# HG changeset patch
# User Simon Josefsson <simon@josefsson.org>
# Date 1268836140 -3600
# Node ID de97ad7c83ebc7e3e272dd38df1258ab8f6567e2
# Parent  3870d1e5f8d4b6472cdccb6efc41190876a1428b
pty: Make forkpty check work.

diff --git a/ChangeLog b/ChangeLog
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2010-03-17  Ludovic Courtès <ludo@gnu.org>  (tiny change)
+
+	* m4/pty.m4: Unset $ac_cv_have_decl_forkpty before the second
+	`AC_CHECK_DECL' invocation.
+
 2010-03-15  Sergey Poznyakoff  <gray@gnu.org.ua>
 
 	* lib/inttostr.c (inttostr): Make sure the invocation of verify
diff --git a/m4/pty.m4 b/m4/pty.m4
--- a/m4/pty.m4
+++ b/m4/pty.m4
@@ -17,6 +17,7 @@
   if test $ac_cv_header_pty_h != yes; then
     AC_CHECK_DECL([forkpty],,, [[#include <util.h>]])
     if test $ac_cv_have_decl_forkpty = no; then
+      unset ac_cv_have_decl_forkpty
       AC_CHECK_DECL([forkpty],,, [[#include <libutil.h>]])
       if test $ac_cv_have_decl_forkpty = no; then
         AC_MSG_WARN([[Cannot find forkpty, build will likely fail]])