-# remainderf.m4 serial 6
-dnl Copyright (C) 2012 Free Software Foundation, Inc.
+# remainderf.m4 serial 8
+dnl Copyright (C) 2012-2013 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
m4_ifdef([gl_FUNC_REMAINDERF_IEEE], [
if test $gl_remainderf_required = ieee && test $REPLACE_REMAINDERF = 0; then
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether remainderf works according to ISO C 99 with IEC 60559],
[gl_cv_func_remainderf_ieee],
[
]])],
[gl_cv_func_remainderf_ieee=yes],
[gl_cv_func_remainderf_ieee=no],
- [gl_cv_func_remainderf_ieee="guessing no"])
+ [case "$host_os" in
+ # Guess yes on glibc systems.
+ *-gnu*) gl_cv_func_remainderf_ieee="guessing yes" ;;
+ # If we don't know, assume the worst.
+ *) gl_cv_func_remainderf_ieee="guessing no" ;;
+ esac
+ ])
LIBS="$save_LIBS"
])
case "$gl_cv_func_remainderf_ieee" in
[
AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
- AC_CHECK_FUNCS_ONCE([alarm])
+ AC_CHECK_DECLS_ONCE([alarm])
AC_CACHE_CHECK([whether remainderf works], [gl_cv_func_remainderf_works],
[
AC_RUN_IFELSE(
[AC_LANG_SOURCE([[
#include <math.h>
-#if HAVE_ALARM
+#if HAVE_DECL_ALARM
+# include <signal.h>
# include <unistd.h>
#endif
extern
float z;
int main ()
{
-#if HAVE_ALARM
+#if HAVE_DECL_ALARM
+ signal (SIGALRM, SIG_DFL);
alarm (5);
#endif
/* This test fails on IRIX 6.5. */