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7adcbafe | 1 | dnl Copyright (C) 2005-2022 Free Software Foundation, Inc. |
ad41bd84 JM |
2 | dnl |
3 | dnl This file is part of GCC. | |
4 | dnl | |
5 | dnl GCC is free software; you can redistribute it and/or modify | |
6 | dnl it under the terms of the GNU General Public License as published by | |
7 | dnl the Free Software Foundation; either version 3, or (at your option) | |
8 | dnl any later version. | |
9 | dnl | |
10 | dnl GCC is distributed in the hope that it will be useful, | |
11 | dnl but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | dnl GNU General Public License for more details. | |
14 | dnl | |
15 | dnl You should have received a copy of the GNU General Public License | |
16 | dnl along with GCC; see the file COPYING3. If not see | |
17 | dnl <http://www.gnu.org/licenses/>. | |
18 | ||
67da1534 KC |
19 | dnl See whether we need a declaration for a function. |
20 | dnl The result is highly dependent on the INCLUDES passed in, so make sure | |
21 | dnl to use a different cache variable name in this macro if it is invoked | |
22 | dnl in a different context somewhere else. | |
23 | dnl gcc_AC_CHECK_DECL(SYMBOL, | |
24 | dnl [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND [, INCLUDES]]]) | |
25 | AC_DEFUN([gcc_AC_CHECK_DECL], | |
26 | [AC_MSG_CHECKING([whether $1 is declared]) | |
27 | AC_CACHE_VAL(gcc_cv_have_decl_$1, | |
28 | [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([$4], | |
29 | [#ifndef $1 | |
30 | char *(*pfn) = (char *(*)) $1 ; | |
31 | #endif])], eval "gcc_cv_have_decl_$1=yes", eval "gcc_cv_have_decl_$1=no")]) | |
32 | if eval "test \"`echo '$gcc_cv_have_decl_'$1`\" = yes"; then | |
33 | AC_MSG_RESULT(yes) ; ifelse([$2], , :, [$2]) | |
34 | else | |
35 | AC_MSG_RESULT(no) ; ifelse([$3], , :, [$3]) | |
36 | fi | |
37 | ])dnl | |
38 | ||
39 | dnl Check multiple functions to see whether each needs a declaration. | |
40 | dnl Arrange to define HAVE_DECL_<FUNCTION> to 0 or 1 as appropriate. | |
41 | dnl gcc_AC_CHECK_DECLS(SYMBOLS, | |
42 | dnl [ACTION-IF-NEEDED [, ACTION-IF-NOT-NEEDED [, INCLUDES]]]) | |
43 | AC_DEFUN([gcc_AC_CHECK_DECLS], | |
44 | [AC_FOREACH([gcc_AC_Func], [$1], | |
45 | [AH_TEMPLATE(AS_TR_CPP(HAVE_DECL_[]gcc_AC_Func), | |
46 | [Define to 1 if we found a declaration for ']gcc_AC_Func[', otherwise | |
47 | define to 0.])])dnl | |
48 | for ac_func in $1 | |
49 | do | |
50 | ac_tr_decl=AS_TR_CPP([HAVE_DECL_$ac_func]) | |
51 | gcc_AC_CHECK_DECL($ac_func, | |
52 | [AC_DEFINE_UNQUOTED($ac_tr_decl, 1) $2], | |
53 | [AC_DEFINE_UNQUOTED($ac_tr_decl, 0) $3], | |
54 | dnl It is possible that the include files passed in here are local headers | |
55 | dnl which supply a backup declaration for the relevant prototype based on | |
