gcc/libgfortran/acinclude.m4

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m4_include(../config/acx.m4)
m4_include(../config/no-executables.m4)
dnl Check:
dnl * If we have gettimeofday;
dnl * If we have struct timezone for use in calling it;
dnl * If calling it with a timezone pointer actually works -- this is deemed
dnl obsolete or undefined on some systems which say you should use a null
dnl pointer -- and undefine HAVE_TIMEZONE if so;
dnl * Whether it only takes one arg.
AC_DEFUN([LIBGFOR_GETTIMEOFDAY], [
AC_CHECK_FUNCS(gettimeofday)
if test "$ac_cv_func_gettimeofday" = yes; then
AC_CACHE_CHECK([for struct timezone], gfor_cv_struct_timezone,
[AC_TRY_COMPILE([#include <sys/time.h>],
[struct timezone tz;],
gfor_cv_struct_timezone=yes, gfor_cv_struct_timezone=no)])
if test $gfor_cv_struct_timezone = yes; then
dnl It may be that we can't call gettimeofday with a non-null pointer.
dnl In that case we'll lie about struct timezone.
AC_TRY_RUN([
#ifdef TIME_WITH_SYS_TIME
#include <sys/time.h>
#include <time.h>
#else
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#else
#include <time.h>
#endif
#endif
main ()
{
struct timeval time;
struct timezone dummy;
if (gettimeofday (&time, &dummy))
exit (1);
else
exit (0);
}],
[gfor_have_struct_timezone=yes], [gfor_have_struct_timezone=no],
[gfor_have_struct_timezone=yes])
if test $gfor_have_struct_timezone = yes; then
AC_DEFINE(HAVE_TIMEZONE, 1, [Do we have struct timezone])
fi
fi
AC_REQUIRE([AC_HEADER_TIME])
AC_CACHE_CHECK([whether gettimeofday can accept two arguments],
emacs_cv_gettimeofday_two_arguments,
[AC_TRY_LINK([
#ifdef TIME_WITH_SYS_TIME
#include <sys/time.h>
#include <time.h>
#else
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#else
#include <time.h>
#endif
#endif
],
[
struct timeval time;
#ifdef HAVE_TIMEZONE
struct timezone dummy;
#define DUMMY &dummy
#else
#define DUMMY NULL
#endif
gettimeofday (&time, DUMMY);],
emacs_cv_gettimeofday_two_arguments=yes,
emacs_cv_gettimeofday_two_arguments=no)])
if test $emacs_cv_gettimeofday_two_arguments = no; then
AC_DEFINE(GETTIMEOFDAY_ONE_ARGUMENT, 1,
[Does gettimeofday take a single argument])
fi
fi])
sinclude(../libtool.m4)
dnl The lines below arrange for aclocal not to bring an installed
dnl libtool.m4 into aclocal.m4, while still arranging for automake to
dnl add a definition of LIBTOOL to Makefile.in.
ifelse(,,,[AC_SUBST(LIBTOOL)
AC_DEFUN([AM_PROG_LIBTOOL])
AC_DEFUN([AC_LIBTOOL_DLOPEN])
AC_DEFUN([AC_PROG_LD])
])
dnl Check whether the target is ILP32.
AC_DEFUN([LIBGFOR_TARGET_ILP32], [
AC_CACHE_CHECK([whether the target is ILP32], target_ilp32, [
save_CFLAGS="$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 $target_ilp32 = yes; then
AC_DEFINE(TARGET_ILP32, 1,
[Define to 1 if the target is ILP32.])
fi
])
dnl Check whether the target supports hidden visibility.
AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_VISIBILITY], [
AC_CACHE_CHECK([whether the target supports hidden visibility],
have_attribute_visibility, [
save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Werror"
AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
[], have_attribute_visibility=yes,
have_attribute_visibility=no)
CFLAGS="$save_CFLAGS"])
if test $have_attribute_visibility = yes; then
AC_DEFINE(HAVE_ATTRIBUTE_VISIBILITY, 1,
[Define to 1 if the target supports __attribute__((visibility(...))).])
fi])
dnl Check whether the target supports dllexport
AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_DLLEXPORT], [
AC_CACHE_CHECK([whether the target supports dllexport],
have_attribute_dllexport, [
save_CFLAGS="$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([
#define ULP STR1(__USER_LABEL_PREFIX__)
#define STR1(x) STR2(x)
#define STR2(x) #x
void foo(void) { }
extern void bar(void) __attribute__((alias(ULP "foo")));],
[bar();], have_attribute_alias=yes, have_attribute_alias=no)])
if test $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 $target_thread_file != single; then
AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
[Define if the compiler has a thread header that is non single.])
fi])
dnl Check for pragma weak.
AC_DEFUN([LIBGFOR_GTHREAD_WEAK], [
AC_CACHE_CHECK([whether pragma weak works],
have_pragma_weak, [
gfor_save_CFLAGS="$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 $have_pragma_weak = yes; then
AC_DEFINE(SUPPORTS_WEAK, 1,
[Define to 1 if the target supports #pragma weak])
fi
case "$host" in
*-*-darwin* | *-*-hpux* | *-*-cygwin*)
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],
have_unlink_open_file, [
AC_TRY_RUN([
#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_IWRITE | S_IREAD);
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, S_IWRITE | S_IREAD) == -1 && errno == ENOENT)
return 0;
else
return 1;
}], have_unlink_open_file=yes, have_unlink_open_file=no, [
case "${target}" in
*mingw*) have_unlink_open_file=no ;;
*) have_unlink_open_file=yes;;
esac])])
if test x"$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([
/* 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
}], have_crlf=yes, have_crlf=no, [
case "${target}" in
*mingw*) have_crlf=yes ;;
*) have_crlf=no;;
esac])])
if test x"$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"$have_broken_fpclassify" = xyes; then
AC_DEFINE(HAVE_BROKEN_FPCLASSIFY, 1, [Define if fpclassify is broken.])
fi])
dnl Check whether the st_ino and st_dev stat fields taken together uniquely
dnl identify the file within the system. This is should be true for POSIX
dnl systems; it is known to be false on mingw32.
AC_DEFUN([LIBGFOR_CHECK_WORKING_STAT], [
AC_CACHE_CHECK([whether the target stat is reliable],
have_working_stat, [
AC_TRY_RUN([
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
int main ()
{
FILE *f, *g;
struct stat st1, st2;
f = fopen ("foo", "w");
g = fopen ("bar", "w");
if (stat ("foo", &st1) != 0 || stat ("bar", &st2))
return 1;
if (st1.st_dev == st2.st_dev && st1.st_ino == st2.st_ino)
return 1;
fclose(f);
fclose(g);
return 0;
}], have_working_stat=yes, have_working_stat=no, [
case "${target}" in
*mingw*) have_working_stat=no ;;
*) have_working_stat=yes;;
esac])])
if test x"$have_working_stat" = xyes; then
AC_DEFINE(HAVE_WORKING_STAT, 1, [Define if target has a reliable stat.])
fi])
dnl Checks for fpsetmask function.
AC_DEFUN([LIBGFOR_CHECK_FPSETMASK], [
AC_CACHE_CHECK([whether fpsetmask is present], have_fpsetmask, [
AC_TRY_LINK([
#if HAVE_FLOATINGPOINT_H
# include <floatingpoint.h>
#endif /* HAVE_FLOATINGPOINT_H */
#if HAVE_IEEEFP_H
# include <ieeefp.h>
#endif /* HAVE_IEEEFP_H */],[fpsetmask(0);],
eval "have_fpsetmask=yes", eval "have_fpsetmask=no")
])
if test x"$have_fpsetmask" = xyes; then
AC_DEFINE(HAVE_FPSETMASK, 1, [Define if you have fpsetmask.])
fi
])