m4_include(../config/acx.m4)
m4_include(../config/no-executables.m4)
+m4_include(../config/math.m4)
+m4_include(../config/ax_check_define.m4)
+m4_include(../config/enable.m4)
+m4_include(../config/cet.m4)
dnl Check that we have a working GNU Fortran compiler
AC_DEFUN([LIBGFOR_WORKING_GFORTRAN], [
AC_DEFUN([AC_PROG_LD])
])
-dnl Check whether the target is ILP32.
-AC_DEFUN([LIBGFOR_TARGET_ILP32], [
- AC_CACHE_CHECK([whether the target is ILP32], target_ilp32, [
- save_CFLAGS="$CFLAGS"
- CFLAGS="-O2"
- AC_TRY_LINK(,[
-if (sizeof(int) == 4 && sizeof(long) == 4 && sizeof(void *) == 4)
- ;
-else
- undefined_function ();
- ],
- target_ilp32=yes,
- target_ilp32=no)
- CFLAGS="$save_CFLAGS"])
- if test $target_ilp32 = yes; then
- AC_DEFINE(TARGET_ILP32, 1,
- [Define to 1 if the target is ILP32.])
- fi
- ])
-
dnl Check whether the target supports hidden visibility.
AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_VISIBILITY], [
AC_CACHE_CHECK([whether the target supports hidden visibility],
- have_attribute_visibility, [
+ libgfor_cv_have_attribute_visibility, [
save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Werror"
- AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
- [], have_attribute_visibility=yes,
- have_attribute_visibility=no)
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[void __attribute__((visibility("hidden"))) foo(void) { }]], [])],
+ libgfor_cv_have_attribute_visibility=yes,
+ libgfor_cv_have_attribute_visibility=no)
CFLAGS="$save_CFLAGS"])
- if test $have_attribute_visibility = yes; then
+ if test $libgfor_cv_have_attribute_visibility = yes; then
AC_DEFINE(HAVE_ATTRIBUTE_VISIBILITY, 1,
[Define to 1 if the target supports __attribute__((visibility(...))).])
fi])
-dnl Check whether the target supports dllexport
-AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_DLLEXPORT], [
- AC_CACHE_CHECK([whether the target supports dllexport],
- have_attribute_dllexport, [
- save_CFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS -Werror"
- AC_TRY_COMPILE([void __attribute__((dllexport)) foo(void) { }],
- [], have_attribute_dllexport=yes,
- have_attribute_dllexport=no)
- CFLAGS="$save_CFLAGS"])
- if test $have_attribute_dllexport = yes; then
- AC_DEFINE(HAVE_ATTRIBUTE_DLLEXPORT, 1,
- [Define to 1 if the target supports __attribute__((dllexport)).])
- fi])
-
dnl Check whether the target supports symbol aliases.
AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_ALIAS], [
AC_CACHE_CHECK([whether the target supports symbol aliases],
- have_attribute_alias, [
- AC_TRY_LINK([
+ libgfor_cv_have_attribute_alias, [
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[
void foo(void) { }
-extern void bar(void) __attribute__((alias("foo")));],
- [bar();], have_attribute_alias=yes, have_attribute_alias=no)])
- if test $have_attribute_alias = yes; then
+extern void bar(void) __attribute__((alias("foo")));]],
+ [[bar();]])], libgfor_cv_have_attribute_alias=yes, libgfor_cv_have_attribute_alias=no)])
+ if test $libgfor_cv_have_attribute_alias = yes; then
AC_DEFINE(HAVE_ATTRIBUTE_ALIAS, 1,
[Define to 1 if the target supports __attribute__((alias(...))).])
fi])
-dnl Check whether the target supports __sync_fetch_and_add.
-AC_DEFUN([LIBGFOR_CHECK_SYNC_FETCH_AND_ADD], [
- AC_CACHE_CHECK([whether the target supports __sync_fetch_and_add],
- have_sync_fetch_and_add, [
- AC_TRY_LINK([int foovar = 0;], [
-if (foovar <= 0) return __sync_fetch_and_add (&foovar, 1);
-if (foovar > 10) return __sync_add_and_fetch (&foovar, -1);],
- have_sync_fetch_and_add=yes, have_sync_fetch_and_add=no)])
- if test $have_sync_fetch_and_add = yes; then
- AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD, 1,
- [Define to 1 if the target supports __sync_fetch_and_add])
- fi])
-
-dnl Check if threads are supported.
