-# ceill.m4 serial 1
+# ceill.m4 serial 3
dnl Copyright (C) 2007 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
AC_CHECK_DECLS([ceill], , , [#include <math.h>])
if test "$ac_cv_have_decl_ceill" = yes; then
dnl Test whether ceill() can be used without libm.
- CEILL_LIBM=?
+ gl_FUNC_CEILL_LIBS
+ if test "$CEILL_LIBM" = "?"; then
+ dnl Sun C 5.0 on Solaris declares ceill() and has it in the system-wide
+ dnl libm.so, but not in the libm.so that the compiler uses.
+ REPLACE_CEILL=1
+ fi
+ else
+ REPLACE_CEILL=1
+ fi
+ if test $REPLACE_CEILL = 1; then
+ AC_LIBOBJ([ceill])
+ CEILL_LIBM=
+ fi
+ AC_SUBST([REPLACE_CEILL])
+ AC_SUBST([CEILL_LIBM])
+])
+
+# Determines the libraries needed to get the ceill() function.
+# Sets CEILL_LIBM.
+AC_DEFUN([gl_FUNC_CEILL_LIBS],
+[
+ AC_CACHE_VAL([gl_cv_func_ceill_libm], [
+ gl_cv_func_ceill_libm=?
AC_TRY_LINK([
#ifndef __NO_MATH_INLINES
# define __NO_MATH_INLINES 1 /* for glibc */
#include <math.h>
long double x;],
[x = ceill(x);],
- [CEILL_LIBM=])
- if test "$CEILL_LIBM" = "?"; then
+ [gl_cv_func_ceill_libm=])
+ if test "$gl_cv_func_ceill_libm" = "?"; then
save_LIBS="$LIBS"
LIBS="$LIBS -lm"
AC_TRY_LINK([
#include <math.h>
long double x;],
[x = ceill(x);],
- [CEILL_LIBM="-lm"])
+ [gl_cv_func_ceill_libm="-lm"])
LIBS="$save_LIBS"
fi
- if test "$CEILL_LIBM" = "?"; then
- CEILL_LIBM=
- fi
- else
- HAVE_DECL_CEILL=0
- AC_LIBOBJ([ceill])
- CEILL_LIBM=
- fi
- AC_SUBST([HAVE_DECL_CEILL])
- AC_SUBST([CEILL_LIBM])
+ ])
+ CEILL_LIBM="$gl_cv_func_ceill_libm"
])