56 | dnl the definition of (or lack of) the HAVE_DECL_ macro. If so, this test | |
57 | dnl will always return success. E.g. see libiberty.h's handling of | |
58 | dnl `basename'. To avoid this, we define the relevant HAVE_DECL_ macro to | |
59 | dnl 1 so that any local headers used do not provide their own prototype | |
60 | dnl during this test. | |
61 | #undef $ac_tr_decl | |
62 | #define $ac_tr_decl 1 | |
63 | $4 | |
64 | ) | |
65 | done | |
66 | ]) | |
67 | ||
68 | dnl 'make compare' can be significantly faster, if cmp itself can | |
69 | dnl skip bytes instead of using tail. The test being performed is | |
70 | dnl "if cmp --ignore-initial=2 t1 t2 && ! cmp --ignore-initial=1 t1 t2" | |
71 | dnl but we need to sink errors and handle broken shells. We also test | |
72 | dnl for the parameter format "cmp file1 file2 skip1 skip2" which is | |
73 | dnl accepted by cmp on some systems. | |
74 | AC_DEFUN([gcc_AC_PROG_CMP_IGNORE_INITIAL], | |
75 | [AC_CACHE_CHECK([for cmp's capabilities], gcc_cv_prog_cmp_skip, | |
76 | [ echo abfoo >t1 | |
77 | echo cdfoo >t2 | |
78 | gcc_cv_prog_cmp_skip=slowcompare | |
79 | if cmp --ignore-initial=2 t1 t2 > /dev/null 2>&1; then | |
80 | if cmp --ignore-initial=1 t1 t2 > /dev/null 2>&1; then | |
81 | : | |
82 | else | |
83 | gcc_cv_prog_cmp_skip=gnucompare | |
84 | fi | |
85 | fi | |
86 | if test $gcc_cv_prog_cmp_skip = slowcompare ; then | |
87 | if cmp t1 t2 2 2 > /dev/null 2>&1; then | |
88 | if cmp t1 t2 1 1 > /dev/null 2>&1; then | |
89 | : | |
90 | else | |
91 | gcc_cv_prog_cmp_skip=fastcompare | |
92 | fi | |
93 | fi | |
94 | fi | |
95 | rm t1 t2 | |
96 | ]) | |
97 | make_compare_target=$gcc_cv_prog_cmp_skip | |
98 | AC_SUBST(make_compare_target) | |
99 | ]) | |
100 | ||
101 | dnl See if symbolic links work and if not, try to substitute either hard links or simple copy. | |
102 | AC_DEFUN([gcc_AC_PROG_LN_S], | |
103 | [AC_MSG_CHECKING(whether ln -s works) | |
104 | AC_CACHE_VAL(gcc_cv_prog_LN_S, | |
105 | [rm -f conftestdata_t | |
106 | echo >conftestdata_f | |
107 | if ln -s conftestdata_f conftestdata_t 2>/dev/null | |
108 | then | |
109 | gcc_cv_prog_LN_S="ln -s" | |
110 | else | |
111 | if ln conftestdata_f conftestdata_t 2>/dev/null | |
112 | then | |
113 | gcc_cv_prog_LN_S=ln | |
114 | else | |
115 | if cp -p conftestdata_f conftestdata_t 2>/dev/null | |
116 | then | |
117 | gcc_cv_prog_LN_S="cp -p" | |
118 | else | |
119 | gcc_cv_prog_LN_S=cp | |
120 | fi | |
121 | fi | |
122 | fi | |
123 | rm -f conftestdata_f conftestdata_t | |
124 | ])dnl | |
125 | LN_S="$gcc_cv_prog_LN_S" | |
126 | if test "$gcc_cv_prog_LN_S" = "ln -s"; then | |
127 | AC_MSG_RESULT(yes) | |
128 | else | |
129 | if test "$gcc_cv_prog_LN_S" = "ln"; then | |
130 | AC_MSG_RESULT([no, using ln]) | |
131 | else | |
132 | AC_MSG_RESULT([no, and neither does ln, so using $gcc_cv_prog_LN_S]) | |
