16a314a996
* acinclude.m4 (HAVE_ATTRIBUTE_ALIAS): Remove __USER_LABEL_PREFIX__ from test. * configure: Regenerate. From-SVN: r117488
448 lines
13 KiB
Plaintext
448 lines
13 KiB
Plaintext
m4_include(../config/acx.m4)
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m4_include(../config/no-executables.m4)
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dnl Check:
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dnl * If we have gettimeofday;
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dnl * If we have struct timezone for use in calling it;
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dnl * If calling it with a timezone pointer actually works -- this is deemed
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dnl obsolete or undefined on some systems which say you should use a null
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dnl pointer -- and undefine HAVE_TIMEZONE if so;
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dnl * Whether it only takes one arg.
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AC_DEFUN([LIBGFOR_GETTIMEOFDAY], [
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AC_CHECK_FUNCS(gettimeofday)
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if test "$ac_cv_func_gettimeofday" = yes; then
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AC_CACHE_CHECK([for struct timezone], gfor_cv_struct_timezone,
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[AC_TRY_COMPILE([#include <sys/time.h>],
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[struct timezone tz;],
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gfor_cv_struct_timezone=yes, gfor_cv_struct_timezone=no)])
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if test $gfor_cv_struct_timezone = yes; then
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dnl It may be that we can't call gettimeofday with a non-null pointer.
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dnl In that case we'll lie about struct timezone.
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AC_TRY_RUN([
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#ifdef TIME_WITH_SYS_TIME
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#include <sys/time.h>
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#include <time.h>
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#else
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#ifdef HAVE_SYS_TIME_H
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#include <sys/time.h>
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#else
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#include <time.h>
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#endif
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#endif
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main ()
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{
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struct timeval time;
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struct timezone dummy;
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if (gettimeofday (&time, &dummy))
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exit (1);
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else
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exit (0);
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}],
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[gfor_have_struct_timezone=yes], [gfor_have_struct_timezone=no],
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[gfor_have_struct_timezone=yes])
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if test $gfor_have_struct_timezone = yes; then
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AC_DEFINE(HAVE_TIMEZONE, 1, [Do we have struct timezone])
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fi
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fi
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AC_REQUIRE([AC_HEADER_TIME])
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AC_CACHE_CHECK([whether gettimeofday can accept two arguments],
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emacs_cv_gettimeofday_two_arguments,
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[AC_TRY_LINK([
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#ifdef TIME_WITH_SYS_TIME
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#include <sys/time.h>
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#include <time.h>
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#else
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#ifdef HAVE_SYS_TIME_H
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#include <sys/time.h>
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#else
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#include <time.h>
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#endif
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#endif
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],
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[
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struct timeval time;
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#ifdef HAVE_TIMEZONE
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struct timezone dummy;
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#define DUMMY &dummy
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#else
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#define DUMMY NULL
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#endif
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gettimeofday (&time, DUMMY);],
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emacs_cv_gettimeofday_two_arguments=yes,
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emacs_cv_gettimeofday_two_arguments=no)])
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if test $emacs_cv_gettimeofday_two_arguments = no; then
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AC_DEFINE(GETTIMEOFDAY_ONE_ARGUMENT, 1,
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[Does gettimeofday take a single argument])
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fi
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fi])
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sinclude(../libtool.m4)
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dnl The lines below arrange for aclocal not to bring an installed
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dnl libtool.m4 into aclocal.m4, while still arranging for automake to
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dnl add a definition of LIBTOOL to Makefile.in.
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ifelse(,,,[AC_SUBST(LIBTOOL)
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AC_DEFUN([AM_PROG_LIBTOOL])
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AC_DEFUN([AC_LIBTOOL_DLOPEN])
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AC_DEFUN([AC_PROG_LD])
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])
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dnl Check whether the target is ILP32.
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AC_DEFUN([LIBGFOR_TARGET_ILP32], [
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AC_CACHE_CHECK([whether the target is ILP32], target_ilp32, [
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save_CFLAGS="$CFLAGS"
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CFLAGS="-O2"
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AC_TRY_LINK(,[
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if (sizeof(int) == 4 && sizeof(long) == 4 && sizeof(void *) == 4)
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;
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else
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undefined_function ();
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],
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target_ilp32=yes,
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target_ilp32=no)
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CFLAGS="$save_CFLAGS"])
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if test $target_ilp32 = yes; then
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AC_DEFINE(TARGET_ILP32, 1,
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[Define to 1 if the target is ILP32.])
