-# roundl.m4 serial 1
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+# roundl.m4 serial 5
+dnl Copyright (C) 2007, 2009 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_REQUIRE([gl_MATH_H_DEFAULTS])
dnl Persuade glibc <math.h> to declare roundl().
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
- dnl Test whether roundl() is declared.
- gl_CHECK_LIBM_FUNC([roundl], [x = roundl(x);], [], [
- dnl No. Are both floorl() and ceill() available? If so then we can use
- dnl them to implement roundl(), on the assumption that they're fast.
- gl_CHECK_LIBM_FUNC([floorl], [x = floorl(x);], [
- AC_CHECK_DECL([ceill],
- [dnl Yes. Both are declared. Link against the necessary library.
- ROUNDL_LIBM="$FLOORL_LIBM"],
- [: dnl No. We will use an implementation that doesn't need them.
-], [#include <math.h>
-])])])])
+ AC_CHECK_DECLS([roundl], , , [#include <math.h>])
+ if test "$ac_cv_have_decl_roundl" = yes; then
+ gl_CHECK_MATH_LIB([ROUNDL_LIBM], [x = roundl (x);])
+ fi
+ if test "$ac_cv_have_decl_roundl" != yes || test "$ROUNDL_LIBM" = missing; then
+ REPLACE_ROUNDL=1
+ AC_LIBOBJ([roundl])
+ AC_CHECK_DECLS([ceill, floorl], , , [#include <math.h>])
+ if test "$ac_cv_have_decl_floorl" = yes \
+ && test "$ac_cv_have_decl_ceill" = yes; then
+ gl_FUNC_FLOORL_LIBS
+ gl_FUNC_CEILL_LIBS
+ if test "$FLOORL_LIBM" != '?' && test "$CEILL_LIBM" != '?'; then
+ AC_DEFINE([HAVE_FLOORL_AND_CEILL], [1],
+ [Define if the both the floorl() and ceill() functions exist.])
+ ROUNDL_LIBM="$FLOORL_LIBM $CEILL_LIBM"
+ else
+ ROUNDL_LIBM=
+ fi
+ else
+ ROUNDL_LIBM=
+ fi
+ fi
+ AC_SUBST([ROUNDL_LIBM])
+])