133 | fi | |
134 | fi | |
135 | AC_SUBST(LN_S)dnl | |
136 | ]) | |
137 | ||
138 | dnl Define MKDIR_TAKES_ONE_ARG if mkdir accepts only one argument instead | |
139 | dnl of the usual 2. | |
140 | AC_DEFUN([gcc_AC_FUNC_MKDIR_TAKES_ONE_ARG], | |
141 | [AC_CACHE_CHECK([if mkdir takes one argument], gcc_cv_mkdir_takes_one_arg, | |
142 | [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([ | |
143 | #include <sys/types.h> | |
144 | #ifdef HAVE_SYS_STAT_H | |
145 | # include <sys/stat.h> | |
146 | #endif | |
147 | #ifdef HAVE_UNISTD_H | |
148 | # include <unistd.h> | |
149 | #endif | |
150 | #ifdef HAVE_DIRECT_H | |
151 | # include <direct.h> | |
152 | #endif], [mkdir ("foo", 0);])], | |
153 | gcc_cv_mkdir_takes_one_arg=no, gcc_cv_mkdir_takes_one_arg=yes)]) | |
154 | if test $gcc_cv_mkdir_takes_one_arg = yes ; then | |
155 | AC_DEFINE(MKDIR_TAKES_ONE_ARG, 1, [Define if host mkdir takes a single argument.]) | |
156 | fi | |
157 | ]) | |
158 | ||
159 | AC_DEFUN([gcc_AC_PROG_INSTALL], | |
160 | [AC_REQUIRE([AC_CONFIG_AUX_DIR_DEFAULT])dnl | |
161 | # Find a good install program. We prefer a C program (faster), | |
162 | # so one script is as good as another. But avoid the broken or | |
163 | # incompatible versions: | |
164 | # SysV /etc/install, /usr/sbin/install | |
165 | # SunOS /usr/etc/install | |
166 | # IRIX /sbin/install | |
167 | # AIX /bin/install | |
168 | # AFS /usr/afsws/bin/install, which mishandles nonexistent args | |
169 | # SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff" | |
170 | # ./install, which can be erroneously created by make from ./install.sh. | |
171 | AC_MSG_CHECKING(for a BSD compatible install) | |
172 | if test -z "$INSTALL"; then | |
173 | AC_CACHE_VAL(ac_cv_path_install, | |
174 | [ IFS="${IFS= }"; ac_save_IFS="$IFS"; IFS="${IFS}:" | |
175 | for ac_dir in $PATH; do | |
176 | # Account for people who put trailing slashes in PATH elements. | |
177 | case "$ac_dir/" in | |
178 | /|./|.//|/etc/*|/usr/sbin/*|/usr/etc/*|/sbin/*|/usr/afsws/bin/*|/usr/ucb/*) ;; | |
179 | *) | |
180 | # OSF1 and SCO ODT 3.0 have their own names for install. | |
181 | for ac_prog in ginstall scoinst install; do | |
182 | if test -f $ac_dir/$ac_prog; then | |
183 | if test $ac_prog = install && | |
184 | grep dspmsg $ac_dir/$ac_prog >/dev/null 2>&1; then | |
185 | # AIX install. It has an incompatible calling convention. | |
186 | # OSF/1 installbsd also uses dspmsg, but is usable. | |
187 | : | |
188 | else | |
189 | ac_cv_path_install="$ac_dir/$ac_prog -c" | |
190 | break 2 | |
191 | fi | |
192 | fi | |
193 | done | |
194 | ;; | |
195 | esac | |
196 | done | |
197 | IFS="$ac_save_IFS" | |
198 | ])dnl | |
199 | if test "${ac_cv_path_install+set}" = set; then | |
200 | INSTALL="$ac_cv_path_install" | |
201 | else | |
202 | # As a last resort, use the slow shell script. We don't cache a | |
