relocatable-shell: Update suggested usage in maintainer documentation.

[gnulib.git] / lib / truncl.c

diff --git a/lib/truncl.c b/lib/truncl.c
index b391ecb..c30cffc 100644 (file)
--- a/lib/truncl.c
+++ b/lib/truncl.c
@@ -1,5 +1,5 @@
 /* Round towards zero.
-   Copyright (C) 2007, 2009 Free Software Foundation, Inc.
+   Copyright (C) 2007, 2009-2014 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
@@ -16,5 +16,22 @@
 
 /* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
 
-#define USE_LONG_DOUBLE
-#include "trunc.c"
+#include <config.h>
+
+#if HAVE_SAME_LONG_DOUBLE_AS_DOUBLE
+
+/* Specification.  */
+# include <math.h>
+
+long double
+truncl (long double x)
+{
+  return trunc (x);
+}
+
+#else
+
+# define USE_LONG_DOUBLE
+# include "trunc.c"
+
+#endif