Linux: use generated library loader for libspeechd.

This is a reland of https://codereview.chromium.org/11415243/
hopefully with a fix for ChromeOS.

TBR=dmazzoni

BUG=162733

Review URL: https://codereview.chromium.org/11615028

git-svn-id: http://src.chromium.org/svn/trunk/src/build@173748 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

linux/system.gyp

@@ -13,6 +13,7 @@
     ],
 
     'linux_link_libpci%': 0,
+    'linux_link_libspeechd%': 0,
   },
   'conditions': [
     [ 'os_posix==1 and OS!="mac"', {
@@ -382,6 +383,62 @@
         },
       ],
     },
+    {
+      'target_name': 'libspeechd',
+      'type': 'static_library',
+      'dependencies': [
+        '../../base/base.gyp:base',
+      ],
+      'direct_dependent_settings': {
+        'include_dirs': [
+          '<(SHARED_INTERMEDIATE_DIR)',
+        ],
+        'conditions': [
+          ['linux_link_libspeechd==1', {
+            'link_settings': {
+              'libraries': [
+                '-lspeechd',
+              ],
+            }
+          }],
+        ],
+      },
+      'hard_dependency': 1,
+      'actions': [
+        {
+          'variables': {
+            'output_h': '<(SHARED_INTERMEDIATE_DIR)/library_loaders/libspeechd.h',
+            'output_cc': '<(INTERMEDIATE_DIR)/libspeechd_loader.cc',
+            'generator': '../../tools/generate_library_loader/generate_library_loader.py',
+          },
+          'action_name': 'generate_libspeechd_loader',
+          'inputs': [
+            '<(generator)',
+          ],
+          'outputs': [
+            '<(output_h)',
+            '<(output_cc)',
+          ],
+          'action': ['python',
+                     '<(generator)',
+                     '--name', 'LibSpeechdLoader',
+                     '--output-h', '<(output_h)',
+                     '--output-cc', '<(output_cc)',
+                     '--header', '<libspeechd.h>',
+                     '--link-directly=<(linux_link_libspeechd)',
+                     'spd_open',
+                     'spd_say',
+                     'spd_stop',
+                     'spd_close',
+                     'spd_set_notification_on',
+                     'spd_set_voice_rate',
+                     'spd_set_voice_pitch',
+          ],
+          'message': 'Generating libspeechd library loader.',
+          'process_outputs_as_sources': 1,
+        },
+      ],
+    },
     {
       'target_name': 'x11',
       'type': 'none',