Continue with the FreeBSD port - this version builds and links, though...

webkit/webkit.gyp

 # Copyright (c) 2009 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'feature_defines': [
       'ENABLE_CHANNEL_MESSAGING=1',
       'ENABLE_DATABASE=1',
       'ENABLE_DATAGRID=0',
@@ skipping 1587 matching lines @@
           'files': [
 
             '<@(webinspector_image_files)',
 
           ],
         },
       ],
     },
   ], # targets
   'conditions': [
-    ['OS=="linux"', {
+    ['OS=="linux" or OS=="freebsd"', {
       # See the comments in libxul_hack.cc for a description of why these
       # libraries exist.
       'targets': [
         {
           # We want to build exactly "libxul.so".
           'target_name': 'xul',
           'product_dir': '<(PRODUCT_DIR)',
           'type': 'loadable_module',
           'sources': [
             'tools/libxul_hack/libxul_hack.cc'
           ],
         },
         {
           # We want to build exactly "libxpcom.so".
           'target_name': 'xpcom',
           'product_dir': '<(PRODUCT_DIR)',
           'type': 'loadable_module',
           'sources': [
             'tools/libxul_hack/libxpcom_hack.cc'
           ],
         },
       ], # targets
     }],
   ], # conditions
 }