-AC_DEFUN([LIBGFOR_CHECK_GTHR_DEFAULT], [
- AC_CACHE_CHECK([configured target thread model],
- target_thread_file, [
-target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`])
-
- if test $target_thread_file != single; then
- AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
- [Define if the compiler has a thread header that is non single.])
+dnl Check whether the target supports __atomic_fetch_add.
+AC_DEFUN([LIBGFOR_CHECK_ATOMIC_FETCH_ADD], [
+ AC_CACHE_CHECK([whether the target supports __atomic_fetch_add],
+ libgfor_cv_have_atomic_fetch_add, [
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[int foovar = 0;]], [[
+if (foovar <= 0) return __atomic_fetch_add (&foovar, 1, __ATOMIC_ACQ_REL);
+if (foovar > 10) return __atomic_add_fetch (&foovar, -1, __ATOMIC_ACQ_REL);]])],
+ libgfor_cv_have_atomic_fetch_add=yes, libgfor_cv_have_atomic_fetch_add=no)])
+ if test $libgfor_cv_have_atomic_fetch_add = yes; then
+ AC_DEFINE(HAVE_ATOMIC_FETCH_ADD, 1,
+ [Define to 1 if the target supports __atomic_fetch_add])
fi])
dnl Check for pragma weak.
AC_DEFUN([LIBGFOR_GTHREAD_WEAK], [
AC_CACHE_CHECK([whether pragma weak works],
- have_pragma_weak, [
+ libgfor_cv_have_pragma_weak, [
gfor_save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Wunknown-pragmas"
- AC_TRY_COMPILE([void foo (void);
-#pragma weak foo], [if (foo) foo ();],
- have_pragma_weak=yes, have_pragma_weak=no)])
- if test $have_pragma_weak = yes; then
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+void foo (void);
+#pragma weak foo
+]], [[if (foo) foo ();]])],
+ libgfor_cv_have_pragma_weak=yes, libgfor_cv_have_pragma_weak=no)])
+ if test $libgfor_cv_have_pragma_weak = yes; then
AC_DEFINE(SUPPORTS_WEAK, 1,
[Define to 1 if the target supports #pragma weak])
fi
case "$host" in
- *-*-darwin* | *-*-hpux* | *-*-cygwin* | *-*-mingw* )
+ *-*-darwin* | *-*-hpux* | *-*-cygwin* | *-*-mingw* | *-*-musl* )
AC_DEFINE(GTHREAD_USE_WEAK, 0,
[Define to 0 if the target shouldn't use #pragma weak])
;;
esac])
+dnl Check whether target effectively supports weakref
+AC_DEFUN([LIBGFOR_CHECK_WEAKREF], [
+ AC_CACHE_CHECK([whether the target supports weakref],
+ libgfor_cv_have_weakref, [
+ save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS -Wunknown-pragmas -Werror"
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+static int mytoto (int) __attribute__((__weakref__("toto")));
+]], [[return (mytoto != 0);]])],
+ libgfor_cv_have_weakref=yes, libgfor_cv_have_weakref=no)
+ CFLAGS="$save_CFLAGS"])
+ if test $libgfor_cv_have_weakref = yes; then
+ AC_DEFINE(SUPPORTS_WEAKREF, 1,
+ [Define to 1 if the target supports weakref])
+ fi])
+
dnl Check whether target can unlink a file still open.
