-# isfinite.m4 serial 9
+# isfinite.m4 serial 10
dnl Copyright (C) 2007-2011 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
AC_CHECK_DECLS([isfinite], , , [#include <math.h>])
if test "$ac_cv_have_decl_isfinite" = yes; then
- gl_CHECK_MATH_LIB([ISFINITE_LIBM], [x = isfinite (x);])
+ gl_CHECK_MATH_LIB([ISFINITE_LIBM],
+ [x = isfinite (x) + isfinite ((float) x);])
if test "$ISFINITE_LIBM" != missing; then
dnl Test whether isfinite() on 'long double' works.
gl_ISFINITEL_WORKS