[gjs] Conditionally check for JS_FreezeObject

[Colin Walters <walters src gnome org>]

commit 1fb9cd1058002b0555048ab8b3e401c8e011e573
Author: Colin Walters <walters verbum org>
Date:   Wed Oct 20 12:33:32 2010 -0400

    Conditionally check for JS_FreezeObject
    
    This ensures we work with a pre-2.0 snapshot.

 configure.ac   |    3 +++
 modules/lang.c |    2 +-
 2 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 5bc7286..35c64c9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -149,6 +149,9 @@ AC_MSG_CHECKING([for mozilla-js >= 2 ])
 if `$PKG_CONFIG --exists $JS_PACKAGE '>=' 2`; then
   AC_MSG_RESULT([yes])
   AC_DEFINE(HAVE_MOZJS_2, [1], [Define if mozilla-js is at least 2])
+  AC_CHECK_LIB([mozjs], [JS_FreezeObject], AC_DEFINE([HAVE_JS_FREEZEOBJECT], [1], [Define if we have JS_FreezeObject]),
+              , [$JS_LIBS])
+
 else
   AC_MSG_RESULT([no])
 fi
diff --git a/modules/lang.c b/modules/lang.c
index c87d7a1..76b3e67 100644
--- a/modules/lang.c
+++ b/modules/lang.c
@@ -39,7 +39,7 @@ gjs_lang_seal(JSContext *cx, JSObject *obj, uintN argc,
         return JS_FALSE;
     if (!target)
         return JS_TRUE;
-#ifdef HAVE_MOZJS_2
+#ifdef HAVE_JS_FREEZEOBJECT
     if (deep && (!JS_DeepFreezeObject(cx, target)) )
         return JS_FALSE;
     if (!deep && (!JS_FreezeObject(cx, target)) )