AC_DEFUN([LIBGFOR_CHECK_UNLINK_OPEN_FILE], [
AC_CACHE_CHECK([whether the target can unlink an open file],
- have_unlink_open_file, [
- AC_TRY_RUN([
+ libgfor_cv_have_unlink_open_file, [
+ AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
{
int fd;
- fd = open ("testfile", O_RDWR | O_CREAT, S_IWRITE | S_IREAD);
+ fd = open ("testfile", O_RDWR | O_CREAT, S_IWUSR | S_IRUSR);
if (fd <= 0)
return 0;
if (unlink ("testfile") == -1)
write (fd, "This is a test\n", 15);
close (fd);
- if (open ("testfile", O_RDONLY, S_IWRITE | S_IREAD) == -1 && errno == ENOENT)
+ if (open ("testfile", O_RDONLY) == -1 && errno == ENOENT)
return 0;
else
return 1;
-}], have_unlink_open_file=yes, have_unlink_open_file=no, [
+}]])], libgfor_cv_have_unlink_open_file=yes, libgfor_cv_have_unlink_open_file=no, [
case "${target}" in
- *mingw*) have_unlink_open_file=no ;;
- *) have_unlink_open_file=yes;;
+ *mingw*) libgfor_cv_have_unlink_open_file=no ;;
+ *) libgfor_cv_have_unlink_open_file=yes;;
esac])])
-if test x"$have_unlink_open_file" = xyes; then
+if test x"$libgfor_cv_have_unlink_open_file" = xyes; then
AC_DEFINE(HAVE_UNLINK_OPEN_FILE, 1, [Define if target can unlink open files.])
fi])
dnl Check whether CRLF is the line terminator
AC_DEFUN([LIBGFOR_CHECK_CRLF], [
AC_CACHE_CHECK([whether the target has CRLF as line terminator],
- have_crlf, [
- AC_TRY_RUN([
+ libgfor_cv_have_crlf, [
+ AC_RUN_IFELSE([AC_LANG_SOURCE([[
/* This test program should exit with status 0 if system uses a CRLF as
line terminator, and status 1 otherwise.
Since it is used to check for mingw systems, and should return 0 in any
else
exit(1);
#endif
-}], have_crlf=yes, have_crlf=no, [
+}]])], libgfor_cv_have_crlf=yes, libgfor_cv_have_crlf=no, [
case "${target}" in
- *mingw*) have_crlf=yes ;;
- *) have_crlf=no;;
+ *mingw*) libgfor_cv_have_crlf=yes ;;
+ *) libgfor_cv_have_crlf=no;;
esac])])
-if test x"$have_crlf" = xyes; then
+if test x"$libgfor_cv_have_crlf" = xyes; then
AC_DEFINE(HAVE_CRLF, 1, [Define if CRLF is line terminator.])
fi])
-dnl Check whether isfinite is broken.
-dnl The most common problem is that it does not work on long doubles.
-AC_DEFUN([LIBGFOR_CHECK_FOR_BROKEN_ISFINITE], [
- AC_CACHE_CHECK([whether isfinite is broken],
- have_broken_isfinite, [
- libgfor_check_for_broken_isfinite_save_LIBS=$LIBS
- LIBS="$LIBS -lm"
- AC_TRY_RUN([
-#ifdef HAVE_MATH_H
-#include <math.h>
-#endif
-#include <float.h>
-int main ()
-{
-#ifdef isfinite
-#ifdef LDBL_MAX
- if (!isfinite(LDBL_MAX)) return 1;
-#endif
-#ifdef DBL_MAX
- if (!isfinite(DBL_MAX)) return 1;
-#endif
-#endif
-return 0;
-}], have_broken_isfinite=no, have_broken_isfinite=yes, [
-case "${target}" in
- hppa*-*-hpux*) have_broken_isfinite=yes ;;
- *) have_broken_isfinite=no ;;
-esac])]
- LIBS=$libgfor_check_for_broken_isfinite_save_LIBS)
-if test x"$have_broken_isfinite" = xyes; then
- AC_DEFINE(HAVE_BROKEN_ISFINITE, 1, [Define if isfinite is broken.])
-fi])
-
-dnl Check whether isnan is broken.
-dnl The most common problem is that it does not work on long doubles.
