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1 | dnl Copyright (C) 2005, 2006, 2007, 2008 Free Software Foundation, Inc. |
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='${INSTALL} -m 644' | |
220 | AC_SUBST(INSTALL_DATA)dnl | |
221 | ]) | |
222 | ||
223 | # mmap(2) blacklisting. Some platforms provide the mmap library routine | |
224 | # but don't support all of the features we need from it. | |
225 | AC_DEFUN([gcc_AC_FUNC_MMAP_BLACKLIST], | |
226 | [ | |
227 | AC_CHECK_HEADER([sys/mman.h], | |
228 | [gcc_header_sys_mman_h=yes], [gcc_header_sys_mman_h=no]) | |
229 | AC_CHECK_FUNC([mmap], [gcc_func_mmap=yes], [gcc_func_mmap=no]) | |
230 | if test "$gcc_header_sys_mman_h" != yes \ | |
231 | || test "$gcc_func_mmap" != yes; then | |
232 | gcc_cv_func_mmap_file=no | |
233 | gcc_cv_func_mmap_dev_zero=no | |
234 | gcc_cv_func_mmap_anon=no | |
235 | else | |
236 | AC_CACHE_CHECK([whether read-only mmap of a plain file works], | |
237 | gcc_cv_func_mmap_file, | |
238 | [# Add a system to this blacklist if | |
239 | # mmap(0, stat_size, PROT_READ, MAP_PRIVATE, fd, 0) doesn't return a | |
240 | # memory area containing the same data that you'd get if you applied | |
241 | # read() to the same fd. The only system known to have a problem here | |
242 | # is VMS, where text files have record structure. | |
243 | case "$host_os" in | |
244 | vms* | ultrix*) | |
245 | gcc_cv_func_mmap_file=no ;; | |
246 | *) | |
247 | gcc_cv_func_mmap_file=yes;; | |
248 | esac]) | |
249 | AC_CACHE_CHECK([whether mmap from /dev/zero works], | |
250 | gcc_cv_func_mmap_dev_zero, | |
251 | [# Add a system to this blacklist if it has mmap() but /dev/zero | |
252 | # does not exist, or if mmapping /dev/zero does not give anonymous | |
253 | # zeroed pages with both the following properties: | |
254 | # 1. If you map N consecutive pages in with one call, and then | |
255 | # unmap any subset of those pages, the pages that were not | |
256 | # explicitly unmapped remain accessible. | |
257 | # 2. If you map two adjacent blocks of memory and then unmap them | |
258 | # both at once, they must both go away. | |
259 | # Systems known to be in this category are Windows (all variants), | |
260 | # VMS, and Darwin. | |
261 | case "$host_os" in | |
262 | vms* | cygwin* | pe | mingw* | darwin* | ultrix* | hpux10* | hpux11.00) | |
263 | gcc_cv_func_mmap_dev_zero=no ;; | |
264 | *) | |
265 | gcc_cv_func_mmap_dev_zero=yes;; | |
266 | esac]) | |
267 | ||
268 | # Unlike /dev/zero, the MAP_ANON(YMOUS) defines can be probed for. | |
269 | AC_CACHE_CHECK([for MAP_ANON(YMOUS)], gcc_cv_decl_map_anon, | |
270 | [AC_COMPILE_IFELSE([AC_LANG_PROGRAM( | |
271 | [#include <sys/types.h> | |
272 | #include <sys/mman.h> | |
273 | #include <unistd.h> | |
274 | ||
275 | #ifndef MAP_ANONYMOUS | |
276 | #define MAP_ANONYMOUS MAP_ANON | |
277 | #endif | |
278 | ], | |
279 | [int n = MAP_ANONYMOUS;])], | |
280 | gcc_cv_decl_map_anon=yes, | |
281 | gcc_cv_decl_map_anon=no)]) | |
282 | ||
283 | if test $gcc_cv_decl_map_anon = no; then | |
284 | gcc_cv_func_mmap_anon=no | |
285 | else | |
286 | AC_CACHE_CHECK([whether mmap with MAP_ANON(YMOUS) works], | |
287 | gcc_cv_func_mmap_anon, | |
288 | [# Add a system to this blacklist if it has mmap() and MAP_ANON or | |
289 | # MAP_ANONYMOUS, but using mmap(..., MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) | |
