truncl: Fix autoconf test.

diff --git a/ChangeLog b/ChangeLog
index 79b3536..5a8f0b4 100644 (file)
--- 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 0498585..49f0065 100644 (file)
--- 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 ;;