Mercurial > hg > CbC > CbC_gcc
annotate libgomp/acinclude.m4 @ 158:494b0b89df80 default tip
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| author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Mon, 25 May 2020 18:13:55 +0900 |
| parents | 1830386684a0 |
| children |
| rev | line source |
|---|---|
| 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) | |
| 131 | 59 sinclude(../config/cet.m4) |
| 0 | 60 dnl The lines below arrange for aclocal not to bring an installed |
| 61 dnl libtool.m4 into aclocal.m4, while still arranging for automake to | |
| 62 dnl add a definition of LIBTOOL to Makefile.in. | |
| 63 ifelse(,,,[AC_SUBST(LIBTOOL) | |
| 64 AC_DEFUN([AM_PROG_LIBTOOL]) | |
| 65 AC_DEFUN([AC_LIBTOOL_DLOPEN]) | |
| 66 AC_DEFUN([AC_PROG_LD]) | |
| 67 ]) | |
| 68 | |
| 69 dnl ---------------------------------------------------------------------- | |
| 70 dnl This whole bit snagged from libstdc++-v3. | |
| 71 | |
| 72 dnl | |
| 73 dnl LIBGOMP_ENABLE | |
| 74 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING) | |
| 75 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, permit a|b|c) | |
| 76 dnl (FEATURE, DEFAULT, HELP-ARG, HELP-STRING, SHELL-CODE-HANDLER) | |
| 77 dnl | |
| 78 dnl See docs/html/17_intro/configury.html#enable for documentation. | |
| 79 dnl | |
| 80 m4_define([LIBGOMP_ENABLE],[dnl | |
| 81 m4_define([_g_switch],[--enable-$1])dnl | |
| 82 m4_define([_g_help],[AC_HELP_STRING(_g_switch$3,[$4 @<:@default=$2@:>@])])dnl | |
| 83 AC_ARG_ENABLE($1,_g_help, | |
| 84 m4_bmatch([$5], | |
| 85 [^permit ], | |
| 86 [[ | |
| 87 case "$enableval" in | |
| 88 m4_bpatsubst([$5],[permit ])) ;; | |
| 89 *) AC_MSG_ERROR(Unknown argument to enable/disable $1) ;; | |
| 90 dnl Idea for future: generate a URL pointing to | |
| 91 dnl "onlinedocs/configopts.html#whatever" | |
| 92 esac | |
| 93 ]], | |
| 94 [^$], | |
| 95 [[ | |
| 96 case "$enableval" in | |
| 97 yes|no) ;; | |
| 98 *) AC_MSG_ERROR(Argument to enable/disable $1 must be yes or no) ;; | |
| 99 esac | |
| 100 ]], | |
| 101 [[$5]]), | |
| 102 [enable_]m4_bpatsubst([$1],-,_)[=][$2]) | |
| 103 m4_undefine([_g_switch])dnl | |
| 104 m4_undefine([_g_help])dnl | |
| 105 ]) | |
| 106 | |
| 107 | |
| 108 dnl | |
| 109 dnl If GNU ld is in use, check to see if tricky linker opts can be used. If | |
| 110 dnl the native linker is in use, all variables will be defined to something | |
| 111 dnl safe (like an empty string). | |
| 112 dnl | |
| 113 dnl Defines: | |
| 114 dnl SECTION_LDFLAGS='-Wl,--gc-sections' if possible | |
| 115 dnl OPT_LDFLAGS='-Wl,-O1' if possible | |
| 116 dnl LD (as a side effect of testing) | |
| 117 dnl Sets: | |
| 118 dnl with_gnu_ld | |
| 119 dnl libgomp_ld_is_gold (possibly) | |
| 120 dnl libgomp_gnu_ld_version (possibly) | |
| 121 dnl | |
| 122 dnl The last will be a single integer, e.g., version 1.23.45.0.67.89 will | |
| 123 dnl set libgomp_gnu_ld_version to 12345. Zeros cause problems. | |
| 124 dnl | |
| 125 AC_DEFUN([LIBGOMP_CHECK_LINKER_FEATURES], [ | |
| 126 # If we're not using GNU ld, then there's no point in even trying these | |
| 127 # tests. Check for that first. We should have already tested for gld | |
| 128 # by now (in libtool), but require it now just to be safe... | |
| 129 test -z "$SECTION_LDFLAGS" && SECTION_LDFLAGS='' | |
| 130 test -z "$OPT_LDFLAGS" && OPT_LDFLAGS='' | |
| 131 AC_REQUIRE([AC_PROG_LD]) | |
| 132 AC_REQUIRE([AC_PROG_AWK]) | |
| 133 | |
| 134 # The name set by libtool depends on the version of libtool. Shame on us | |
| 135 # for depending on an impl detail, but c'est la vie. Older versions used | |
| 136 # ac_cv_prog_gnu_ld, but now it's lt_cv_prog_gnu_ld, and is copied back on | |
| 137 # top of with_gnu_ld (which is also set by --with-gnu-ld, so that actually | |
| 138 # makes sense). We'll test with_gnu_ld everywhere else, so if that isn't | |
| 139 # set (hence we're using an older libtool), then set it. | |