-AC_DEFUN([LIBGFOR_CHECK_FOR_BROKEN_ISNAN], [
- AC_CACHE_CHECK([whether isnan is broken],
- have_broken_isnan, [
- libgfor_check_for_broken_isnan_save_LIBS=$LIBS
- LIBS="$LIBS -lm"
- AC_TRY_RUN([
-#ifdef HAVE_MATH_H
-#include <math.h>
-#endif
-#include <float.h>
-int main ()
-{
-#ifdef isnan
-#ifdef LDBL_MAX
- {
- long double x;
- x = __builtin_nanl ("");
- if (!isnan(x)) return 1;
- if (isnan(LDBL_MAX)) return 1;
-#ifdef NAN
- x = (long double) NAN;
- if (!isnan(x)) return 1;
-#endif
- }
-#endif
-#ifdef DBL_MAX
- {
- double y;
- y = __builtin_nan ("");
- if (!isnan(y)) return 1;
- if (isnan(DBL_MAX)) return 1;
-#ifdef NAN
- y = (double) NAN;
- if (!isnan(y)) return 1;
-#endif
- }
-#endif
-#endif
-return 0;
-}], have_broken_isnan=no, have_broken_isnan=yes, [
-case "${target}" in
- hppa*-*-hpux*) have_broken_isnan=yes ;;
- *) have_broken_isnan=no ;;
-esac])]
- LIBS=$libgfor_check_for_broken_isnan_save_LIBS)
-if test x"$have_broken_isnan" = xyes; then
- AC_DEFINE(HAVE_BROKEN_ISNAN, 1, [Define if isnan is broken.])
-fi])
-
-dnl Check whether fpclassify is broken.
-dnl The most common problem is that it does not work on long doubles.
-AC_DEFUN([LIBGFOR_CHECK_FOR_BROKEN_FPCLASSIFY], [
- AC_CACHE_CHECK([whether fpclassify is broken],
- have_broken_fpclassify, [
- libgfor_check_for_broken_fpclassify_save_LIBS=$LIBS
- LIBS="$LIBS -lm"
- AC_TRY_RUN([
-#ifdef HAVE_MATH_H
-#include <math.h>
-#endif
-#include <float.h>
-int main ()
-{
-#ifdef fpclassify
-#ifdef LDBL_MAX
- if (fpclassify(LDBL_MAX) == FP_NAN
- || fpclassify(LDBL_MAX) == FP_INFINITE) return 1;
-#endif
-#ifdef DBL_MAX
- if (fpclassify(DBL_MAX) == FP_NAN
- || fpclassify(DBL_MAX) == FP_INFINITE) return 1;
-#endif
-#endif
-return 0;
-}], have_broken_fpclassify=no, have_broken_fpclassify=yes, [
-case "${target}" in
- hppa*-*-hpux*) have_broken_fpclassify=yes ;;
- *) have_broken_fpclassify=no ;;
-esac])]
- LIBS=$libgfor_check_for_broken_fpclassify_save_LIBS)
-if test x"$have_broken_fpclassify" = xyes; then
- AC_DEFINE(HAVE_BROKEN_FPCLASSIFY, 1, [Define if fpclassify is broken.])
-fi])
-
dnl Check whether the st_ino and st_dev stat fields taken together uniquely
dnl identify the file within the system. This is should be true for POSIX
dnl systems; it is known to be false on mingw32.
AC_DEFUN([LIBGFOR_CHECK_WORKING_STAT], [
AC_CACHE_CHECK([whether the target stat is reliable],
- have_working_stat, [
- AC_TRY_RUN([
+ libgfor_cv_have_working_stat, [
+ AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
fclose(f);
fclose(g);
return 0;
-}], have_working_stat=yes, have_working_stat=no, [
+}]])], libgfor_cv_have_working_stat=yes, libgfor_cv_have_working_stat=no, [
case "${target}" in
- *mingw*) have_working_stat=no ;;
- *) have_working_stat=yes;;
+ *mingw*) libgfor_cv_have_working_stat=no ;;
+ *) libgfor_cv_have_working_stat=yes;;
esac])])
-if test x"$have_working_stat" = xyes; then
+if test x"$libgfor_cv_have_working_stat" = xyes; then
AC_DEFINE(HAVE_WORKING_STAT, 1, [Define if target has a reliable stat.])
fi])
dnl Checks for fpsetmask function.
