Mercurial > hg > CbC > CbC_gcc
annotate libgomp/acinclude.m4 @ 108:7ad14f446135
add CbC-example/rectypeTest/
author | Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> |
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date | Thu, 14 Jun 2012 20:30:24 +0900 |
parents | f6334be47118 |
children | 04ced10e8804 |
rev | line source |
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0 | 1 dnl ---------------------------------------------------------------------- |
2 dnl This whole bit snagged from libgfortran. | |
3 | |
4 dnl Check whether the target supports __sync_*_compare_and_swap. | |
5 AC_DEFUN([LIBGOMP_CHECK_SYNC_BUILTINS], [ | |
6 AC_CACHE_CHECK([whether the target supports __sync_*_compare_and_swap], | |
7 libgomp_cv_have_sync_builtins, [ | |
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8 AC_TRY_LINK([], [int foo; __sync_val_compare_and_swap(&foo, 0, 1);], |
0 | 9 libgomp_cv_have_sync_builtins=yes, libgomp_cv_have_sync_builtins=no)]) |
10 if test $libgomp_cv_have_sync_builtins = yes; then | |
11 AC_DEFINE(HAVE_SYNC_BUILTINS, 1, | |
12 [Define to 1 if the target supports __sync_*_compare_and_swap]) | |
13 fi]) | |
14 | |
15 dnl Check whether the target supports hidden visibility. | |
16 AC_DEFUN([LIBGOMP_CHECK_ATTRIBUTE_VISIBILITY], [ | |
17 AC_CACHE_CHECK([whether the target supports hidden visibility], | |
18 libgomp_cv_have_attribute_visibility, [ | |
19 save_CFLAGS="$CFLAGS" | |
20 CFLAGS="$CFLAGS -Werror" | |
21 AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }], | |
22 [], libgomp_cv_have_attribute_visibility=yes, | |
23 libgomp_cv_have_attribute_visibility=no) | |
24 CFLAGS="$save_CFLAGS"]) | |
25 if test $libgomp_cv_have_attribute_visibility = yes; then | |
26 AC_DEFINE(HAVE_ATTRIBUTE_VISIBILITY, 1, | |
27 [Define to 1 if the target supports __attribute__((visibility(...))).]) | |
28 fi]) | |
29 | |
30 dnl Check whether the target supports dllexport | |
31 AC_DEFUN([LIBGOMP_CHECK_ATTRIBUTE_DLLEXPORT], [ | |
32 AC_CACHE_CHECK([whether the target supports dllexport], | |
33 libgomp_cv_have_attribute_dllexport, [ | |
34 save_CFLAGS="$CFLAGS" | |
35 CFLAGS="$CFLAGS -Werror" | |
36 AC_TRY_COMPILE([void __attribute__((dllexport)) foo(void) { }], | |
37 [], libgomp_cv_have_attribute_dllexport=yes, | |
38 libgomp_cv_have_attribute_dllexport=no) | |
39 CFLAGS="$save_CFLAGS"]) | |
40 if test $libgomp_cv_have_attribute_dllexport = yes; then | |
41 AC_DEFINE(HAVE_ATTRIBUTE_DLLEXPORT, 1, | |
42 [Define to 1 if the target supports __attribute__((dllexport)).]) | |
43 fi]) | |
44 | |
45 dnl Check whether the target supports symbol aliases. | |
46 AC_DEFUN([LIBGOMP_CHECK_ATTRIBUTE_ALIAS], [ | |
47 AC_CACHE_CHECK([whether the target supports symbol aliases], | |
48 libgomp_cv_have_attribute_alias, [ | |
49 AC_TRY_LINK([ | |
50 void foo(void) { } | |
51 extern void bar(void) __attribute__((alias("foo")));], | |
52 [bar();], libgomp_cv_have_attribute_alias=yes, libgomp_cv_have_attribute_alias=no)]) | |
53 if test $libgomp_cv_have_attribute_alias = yes; then | |
54 AC_DEFINE(HAVE_ATTRIBUTE_ALIAS, 1, | |
55 [Define to 1 if the target supports __attribute__((alias(...))).]) | |
56 fi]) | |
57 | |
58 sinclude(../libtool.m4) | |
59 dnl The lines below arrange for aclocal not to bring an installed | |
60 dnl libtool.m4 into aclocal.m4, while still arranging for automake to | |
61 dnl add a definition of LIBTOOL to Makefile.in. | |
62 ifelse(,,,[AC_SUBST(LIBTOOL) | |
63 AC_DEFUN([AM_PROG_LIBTOOL]) | |
64 AC_DEFUN([AC_LIBTOOL_DLOPEN]) | |
65 AC_DEFUN([AC_PROG_LD]) | |
66 ]) | |
67 | |
68 dnl ---------------------------------------------------------------------- | |
69 dnl This whole bit snagged from libstdc++-v3. | |
70 | |
71 dnl | |
72 dnl LIBGOMP_ENABLE | |
73 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING) | |
74 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c) | |
75 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER) | |
76 dnl | |
77 dnl See docs/html/17_intro/configury.html#enable for documentation. | |
78 dnl | |
79 m4_define([LIBGOMP_ENABLE],[dnl | |
80 m4_define([_g_switch],[--enable-$1])dnl | |
81 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl | |
82 AC_ARG_ENABLE($1,_g_help, | |
83 m4_bmatch([$5], | |
84 [^permit ], | |
85 [[ | |
86 case "$enableval" in | |
87 m4_bpatsubst([$5],[permit ])) ;; | |
88 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;; | |
89 dnl Idea for future: generate a URL pointing to | |
90 dnl "onlinedocs/configopts.html#whatever" | |
91 esac | |
92 ]], | |
93 [^$], | |
94 [[ | |
95 case "$enableval" in | |
96 yes|no) ;; | |
97 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;; | |
