Copy from trunk.

1 files changed, 29 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/common/bits/huge_vall.h b/libc/sysdeps/linux/common/bits/huge_vall.h
new file mode 100644
index 000000000..d5e8e2237
--- /dev/null
+++ b/libc/sysdeps/linux/common/bits/huge_vall.h
@@ -0,0 +1,29 @@
+/* Default `HUGE_VALL' constant.
+   Used by <stdlib.h> and <math.h> functions for overflow.
+   Copyright (C) 1992, 1996, 1997, 2004 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifndef _MATH_H
+# error "Never use <bits/huge_vall.h> directly; include <math.h> instead."
+#endif
+
+#if __GNUC_PREREQ(3,3)
+# define HUGE_VALL	(__builtin_huge_vall())
+#else
+# define HUGE_VALL	((long double) HUGE_VAL)
+#endif