=== modified file 'configure.ac'
--- configure.ac	2012-07-17 07:30:25 +0000
+++ configure.ac	2012-07-23 10:52:48 +0000
@@ -2759,7 +2759,7 @@
 AC_CHECK_FUNCS(grantpt)
 
 # PTY-related GNU extensions.
-AC_CHECK_FUNCS(getpt)
+AC_CHECK_FUNCS(getpt posix_openpt)
 
 # Check this now, so that we will NOT find the above functions in ncurses.
 # That is because we have not set up to link ncurses in lib-src.
@@ -3356,11 +3356,11 @@
     AC_DEFINE(PTY_TTY_NAME_SPRINTF, [] )
     ;;
 
-  gnu | freebsd | netbsd | openbsd )
+  gnu | netbsd | openbsd )
     AC_DEFINE(FIRST_PTY_LETTER, ['p'])
     ;;
 
-  gnu-linux | gnu-kfreebsd )
+  gnu-linux | gnu-kfreebsd | freebsd )
     dnl if HAVE_GRANTPT
     if test "x$ac_cv_func_grantpt" = xyes; then
       AC_DEFINE(UNIX98_PTYS, 1, [Define if the system has Unix98 PTYs.])
@@ -3368,8 +3368,12 @@
       dnl Note that grantpt and unlockpt may fork.  We must block SIGCHLD
       dnl to prevent sigchld_handler from intercepting the child's death.
       AC_DEFINE(PTY_TTY_NAME_SPRINTF, [{ char *ptyname; sigblock (sigmask (SIGCHLD)); if (grantpt (fd) == -1 || unlockpt (fd) == -1 || !(ptyname = ptsname(fd))) { sigunblock (sigmask (SIGCHLD)); close (fd); return -1; } snprintf (pty_name, sizeof pty_name, "%s", ptyname); sigunblock (sigmask (SIGCHLD)); }] )
+      dnl if HAVE_POSIX_OPENPT
+      if test "x$ac_cv_func_posix_openpt" = xyes; then
+        AC_DEFINE(PTY_OPEN, [fd = posix_openpt (O_RDWR | O_NOCTTY)])
+        AC_DEFINE(PTY_NAME_SPRINTF, [] )
       dnl if HAVE_GETPT
-      if test "x$ac_cv_func_getpt" = xyes; then
+      elif test "x$ac_cv_func_getpt" = xyes; then
         AC_DEFINE(PTY_OPEN, [fd = getpt ()])
         AC_DEFINE(PTY_NAME_SPRINTF, [] )
       else