203 | # path for INSTALL within a source directory, because that will | |
204 | # break other packages using the cache if that directory is | |
205 | # removed, or if the path is relative. | |
206 | INSTALL="$ac_install_sh" | |
207 | fi | |
208 | fi | |
209 | dnl We do special magic for INSTALL instead of AC_SUBST, to get | |
210 | dnl relative paths right. | |
211 | AC_MSG_RESULT($INSTALL) | |
212 | AC_SUBST(INSTALL)dnl | |
213 | ||
214 | # Use test -z because SunOS4 sh mishandles braces in ${var-val}. | |
215 | # It thinks the first close brace ends the variable substitution. | |
216 | test -z "$INSTALL_PROGRAM" && INSTALL_PROGRAM='${INSTALL}' | |
217 | AC_SUBST(INSTALL_PROGRAM)dnl | |
218 | ||
219 | test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644' | |
220 | AC_SUBST(INSTALL_DATA)dnl | |
221 | ]) | |
222 | ||
67da1534 KC |
223 | dnl Determine if enumerated bitfields are unsigned. ISO C says they can |
224 | dnl be either signed or unsigned. | |
225 | dnl | |
226 | AC_DEFUN([gcc_AC_C_ENUM_BF_UNSIGNED], | |
227 | [AC_CACHE_CHECK(for unsigned enumerated bitfields, gcc_cv_enum_bf_unsigned, | |
228 | [AC_RUN_IFELSE([AC_LANG_SOURCE([#include <stdlib.h> | |
229 | enum t { BLAH = 128 } ; | |
230 | struct s_t { enum t member : 8; } s ; | |
231 | int main(void) | |
232 | { | |
233 | s.member = BLAH; | |
234 | if (s.member < 0) exit(1); | |
235 | exit(0); | |
236 | ||
237 | }])], gcc_cv_enum_bf_unsigned=yes, gcc_cv_enum_bf_unsigned=no, gcc_cv_enum_bf_unsigned=yes)]) | |
238 | if test $gcc_cv_enum_bf_unsigned = yes; then | |
239 | AC_DEFINE(ENUM_BITFIELDS_ARE_UNSIGNED, 1, | |
240 | [Define if enumerated bitfields are treated as unsigned values.]) | |
241 | fi]) | |
242 | ||
243 | dnl Probe number of bits in a byte. | |
244 | dnl Note C89 requires CHAR_BIT >= 8. | |
245 | dnl | |
246 | AC_DEFUN([gcc_AC_C_CHAR_BIT], | |
247 | [AC_CACHE_CHECK(for CHAR_BIT, gcc_cv_decl_char_bit, | |
248 | [AC_EGREP_CPP(found, | |
249 | [#ifdef HAVE_LIMITS_H | |
250 | #include <limits.h> | |
251 | #endif | |
252 | #ifdef CHAR_BIT | |
253 | found | |
254 | #endif], gcc_cv_decl_char_bit=yes, gcc_cv_decl_char_bit=no) | |
255 | ]) | |
256 | if test $gcc_cv_decl_char_bit = no; then | |
257 | AC_CACHE_CHECK(number of bits in a byte, gcc_cv_c_nbby, | |
258 | [i=8 | |
259 | gcc_cv_c_nbby= | |
260 | while test $i -lt 65; do | |
261 | AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, | |
262 | [switch(0) { | |
263 | case (unsigned char)((unsigned long)1 << $i) == ((unsigned long)1 << $i): | |
264 | case (unsigned char)((unsigned long)1<<($i-1)) == ((unsigned long)1<<($i-1)): | |
265 | ; }])], | |
266 | [gcc_cv_c_nbby=$i; break]) | |
267 | i=`expr $i + 1` | |
268 | done | |
269 | test -z "$gcc_cv_c_nbby" && gcc_cv_c_nbby=failed | |
270 | ]) | |
271 | if test $gcc_cv_c_nbby = failed; then | |
