Imported Upstream version 1.4.19

[platform/upstream/m4.git] / lib / isnand-nolibm.h

diff --git a/lib/isnand-nolibm.h b/lib/isnand-nolibm.h
index dc47264..c299130 100644 (file)
--- a/lib/isnand-nolibm.h
+++ b/lib/isnand-nolibm.h
@@ -1,5 +1,5 @@
 /* Test for NaN that does not need libm.
-   Copyright (C) 2007-2016 Free Software Foundation, Inc.
+   Copyright (C) 2007-2021 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
@@ -12,13 +12,13 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
 
 #if HAVE_ISNAND_IN_LIBC
 /* Get declaration of isnan macro.  */
 # include <math.h>
-# if __GNUC__ >= 4
-   /* GCC 4.0 and newer provides three built-ins for isnan.  */
+# if (__GNUC__ >= 4) || (__clang_major__ >= 4)
+   /* GCC >= 4.0 and clang provide a type-generic built-in for isnan.  */
 #  undef isnand
 #  define isnand(x) __builtin_isnan ((double)(x))
 # else