AC_DEFUN([LIBGFOR_CHECK_FPSETMASK], [
- AC_CACHE_CHECK([whether fpsetmask is present], have_fpsetmask, [
- AC_TRY_LINK([
+ AC_CACHE_CHECK([whether fpsetmask is present], libgfor_cv_have_fpsetmask, [
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#if HAVE_FLOATINGPOINT_H
# include <floatingpoint.h>
#endif /* HAVE_FLOATINGPOINT_H */
#if HAVE_IEEEFP_H
# include <ieeefp.h>
-#endif /* HAVE_IEEEFP_H */],[fpsetmask(0);],
- eval "have_fpsetmask=yes", eval "have_fpsetmask=no")
+#endif /* HAVE_IEEEFP_H */]],[[fpsetmask(0);]])],
+ eval "libgfor_cv_have_fpsetmask=yes", eval "libgfor_cv_have_fpsetmask=no")
])
- if test x"$have_fpsetmask" = xyes; then
+ if test x"$libgfor_cv_have_fpsetmask" = xyes; then
+ have_fpsetmask=yes
AC_DEFINE(HAVE_FPSETMASK, 1, [Define if you have fpsetmask.])
fi
])
dnl Check whether we have a mingw that provides a __mingw_snprintf function
AC_DEFUN([LIBGFOR_CHECK_MINGW_SNPRINTF], [
- AC_CACHE_CHECK([whether __mingw_snprintf is present], have_mingw_snprintf, [
- AC_TRY_LINK([
+ AC_CACHE_CHECK([whether __mingw_snprintf is present], libgfor_cv_have_mingw_snprintf, [
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <stdio.h>
extern int __mingw_snprintf (char *, size_t, const char *, ...);
-],[
+]],[[
__mingw_snprintf (NULL, 0, "%d\n", 1);
-],
- eval "have_mingw_snprintf=yes", eval "have_mingw_snprintf=no")
+]])],
+ eval "libgfor_cv_have_mingw_snprintf=yes", eval "libgfor_cv_have_mingw_snprintf=no")
])
- if test x"$have_mingw_snprintf" = xyes; then
+ if test x"$libgfor_cv_have_mingw_snprintf" = xyes; then
AC_DEFINE(HAVE_MINGW_SNPRINTF, 1, [Define if you have __mingw_snprintf.])
fi
])
+
+dnl Check whether we have a __float128 type
+AC_DEFUN([LIBGFOR_CHECK_FLOAT128], [
+ LIBQUADSPEC=
+
+ if test "x$enable_libquadmath_support" != xno; then
+
+ AC_CACHE_CHECK([whether we have a usable __float128 type],
+ libgfor_cv_have_float128, [
+ GCC_TRY_COMPILE_OR_LINK([
+ typedef _Complex float __attribute__((mode(TC))) __complex128;
+
+ __float128 foo (__float128 x)
+ {
+
+ __complex128 z1, z2;
+
+ z1 = x;
+ z2 = x / 7.Q;
+ z2 /= z1;
+
+ return (__float128) z2;
+ }
+
+ __float128 bar (__float128 x)
+ {
+ return x * __builtin_huge_valq ();
+ }
+ ],[
+ foo (1.2Q);
+ bar (1.2Q);
+ ],[
+ libgfor_cv_have_float128=yes
+ ],[
+ libgfor_cv_have_float128=no
+])])
+
+ if test "x$libgfor_cv_have_float128" = xyes; then
+ AC_DEFINE(HAVE_FLOAT128, 1, [Define if have a usable __float128 type.])
+
+ dnl Check whether -Wl,--as-needed resp. -Wl,-zignore is supported
+ dnl
+ dnl Turn warnings into error to avoid testsuite breakage. So enable
+ dnl AC_LANG_WERROR, but there's currently (autoconf 2.64) no way to turn
+ dnl it off again. As a workaround, save and restore werror flag like
+ dnl AC_PATH_XTRA.
+ dnl Cf. http://gcc.gnu.org/ml/gcc-patches/2010-05/msg01889.html
+ ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag=$ac_[]_AC_LANG_ABBREV[]_werror_flag
+ AC_CACHE_CHECK([whether --as-needed/-z ignore works],
+ [libgfor_cv_have_as_needed],
+ [
+ # Test for native Solaris options first.
+ # No whitespace after -z to pass it through -Wl.