272 | AC_MSG_ERROR(cannot determine number of bits in a byte) | |
273 | else | |
274 | AC_DEFINE_UNQUOTED(CHAR_BIT, $gcc_cv_c_nbby, | |
236ec2d7 | 275 | [Define as the number of bits in a byte, if `limits.h' doesn't.]) |
67da1534 KC |
276 | fi |
277 | fi]) | |
278 | ||
279 | AC_DEFUN([gcc_AC_INITFINI_ARRAY], | |
dea82cdb | 280 | [AC_ARG_ENABLE(initfini-array, |
67da1534 KC |
281 | [ --enable-initfini-array use .init_array/.fini_array sections], |
282 | [], [ | |
283 | AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support, | |
284 | gcc_cv_initfini_array, [dnl | |
0c587260 | 285 | if test "x${build}" = "x${target}" && test "x${build}" = "x${host}"; then |
e9c9f128 JJ |
286 | case "${target}" in |
287 | ia64-*) | |
288 | AC_RUN_IFELSE([AC_LANG_SOURCE([ | |
b0894e1f L |
289 | #ifndef __ELF__ |
290 | #error Not an ELF OS | |
291 | #endif | |
0c587260 L |
292 | /* We turn on .preinit_array/.init_array/.fini_array support for ia64 |
293 | if it can be used. */ | |
67da1534 KC |
294 | static int x = -1; |
295 | int main (void) { return x; } | |
296 | int foo (void) { x = 0; } | |
0c587260 | 297 | int (*fp) (void) __attribute__ ((section (".init_array"))) = foo; |
0c587260 | 298 | ])], |
67da1534 | 299 | [gcc_cv_initfini_array=yes], [gcc_cv_initfini_array=no], |
e9c9f128 JJ |
300 | [gcc_cv_initfini_array=no]);; |
301 | *) | |
302 | gcc_cv_initfini_array=no | |
303 | if test $in_tree_ld = yes ; then | |
304 | if test "$gcc_cv_gld_major_version" -eq 2 \ | |
305 | -a "$gcc_cv_gld_minor_version" -ge 22 \ | |
306 | -o "$gcc_cv_gld_major_version" -gt 2 \ | |
307 | && test $in_tree_ld_is_elf = yes; then | |
308 | gcc_cv_initfini_array=yes | |
309 | fi | |
310 | elif test x$gcc_cv_as != x -a x$gcc_cv_ld != x -a x$gcc_cv_objdump != x ; then | |
e6b6bf09 RO |
311 | case $target:$gas in |
312 | *:yes) | |
313 | sh_flags='"a"' | |
314 | sh_type='%progbits' | |
315 | ;; | |
316 | i?86-*-solaris2*:no | x86_64-*-solaris2*:no) | |
317 | sh_flags='"a"' | |
318 | sh_type='@progbits' | |
319 | ;; | |
320 | sparc*-*-solaris2*:no) | |
321 | sh_flags='#alloc' | |
322 | sh_type='#progbits' | |
323 | sh_quote='"' | |
324 | ;; | |
325 | esac | |
326 | case "$target:$gnu_ld" in | |
327 | *:yes) | |
328 | cat > conftest.s <<EOF | |
329 | .section .dtors,$sh_flags,$sh_type | |
e9c9f128 JJ |
330 | .balign 4 |
331 | .byte 'A', 'A', 'A', 'A' | |
e6b6bf09 | 332 | .section .ctors,$sh_flags,$sh_type |
e9c9f128 JJ |
333 | .balign 4 |
334 | .byte 'B', 'B', 'B', 'B' | |
e6b6bf09 | 335 | .section .fini_array.65530,$sh_flags,$sh_type |
e9c9f128 JJ |
336 | .balign 4 |
337 | .byte 'C', 'C', 'C', 'C' | |
e6b6bf09 | 338 | .section .init_array.65530,$sh_flags,$sh_type |
e9c9f128 JJ |
339 | .balign 4 |
340 | .byte 'D', 'D', 'D', 'D' | |
e6b6bf09 | 341 | .section .dtors.64528,$sh_flags,$sh_type |
