From a25368f150046137109aa8cf58cb85dc6bc234b5 Mon Sep 17 00:00:00 2001
From: Bruno Haible <bruno@clisp.org>
Date: Mon, 10 Oct 2011 01:07:15 +0200
Subject: roundl: Simplify for platforms where 'long double' == 'double'.

* lib/roundl.c: Include <config.h>.
(roundl) [HAVE_SAME_LONG_DOUBLE_AS_DOUBLE]: New function.
* lib/round.c [!USE_LONG_DOUBLE]: Don't include <config.h> a second
time.
* m4/roundl.m4 (gl_FUNC_ROUNDL): Require gl_LONG_DOUBLE_VS_DOUBLE.
Determine ROUNDL_LIBM according to HAVE_SAME_LONG_DOUBLE_AS_DOUBLE.
* modules/roundl (Depends-on): Add round. Update conditions.
---
 lib/roundl.c | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

(limited to 'lib/roundl.c')

diff --git a/lib/roundl.c b/lib/roundl.c
index 28f3f6f5c8..9cf81db4c1 100644
--- a/lib/roundl.c
+++ b/lib/roundl.c
@@ -15,5 +15,22 @@
    with this program; if not, write to the Free Software Foundation,
    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
 
-#define USE_LONG_DOUBLE
-#include "round.c"
+#include <config.h>
+
+#if HAVE_SAME_LONG_DOUBLE_AS_DOUBLE
+
+/* Specification.  */
+# include <math.h>
+
+long double
+roundl (long double x)
+{
+  return round (x);
+}
+
+#else
+
+# define USE_LONG_DOUBLE
+# include "round.c"
+
+#endif
-- 
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