For building v8 using gn on aix_ppc64, linux_s390x and linux_ppc64.

infra/mb/mb_config.pyl

 # Copyright 2016 The V8 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.
 
 {
   # This is a map of buildbot master names -> buildbot builder names ->
   # config names (where each config name is a key in the 'configs' dict,
   # below). MB uses this dict to look up which config to use for a given bot.
   # Bots are ordered by appearance on waterfall.
   'masters': {
@@ skipping 47 matching lines @@
       'V8 Linux - shared': 'gn_release_x86_shared_verify_heap',
       'V8 Linux - noi18n - debug': 'gn_debug_x86_no_i18n',
       'V8 Linux - verify csa': 'gn_release_x86_verify_csa',
       # Linux64.
       'V8 Linux64 - builder': 'gn_release_x64_valgrind',
       'V8 Linux64 - debug builder': 'gn_debug_x64_valgrind',
       'V8 Linux64 - custom snapshot - debug builder': 'gn_debug_x64_custom',
       'V8 Linux64 - internal snapshot': 'gn_release_x64_internal',
       'V8 Linux64 - gyp': 'gyp_release_x64',
       'V8 Linux64 - verify csa': 'gn_release_x64_verify_csa',
+      # aix64
+      'V8 Aix64': 'gn_release_ppc64',

[Michael Achenbach, 2017/04/18 13:56:22]

Please do the mb_config.pyl change in a separate CL. After the gn support CL
lands, we can check for flag differences on the bots in:
https://build.chromium.org/p/client.v8.ports/builders/V8%20Linux%20-%20ppc64%...

You should also switch the beta/stable bots in the same CL and remove the
corresponding gyp config. The bots will first really switch when the CL
propagates to the branch.

       # Windows.
       'V8 Win32 - builder': 'gn_release_x86_minimal_symbols',
       'V8 Win32 - debug builder': 'gn_debug_x86_minimal_symbols',
       'V8 Win32 - nosnap - shared':
         'gn_release_x86_no_snap_shared_minimal_symbols',
       'V8 Win64': 'gn_release_x64_minimal_symbols',
       'V8 Win64 - debug': 'gn_debug_x64_minimal_symbols',
       # TODO(machenbach): Switch plugins on when errors are fixed.
       'V8 Win64 - clang': 'gn_release_x64_clang',
       # Mac.
@@ skipping 195 matching lines @@
     'default_optdebug_s390x': [
       'gn', 'debug', 'simulate_s390x', 'v8_enable_slow_dchecks'],
     'default_release_s390x': [
       'gn', 'release', 'simulate_s390x'],
     'default_debug_x64': [
       'gn', 'debug', 'x64', 'v8_enable_slow_dchecks', 'v8_full_debug'],
     'default_optdebug_x64': [
       'gn', 'debug', 'x64', 'v8_enable_slow_dchecks'],
     'default_release_x64': [
       'gn', 'release', 'x64'],
+    'default_release_ppc64': [
+      'gn', 'release', 'ppc64'],
     'default_debug_x86': [
       'gn', 'debug', 'x86', 'v8_enable_slow_dchecks', 'v8_full_debug'],
     'default_optdebug_x86': [
       'gn', 'debug', 'x86', 'v8_enable_slow_dchecks'],
     'default_release_x86': [
       'gn', 'release', 'x86'],
 
 
     # GN debug configs for simulators.
     'gn_debug_simulate_arm': [
@@ skipping 70 matching lines @@
     'gn_release_x64_tsan_minimal_symbols': [
       'gn', 'release_bot', 'x64', 'tsan', 'minimal_symbols', 'swarming'],
     'gn_release_x64_valgrind': [
       'gn', 'release_bot', 'x64', 'swarming', 'valgrind'],
     'gn_release_x64_valgrind_trybot': [
       'gn', 'release_trybot', 'x64', 'swarming', 'valgrind'],
     'gn_release_x64_verify_csa': [
       'gn', 'release_bot', 'x64', 'swarming', 'dcheck_always_on',
       'v8_enable_slow_dchecks', 'v8_verify_csa'],
 
+    # GN release configs for ppc64.
+    'gn_release_ppc64': [
+      'gn', 'release_bot', 'ppc64', 'swarming'],
+
     # GN debug configs for x64.
     'gn_debug_x64': [
       'gn', 'debug_bot', 'x64', 'swarming'],
     'gn_debug_x64_asan_edge': [
       'gn', 'debug_bot', 'x64', 'asan', 'lsan', 'edge'],
     'gn_debug_x64_custom': [
       'gn', 'debug_bot', 'x64', 'swarming', 'v8_snapshot_custom'],
     'gn_debug_x64_minimal_symbols': [
       'gn', 'debug_bot', 'x64', 'minimal_symbols', 'swarming'],
     'gn_debug_x64_trybot': [
@@ skipping 210 matching lines @@
       'gyp_defines': 'target_arch=mips',
     },
 
     'msan': {
       'gn_args': ('is_msan=true msan_track_origins=2 '
                   'use_prebuilt_instrumented_libraries=true'),
       'gyp_defines': ('clang=1 msan=1 msan_track_origins=2 '
                       'use_prebuilt_instrumented_libraries=1'),
     },
 
+    'ppc64': {
+       'gn_args': 'target_cpu="ppc64"',
+    },
+
     'release': {
       'gn_args': 'is_debug=false',
     },
 
     'release_bot': {
       'mixins': ['release', 'static', 'goma'],
     },
 
     'release_trybot': {
       'mixins': ['release_bot', 'minimal_symbols', 'dcheck_always_on'],
@@ skipping 152 matching lines @@
       'gn_args': 'target_cpu="x64"',
       'gyp_defines': 'target_arch=x64',
     },
 
     'x86': {
       'gn_args': 'target_cpu="x86"',
       'gyp_defines': 'target_arch=ia32',
     },
   },
 }