e9c9f128 JJ |
342 | .balign 4 |
343 | .byte 'E', 'E', 'E', 'E' | |
e6b6bf09 | 344 | .section .ctors.64528,$sh_flags,$sh_type |
e9c9f128 JJ |
345 | .balign 4 |
346 | .byte 'F', 'F', 'F', 'F' | |
e6b6bf09 | 347 | .section .fini_array.01005,$sh_flags,$sh_type |
e9c9f128 JJ |
348 | .balign 4 |
349 | .byte 'G', 'G', 'G', 'G' | |
e6b6bf09 | 350 | .section .init_array.01005,$sh_flags,$sh_type |
e9c9f128 JJ |
351 | .balign 4 |
352 | .byte 'H', 'H', 'H', 'H' | |
353 | .text | |
e992fc2e RO |
354 | .globl _start |
355 | _start: | |
e9c9f128 | 356 | EOF |
e6b6bf09 RO |
357 | if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1 \ |
358 | && $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1 \ | |
359 | && $gcc_cv_objdump -s -j .init_array conftest \ | |
360 | | grep HHHHFFFFDDDDBBBB > /dev/null 2>&1 \ | |
361 | && $gcc_cv_objdump -s -j .fini_array conftest \ | |
362 | | grep GGGGEEEECCCCAAAA > /dev/null 2>&1; then | |
363 | gcc_cv_initfini_array=yes | |
364 | fi | |
365 | ;; | |
366 | *-*-solaris2*:no) | |
367 | # When Solaris ld added constructor priority support, it was | |
368 | # decided to only handle .init_array.N/.fini_array.N since | |
369 | # there was no need for backwards compatibility with | |
370 | # .ctors.N/.dtors.N. .ctors/.dtors remain as separate | |
371 | # sections with correct execution order resp. to | |
372 | # .init_array/.fini_array, while gld merges them into | |
373 | # .init_array/.fini_array. | |
374 | cat > conftest.s <<EOF | |
375 | .section $sh_quote.fini_array.65530$sh_quote,$sh_flags,$sh_type | |
376 | .align 4 | |
e66084a4 | 377 | .byte 'C', 'C', 'C', 'C', 'C', 'C', 'C', 'C' |
e6b6bf09 RO |
378 | .section $sh_quote.init_array.65530$sh_quote,$sh_flags,$sh_type |
379 | .align 4 | |
e66084a4 | 380 | .byte 'D', 'D', 'D', 'D', 'D', 'D', 'D', 'D' |
e6b6bf09 RO |
381 | .section $sh_quote.fini_array.01005$sh_quote,$sh_flags,$sh_type |
382 | .align 4 | |
e66084a4 | 383 | .byte 'G', 'G', 'G', 'G', 'G', 'G', 'G', 'G' |
e6b6bf09 RO |
384 | .section $sh_quote.init_array.01005$sh_quote,$sh_flags,$sh_type |
385 | .align 4 | |
e66084a4 | 386 | .byte 'H', 'H', 'H', 'H', 'H', 'H', 'H', 'H' |
e6b6bf09 RO |
387 | .text |
388 | .globl _start | |
389 | _start: | |
390 | EOF | |
391 | if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1 \ | |
392 | && $gcc_cv_ld -o conftest conftest.o > /dev/null 2>&1 \ | |
393 | && $gcc_cv_objdump -s -j .init_array conftest \ | |
e66084a4 | 394 | | grep HHHHHHHHDDDDDDDD > /dev/null 2>&1 \ |
e6b6bf09 | 395 | && $gcc_cv_objdump -s -j .fini_array conftest \ |
e66084a4 | 396 | | grep GGGGGGGGCCCCCCCC > /dev/null 2>&1; then |
e6b6bf09 RO |
397 | gcc_cv_initfini_array=yes |
398 | fi | |
399 | ;; | |
400 | esac | |
e9c9f128 JJ |
401 | changequote(,)dnl |
402 | rm -f conftest conftest.* | |
403 | changequote([,])dnl | |
404 | fi | |