290 | # doesn't give anonymous zeroed pages with the same properties listed | |
291 | # above for use of /dev/zero. | |
292 | # Systems known to be in this category are Windows, VMS, and SCO Unix. | |
293 | case "$host_os" in | |
294 | vms* | cygwin* | pe | mingw* | sco* | udk* ) | |
295 | gcc_cv_func_mmap_anon=no ;; | |
296 | *) | |
297 | gcc_cv_func_mmap_anon=yes;; | |
298 | esac]) | |
299 | fi | |
300 | fi | |
301 | ||
302 | if test $gcc_cv_func_mmap_file = yes; then | |
303 | AC_DEFINE(HAVE_MMAP_FILE, 1, | |
304 | [Define if read-only mmap of a plain file works.]) | |
305 | fi | |
306 | if test $gcc_cv_func_mmap_dev_zero = yes; then | |
307 | AC_DEFINE(HAVE_MMAP_DEV_ZERO, 1, | |
308 | [Define if mmap of /dev/zero works.]) | |
309 | fi | |
310 | if test $gcc_cv_func_mmap_anon = yes; then | |
311 | AC_DEFINE(HAVE_MMAP_ANON, 1, | |
312 | [Define if mmap with MAP_ANON(YMOUS) works.]) | |
313 | fi | |
314 | ]) | |
315 | ||
67da1534 KC |
316 | dnl Determine if enumerated bitfields are unsigned. ISO C says they can |
317 | dnl be either signed or unsigned. | |
318 | dnl | |
319 | AC_DEFUN([gcc_AC_C_ENUM_BF_UNSIGNED], | |
320 | [AC_CACHE_CHECK(for unsigned enumerated bitfields, gcc_cv_enum_bf_unsigned, | |
321 | [AC_RUN_IFELSE([AC_LANG_SOURCE([#include <stdlib.h> | |
322 | enum t { BLAH = 128 } ; | |
323 | struct s_t { enum t member : 8; } s ; | |
324 | int main(void) | |
325 | { | |
326 | s.member = BLAH; | |
327 | if (s.member < 0) exit(1); | |
328 | exit(0); | |
329 | ||
330 | }])], gcc_cv_enum_bf_unsigned=yes, gcc_cv_enum_bf_unsigned=no, gcc_cv_enum_bf_unsigned=yes)]) | |
331 | if test $gcc_cv_enum_bf_unsigned = yes; then | |
332 | AC_DEFINE(ENUM_BITFIELDS_ARE_UNSIGNED, 1, | |
333 | [Define if enumerated bitfields are treated as unsigned values.]) | |
334 | fi]) | |
335 | ||
336 | dnl Probe number of bits in a byte. | |
337 | dnl Note C89 requires CHAR_BIT >= 8. | |
338 | dnl | |
339 | AC_DEFUN([gcc_AC_C_CHAR_BIT], | |
340 | [AC_CACHE_CHECK(for CHAR_BIT, gcc_cv_decl_char_bit, | |
341 | [AC_EGREP_CPP(found, | |
342 | [#ifdef HAVE_LIMITS_H | |
343 | #include <limits.h> | |
344 | #endif | |
345 | #ifdef CHAR_BIT | |
346 | found | |
347 | #endif], gcc_cv_decl_char_bit=yes, gcc_cv_decl_char_bit=no) | |
348 | ]) | |
349 | if test $gcc_cv_decl_char_bit = no; then | |
350 | AC_CACHE_CHECK(number of bits in a byte, gcc_cv_c_nbby, | |
351 | [i=8 | |
352 | gcc_cv_c_nbby= | |
353 | while test $i -lt 65; do | |
354 | AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, | |
355 | [switch(0) { | |
356 | case (unsigned char)((unsigned long)1 << $i) == ((unsigned long)1 << $i): | |
357 | case (unsigned char)((unsigned long)1<<($i-1)) == ((unsigned long)1<<($i-1)): | |
358 | ; }])], | |
359 | [gcc_cv_c_nbby=$i; break]) | |
360 | i=`expr $i + 1` | |
361 | done | |
362 | test -z "$gcc_cv_c_nbby" && gcc_cv_c_nbby=failed | |
363 | ]) | |
364 | if test $gcc_cv_c_nbby = failed; then | |
365 | AC_MSG_ERROR(cannot determine number of bits in a byte) | |
366 | else | |
367 | AC_DEFINE_UNQUOTED(CHAR_BIT, $gcc_cv_c_nbby, | |
236ec2d7 | 368 | [Define as the number of bits in a byte, if `limits.h' doesn't.]) |
67da1534 KC |
369 | fi |
370 | fi]) | |
371 | ||
372 | AC_DEFUN([gcc_AC_INITFINI_ARRAY], | |
373 | [AC_ARG_ENABLE(initfini-array, | |
374 | [ --enable-initfini-array use .init_array/.fini_array sections], | |