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fi
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])
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dnl Check whether the target supports hidden visibility.
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AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_VISIBILITY], [
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AC_CACHE_CHECK([whether the target supports hidden visibility],
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have_attribute_visibility, [
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save_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -Werror"
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AC_TRY_COMPILE([void __attribute__((visibility("hidden"))) foo(void) { }],
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[], have_attribute_visibility=yes,
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have_attribute_visibility=no)
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CFLAGS="$save_CFLAGS"])
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if test $have_attribute_visibility = yes; then
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AC_DEFINE(HAVE_ATTRIBUTE_VISIBILITY, 1,
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[Define to 1 if the target supports __attribute__((visibility(...))).])
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fi])
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dnl Check whether the target supports dllexport
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AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_DLLEXPORT], [
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AC_CACHE_CHECK([whether the target supports dllexport],
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have_attribute_dllexport, [
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save_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -Werror"
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AC_TRY_COMPILE([void __attribute__((dllexport)) foo(void) { }],
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[], have_attribute_dllexport=yes,
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have_attribute_dllexport=no)
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CFLAGS="$save_CFLAGS"])
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if test $have_attribute_dllexport = yes; then
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AC_DEFINE(HAVE_ATTRIBUTE_DLLEXPORT, 1,
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[Define to 1 if the target supports __attribute__((dllexport)).])
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fi])
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dnl Check whether the target supports symbol aliases.
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AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_ALIAS], [
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AC_CACHE_CHECK([whether the target supports symbol aliases],
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have_attribute_alias, [
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AC_TRY_LINK([
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void foo(void) { }
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extern void bar(void) __attribute__((alias("foo")));],
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[bar();], have_attribute_alias=yes, have_attribute_alias=no)])
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if test $have_attribute_alias = yes; then
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AC_DEFINE(HAVE_ATTRIBUTE_ALIAS, 1,
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[Define to 1 if the target supports __attribute__((alias(...))).])
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fi])
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dnl Check whether the target supports __sync_fetch_and_add.
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AC_DEFUN([LIBGFOR_CHECK_SYNC_FETCH_AND_ADD], [
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AC_CACHE_CHECK([whether the target supports __sync_fetch_and_add],
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have_sync_fetch_and_add, [
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AC_TRY_LINK([int foovar = 0;], [
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if (foovar <= 0) return __sync_fetch_and_add (&foovar, 1);
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if (foovar > 10) return __sync_add_and_fetch (&foovar, -1);],
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have_sync_fetch_and_add=yes, have_sync_fetch_and_add=no)])
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if test $have_sync_fetch_and_add = yes; then
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AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD, 1,
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[Define to 1 if the target supports __sync_fetch_and_add])
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fi])
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dnl Check if threads are supported.
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AC_DEFUN([LIBGFOR_CHECK_GTHR_DEFAULT], [
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AC_CACHE_CHECK([configured target thread model],
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target_thread_file, [
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target_thread_file=`$CC -v 2>&1 | sed -n 's/^Thread model: //p'`])
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if test $target_thread_file != single; then
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AC_DEFINE(HAVE_GTHR_DEFAULT, 1,
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[Define if the compiler has a thread header that is non single.])
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fi])
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dnl Check for pragma weak.
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AC_DEFUN([LIBGFOR_GTHREAD_WEAK], [
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AC_CACHE_CHECK([whether pragma weak works],
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have_pragma_weak, [
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gfor_save_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS -Wunknown-pragmas"
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AC_TRY_COMPILE([void foo (void);
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#pragma weak foo], [if (foo) foo ();],
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have_pragma_weak=yes, have_pragma_weak=no)])
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if test $have_pragma_weak = yes; then
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AC_DEFINE(SUPPORTS_WEAK, 1,
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[Define to 1 if the target supports #pragma weak])
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fi
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case "$host" in
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*-*-darwin* | *-*-hpux* | *-*-cygwin*)
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AC_DEFINE(GTHREAD_USE_WEAK, 0,
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[Define to 0 if the target shouldn't use #pragma weak])
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;;
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esac])
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dnl Check whether target can unlink a file still open.
