Linux: make compile-time dependency on gnome-keyring optional.

build/linux/system.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.
 
 {
   'conditions': [
     ['sysroot!=""', {
       'variables': {
         'pkg-config': './pkg-config-wrapper "<(sysroot)"',
       },
@@ skipping 241 matching lines @@
             'libraries': [
               '-lselinux',
             ],
           },
       }]]
     },
     {
       'target_name': 'gnome-keyring',
       'type': 'settings',
       'conditions': [
-        ['chromeos==0', {
+        ['use_gnome_keyring==1', {

[Evan Martin, 2010/09/15 21:28:27]

Is this still necessary?  Won't this target be unused when use_gnome_keyring is
0, so this won't be evaluated anyway?

...I'm not sure, so I'm asking you.  :)

[Paweł Hajdan Jr., 2010/09/15 21:56:03]

I was getting errors without this if gnome-keyring was not present on the system
(gyp would still evaluate and execute the command).

           'direct_dependent_settings': {
             'cflags': [
               '<!@(<(pkg-config) --cflags gnome-keyring-1)',
             ],
+            'defines': [
+              'USE_GNOME_KEYRING',
+            ],
             'conditions': [
               ['linux_link_gnome_keyring==0', {
                 'defines': ['DLOPEN_GNOME_KEYRING'],
               }],
             ],
           },
           'conditions': [
             ['linux_link_gnome_keyring!=0', {
               'link_settings': {
                 'ldflags': [
@@ skipping 41 matching lines @@
       },
     },
   ],
 }
 
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