+ libgfor_cv_as_needed_option="-zignore"
+ libgfor_cv_no_as_needed_option="-zrecord"
+ save_LDFLAGS="$LDFLAGS"
+ LDFLAGS="$LDFLAGS -Wl,$libgfor_cv_as_needed_option -lm -Wl,$libgfor_cv_no_as_needed_option"
+ libgfor_cv_have_as_needed=no
+ AC_LANG_WERROR
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
+ [libgfor_cv_have_as_needed=yes],
+ [libgfor_cv_have_as_needed=no])
+ LDFLAGS="$save_LDFLAGS"
+ if test "x$libgfor_cv_have_as_needed" = xno; then
+ libgfor_cv_as_needed_option="--as-needed"
+ libgfor_cv_no_as_needed_option="--no-as-needed"
+ save_LDFLAGS="$LDFLAGS"
+ LDFLAGS="$LDFLAGS -Wl,$libgfor_cv_as_needed_option -lm -Wl,$libgfor_cv_no_as_needed_option"
+ libgfor_cv_have_as_needed=no
+ AC_LANG_WERROR
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
+ [libgfor_cv_have_as_needed=yes],
+ [libgfor_cv_have_as_needed=no])
+ LDFLAGS="$save_LDFLAGS"
+ fi
+ ac_[]_AC_LANG_ABBREV[]_werror_flag=$ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag
+ ])
+
+ dnl For static libgfortran linkage, depend on libquadmath only if needed.
+ if test "x$libgfor_cv_have_as_needed" = xyes; then
+ LIBQUADSPEC="%{static-libgfortran:$libgfor_cv_as_needed_option} -lquadmath %{static-libgfortran:$libgfor_cv_no_as_needed_option}"
+ else
+ LIBQUADSPEC="-lquadmath"
+ fi
+ if test -f ../libquadmath/libquadmath.la; then
+ LIBQUADLIB=../libquadmath/libquadmath.la
+ LIBQUADLIB_DEP=../libquadmath/libquadmath.la
+ LIBQUADINCLUDE='-I$(srcdir)/../libquadmath'
+ else
+ LIBQUADLIB="-lquadmath"
+ LIBQUADLIB_DEP=
+ LIBQUADINCLUDE=
+ fi
+ fi
+ else
+ # for --disable-quadmath
+ LIBQUADLIB=
+ LIBQUADLIB_DEP=
+ LIBQUADINCLUDE=
+ fi
+
+ dnl For the spec file
+ AC_SUBST(LIBQUADSPEC)
+ AC_SUBST(LIBQUADLIB)
+ AC_SUBST(LIBQUADLIB_DEP)
+ AC_SUBST(LIBQUADINCLUDE)
+
+ dnl We need a conditional for the Makefile
+ AM_CONDITIONAL(LIBGFOR_BUILD_QUAD, [test "x$libgfor_cv_have_float128" = xyes])
+])
+
+
+dnl Check whether we have strerror_r
+AC_DEFUN([LIBGFOR_CHECK_STRERROR_R], [
+ dnl Check for three-argument POSIX version of strerror_r
+ ac_save_CFLAGS="$CFLAGS"
+ CFLAGS="-Wimplicit-function-declaration -Werror"
+ AC_TRY_COMPILE([#define _GNU_SOURCE 1
+ #include <string.h>
+ #include <locale.h>],
+ [char s[128]; strerror_r(5, s, 128);],
+ AC_DEFINE(HAVE_STRERROR_R, 1,
+ [Define if strerror_r is available in <string.h>.]),)
+ CFLAGS="$ac_save_CFLAGS"
+
+ dnl Check for two-argument version of strerror_r (e.g. for VxWorks)
+ ac_save_CFLAGS="$CFLAGS"
+ CFLAGS="-Wimplicit-function-declaration -Werror"
+ AC_TRY_COMPILE([#define _GNU_SOURCE 1
+ #include <string.h>
+ #include <locale.h>],
+ [char s[128]; strerror_r(5, s);],
+ AC_DEFINE(HAVE_STRERROR_R_2ARGS, 1,
+ [Define if strerror_r takes two arguments and is available in <string.h>.]),)
+ CFLAGS="$ac_save_CFLAGS"
+])
+
+dnl Check for AVX
+
+AC_DEFUN([LIBGFOR_CHECK_AVX], [
+ ac_save_CFLAGS="$CFLAGS"
+ CFLAGS="-O2 -mavx"
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+ void _mm256_zeroall (void)
+ {
+ __builtin_ia32_vzeroall ();