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AC_DEFUN([LIBGFOR_CHECK_UNLINK_OPEN_FILE], [
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AC_CACHE_CHECK([whether the target can unlink an open file],
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have_unlink_open_file, [
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AC_TRY_RUN([
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#include <errno.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <sys/stat.h>
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int main ()
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{
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int fd;
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fd = open ("testfile", O_RDWR | O_CREAT, S_IWRITE | S_IREAD);
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if (fd <= 0)
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return 0;
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if (unlink ("testfile") == -1)
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return 1;
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write (fd, "This is a test\n", 15);
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close (fd);
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if (open ("testfile", O_RDONLY, S_IWRITE | S_IREAD) == -1 && errno == ENOENT)
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return 0;
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else
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return 1;
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}], have_unlink_open_file=yes, have_unlink_open_file=no, [
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case "${target}" in
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*mingw*) have_unlink_open_file=no ;;
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*) have_unlink_open_file=yes;;
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esac])])
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if test x"$have_unlink_open_file" = xyes; then
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AC_DEFINE(HAVE_UNLINK_OPEN_FILE, 1, [Define if target can unlink open files.])
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fi])
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dnl Check whether CRLF is the line terminator
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AC_DEFUN([LIBGFOR_CHECK_CRLF], [
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AC_CACHE_CHECK([whether the target has CRLF as line terminator],
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have_crlf, [
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AC_TRY_RUN([
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/* This test program should exit with status 0 if system uses a CRLF as
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line terminator, and status 1 otherwise.
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Since it is used to check for mingw systems, and should return 0 in any
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other case, in case of a failure we will not use CRLF. */
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#include <sys/stat.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <stdio.h>
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int main ()
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{
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#ifndef O_BINARY
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exit(1);
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#else
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int fd, bytes;
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char buff[5];
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fd = open ("foo", O_WRONLY | O_CREAT | O_TRUNC, S_IRWXU);
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if (fd < 0)
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exit(1);
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if (write (fd, "\n", 1) < 0)
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perror ("write");
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close (fd);
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if ((fd = open ("foo", O_RDONLY | O_BINARY, S_IRWXU)) < 0)
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exit(1);
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bytes = read (fd, buff, 5);
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if (bytes == 2 && buff[0] == '\r' && buff[1] == '\n')
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exit(0);
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else
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exit(1);
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#endif
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}], have_crlf=yes, have_crlf=no, [
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case "${target}" in
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*mingw*) have_crlf=yes ;;
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*) have_crlf=no;;
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esac])])
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if test x"$have_crlf" = xyes; then
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AC_DEFINE(HAVE_CRLF, 1, [Define if CRLF is line terminator.])
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fi])
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dnl Check whether isfinite is broken.
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dnl The most common problem is that it does not work on long doubles.
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AC_DEFUN([LIBGFOR_CHECK_FOR_BROKEN_ISFINITE], [
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AC_CACHE_CHECK([whether isfinite is broken],
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have_broken_isfinite, [
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libgfor_check_for_broken_isfinite_save_LIBS=$LIBS
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LIBS="$LIBS -lm"
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AC_TRY_RUN([
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#ifdef HAVE_MATH_H
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#include <math.h>
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#endif
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#include <float.h>
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int main ()
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{
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#ifdef isfinite
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#ifdef LDBL_MAX
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if (!isfinite(LDBL_MAX)) return 1;
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#endif
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#ifdef DBL_MAX
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if (!isfinite(DBL_MAX)) return 1;
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#endif
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#endif
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return 0;
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}], have_broken_isfinite=no, have_broken_isfinite=yes, [
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case "${target}" in
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hppa*-*-hpux*) have_broken_isfinite=yes ;;
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*) have_broken_isfinite=no ;;
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esac])]
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LIBS=$libgfor_check_for_broken_isfinite_save_LIBS)
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if test x"$have_broken_isfinite" = xyes; then
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AC_DEFINE(HAVE_BROKEN_ISFINITE, 1, [Define if isfinite is broken.])
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fi])
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dnl Check whether isnan is broken.
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dnl The most common problem is that it does not work on long doubles.