405 | AC_PREPROC_IFELSE([AC_LANG_SOURCE([ | |
406 | #ifndef __ELF__ | |
e992fc2e | 407 | # error Not an ELF OS |
e9c9f128 JJ |
408 | #endif |
409 | #include <stdlib.h> | |
e992fc2e RO |
410 | #if defined __GLIBC_PREREQ |
411 | # if __GLIBC_PREREQ (2, 4) | |
412 | # else | |
413 | # error GLIBC 2.4 required | |
414 | # endif | |
e9c9f128 | 415 | #else |
e992fc2e RO |
416 | # if defined __sun__ && defined __svr4__ |
417 | /* Solaris ld.so.1 supports .init_array/.fini_array since Solaris 8. */ | |
418 | # else | |
419 | # error The C library not known to support .init_array/.fini_array | |
420 | # endif | |
e9c9f128 | 421 | #endif |
7888f266 | 422 | ])],, [gcc_cv_initfini_array=no]);; |
e9c9f128 JJ |
423 | esac |
424 | else | |
f7f2165c RS |
425 | case "${target}" in |
426 | aarch64*-linux-gnu*) | |
427 | # AArch64 postdates glibc support for .init_array/.fini_array, | |
428 | # so we don't need the preprocessor test above. | |
429 | gcc_cv_initfini_array=yes | |
430 | ;; | |
431 | ||
432 | *) | |
433 | AC_MSG_CHECKING(cross compile... guessing) | |
434 | gcc_cv_initfini_array=no | |
435 | ;; | |
436 | esac | |
e9c9f128 | 437 | fi]) |
67da1534 KC |
438 | enable_initfini_array=$gcc_cv_initfini_array |
439 | ]) | |
e6b6bf09 RO |
440 | AC_DEFINE_UNQUOTED(HAVE_INITFINI_ARRAY_SUPPORT, |
441 | [`if test $enable_initfini_array = yes; then echo 1; else echo 0; fi`], | |
442 | [Define 0/1 if .init_array/.fini_array sections are available and working.]) | |
443 | ]) | |
67da1534 | 444 | |
e0b0fd74 L |
445 | dnl # gcc_GAS_FLAGS |
446 | dnl # Used by gcc_GAS_CHECK_FEATURE | |
447 | dnl # | |
448 | AC_DEFUN([gcc_GAS_FLAGS], | |
449 | [AC_CACHE_CHECK([assembler flags], gcc_cv_as_flags, | |
450 | [ case "$target" in | |
451 | i[[34567]]86-*-linux*) | |
d1227447 TS |
452 | dnl Override the default, which may be incompatible. |
453 | gcc_cv_as_flags=--32 | |
454 | ;; | |
455 | x86_64-*-linux-gnux32) | |
456 | dnl Override the default, which may be incompatible. | |
457 | gcc_cv_as_flags=--x32 | |
458 | ;; | |
459 | x86_64-*-linux*) | |
460 | dnl Override the default, which may be incompatible. | |
461 | gcc_cv_as_flags=--64 | |
e0b0fd74 | 462 | ;; |
88ee1fc7 MS |
463 | powerpc*-*-darwin*) |
464 | dnl Always pass -arch ppc to assembler. | |
465 | gcc_cv_as_flags="-arch ppc" | |
466 | ;; | |
e0b0fd74 L |
467 | *) |
468 | gcc_cv_as_flags=" " | |
469 | ;; | |
470 | esac]) | |
471 | ]) | |
472 | ||
e0b6d0b3 | 473 | dnl gcc_GAS_CHECK_FEATURE(description, cv, |
67da1534 KC |
474 | dnl [extra switches to as], [assembler input], |
475 | dnl [extra testing logic], [command if feature available]) | |
476 | dnl | |
7cad8a8f | 477 | dnl Checks for an assembler feature. |
67da1534 KC |
478 | dnl ASSEMBLER INPUT is fed to the assembler and the feature is available |
