-# ceill.m4 serial 1
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+# ceill.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([ceill], , , [#include <math.h>])
if test "$ac_cv_have_decl_ceill" = yes; then
dnl Test whether ceill() can be used without libm.
- CEILL_LIBM=?
- AC_TRY_LINK([
- #ifndef __NO_MATH_INLINES
- # define __NO_MATH_INLINES 1 /* for glibc */
- #endif
- #include <math.h>
- long double x;],
- [x = ceill(x);],
- [CEILL_LIBM=])
+ gl_FUNC_CEILL_LIBS
if test "$CEILL_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>
- long double x;],
- [x = ceill(x);],
- [CEILL_LIBM="-lm"])
- LIBS="$save_LIBS"
- fi
- if test "$CEILL_LIBM" = "?"; then
- CEILL_LIBM=
+ 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
HAVE_DECL_CEILL=0
+ fi
+ if test $HAVE_DECL_CEILL = 0 || test $REPLACE_CEILL = 1; then
AC_LIBOBJ([ceill])
CEILL_LIBM=
fi
- AC_SUBST([HAVE_DECL_CEILL])
AC_SUBST([CEILL_LIBM])
])
+
+# Determines the libraries needed to get the ceill() function.
+# Sets CEILL_LIBM.
+AC_DEFUN([gl_FUNC_CEILL_LIBS],
+[
+ gl_CACHE_VAL_SILENT([gl_cv_func_ceill_libm], [
+ gl_cv_func_ceill_libm=?
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#ifndef __NO_MATH_INLINES
+ # define __NO_MATH_INLINES 1 /* for glibc */
+ #endif
+ #include <math.h>
+ long double x;]],
+ [[x = ceill(x);]])],
+ [gl_cv_func_ceill_libm=])
+ if test "$gl_cv_func_ceill_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>
+ long double x;]],
+ [[x = ceill(x);]])],
+ [gl_cv_func_ceill_libm="-lm"])
+ LIBS="$save_LIBS"
+ fi
+ ])
+ CEILL_LIBM="$gl_cv_func_ceill_libm"
+])