98 esac | |
99 ]], | |
100 [[$5]]), | |
101 [enable_]m4_bpatsubst([$1],-,_)[=][$2]) | |
102 m4_undefine([_g_switch])dnl | |
103 m4_undefine([_g_help])dnl | |
104 ]) | |
105 | |
106 | |
107 dnl | |
108 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If | |
109 dnl the native linker is in use, all variables will be defined to something | |
110 dnl safe (like an empty string). | |
111 dnl | |
112 dnl Defines: | |
113 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible | |
114 dnl OPT_LDFLAGS='-Wl,-O1' if possible | |
115 dnl LD (as a side effect of testing) | |
116 dnl Sets: | |
117 dnl with_gnu_ld | |
118 dnl libgomp_ld_is_gold (possibly) | |
119 dnl libgomp_gnu_ld_version (possibly) | |
120 dnl | |
121 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will | |
122 dnl set libgomp_gnu_ld_version to 12345. Zeros cause problems. | |
123 dnl | |
124 AC_DEFUN([LIBGOMP_CHECK_LINKER_FEATURES], [ | |
125 # If we're not using GNU ld, then there's no point in even trying these | |
126 # tests. Check for that first. We should have already tested for gld | |
127 # by now (in libtool), but require it now just to be safe... | |
128 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS='' | |
129 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS='' | |
130 AC_REQUIRE([AC_PROG_LD]) | |
131 AC_REQUIRE([AC_PROG_AWK]) | |
132 | |
133 # The name set by libtool depends on the version of libtool. Shame on us | |
134 # for depending on an impl detail, but c'est la vie. Older versions used | |
135 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on | |
136 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually | |
137 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't | |
138 # set (hence we're using an older libtool), then set it. | |
139 if test x${with_gnu_ld+set} != xset; then | |
140 if test x${ac_cv_prog_gnu_ld+set} != xset; then | |
141 # We got through "ac_require(ac_prog_ld)" and still not set? Huh? | |
142 with_gnu_ld=no | |
143 else | |
144 with_gnu_ld=$ac_cv_prog_gnu_ld | |
145 fi | |
146 fi | |
147 | |
148 # Start by getting the version number. I think the libtool test already | |
149 # does some of this, but throws away the result. | |
150 libgomp_ld_is_gold=no | |
151 if $LD --version 2>/dev/null | grep 'GNU gold'> /dev/null 2>&1; then | |
152 libgomp_ld_is_gold=yes | |
153 fi | |
154 changequote(,) | |
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155 ldver=`$LD --version 2>/dev/null | |
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156 sed -e 's/GNU gold /GNU ld /;s/GNU ld version /GNU ld /;s/GNU ld ([^)]*) /GNU ld /;s/GNU ld \([0-9.][0-9.]*\).*/\1/; q'` |
0 | 157 changequote([,]) |
158 libgomp_gnu_ld_version=`echo $ldver | \ | |
159 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'` | |
160 | |
161 # Set --gc-sections. | |
162 if test "$with_gnu_ld" = "notbroken"; then | |
163 # GNU ld it is! Joy and bunny rabbits! | |
164 | |
165 # All these tests are for C++; save the language and the compiler flags. | |
166 # Need to do this so that g++ won't try to link in libstdc++ | |
167 ac_test_CFLAGS="${CFLAGS+set}" | |
168 ac_save_CFLAGS="$CFLAGS" | |
169 CFLAGS='-x c++ -Wl,--gc-sections' | |
170 | |
171 # Check for -Wl,--gc-sections | |
172 # XXX This test is broken at the moment, as symbols required for linking | |
173 # are now in libsupc++ (not built yet). In addition, this test has | |
174 # cored on solaris in the past. In addition, --gc-sections doesn't | |
175 # really work at the moment (keeps on discarding used sections, first | |
176 # .eh_frame and now some of the glibc sections for iconv). | |
177 # Bzzzzt. Thanks for playing, maybe next time. | |
178 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections]) | |
179 AC_TRY_RUN([ | |
180 int main(void) | |
181 { | |
182 try { throw 1; } | |
183 catch (...) { }; | |
184 return 0; | |
185 } | |
186 ], [ac_sectionLDflags=yes],[ac_sectionLDflags=no], [ac_sectionLDflags=yes]) | |
187 if test "$ac_test_CFLAGS" = set; then | |
188 CFLAGS="$ac_save_CFLAGS" | |
189 else | |
190 # this is the suspicious part | |
191 CFLAGS='' | |
192 fi | |
193 if test "$ac_sectionLDflags" = "yes"; then | |
194 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS" | |
195 fi | |
196 AC_MSG_RESULT($ac_sectionLDflags) | |
197 fi | |
198 | |
199 # Set linker optimization flags. | |
200 if test x"$with_gnu_ld" = x"yes"; then | |
201 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS" | |
202 fi | |
203 | |
204 AC_SUBST(SECTION_LDFLAGS) | |
205 AC_SUBST(OPT_LDFLAGS) | |
206 ]) | |
207 | |
208 | |
209 dnl | |
210 dnl Add version tags to symbols in shared library (or not), additionally | |