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AC_DEFUN([LIBGFOR_CHECK_FOR_BROKEN_ISNAN], [
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AC_CACHE_CHECK([whether isnan is broken],
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have_broken_isnan, [
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libgfor_check_for_broken_isnan_save_LIBS=$LIBS
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LIBS="$LIBS -lm"
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AC_TRY_RUN([
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#ifdef HAVE_MATH_H
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#include <math.h>
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#endif
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#include <float.h>
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int main ()
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{
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#ifdef isnan
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#ifdef LDBL_MAX
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{
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long double x;
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x = __builtin_nanl ("");
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if (!isnan(x)) return 1;
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if (isnan(LDBL_MAX)) return 1;
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#ifdef NAN
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x = (long double) NAN;
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if (!isnan(x)) return 1;
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#endif
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}
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#endif
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#ifdef DBL_MAX
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{
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double y;
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y = __builtin_nan ("");
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if (!isnan(y)) return 1;
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if (isnan(DBL_MAX)) return 1;
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#ifdef NAN
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y = (double) NAN;
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if (!isnan(y)) return 1;
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#endif
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}
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#endif
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#endif
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return 0;
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}], have_broken_isnan=no, have_broken_isnan=yes, [
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case "${target}" in
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hppa*-*-hpux*) have_broken_isnan=yes ;;
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*) have_broken_isnan=no ;;
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esac])]
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LIBS=$libgfor_check_for_broken_isnan_save_LIBS)
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if test x"$have_broken_isnan" = xyes; then
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AC_DEFINE(HAVE_BROKEN_ISNAN, 1, [Define if isnan is broken.])
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fi])
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dnl Check whether fpclassify is broken.
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dnl The most common problem is that it does not work on long doubles.
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AC_DEFUN([LIBGFOR_CHECK_FOR_BROKEN_FPCLASSIFY], [
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AC_CACHE_CHECK([whether fpclassify is broken],
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have_broken_fpclassify, [
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libgfor_check_for_broken_fpclassify_save_LIBS=$LIBS
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LIBS="$LIBS -lm"
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AC_TRY_RUN([
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#ifdef HAVE_MATH_H
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#include <math.h>
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#endif
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#include <float.h>
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int main ()
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{
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#ifdef fpclassify
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#ifdef LDBL_MAX
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if (fpclassify(LDBL_MAX) == FP_NAN
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|| fpclassify(LDBL_MAX) == FP_INFINITE) return 1;
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#endif
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#ifdef DBL_MAX
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if (fpclassify(DBL_MAX) == FP_NAN
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|| fpclassify(DBL_MAX) == FP_INFINITE) return 1;
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#endif
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#endif
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return 0;
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}], have_broken_fpclassify=no, have_broken_fpclassify=yes, [
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case "${target}" in
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hppa*-*-hpux*) have_broken_fpclassify=yes ;;
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*) have_broken_fpclassify=no ;;
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esac])]
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LIBS=$libgfor_check_for_broken_fpclassify_save_LIBS)
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if test x"$have_broken_fpclassify" = xyes; then
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AC_DEFINE(HAVE_BROKEN_FPCLASSIFY, 1, [Define if fpclassify is broken.])
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fi])
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dnl Check whether the st_ino and st_dev stat fields taken together uniquely
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dnl identify the file within the system. This is should be true for POSIX
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dnl systems; it is known to be false on mingw32.
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AC_DEFUN([LIBGFOR_CHECK_WORKING_STAT], [
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AC_CACHE_CHECK([whether the target stat is reliable],
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have_working_stat, [
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AC_TRY_RUN([
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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int main ()
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{
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FILE *f, *g;
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struct stat st1, st2;
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f = fopen ("foo", "w");
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g = fopen ("bar", "w");
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if (stat ("foo", &st1) != 0 || stat ("bar", &st2))
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return 1;
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if (st1.st_dev == st2.st_dev && st1.st_ino == st2.st_ino)
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return 1;
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fclose(f);
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fclose(g);
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return 0;
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}], have_working_stat=yes, have_working_stat=no, [
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case "${target}" in
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*mingw*) have_working_stat=no ;;
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*) have_working_stat=yes;;
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esac])])
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if test x"$have_working_stat" = xyes; then
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AC_DEFINE(HAVE_WORKING_STAT, 1, [Define if target has a reliable stat.])
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fi])
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dnl Checks for fpsetmask function.
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AC_DEFUN([LIBGFOR_CHECK_FPSETMASK], [
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AC_CACHE_CHECK([whether fpsetmask is present], have_fpsetmask, [
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AC_TRY_LINK([
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#if HAVE_FLOATINGPOINT_H
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# include <floatingpoint.h>
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#endif /* HAVE_FLOATINGPOINT_H */
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#if HAVE_IEEEFP_H
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# include <ieeefp.h>
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#endif /* HAVE_IEEEFP_H */],[fpsetmask(0);],
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eval "have_fpsetmask=yes", eval "have_fpsetmask=no")
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])
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if test x"$have_fpsetmask" = xyes; then
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AC_DEFINE(HAVE_FPSETMASK, 1, [Define if you have fpsetmask.])
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fi
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])
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