| 140 if test x${with_gnu_ld+set} != xset; then | |
| 141 if test x${ac_cv_prog_gnu_ld+set} != xset; then | |
| 142 # We got through "ac_require(ac_prog_ld)" and still not set? Huh? | |
| 143 with_gnu_ld=no | |
| 144 else | |
| 145 with_gnu_ld=$ac_cv_prog_gnu_ld | |
| 146 fi | |
| 147 fi | |
| 148 | |
| 149 # Start by getting the version number. I think the libtool test already | |
| 150 # does some of this, but throws away the result. | |
| 151 libgomp_ld_is_gold=no | |
| 152 if $LD --version 2>/dev/null | grep 'GNU gold'> /dev/null 2>&1; then | |
| 153 libgomp_ld_is_gold=yes | |
| 154 fi | |
| 155 changequote(,) | |
|
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156 ldver=`$LD --version 2>/dev/null | |
| 145 | 157 sed -e 's/[. ][0-9]\{8\}$//;s/.* \([^ ]\{1,\}\)$/\1/; q'` |
| 0 | 158 changequote([,]) |
| 159 libgomp_gnu_ld_version=`echo $ldver | \ | |
| 160 $AWK -F. '{ if (NF<3) [$]3=0; print ([$]1*100+[$]2)*100+[$]3 }'` | |
| 161 | |
| 162 # Set --gc-sections. | |
| 163 if test "$with_gnu_ld" = "notbroken"; then | |
| 164 # GNU ld it is! Joy and bunny rabbits! | |
| 165 | |
| 166 # All these tests are for C++; save the language and the compiler flags. | |
| 167 # Need to do this so that g++ won't try to link in libstdc++ | |
| 168 ac_test_CFLAGS="${CFLAGS+set}" | |
| 169 ac_save_CFLAGS="$CFLAGS" | |
| 170 CFLAGS='-x c++ -Wl,--gc-sections' | |
| 171 | |
| 172 # Check for -Wl,--gc-sections | |
| 173 # XXX This test is broken at the moment, as symbols required for linking | |
| 174 # are now in libsupc++ (not built yet). In addition, this test has | |
| 175 # cored on solaris in the past. In addition, --gc-sections doesn't | |
| 176 # really work at the moment (keeps on discarding used sections, first | |
| 177 # .eh_frame and now some of the glibc sections for iconv). | |
| 178 # Bzzzzt. Thanks for playing, maybe next time. | |
| 179 AC_MSG_CHECKING([for ld that supports -Wl,--gc-sections]) | |
| 180 AC_TRY_RUN([ | |
| 181 int main(void) | |
| 182 { | |
| 183 try { throw 1; } | |
| 184 catch (...) { }; | |
| 185 return 0; | |
| 186 } | |
| 187 ], [ac_sectionLDflags=yes],[ac_sectionLDflags=no], [ac_sectionLDflags=yes]) | |
| 188 if test "$ac_test_CFLAGS" = set; then | |
| 189 CFLAGS="$ac_save_CFLAGS" | |
| 190 else | |
| 191 # this is the suspicious part | |
| 192 CFLAGS='' | |
| 193 fi | |
| 194 if test "$ac_sectionLDflags" = "yes"; then | |
| 195 SECTION_LDFLAGS="-Wl,--gc-sections $SECTION_LDFLAGS" | |
| 196 fi | |
| 197 AC_MSG_RESULT($ac_sectionLDflags) | |
| 198 fi | |
| 199 | |
| 200 # Set linker optimization flags. | |
| 201 if test x"$with_gnu_ld" = x"yes"; then | |
| 202 OPT_LDFLAGS="-Wl,-O1 $OPT_LDFLAGS" | |
| 203 fi | |
| 204 | |
| 205 AC_SUBST(SECTION_LDFLAGS) | |
| 206 AC_SUBST(OPT_LDFLAGS) | |
| 207 ]) | |
| 208 | |
| 209 | |
| 210 dnl | |
| 211 dnl Add version tags to symbols in shared library (or not), additionally | |
| 212 dnl marking other symbols as private/local (or not). | |
| 213 dnl | |
| 214 dnl --enable-symvers=style adds a version script to the linker call when | |
| 215 dnl creating the shared library. The choice of version script is | |
| 216 dnl controlled by 'style'. | |
| 217 dnl --disable-symvers does not. | |
| 218 dnl + Usage: LIBGOMP_ENABLE_SYMVERS[(DEFAULT)] | |
| 219 dnl Where DEFAULT is either 'yes' or 'no'. Passing `yes' tries to | |
| 220 dnl choose a default style based on linker characteristics. Passing | |
| 221 dnl 'no' disables versioning. | |
| 222 dnl | |
| 223 AC_DEFUN([LIBGOMP_ENABLE_SYMVERS], [ | |
| 224 | |
| 225 LIBGOMP_ENABLE(symvers,yes,[=STYLE], | |
| 226 [enables symbol versioning of the shared library], | |
|
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227 [permit yes|no|gnu*|sun]) |
| 0 | 228 |
| 229 # If we never went through the LIBGOMP_CHECK_LINKER_FEATURES macro, then we | |
| 230 # don't know enough about $LD to do tricks... | |
| 231 AC_REQUIRE([LIBGOMP_CHECK_LINKER_FEATURES]) | |