211 dnl marking other symbols as private/local (or not). | |
212 dnl | |
213 dnl --enable-symvers=style adds a version script to the linker call when | |
214 dnl creating the shared library. The choice of version script is | |
215 dnl controlled by 'style'. | |
216 dnl --disable-symvers does not. | |
217 dnl + Usage: LIBGOMP_ENABLE_SYMVERS[(DEFAULT)] | |
218 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to | |
219 dnl choose a default style based on linker characteristics. Passing | |
220 dnl 'no' disables versioning. | |
221 dnl | |
222 AC_DEFUN([LIBGOMP_ENABLE_SYMVERS], [ | |
223 | |
224 LIBGOMP_ENABLE(symvers,yes,[=STYLE], | |
225 [enables symbol versioning of the shared library], | |
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226 [permit yes|no|gnu*|sun]) |
0 | 227 |
228 # If we never went through the LIBGOMP_CHECK_LINKER_FEATURES macro, then we | |
229 # don't know enough about $LD to do tricks... | |
230 AC_REQUIRE([LIBGOMP_CHECK_LINKER_FEATURES]) | |
231 # FIXME The following test is too strict, in theory. | |
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232 if test $enable_shared = no || test "x$LD" = x; then |
0 | 233 enable_symvers=no |
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234 else |
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235 if test $with_gnu_ld = yes ; then |
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236 enable_symvers=gnu |
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237 else |
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238 case ${target_os} in |
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239 # Sun symbol versioning exists since Solaris 2.5. |
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240 solaris2.[[5-9]]* | solaris2.1[[0-9]]*) |
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241 enable_symvers=sun ;; |
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242 *) |
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243 enable_symvers=no ;; |
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244 esac |
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245 fi |
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246 fi |
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247 |
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248 # Check if 'sun' was requested on non-Solaris 2 platforms. |
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249 if test x$enable_symvers = xsun ; then |
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250 case ${target_os} in |
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251 solaris2*) |
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252 # All fine. |
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253 ;; |
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254 *) |
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255 # Unlikely to work. |
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256 AC_MSG_WARN([=== You have requested Sun symbol versioning, but]) |
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257 AC_MSG_WARN([=== you are not targetting Solaris 2.]) |
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258 AC_MSG_WARN([=== Symbol versioning will be disabled.]) |
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259 enable_symvers=no |
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260 ;; |
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261 esac |
0 | 262 fi |
263 | |
264 # Check to see if libgcc_s exists, indicating that shared libgcc is possible. | |
265 if test $enable_symvers != no; then | |
266 AC_MSG_CHECKING([for shared libgcc]) | |
267 ac_save_CFLAGS="$CFLAGS" | |
268 CFLAGS=' -lgcc_s' | |
269 AC_TRY_LINK(, [return 0;], libgomp_shared_libgcc=yes, libgomp_shared_libgcc=no) | |
270 CFLAGS="$ac_save_CFLAGS" | |
271 if test $libgomp_shared_libgcc = no; then | |
272 cat > conftest.c <<EOF | |
273 int main (void) { return 0; } | |
274 EOF | |
275 changequote(,)dnl | |
276 libgomp_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \ | |
277 -shared -shared-libgcc -o conftest.so \ | |
278 conftest.c -v 2>&1 >/dev/null \ | |
279 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'` | |
280 changequote([,])dnl | |
281 rm -f conftest.c conftest.so | |
282 if test x${libgomp_libgcc_s_suffix+set} = xset; then | |
283 CFLAGS=" -lgcc_s$libgomp_libgcc_s_suffix" | |
284 AC_TRY_LINK(, [return 0;], libgomp_shared_libgcc=yes) | |
285 CFLAGS="$ac_save_CFLAGS" | |
286 fi | |
287 fi | |
288 AC_MSG_RESULT($libgomp_shared_libgcc) | |
289 fi | |
290 | |
291 # For GNU ld, we need at least this version. The format is described in | |
