X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fisinf.m4;h=145e37e669b39a8f23a5b1b62cb2b81c69ce7f43;hb=c8228c7d1f864908fd64cd47eefb418e419da549;hp=f6056e61034b9fb57d8600ff7b23a17bc2d98085;hpb=13b89dbfbb8d158de86f9bef5e45889ce47f0fd5;p=gnulib.git

diff --git a/m4/isinf.m4 b/m4/isinf.m4
index f6056e610..145e37e66 100644
--- a/m4/isinf.m4
+++ b/m4/isinf.m4
@@ -1,4 +1,4 @@
-# isinf.m4 serial 4
+# isinf.m4 serial 5
 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,
@@ -11,7 +11,7 @@ AC_DEFUN([gl_ISINF],
   AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
   AC_CHECK_DECLS([isinf], , , [#include <math.h>])
   if test "$ac_cv_have_decl_isinf" = yes; then
-    gl_CHECK_MATH_LIB([ISINF_LIBM], [x = isinf (x);])
+    gl_CHECK_MATH_LIB([ISINF_LIBM], [x = isinf (x) + isinf ((float) x);])
     if test "$ISINF_LIBM" != missing; then
       dnl Test whether isinf() on 'long double' works.
       gl_ISINFL_WORKS