-# ceil.m4 serial 1
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+# ceil.m4 serial 3
+dnl Copyright (C) 2007, 2009, 2010 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.
AC_DEFUN([gl_FUNC_CEIL],
[
dnl Test whether ceil() can be used without libm.
- CEIL_LIBM=?
- AC_TRY_LINK([
- #ifndef __NO_MATH_INLINES
- # define __NO_MATH_INLINES 1 /* for glibc */
- #endif
- #include <math.h>
- double x;],
- [x = ceil(x);],
- [CEIL_LIBM=])
+ gl_FUNC_CEIL_LIBS
if test "$CEIL_LIBM" = "?"; then
- save_LIBS="$LIBS"
- LIBS="$LIBS -lm"
+ CEIL_LIBM=
+ fi
+ AC_SUBST([CEIL_LIBM])
+])
+
+# Determines the libraries needed to get the ceil() function.
+# Sets CEIL_LIBM.
+AC_DEFUN([gl_FUNC_CEIL_LIBS],
+[
+ gl_CACHE_VAL_SILENT([gl_cv_func_ceil_libm], [
+ gl_cv_func_ceil_libm=?
AC_TRY_LINK([
#ifndef __NO_MATH_INLINES
# define __NO_MATH_INLINES 1 /* for glibc */
#include <math.h>
double x;],
[x = ceil(x);],
- [CEIL_LIBM="-lm"])
- LIBS="$save_LIBS"
- fi
- if test "$CEIL_LIBM" = "?"; then
- CEIL_LIBM=
- fi
- AC_SUBST([CEIL_LIBM])
+ [gl_cv_func_ceil_libm=])
+ if test "$gl_cv_func_ceil_libm" = "?"; then
+ save_LIBS="$LIBS"
+ LIBS="$LIBS -lm"
+ AC_TRY_LINK([
+ #ifndef __NO_MATH_INLINES
+ # define __NO_MATH_INLINES 1 /* for glibc */
+ #endif
+ #include <math.h>
+ double x;],
+ [x = ceil(x);],
+ [gl_cv_func_ceil_libm="-lm"])
+ LIBS="$save_LIBS"
+ fi
+ ])
+ CEIL_LIBM="$gl_cv_func_ceil_libm"
])