292 # LIBGOMP_CHECK_LINKER_FEATURES above. | |
293 libgomp_min_gnu_ld_version=21400 | |
294 # XXXXXXXXXXX libgomp_gnu_ld_version=21390 | |
295 | |
296 # Check to see if unspecified "yes" value can win, given results above. | |
297 # Change "yes" into either "no" or a style name. | |
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298 if test $enable_symvers != no && test $libgomp_shared_libgcc = yes; then |
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299 if test $with_gnu_ld = yes; then |
0 | 300 if test $libgomp_gnu_ld_version -ge $libgomp_min_gnu_ld_version ; then |
301 enable_symvers=gnu | |
302 elif test $libgomp_ld_is_gold = yes ; then | |
303 enable_symvers=gnu | |
304 else | |
305 # The right tools, the right setup, but too old. Fallbacks? | |
306 AC_MSG_WARN(=== Linker version $libgomp_gnu_ld_version is too old for) | |
307 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.) | |
308 AC_MSG_WARN(=== You would need to upgrade your binutils to version) | |
309 AC_MSG_WARN(=== $libgomp_min_gnu_ld_version or later and rebuild GCC.) | |
310 if test $libgomp_gnu_ld_version -ge 21200 ; then | |
311 # Globbing fix is present, proper block support is not. | |
312 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.]) | |
313 dnl enable_symvers=??? | |
314 AC_MSG_WARN([=== Symbol versioning will be disabled.]) | |
315 enable_symvers=no | |
316 else | |
317 # 2.11 or older. | |
318 AC_MSG_WARN([=== Symbol versioning will be disabled.]) | |
319 enable_symvers=no | |
320 fi | |
321 fi | |
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322 elif test $enable_symvers = sun; then |
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323 : All interesting versions of Sun ld support sun style symbol versioning. |
0 | 324 else |
325 # just fail for now | |
326 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but]) | |
327 AC_MSG_WARN([=== either you are not using a supported linker, or you are]) | |
328 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).]) | |
329 AC_MSG_WARN([=== Symbol versioning will be disabled.]) | |
330 enable_symvers=no | |
331 fi | |
332 fi | |
333 | |
334 AC_CACHE_CHECK([whether the target supports .symver directive], | |
335 libgomp_cv_have_as_symver_directive, [ | |
336 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");], | |
337 [], libgomp_cv_have_as_symver_directive=yes, | |
338 libgomp_cv_have_as_symver_directive=no)]) | |
339 if test $libgomp_cv_have_as_symver_directive = yes; then | |
340 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1, | |
341 [Define to 1 if the target assembler supports .symver directive.]) | |
342 fi | |
343 | |
344 AM_CONDITIONAL(LIBGOMP_BUILD_VERSIONED_SHLIB, test $enable_symvers != no) | |
67
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345 AM_CONDITIONAL(LIBGOMP_BUILD_VERSIONED_SHLIB_GNU, test $enable_symvers = gnu) |
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346 AM_CONDITIONAL(LIBGOMP_BUILD_VERSIONED_SHLIB_SUN, test $enable_symvers = sun) |
0 | 347 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers) |
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348 |
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349 if test $enable_symvers != no ; then |
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350 case ${target_os} in |
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351 # The Solaris 2 runtime linker doesn't support the GNU extension of |
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352 # binding the same symbol to different versions |
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353 solaris2*) |
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354 symvers_renaming=no ;; |
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355 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do. |
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356 *) |
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357 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1, |
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358 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.]) |
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359 symvers_renaming=yes ;; |
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360 esac |
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361 else |
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362 symvers_renaming=no |
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363 fi |
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364 AM_CONDITIONAL(LIBGOMP_BUILD_VERSIONED_SHLIB_SOL2, test $symvers_renaming = no) |
0 | 365 ]) |