375 | [], [ | |
376 | AC_CACHE_CHECK(for .preinit_array/.init_array/.fini_array support, | |
377 | gcc_cv_initfini_array, [dnl | |
378 | AC_RUN_IFELSE([AC_LANG_SOURCE([ | |
379 | static int x = -1; | |
380 | int main (void) { return x; } | |
381 | int foo (void) { x = 0; } | |
382 | int (*fp) (void) __attribute__ ((section (".init_array"))) = foo;])], | |
383 | [gcc_cv_initfini_array=yes], [gcc_cv_initfini_array=no], | |
384 | [gcc_cv_initfini_array=no])]) | |
385 | enable_initfini_array=$gcc_cv_initfini_array | |
386 | ]) | |
387 | if test $enable_initfini_array = yes; then | |
388 | AC_DEFINE(HAVE_INITFINI_ARRAY, 1, | |
389 | [Define .init_array/.fini_array sections are available and working.]) | |
390 | fi]) | |
391 | ||
392 | dnl # _gcc_COMPUTE_GAS_VERSION | |
393 | dnl # Used by gcc_GAS_VERSION_GTE_IFELSE | |
394 | dnl # | |
395 | dnl # WARNING: | |
396 | dnl # gcc_cv_as_gas_srcdir must be defined before this. | |
397 | dnl # This gross requirement will go away eventually. | |
398 | AC_DEFUN([_gcc_COMPUTE_GAS_VERSION], | |
399 | [gcc_cv_as_bfd_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/bfd | |
400 | for f in $gcc_cv_as_bfd_srcdir/configure \ | |
401 | $gcc_cv_as_gas_srcdir/configure \ | |
402 | $gcc_cv_as_gas_srcdir/configure.in \ | |
403 | $gcc_cv_as_gas_srcdir/Makefile.in ; do | |
404 | gcc_cv_gas_version=`sed -n -e 's/^[[ ]]*\(VERSION=[[0-9]]*\.[[0-9]]*.*\)/\1/p' < $f` | |
405 | if test x$gcc_cv_gas_version != x; then | |
406 | break | |
407 | fi | |
408 | done | |
409 | gcc_cv_gas_major_version=`expr "$gcc_cv_gas_version" : "VERSION=\([[0-9]]*\)"` | |
410 | gcc_cv_gas_minor_version=`expr "$gcc_cv_gas_version" : "VERSION=[[0-9]]*\.\([[0-9]]*\)"` | |
411 | gcc_cv_gas_patch_version=`expr "$gcc_cv_gas_version" : "VERSION=[[0-9]]*\.[[0-9]]*\.\([[0-9]]*\)"` | |
412 | case $gcc_cv_gas_patch_version in | |
413 | "") gcc_cv_gas_patch_version="0" ;; | |
414 | esac | |
415 | gcc_cv_gas_vers=`expr \( \( $gcc_cv_gas_major_version \* 1000 \) \ | |
416 | + $gcc_cv_gas_minor_version \) \* 1000 \ | |
417 | + $gcc_cv_gas_patch_version` | |
418 | ]) []dnl # _gcc_COMPUTE_GAS_VERSION | |
419 | ||
420 | dnl # gcc_GAS_VERSION_GTE_IFELSE([elf,] major, minor, patchlevel, | |
421 | dnl # [command_if_true = :], [command_if_false = :]) | |
422 | dnl # Check to see if the version of GAS is greater than or | |
423 | dnl # equal to the specified version. | |
424 | dnl # | |
425 | dnl # The first ifelse() shortens the shell code if the patchlevel | |
426 | dnl # is unimportant (the usual case). The others handle missing | |
427 | dnl # commands. Note that the tests are structured so that the most | |
428 | dnl # common version number cases are tested first. | |
429 | AC_DEFUN([_gcc_GAS_VERSION_GTE_IFELSE], | |
430 | [ifelse([$1], elf, | |
431 | [if test $in_tree_gas_is_elf = yes \ | |
432 | &&], | |
433 | [if]) test $gcc_cv_gas_vers -ge `expr \( \( $2 \* 1000 \) + $3 \) \* 1000 + $4` | |
434 | then dnl | |
435 | ifelse([$5],,:,[$5])[]dnl | |
436 | ifelse([$6],,,[ | |
437 | else $6]) | |
438 | fi]) | |
439 | ||
440 | AC_DEFUN([gcc_GAS_VERSION_GTE_IFELSE], | |
441 | [AC_REQUIRE([_gcc_COMPUTE_GAS_VERSION])dnl | |
442 | ifelse([$1], elf, [_gcc_GAS_VERSION_GTE_IFELSE($@)], | |
443 | [_gcc_GAS_VERSION_GTE_IFELSE(,$@)])]) | |
444 | ||
e0b0fd74 L |
445 | dnl # gcc_GAS_FLAGS |
