quotearg: don't attempt to store 1 << 31 into an "int"

[gnulib.git] / m4 / fabsf.m4

diff --git a/m4/fabsf.m4 b/m4/fabsf.m4
index 90e46a6..c141507 100644 (file)
--- a/m4/fabsf.m4
+++ b/m4/fabsf.m4
@@ -1,5 +1,5 @@
-# fabsf.m4 serial 2
-dnl Copyright (C) 2011 Free Software Foundation, Inc.
+# fabsf.m4 serial 3
+dnl Copyright (C) 2011-2013 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.
@@ -9,6 +9,9 @@ AC_DEFUN([gl_FUNC_FABSF],
   AC_REQUIRE([gl_MATH_H_DEFAULTS])
   AC_REQUIRE([gl_FUNC_FABS])
 
+  dnl Persuade glibc <math.h> to declare fabsf().
+  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+
   dnl Test whether fabsf() exists. We cannot assume that fabsf(), if it
   dnl exists, is defined in the same library as fabs(). This is not the case
   dnl on FreeBSD, NetBSD, OpenBSD.