Check the ibus version in build script.

build/linux/system.gyp

 # Copyright (c) 2011 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.
 
 {
   'conditions': [
     ['sysroot!=""', {
       'variables': {
         'pkg-config': './pkg-config-wrapper "<(sysroot)"',
       },
@@ skipping 333 matching lines @@
         'libraries': [
           '-lresolv',
         ],
       },
     },
     {
       'target_name': 'ibus',
       'type': 'settings',
       'conditions': [
         ['use_ibus==1', {
+          'variables': {
+            'ibus_version': '1.3.99.20110425',

[Mark Mentovai, 2011/05/02 17:51:39]

ibus_version sounds like it’s the version of ibus in use. Maybe call this
ibus_min_version.

[Peng, 2011/05/02 18:12:29]

Done.

+          },
           'direct_dependent_settings': {
             'defines': ['HAVE_IBUS=1'],
             'cflags': [
-              '<!@(<(pkg-config) --cflags ibus-1.0)',
+              '<!@(<(pkg-config) --cflags "ibus-1.0 >= <(ibus_version)")',
             ],
           },
           'link_settings': {
             'ldflags': [
-              '<!@(<(pkg-config) --libs-only-L --libs-only-other ibus-1.0)',
+              '<!@(<(pkg-config) --libs-only-L --libs-only-other "ibus-1.0 >= <(ibus_version)")',
             ],
             'libraries': [
-              '<!@(<(pkg-config) --libs-only-l ibus-1.0)',
+              '<!@(<(pkg-config) --libs-only-l "ibus-1.0 >= <(ibus_version)")',
             ],
           },
         }],
       ],
     },
   ],
 }
 
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