Separate building and enabling libevent.

webrtc/build/common.gypi

 # Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 # This file contains common settings for building WebRTC components.
 
 {
   # Nesting is required in order to use variables for setting other variables.
   'variables': {
     'variables': {
       'variables': {
         'variables': {
           # This will already be set to zero by supplement.gypi
           'build_with_chromium%': 1,
 
           # Enable to use the Mozilla internal settings.
           'build_with_mozilla%': 0,
-          'build_for%': '',
         },
-        'build_for%': '<(build_for)',
         'build_with_chromium%': '<(build_with_chromium)',
         'build_with_mozilla%': '<(build_with_mozilla%)',
         'include_opus%': 1,
 
         'conditions': [
           # Include the iLBC audio codec?
           ['build_with_chromium==1 or build_with_mozilla==1', {
             'include_ilbc%': 0,
           }, {
             'include_ilbc%': 1,
           }],
 
           ['build_with_chromium==1', {
             'webrtc_root%': '<(DEPTH)/third_party/webrtc',
             'apk_tests_path%': '<(DEPTH)/third_party/webrtc/build/apk_tests_noop.gyp',
             'modules_java_gyp_path%': '<(DEPTH)/third_party/webrtc/modules/modules_java_chromium.gyp',
           }, {
             'webrtc_root%': '<(DEPTH)/webrtc',
             'apk_tests_path%': '<(DEPTH)/webrtc/build/apk_tests.gyp',
             'modules_java_gyp_path%': '<(DEPTH)/webrtc/modules/modules_java.gyp',
           }],
 
           # Controls whether we use libevent on posix platforms.
-          # TODO(tommi): Remove the 'build_for' condition once libevent is more
-          # widely available in posix configurations.
-          ['OS=="win" or OS=="mac" or OS=="ios" or build_for!=""', {
-            'build_libevent%': 0,
+          # TODO(phoglund): should arguably be controlled by platform #ifdefs
+          # in the code instead.
+          ['OS=="win" or OS=="mac" or OS=="ios"', {
+            'enable_libevent%': 0,
           }, {
-            'build_libevent%': 1,
+            'enable_libevent%': 1,
           }],
         ],
       },
       'build_with_chromium%': '<(build_with_chromium)',
       'build_with_mozilla%': '<(build_with_mozilla)',
-      'build_libevent%': '<(build_libevent)',
+      'enable_libevent%': '<(enable_libevent)',
       'webrtc_root%': '<(webrtc_root)',
       'apk_tests_path%': '<(apk_tests_path)',
       'modules_java_gyp_path%': '<(modules_java_gyp_path)',
       'webrtc_vp8_dir%': '<(webrtc_root)/modules/video_coding/codecs/vp8',
       'webrtc_vp9_dir%': '<(webrtc_root)/modules/video_coding/codecs/vp9',
       'include_ilbc%': '<(include_ilbc)',
       'include_opus%': '<(include_opus)',
       'opus_dir%': '<(DEPTH)/third_party/opus',
     },
     'build_with_chromium%': '<(build_with_chromium)',
     'build_with_mozilla%': '<(build_with_mozilla)',
-    'build_libevent%': '<(build_libevent)',
+    'enable_libevent%': '<(enable_libevent)',
     'webrtc_root%': '<(webrtc_root)',
     'apk_tests_path%': '<(apk_tests_path)',
     'test_runner_path': '<(DEPTH)/webrtc/build/android/test_runner.py',
     'modules_java_gyp_path%': '<(modules_java_gyp_path)',
     'webrtc_vp8_dir%': '<(webrtc_vp8_dir)',
     'webrtc_vp9_dir%': '<(webrtc_vp9_dir)',
     'include_ilbc%': '<(include_ilbc)',
     'include_opus%': '<(include_opus)',
     'rtc_relative_path%': 1,
     'external_libraries%': '0',
@@ skipping 22 matching lines @@
 
     # Enable data logging. Produces text files with data logged within engines
     # which can be easily parsed for offline processing.
     'enable_data_logging%': 0,
 
     # Enables the use of protocol buffers for debug recordings.
     'enable_protobuf%': 1,
 
     # Disable these to not build components which can be externally provided.
     'build_expat%': 1,
+    'build_libevent%': 1,
     'build_json%': 1,
     'build_libjpeg%': 1,
     'build_libsrtp%': 1,
     'build_libvpx%': 1,
     'libvpx_build_vp9%': 1,
     'build_libyuv%': 1,
     'build_openmax_dl%': 1,
     'build_opus%': 1,
     'build_protobuf%': 1,
     'build_ssl%': 1,
@@ skipping 201 matching lines @@
           }],
           ['clang==1', {
             'cflags': [
               '-Wimplicit-fallthrough',
               '-Wthread-safety',
               '-Winconsistent-missing-override',
             ],
           }],
         ],
       }],
-      ['build_libevent==1', {
+      ['enable_libevent==1', {
         'defines': [
           'WEBRTC_BUILD_LIBEVENT',
         ],
       }],
       ['target_arch=="arm64"', {
         'defines': [
           'WEBRTC_ARCH_ARM64',
           'WEBRTC_HAS_NEON',
         ],
       }],
@@ skipping 181 matching lines @@
           # For access to standard POSIXish features, use WEBRTC_POSIX instead
           # of a more specific macro.
           'defines': [
             'WEBRTC_POSIX',
           ],
         }],
       ],
     },
   }, # target_defaults
 }