+# ceil.m4 serial 1
+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,
+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=])
+ if test "$CEIL_LIBM" = "?"; then
+ save_LIBS="$LIBS"
+ LIBS="$LIBS -lm"
+ AC_TRY_LINK([
+ #ifndef __NO_MATH_INLINES
+ # define __NO_MATH_INLINES 1 /* for glibc */
+ #endif
+ #include <math.h>
+ double x;],
+ [x = ceil(x);],
+ [CEIL_LIBM="-lm"])
+ LIBS="$save_LIBS"
+ fi
+ if test "$CEIL_LIBM" = "?"; then
+ CEIL_LIBM=
+ fi
+ AC_SUBST([CEIL_LIBM])
+])