446 | dnl # Used by gcc_GAS_CHECK_FEATURE | |
447 | dnl # | |
448 | AC_DEFUN([gcc_GAS_FLAGS], | |
449 | [AC_CACHE_CHECK([assembler flags], gcc_cv_as_flags, | |
450 | [ case "$target" in | |
451 | i[[34567]]86-*-linux*) | |
452 | dnl Always pass --32 to ia32 Linux assembler. | |
453 | gcc_cv_as_flags="--32" | |
454 | ;; | |
88ee1fc7 MS |
455 | powerpc*-*-darwin*) |
456 | dnl Always pass -arch ppc to assembler. | |
457 | gcc_cv_as_flags="-arch ppc" | |
458 | ;; | |
e0b0fd74 L |
459 | *) |
460 | gcc_cv_as_flags=" " | |
461 | ;; | |
462 | esac]) | |
463 | ]) | |
464 | ||
67da1534 KC |
465 | dnl gcc_GAS_CHECK_FEATURE(description, cv, [[elf,]major,minor,patchlevel], |
466 | dnl [extra switches to as], [assembler input], | |
467 | dnl [extra testing logic], [command if feature available]) | |
468 | dnl | |
469 | dnl Checks for an assembler feature. If we are building an in-tree | |
470 | dnl gas, the feature is available if the associated assembler version | |
471 | dnl is greater than or equal to major.minor.patchlevel. If not, then | |
472 | dnl ASSEMBLER INPUT is fed to the assembler and the feature is available | |
473 | dnl if assembly succeeds. If EXTRA TESTING LOGIC is not the empty string, | |
474 | dnl then it is run instead of simply setting CV to "yes" - it is responsible | |
475 | dnl for doing so, if appropriate. | |
476 | AC_DEFUN([gcc_GAS_CHECK_FEATURE], | |
e0b0fd74 L |
477 | [AC_REQUIRE([gcc_GAS_FLAGS])dnl |
478 | AC_CACHE_CHECK([assembler for $1], [$2], | |
67da1534 KC |
479 | [[$2]=no |
480 | ifelse([$3],,,[dnl | |
481 | if test $in_tree_gas = yes; then | |
482 | gcc_GAS_VERSION_GTE_IFELSE($3, [[$2]=yes]) | |
483 | el])if test x$gcc_cv_as != x; then | |
484 | echo ifelse(m4_substr([$5],0,1),[$], "[$5]", '[$5]') > conftest.s | |
e0b0fd74 | 485 | if AC_TRY_COMMAND([$gcc_cv_as $gcc_cv_as_flags $4 -o conftest.o conftest.s >&AS_MESSAGE_LOG_FD]) |
67da1534 KC |
486 | then |
487 | ifelse([$6],, [$2]=yes, [$6]) | |
488 | else | |
489 | echo "configure: failed program was" >&AS_MESSAGE_LOG_FD | |
490 | cat conftest.s >&AS_MESSAGE_LOG_FD | |
491 | fi | |
492 | rm -f conftest.o conftest.s | |
493 | fi]) | |
494 | ifelse([$7],,,[dnl | |
495 | if test $[$2] = yes; then | |
496 | $7 | |
497 | fi])]) | |
498 | ||
499 | dnl GCC_TARGET_TEMPLATE(KEY) | |
500 | dnl ------------------------ | |
501 | dnl Define KEY as a valid configure key on the target machine. | |
502 | ||
503 | m4_define([GCC_TARGET_TEMPLATE], | |
504 | [m4_define([GCC_TARGET_TEMPLATE($1)],[])]) | |
505 | ||
506 | dnl AH_TEMPLATE(KEY, DESCRIPTION) | |
507 | dnl ----------------------------- | |
508 | dnl Issue an autoheader template for KEY, i.e., a comment composed of | |
509 | dnl DESCRIPTION (properly wrapped), and then #undef KEY. Redefinition | |
510 | dnl of the macro in autoheader.m4, to support definition of only a few | |
511 | dnl keys while compiling target libraries. | |
512 | ||
513 | m4_define([AH_TEMPLATE], | |
514 | [AH_VERBATIM([$1],m4_text_wrap([$2 */], [ ], [/* ]) | |
515 | m4_ifdef([GCC_TARGET_TEMPLATE($1)],[],[#ifndef USED_FOR_TARGET | |
516 | ])[#undef $1]m4_ifdef([GCC_TARGET_TEMPLATE($1)],[],[ | |
517 | #endif | |
518 | ]))]) | |
519 | ||
67da1534 KC |
520 | dnl Make sure that build_exeext is looked for |
521 | AC_DEFUN([gcc_AC_BUILD_EXEEXT], [ | |
522 | ac_executable_extensions="$build_exeext"]) | |
523 |