-# floorf.m4 serial 1
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+# floorf.m4 serial 6
+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([floorf], , , [#include <math.h>])
if test "$ac_cv_have_decl_floorf" = yes; then
dnl Test whether floorf() can be used without libm.
- FLOORF_LIBM=?
+ gl_FUNC_FLOORF_LIBS
+ if test "$FLOORF_LIBM" = "?"; then
+ dnl Sun C 5.0 on Solaris declares floorf() and has it in the system-wide
+ dnl libm.so, but not in the libm.so that the compiler uses.
+ REPLACE_FLOORF=1
+ fi
+ else
+ HAVE_DECL_FLOORF=0
+ fi
+ if test $HAVE_DECL_FLOORF = 0 || test $REPLACE_FLOORF = 1; then
+ AC_LIBOBJ([floorf])
+ FLOORF_LIBM=
+ fi
+ AC_SUBST([FLOORF_LIBM])
+])
+
+# Determines the libraries needed to get the floorf() function.
+# Sets FLOORF_LIBM.
+AC_DEFUN([gl_FUNC_FLOORF_LIBS],
+[
+ gl_CACHE_VAL_SILENT([gl_cv_func_floorf_libm], [
+ gl_cv_func_floorf_libm=?
AC_TRY_LINK([
#ifndef __NO_MATH_INLINES
# define __NO_MATH_INLINES 1 /* for glibc */
#include <math.h>
float x;],
[x = floorf(x);],
- [FLOORF_LIBM=])
- if test "$FLOORF_LIBM" = "?"; then
+ [gl_cv_func_floorf_libm=])
+ if test "$gl_cv_func_floorf_libm" = "?"; then
save_LIBS="$LIBS"
LIBS="$LIBS -lm"
AC_TRY_LINK([
#include <math.h>
float x;],
[x = floorf(x);],
- [FLOORF_LIBM="-lm"])
+ [gl_cv_func_floorf_libm="-lm"])
LIBS="$save_LIBS"
fi
- if test "$FLOORF_LIBM" = "?"; then
- FLOORF_LIBM=
- fi
- else
- HAVE_DECL_FLOORF=0
- AC_LIBOBJ([floorf])
- FLOORF_LIBM=
- fi
- AC_SUBST([HAVE_DECL_FLOORF])
- AC_SUBST([FLOORF_LIBM])
+ ])
+ FLOORF_LIBM="$gl_cv_func_floorf_libm"
])