-# ceilf.m4 serial 1
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+# ceilf.m4 serial 7
+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_CHECK_DECLS([ceilf], , , [#include <math.h>])
if test "$ac_cv_have_decl_ceilf" = yes; then
dnl Test whether ceilf() can be used without libm.
- CEILF_LIBM=?
- AC_TRY_LINK([
- #ifndef __NO_MATH_INLINES
- # define __NO_MATH_INLINES 1 /* for glibc */
- #endif
- #include <math.h>
- float x;],
- [x = ceilf(x);],
- [CEILF_LIBM=])
+ gl_FUNC_CEILF_LIBS
if test "$CEILF_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>
- float x;],
- [x = ceilf(x);],
- [CEILF_LIBM="-lm"])
- LIBS="$save_LIBS"
- fi
- if test "$CEILF_LIBM" = "?"; then
- CEILF_LIBM=
+ dnl Sun C 5.0 on Solaris declares ceilf() and has it in the system-wide
+ dnl libm.so, but not in the libm.so that the compiler uses.
+ REPLACE_CEILF=1
fi
else
HAVE_DECL_CEILF=0
+ fi
+ if test $HAVE_DECL_CEILF = 0 || test $REPLACE_CEILF = 1; then
AC_LIBOBJ([ceilf])
CEILF_LIBM=
fi
- AC_SUBST([HAVE_DECL_CEILF])
AC_SUBST([CEILF_LIBM])
])
+
+# Determines the libraries needed to get the ceilf() function.
+# Sets CEILF_LIBM.
+AC_DEFUN([gl_FUNC_CEILF_LIBS],
+[
+ gl_CACHE_VAL_SILENT([gl_cv_func_ceilf_libm], [
+ gl_cv_func_ceilf_libm=?
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#ifndef __NO_MATH_INLINES
+ # define __NO_MATH_INLINES 1 /* for glibc */
+ #endif
+ #include <math.h>
+ float x;]],
+ [[x = ceilf(x);]])],
+ [gl_cv_func_ceilf_libm=])
+ if test "$gl_cv_func_ceilf_libm" = "?"; then
+ save_LIBS="$LIBS"
+ LIBS="$LIBS -lm"
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#ifndef __NO_MATH_INLINES
+ # define __NO_MATH_INLINES 1 /* for glibc */
+ #endif
+ #include <math.h>
+ float x;]],
+ [[x = ceilf(x);]])],
+ [gl_cv_func_ceilf_libm="-lm"])
+ LIBS="$save_LIBS"
+ fi
+ ])
+ CEILF_LIBM="$gl_cv_func_ceilf_libm"
+])