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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgfortran/] [acinclude.m4] - Rev 779
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m4_include(../config/acx.m4) m4_include(../config/no-executables.m4) dnl Check that we have a working GNU Fortran compiler AC_DEFUN([LIBGFOR_WORKING_GFORTRAN], [ AC_MSG_CHECKING([whether the GNU Fortran compiler is working]) AC_LANG_PUSH([Fortran]) AC_COMPILE_IFELSE([[ program foo real, parameter :: bar = sin (12.34 / 2.5) end program foo]], [AC_MSG_RESULT([yes])], [AC_MSG_RESULT([no]) AC_MSG_ERROR([GNU Fortran is not working; please report a bug in http://gcc.gnu.org/bugzilla, attaching $PWD/config.log]) ]) AC_LANG_POP([Fortran]) ]) sinclude(../libtool.m4) dnl The lines below arrange for aclocal not to bring an installed dnl libtool.m4 into aclocal.m4, while still arranging for automake to dnl add a definition of LIBTOOL to Makefile.in. ifelse(,,,[AC_SUBST(LIBTOOL) AC_DEFUN([AM_PROG_LIBTOOL]) AC_DEFUN([AC_LIBTOOL_DLOPEN]) AC_DEFUN([AC_PROG_LD]) ]) dnl Check whether the target supports hidden visibility. AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_VISIBILITY], [ AC_CACHE_CHECK([whether the target supports hidden visibility], libgfor_cv_have_attribute_visibility, [ save_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS -Werror" AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[void __attribute__((visibility("hidden"))) foo(void) { }]], [])], libgfor_cv_have_attribute_visibility=yes, libgfor_cv_have_attribute_visibility=no) CFLAGS="$save_CFLAGS"]) if test $libgfor_cv_have_attribute_visibility = yes; then AC_DEFINE(HAVE_ATTRIBUTE_VISIBILITY, 1, [Define to 1 if the target supports __attribute__((visibility(...))).]) fi]) dnl Check whether the target supports dllexport AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_DLLEXPORT], [ AC_CACHE_CHECK([whether the target supports dllexport], libgfor_cv_have_attribute_dllexport, [ save_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS -Werror" AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[void __attribute__((dllexport)) foo(void) { }]], [])], libgfor_cv_have_attribute_dllexport=yes, libgfor_cv_have_attribute_dllexport=no) CFLAGS="$save_CFLAGS"]) if test $libgfor_cv_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], libgfor_cv_have_attribute_alias, [ AC_LINK_IFELSE([AC_LANG_PROGRAM([[ void foo(void) { } 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], libgfor_cv_have_sync_fetch_and_add, [ AC_LINK_IFELSE([AC_LANG_PROGRAM([[int foovar = 0;]], [[ if (foovar <= 0) return __sync_fetch_and_add (&foovar, 1); if (foovar > 10) return __sync_add_and_fetch (&foovar, -1);]])], libgfor_cv_have_sync_fetch_and_add=yes, libgfor_cv_have_sync_fetch_and_add=no)]) if test $libgfor_cv_have_sync_fetch_and_add = yes; then AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD, 1, [Define to 1 if the target supports __sync_fetch_and_add]) fi]) dnl Check for pragma weak. AC_DEFUN([LIBGFOR_GTHREAD_WEAK], [ AC_CACHE_CHECK([whether pragma weak works], libgfor_cv_have_pragma_weak, [ gfor_save_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS -Wunknown-pragmas" 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* | alpha*-dec-osf* ) AC_DEFINE(GTHREAD_USE_WEAK, 0, [Define to 0 if the target shouldn't use #pragma weak]) ;; esac]) 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], libgfor_cv_have_unlink_open_file, [ AC_RUN_IFELSE([AC_LANG_SOURCE([[ #include <errno.h> #include <fcntl.h> #include <unistd.h> #include <sys/stat.h> int main () { int fd; fd = open ("testfile", O_RDWR | O_CREAT, S_IWUSR | S_IRUSR); if (fd <= 0) return 0; if (unlink ("testfile") == -1) return 1; write (fd, "This is a test\n", 15); close (fd); if (open ("testfile", O_RDONLY) == -1 && errno == ENOENT) return 0; else return 1; }]])], libgfor_cv_have_unlink_open_file=yes, libgfor_cv_have_unlink_open_file=no, [ case "${target}" in *mingw*) libgfor_cv_have_unlink_open_file=no ;; *) libgfor_cv_have_unlink_open_file=yes;; esac])]) if test x"$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], 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 other case, in case of a failure we will not use CRLF. */ #include <sys/stat.h> #include <stdlib.h> #include <fcntl.h> #include <stdio.h> int main () { #ifndef O_BINARY exit(1); #else int fd, bytes; char buff[5]; fd = open ("foo", O_WRONLY | O_CREAT | O_TRUNC, S_IRWXU); if (fd < 0) exit(1); if (write (fd, "\n", 1) < 0) perror ("write"); close (fd); if ((fd = open ("foo", O_RDONLY | O_BINARY, S_IRWXU)) < 0) exit(1); bytes = read (fd, buff, 5); if (bytes == 2 && buff[0] == '\r' && buff[1] == '\n') exit(0); else exit(1); #endif }]])], libgfor_cv_have_crlf=yes, libgfor_cv_have_crlf=no, [ case "${target}" in *mingw*) libgfor_cv_have_crlf=yes ;; *) libgfor_cv_have_crlf=no;; esac])]) if test x"$libgfor_cv_have_crlf" = xyes; then AC_DEFINE(HAVE_CRLF, 1, [Define if CRLF is line terminator.]) 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], libgfor_cv_have_working_stat, [ AC_RUN_IFELSE([AC_LANG_SOURCE([[ #include <stdio.h> #include <sys/types.h> #include <sys/stat.h> #include <unistd.h> int main () { FILE *f, *g; struct stat st1, st2; f = fopen ("foo", "w"); g = fopen ("bar", "w"); if (stat ("foo", &st1) != 0 || stat ("bar", &st2)) return 1; if (st1.st_dev == st2.st_dev && st1.st_ino == st2.st_ino) return 1; fclose(f); fclose(g); return 0; }]])], libgfor_cv_have_working_stat=yes, libgfor_cv_have_working_stat=no, [ case "${target}" in *mingw*) libgfor_cv_have_working_stat=no ;; *) libgfor_cv_have_working_stat=yes;; esac])]) if test x"$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], 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 "libgfor_cv_have_fpsetmask=yes", eval "libgfor_cv_have_fpsetmask=no") ]) if test x"$libgfor_cv_have_fpsetmask" = xyes; then have_fpsetmask=yes AC_DEFINE(HAVE_FPSETMASK, 1, [Define if you have fpsetmask.]) fi ]) dnl Check whether we have a mingw that provides a __mingw_snprintf function AC_DEFUN([LIBGFOR_CHECK_MINGW_SNPRINTF], [ AC_CACHE_CHECK([whether __mingw_snprintf is present], libgfor_cv_have_mingw_snprintf, [ AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include <stdio.h> extern int __mingw_snprintf (char *, size_t, const char *, ...); ]],[[ __mingw_snprintf (NULL, 0, "%d\n", 1); ]])], eval "libgfor_cv_have_mingw_snprintf=yes", eval "libgfor_cv_have_mingw_snprintf=no") ]) if test x"$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 broken powf implementation AC_DEFUN([LIBGFOR_CHECK_FOR_BROKEN_POWF], [ AC_CACHE_CHECK([whether powf is broken], libgfor_cv_have_broken_powf, [ case "${target}" in hppa*64*-*-hpux*) libgfor_cv_have_broken_powf=yes ;; *) libgfor_cv_have_broken_powf=no;; esac]) if test x"$libgfor_cv_have_broken_powf" = xyes; then AC_DEFINE(HAVE_BROKEN_POWF, 1, [Define if powf is broken.]) 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 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=$ac_[]_AC_LANG_ABBREV[]_werror_flag AC_CACHE_CHECK([whether --as-needed works], [libgfor_cv_have_as_needed], [ save_LDFLAGS="$LDFLAGS" LDFLAGS="$LDFLAGS -Wl,--as-needed -lm -Wl,--no-as-needed" libgfor_cv_have_as_needed=no AC_LANG_WERROR AC_LINK_IFELSE([AC_LANG_PROGRAM([])], [libgfor_cv_have_as_needed=yes], [libgfor_cv_have_as_needed=no]) LDFLAGS="$save_LDFLAGS" 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:--as-needed} -lquadmath %{static-libgfortran:--no-as-needed}" 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]) ])
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