Do not depend on or try to configure pangocairo when use_pango == 0

build/linux/system.gyp

 # Copyright (c) 2012 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': {
     'conditions': [
       ['sysroot!=""', {
         'pkg-config': '<(chroot_cmd) ./pkg-config-wrapper "<(sysroot)" "<(target_arch)" "<(system_libdir)"',
       }, {
@@ skipping 640 matching lines @@
                          '--link-directly=<(linux_link_libpci)',
                          '<@(libpci_functions)',
               ],
               'message': 'Generating libpci library loader',
               'process_outputs_as_sources': 1,
             },
           ],
         },
       ],
     }],
+    ['use_pango==1 and use_cairo==1', {
+      'targets': [
+        {
+          'target_name': 'pangocairo',
+          'type': 'none',

[Nico, 2015/01/13 22:55:50]

Please keep the target available unconditionally, and only put all the
*_settings stuff inside the conditional. Then stuff can depend on tharget
pangocairo unconditionally, and it's an empty noop target in some configs.

[sfunkenhauser-google, 2015/01/14 17:13:58]

Done.

+          'toolsets': ['host', 'target'],
+          'conditions': [
+            ['_toolset=="target"', {
+              'direct_dependent_settings': {
+                'cflags': [
+                  '<!@(<(pkg-config) --cflags pangocairo pangoft2)',
+                ],
+              },
+              'link_settings': {
+                'ldflags': [
+                  '<!@(<(pkg-config) --libs-only-L --libs-only-other pangocairo pangoft2)',
+                ],
+                'libraries': [
+                  '<!@(<(pkg-config) --libs-only-l pangocairo pangoft2)',
+                ],
+              },
+            }, {
+              'direct_dependent_settings': {
+                'cflags': [
+                  '<!@(pkg-config --cflags pangocairo pangoft2)',
+                ],
+              },
+              'link_settings': {
+                'ldflags': [
+                  '<!@(pkg-config --libs-only-L --libs-only-other pangocairo pangoft2)',
+                ],
+                'libraries': [
+                  '<!@(pkg-config --libs-only-l pangocairo pangoft2)',
+                ],
+              },
+            }],
+          ],
+        },
+      ],
+    }],
   ],  # conditions
   'targets': [
     {
       'target_name': 'dbus',
       'type': 'none',
       'direct_dependent_settings': {
         'cflags': [
           '<!@(<(pkg-config) --cflags dbus-1)',
         ],
       },
@@ skipping 428 matching lines @@
                      'spd_set_synthesis_voice',
                      'spd_list_modules',
                      'spd_set_output_module',
           ],
           'message': 'Generating libspeechd library loader',
           'process_outputs_as_sources': 1,
         },
       ],
     },
     {
-      'target_name': 'pangocairo',
-      'type': 'none',
-      'toolsets': ['host', 'target'],
-      'conditions': [
-        ['_toolset=="target"', {
-          'direct_dependent_settings': {
-            'cflags': [
-              '<!@(<(pkg-config) --cflags pangocairo pangoft2)',
-            ],
-          },
-          'link_settings': {
-            'ldflags': [
-              '<!@(<(pkg-config) --libs-only-L --libs-only-other pangocairo pangoft2)',
-            ],
-            'libraries': [
-              '<!@(<(pkg-config) --libs-only-l pangocairo pangoft2)',
-            ],
-          },
-        }, {
-          'direct_dependent_settings': {
-            'cflags': [
-              '<!@(pkg-config --cflags pangocairo pangoft2)',
-            ],
-          },
-          'link_settings': {
-            'ldflags': [
-              '<!@(pkg-config --libs-only-L --libs-only-other pangocairo pangoft2)',
-            ],
-            'libraries': [
-              '<!@(pkg-config --libs-only-l pangocairo pangoft2)',
-            ],
-          },
-        }],
-      ],
-    },
-    {
       'target_name': 'ssl',
       'type': 'none',
       'conditions': [
         ['_toolset=="target"', {
           'conditions': [
             ['use_openssl==1', {
               'dependencies': [
                 '../../third_party/boringssl/boringssl.gyp:boringssl',
               ],
             }],
@@ skipping 28 matching lines @@
                   '-Wno-header-guard',
                 ],
               },
             }],
           ]
         }],
       ],
     },
   ],
 }