479 | dnl if assembly succeeds. If EXTRA TESTING LOGIC is not the empty string, | |
480 | dnl then it is run instead of simply setting CV to "yes" - it is responsible | |
481 | dnl for doing so, if appropriate. | |
482 | AC_DEFUN([gcc_GAS_CHECK_FEATURE], | |
e0b0fd74 L |
483 | [AC_REQUIRE([gcc_GAS_FLAGS])dnl |
484 | AC_CACHE_CHECK([assembler for $1], [$2], | |
67da1534 | 485 | [[$2]=no |
7cad8a8f | 486 | if test x$gcc_cv_as != x; then |
e0b6d0b3 SB |
487 | AS_ECHO([ifelse(m4_substr([$4],0,1),[$], "[$4]", '[$4]')]) > conftest.s |
488 | if AC_TRY_COMMAND([$gcc_cv_as $gcc_cv_as_flags $3 -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD]) | |
67da1534 | 489 | then |
e0b6d0b3 | 490 | ifelse([$5],, [$2]=yes, [$5]) |
67da1534 KC |
491 | else |
492 | echo "configure: failed program was" >&AS_MESSAGE_LOG_FD | |
493 | cat conftest.s >&AS_MESSAGE_LOG_FD | |
494 | fi | |
495 | rm -f conftest.o conftest.s | |
496 | fi]) | |
e0b6d0b3 | 497 | ifelse([$6],,,[dnl |
67da1534 | 498 | if test $[$2] = yes; then |
e0b6d0b3 | 499 | $6 |
61214be1 | 500 | fi]) |
e0b6d0b3 | 501 | ifelse([$7],,,[dnl |
61214be1 | 502 | if test $[$2] != yes; then |
e0b6d0b3 | 503 | $7 |
67da1534 KC |
504 | fi])]) |
505 | ||
506 | dnl GCC_TARGET_TEMPLATE(KEY) | |
507 | dnl ------------------------ | |
508 | dnl Define KEY as a valid configure key on the target machine. | |
509 | ||
510 | m4_define([GCC_TARGET_TEMPLATE], | |
511 | [m4_define([GCC_TARGET_TEMPLATE($1)],[])]) | |
512 | ||
513 | dnl AH_TEMPLATE(KEY, DESCRIPTION) | |
514 | dnl ----------------------------- | |
515 | dnl Issue an autoheader template for KEY, i.e., a comment composed of | |
516 | dnl DESCRIPTION (properly wrapped), and then #undef KEY. Redefinition | |
517 | dnl of the macro in autoheader.m4, to support definition of only a few | |
518 | dnl keys while compiling target libraries. | |
519 | ||
520 | m4_define([AH_TEMPLATE], | |
521 | [AH_VERBATIM([$1],m4_text_wrap([$2 */], [ ], [/* ]) | |
522 | m4_ifdef([GCC_TARGET_TEMPLATE($1)],[],[#ifndef USED_FOR_TARGET | |
523 | ])[#undef $1]m4_ifdef([GCC_TARGET_TEMPLATE($1)],[],[ | |
524 | #endif | |
525 | ]))]) | |
526 | ||
67da1534 KC |
527 | dnl Make sure that build_exeext is looked for |
528 | AC_DEFUN([gcc_AC_BUILD_EXEEXT], [ | |
529 | ac_executable_extensions="$build_exeext"]) | |
530 | ||
75a2bcc0 JM |
531 | dnl GCC_GLIBC_VERSION_GTE_IFELSE(MAJOR, MINOR, IF-TRUE, IF-FALSE) |
532 | dnl ------------------------------------------------------------- | |
533 | dnl If the target glibc version ($glibc_version_major.$glibc_version_minor) | |
534 | dnl is at least MAJOR.MINOR, call IF-TRUE, otherwise call IF-FALSE. | |
535 | AC_DEFUN([GCC_GLIBC_VERSION_GTE_IFELSE], | |
536 | [ | |
537 | AS_IF([test $glibc_version_major -gt $1 \ | |
538 | || ( test $glibc_version_major -eq $1 && test $glibc_version_minor -ge $2 )], | |
539 | [$3], [$4])]) |