From 11b16d3cdc4646f80822751dc6882b21c9da2a22 Mon Sep 17 00:00:00 2001
From: Bruno Haible <bruno@clisp.org>
Date: Fri, 30 Jul 2010 21:18:13 +0200
Subject: [PATCH] truncl: Fix autoconf test.

---
 ChangeLog    | 7 +++++++
 m4/truncl.m4 | 5 ++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 79b353688..5a8f0b40a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,12 @@
 2010-07-30  Bruno Haible  <bruno@clisp.org>
 
+	truncl: Fix autoconf test.
+	* m4/truncl.m4 (gl_FUNC_TRUNCL): Add TRUNCL_LIBM to LIBS while testing
+	whether truncl works.
+	Reported by Rainer Tammer.
+
+2010-07-30  Bruno Haible  <bruno@clisp.org>
+
 	round: Update regarding AIX.
 	* m4/round.m4 (gl_FUNC_ROUND): When cross-compiling, guess no on AIX 7.
 	* doc/posix-functions/round.texi: Mention bug on AIX 7.1.
diff --git a/m4/truncl.m4 b/m4/truncl.m4
index 0498585b2..49f006520 100644
--- a/m4/truncl.m4
+++ b/m4/truncl.m4
@@ -1,4 +1,4 @@
-# truncl.m4 serial 4
+# truncl.m4 serial 5
 dnl Copyright (C) 2007-2008, 2010 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -40,6 +40,8 @@ AC_DEFUN([gl_FUNC_TRUNCL],
       TRUNCL_LIBM=
     fi
     dnl Test whether truncl() works. It crashes on OSF/1 4.0d.
+    save_LIBS="$LIBS"
+    LIBS="$LIBS $TRUNCL_LIBM"
     AC_CACHE_CHECK([whether truncl works], [gl_cv_func_truncl_works],
       [
         AC_TRY_RUN([
@@ -56,6 +58,7 @@ int main()
            esac
           ])
       ])
+    LIBS="$save_LIBS"
     case "$gl_cv_func_truncl_works" in
       *yes) ;;
       *) REPLACE_TRUNCL=1 ;;
-- 
2.11.0