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

third_party/icu/icu.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.
 
 {
   'includes': [
     '../../build/common.gypi',
   ],
   'target_defaults': {
     'defines': [
@@ skipping 23 matching lines @@
         'linux/icudt42l_dat.s',
         'mac/icudt42l_dat.s',
       ],
       'conditions': [
         [ 'OS == "win"', {
           'type': 'none',
           'msvs_tool_files': ['../../build/output_dll_copy.rules'],
         }, {  # else: OS != "win"
           'sources!': ['icudt42.dll'],
         }],
-        [ 'OS != "linux"', {
+        [ 'OS != "linux" and OS != "freebsd"', {
           'sources!': ['linux/icudt42l_dat.s'],
         }],
         [ 'OS != "mac"', {
           'sources!': ['mac/icudt42l_dat.s'],
         }],
       ],
     },
     {
       'target_name': 'icui18n',
       'type': '<(library)',
@@ skipping 339 matching lines @@
             'cflags': [
                 '-Wno-unused-function',
                 # TODO(port): fix ICU to not depend on this flag.
                 '-fno-strict-aliasing',
             ],
         },],
       ],
     },
   ],
 }