| 111 | 232 |
| 233 # Turn a 'yes' into a suitable default. | |
| 234 if test x$enable_symvers = xyes ; then | |
| 235 # FIXME The following test is too strict, in theory. | |
| 236 if test $enable_shared = no || test "x$LD" = x; then | |
| 237 enable_symvers=no | |
|
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238 else |
| 111 | 239 if test $with_gnu_ld = yes ; then |
| 240 enable_symvers=gnu | |
| 241 else | |
| 242 case ${target_os} in | |
| 243 # Sun symbol versioning exists since Solaris 2.5. | |
| 244 solaris2.[[5-9]]* | solaris2.1[[0-9]]*) | |
| 245 enable_symvers=sun ;; | |
| 246 *) | |
| 247 enable_symvers=no ;; | |
| 248 esac | |
| 249 fi | |
|
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250 fi |
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251 fi |
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252 |
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253 # Check if 'sun' was requested on non-Solaris 2 platforms. |
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254 if test x$enable_symvers = xsun ; then |
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255 case ${target_os} in |
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256 solaris2*) |
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257 # All fine. |
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258 ;; |
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259 *) |
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260 # Unlikely to work. |
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261 AC_MSG_WARN([=== You have requested Sun symbol versioning, but]) |
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262 AC_MSG_WARN([=== you are not targetting Solaris 2.]) |
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263 AC_MSG_WARN([=== Symbol versioning will be disabled.]) |
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264 enable_symvers=no |
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265 ;; |
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266 esac |
| 0 | 267 fi |
| 268 | |
| 269 # Check to see if libgcc_s exists, indicating that shared libgcc is possible. | |
| 270 if test $enable_symvers != no; then | |
| 271 AC_MSG_CHECKING([for shared libgcc]) | |
| 272 ac_save_CFLAGS="$CFLAGS" | |
| 273 CFLAGS=' -lgcc_s' | |
| 274 AC_TRY_LINK(, [return 0;], libgomp_shared_libgcc=yes, libgomp_shared_libgcc=no) | |
| 275 CFLAGS="$ac_save_CFLAGS" | |
| 276 if test $libgomp_shared_libgcc = no; then | |
| 277 cat > conftest.c <<EOF | |
| 278 int main (void) { return 0; } | |
| 279 EOF | |
| 280 changequote(,)dnl | |
| 281 libgomp_libgcc_s_suffix=`${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS \ | |
| 282 -shared -shared-libgcc -o conftest.so \ | |
| 283 conftest.c -v 2>&1 >/dev/null \ | |
| 284 | sed -n 's/^.* -lgcc_s\([^ ]*\) .*$/\1/p'` | |
| 285 changequote([,])dnl | |
| 286 rm -f conftest.c conftest.so | |
| 287 if test x${libgomp_libgcc_s_suffix+set} = xset; then | |
| 288 CFLAGS=" -lgcc_s$libgomp_libgcc_s_suffix" | |
| 289 AC_TRY_LINK(, [return 0;], libgomp_shared_libgcc=yes) | |
| 290 CFLAGS="$ac_save_CFLAGS" | |
| 291 fi | |
| 292 fi | |
| 293 AC_MSG_RESULT($libgomp_shared_libgcc) | |
| 294 fi | |
| 295 | |
| 296 # For GNU ld, we need at least this version. The format is described in | |
| 297 # LIBGOMP_CHECK_LINKER_FEATURES above. | |
| 298 libgomp_min_gnu_ld_version=21400 | |
| 299 # XXXXXXXXXXX libgomp_gnu_ld_version=21390 | |
| 300 | |
| 301 # Check to see if unspecified "yes" value can win, given results above. | |
| 302 # Change "yes" into either "no" or a style name. | |
|
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303 if test $enable_symvers != no && test $libgomp_shared_libgcc = yes; then |
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parents:
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304 if test $with_gnu_ld = yes; then |