+ }]], [[]])],
+ AC_DEFINE(HAVE_AVX, 1,
+ [Define if AVX instructions can be compiled.]),
+ [])
+ CFLAGS="$ac_save_CFLAGS"
+])
+
+dnl Check for AVX2
+
+AC_DEFUN([LIBGFOR_CHECK_AVX2], [
+ ac_save_CFLAGS="$CFLAGS"
+ CFLAGS="-O2 -mavx2"
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+ typedef long long __v4di __attribute__ ((__vector_size__ (32)));
+ __v4di
+ mm256_is32_andnotsi256 (__v4di __X, __v4di __Y)
+ {
+ return __builtin_ia32_andnotsi256 (__X, __Y);
+ }]], [[]])],
+ AC_DEFINE(HAVE_AVX2, 1,
+ [Define if AVX2 instructions can be compiled.]),
+ [])
+ CFLAGS="$ac_save_CFLAGS"
+])
+
+dnl Check for AVX512f
+
+AC_DEFUN([LIBGFOR_CHECK_AVX512F], [
+ ac_save_CFLAGS="$CFLAGS"
+ CFLAGS="-O2 -mavx512f"
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+ typedef double __m512d __attribute__ ((__vector_size__ (64)));
+ __m512d _mm512_add (__m512d a)
+ {
+ __m512d b = __builtin_ia32_addpd512_mask (a, a, a, 1, 4);
+ /* For -m64/-mx32 also verify that code will work even if
+ the target uses call saved zmm16+ and needs to emit
+ unwind info for them (e.g. on mingw). See PR79127. */
+#ifdef __x86_64__
+ asm volatile ("" : : : "zmm16", "zmm17", "zmm18", "zmm19");
+#endif
+ return b;
+ }]], [[]])],
+ AC_DEFINE(HAVE_AVX512F, 1,
+ [Define if AVX512f instructions can be compiled.]),
+ [])
+ CFLAGS="$ac_save_CFLAGS"
+])
+
+dnl Check for FMA3
+dnl
+AC_DEFUN([LIBGFOR_CHECK_FMA3], [
+ ac_save_CFLAGS="$CFLAGS"
+ CFLAGS="-O2 -mfma -mno-fma4"
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+ typedef float __m128 __attribute__ ((__vector_size__ (16)));
+ typedef float __v4sf __attribute__ ((__vector_size__ (16)));
+ __m128 _mm_macc_ps(__m128 __A, __m128 __B, __m128 __C)
+ {
+ return (__m128) __builtin_ia32_vfmaddps ((__v4sf)__A,
+ (__v4sf)__B,
+ (__v4sf)__C);
+ }]], [[]])],
+ AC_DEFINE(HAVE_FMA3, 1,
+ [Define if FMA3 instructions can be compiled.]),
+ [])
+ CFLAGS="$ac_save_CFLAGS"
+])
+
+dnl Check for FMA4
+dnl
+AC_DEFUN([LIBGFOR_CHECK_FMA4], [
+ ac_save_CFLAGS="$CFLAGS"
+ CFLAGS="-O2 -mfma4 -mno-fma"
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+ typedef float __m128 __attribute__ ((__vector_size__ (16)));
+ typedef float __v4sf __attribute__ ((__vector_size__ (16)));
+ __m128 _mm_macc_ps(__m128 __A, __m128 __B, __m128 __C)
+ {
+ return (__m128) __builtin_ia32_vfmaddps ((__v4sf)__A,
+ (__v4sf)__B,
+ (__v4sf)__C);
+ }]], [[]])],
+ AC_DEFINE(HAVE_FMA4, 1,
+ [Define if FMA4 instructions can be compiled.]),
+ [])
+ CFLAGS="$ac_save_CFLAGS"
+])
+
+dnl Check for -mprefer-avx128
+dnl This also defines an automake conditional.
+AC_DEFUN([LIBGFOR_CHECK_AVX128], [
+ ac_save_CFLAGS="$CFLAGS"
+ CFLAGS="-O2 -mavx -mprefer-avx128"
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+ void foo()
+ {
+ }]], [[]])],
+ AC_DEFINE(HAVE_AVX128, 1,
+ [Define if -mprefer-avx128 is supported.])
+ AM_CONDITIONAL([HAVE_AVX128],true),
+ [AM_CONDITIONAL([HAVE_AVX128],false)])
+ CFLAGS="$ac_save_CFLAGS"
+])
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