_cc_pie_default=yes | |
cc08749b L |
1862 | cat > conftest.c <<EOF |
1863 | #if defined __PIE__ || defined __pie__ || defined PIE || defined pie | |
1864 | # error PIE is default. | |
1865 | #endif | |
1866 | EOF | |
1867 | if eval "${CC-cc} -S conftest.c 2>&AS_MESSAGE_LOG_FD 1>&AS_MESSAGE_LOG_FD"; then | |
00c714df | 1868 | libc_cv_cc_pie_default=no |
cc08749b L |
1869 | fi |
1870 | rm -f conftest.*]) | |
00c714df L |
1871 | libc_cv_pie_default=$libc_cv_cc_pie_default |
1872 | AC_SUBST(libc_cv_cc_pie_default) | |
cc08749b L |
1873 | AC_SUBST(libc_cv_pie_default) |
1874 | ||
abcb584d L |
1875 | # Set the `multidir' variable by grabbing the variable from the compiler. |
1876 | # We do it once and save the result in a generated makefile. | |
1877 | libc_cv_multidir=`${CC-cc} $CFLAGS $CPPFLAGS -print-multi-directory` | |
1878 | AC_SUBST(libc_cv_multidir) | |
1879 | ||
9d7a3741 L |
1880 | if test "$static_pie" = yes; then |
1881 | # The linker must support --no-dynamic-linker. | |
1882 | if test "$libc_cv_no_dynamic_linker" != yes; then | |
1883 | AC_MSG_ERROR([linker support for --no-dynamic-linker needed]) | |
1884 | fi | |
1885 | # Default to PIE. | |
1886 | libc_cv_pie_default=yes | |
1887 | AC_DEFINE(ENABLE_STATIC_PIE) | |
1888 | fi | |
1889 | LIBC_CONFIG_VAR([enable-static-pie], [$static_pie]) | |
1890 | ||
ff3d7ed3 | 1891 | AC_SUBST(profile) |
5107cf1d | 1892 | AC_SUBST(static_nss) |
ff3d7ed3 | 1893 | |
edf5b2d7 UD |
1894 | AC_SUBST(DEFINES) |
1895 | ||
cb8a6dbd | 1896 | dnl See sysdeps/mach/configure.ac for this variable. |
61c83c3f RM |
1897 | AC_SUBST(mach_interface_list) |
1898 | ||
ee74a442 UD |
1899 | VERSION=`sed -n -e 's/^#define VERSION "\([^"]*\)"/\1/p' < $srcdir/version.h` |
1900 | RELEASE=`sed -n -e 's/^#define RELEASE "\([^"]*\)"/\1/p' < $srcdir/version.h` | |
df4ef2ab | 1901 | AC_SUBST(VERSION) |
ee74a442 | 1902 | AC_SUBST(RELEASE) |
df4ef2ab | 1903 | |
728e272a | 1904 | AC_CONFIG_FILES([config.make Makefile]) |
c118d634 | 1905 | AC_CONFIG_COMMANDS([default],[[ |
737547be UD |
1906 | case $CONFIG_FILES in *config.make*) |
1907 | echo "$config_vars" >> config.make;; | |
1908 | esac | |
c118d634 RM |
1909 | test -d bits || mkdir bits]],[[config_vars='$config_vars']]) |
1910 | AC_OUTPUT |