New upstream version 1.8

[debian/gzip] / lib / math.in.h

diff --git a/lib/math.in.h b/lib/math.in.h
index 7189819b044567811b1e9f5fd634a42d0fc5bc05..e3fd99437d4ae30d27eb910542a6a134d9887f6c 100644 (file)
--- a/lib/math.in.h
+++ b/lib/math.in.h
@@ -1,6 +1,6 @@
 /* A GNU-like <math.h>.
 
-   Copyright (C) 2002-2003, 2007-2013 Free Software Foundation, Inc.
+   Copyright (C) 2002-2003, 2007-2016 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -28,6 +28,9 @@
 #ifndef _@GUARD_PREFIX@_MATH_H
 #define _@GUARD_PREFIX@_MATH_H
 
+#ifndef _GL_INLINE_HEADER_BEGIN
+ #error "Please include config.h first."
+#endif
 _GL_INLINE_HEADER_BEGIN
 #ifndef _GL_MATH_INLINE
 # define _GL_MATH_INLINE _GL_INLINE
@@ -2202,7 +2205,8 @@ _GL_WARN_REAL_FLOATING_DECL (isnan);
 
 
 #if @GNULIB_SIGNBIT@
-# if @REPLACE_SIGNBIT_USING_GCC@
+# if (@REPLACE_SIGNBIT_USING_GCC@ \
+      && (!defined __cplusplus || __cplusplus < 201103))
 #  undef signbit
    /* GCC 4.0 and newer provides three built-ins for signbit.  */
 #  define signbit(x) \