| 0 | 305 if test $libgomp_gnu_ld_version -ge $libgomp_min_gnu_ld_version ; then |
| 306 enable_symvers=gnu | |
| 307 elif test $libgomp_ld_is_gold = yes ; then | |
| 308 enable_symvers=gnu | |
| 309 else | |
| 310 # The right tools, the right setup, but too old. Fallbacks? | |
| 311 AC_MSG_WARN(=== Linker version $libgomp_gnu_ld_version is too old for) | |
| 312 AC_MSG_WARN(=== full symbol versioning support in this release of GCC.) | |
| 313 AC_MSG_WARN(=== You would need to upgrade your binutils to version) | |
| 314 AC_MSG_WARN(=== $libgomp_min_gnu_ld_version or later and rebuild GCC.) | |
| 315 if test $libgomp_gnu_ld_version -ge 21200 ; then | |
| 316 # Globbing fix is present, proper block support is not. | |
| 317 dnl AC_MSG_WARN([=== Dude, you are soooo close. Maybe we can fake it.]) | |
| 318 dnl enable_symvers=??? | |
| 319 AC_MSG_WARN([=== Symbol versioning will be disabled.]) | |
| 320 enable_symvers=no | |
| 321 else | |
| 322 # 2.11 or older. | |
| 323 AC_MSG_WARN([=== Symbol versioning will be disabled.]) | |
| 324 enable_symvers=no | |
| 325 fi | |
| 326 fi | |
|
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327 elif test $enable_symvers = sun; then |
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328 : All interesting versions of Sun ld support sun style symbol versioning. |
| 0 | 329 else |
| 330 # just fail for now | |
| 331 AC_MSG_WARN([=== You have requested some kind of symbol versioning, but]) | |
| 332 AC_MSG_WARN([=== either you are not using a supported linker, or you are]) | |
| 333 AC_MSG_WARN([=== not building a shared libgcc_s (which is required).]) | |
| 334 AC_MSG_WARN([=== Symbol versioning will be disabled.]) | |
| 335 enable_symvers=no | |
| 336 fi | |
| 337 fi | |
| 338 | |
| 339 AC_CACHE_CHECK([whether the target supports .symver directive], | |
| 340 libgomp_cv_have_as_symver_directive, [ | |
| 341 AC_TRY_COMPILE([void foo (void); __asm (".symver foo, bar@SYMVER");], | |
| 342 [], libgomp_cv_have_as_symver_directive=yes, | |
| 343 libgomp_cv_have_as_symver_directive=no)]) | |
| 344 if test $libgomp_cv_have_as_symver_directive = yes; then | |
| 345 AC_DEFINE(HAVE_AS_SYMVER_DIRECTIVE, 1, | |
| 346 [Define to 1 if the target assembler supports .symver directive.]) | |
| 347 fi | |
| 348 | |
| 349 AM_CONDITIONAL(LIBGOMP_BUILD_VERSIONED_SHLIB, test $enable_symvers != no) | |
|
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350 AM_CONDITIONAL(LIBGOMP_BUILD_VERSIONED_SHLIB_GNU, test $enable_symvers = gnu) |
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351 AM_CONDITIONAL(LIBGOMP_BUILD_VERSIONED_SHLIB_SUN, test $enable_symvers = sun) |
| 0 | 352 AC_MSG_NOTICE(versioning on shared library symbols is $enable_symvers) |
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353 |
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354 if test $enable_symvers != no ; then |
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355 case ${target_os} in |
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356 # The Solaris 2 runtime linker doesn't support the GNU extension of |
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357 # binding the same symbol to different versions |
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358 solaris2*) |
| 111 | 359 ;; |
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360 # Other platforms with GNU symbol versioning (GNU/Linux, more?) do. |
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361 *) |
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362 AC_DEFINE(HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT, 1, |
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363 [Define to 1 if the target runtime linker supports binding the same symbol to different versions.]) |
| 111 | 364 ;; |
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365 esac |
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366 fi |
| 0 | 367 ]) |