PPC: Force PPC linux to use gcc and gcc 4.8.3 changes for AIX

build/standalone.gypi

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 68 matching lines @@
           'gomadir': '<!(/bin/echo -n ${HOME}/goma)',
         }],
       ],
     },
     'host_arch%': '<(host_arch)',
     'target_arch%': '<(target_arch)',
     'v8_target_arch%': '<(v8_target_arch)',
     'werror%': '-Werror',
     'use_goma%': '<(use_goma)',
     'gomadir%': '<(gomadir)',
-    'host_clang%': '1',
 
     # .gyp files or targets should set v8_code to 1 if they build V8 specific
     # code, as opposed to external code.  This variable is used to control such
     # things as the set of warnings to enable, and whether warnings are treated
     # as errors.
     'v8_code%': 0,
 
     # Speeds up Debug builds:
     # 0 - Compiler optimizations off (debuggable) (default). This may
     #     be 5x slower than Release (or worse).
@@ skipping 45 matching lines @@
         (OS=="linux" or OS=="mac")', {
         'v8_enable_gdbjit%': 1,
       }, {
         'v8_enable_gdbjit%': 0,
       }],
       ['(OS=="linux" or OS=="mac") and (target_arch=="ia32" or target_arch=="x64")', {
         'clang%': 1,
       }, {
         'clang%': 0,
       }],
+      ['host_arch!="ppc" and host_arch!="ppc64" and host_arch!="ppc64le"', {
+        'host_clang%': '1',
+      }, {
+        'host_clang%': '0',
+      }],
     ],
     # Default ARM variable settings.
     'arm_version%': 'default',
     'arm_fpu%': 'vfpv3',
     'arm_float_abi%': 'default',
     'arm_thumb': 'default',
 
     # Default MIPS variable settings.
     'mips_arch_variant%': 'r2',
     # Possible values fp32, fp64, fpxx.
     # fp32 - 32 32-bit FPU registers are available, doubles are placed in
     #        register pairs.
     # fp64 - 32 64-bit FPU registers are available.
     # fpxx - compatibility mode, it chooses fp32 or fp64 depending on runtime
     #        detection
     'mips_fpu_mode%': 'fp32',
   },
   'target_defaults': {
     'variables': {
       'v8_code%': '<(v8_code)',
     },
     'default_configuration': 'Debug',
     'configurations': {
       'DebugBaseCommon': {
-        'cflags': [ '-g', '-O0' ],
         'conditions': [
-          [ 'OS=="aix"', {
-            'cflags': [ '-gxcoff' ],
+          ['OS=="aix"', {
+            'cflags': [ '-g', '-Og', '-gxcoff' ],
+          }, {
+            'cflags': [ '-g', '-O0' ],
           }],
         ],
       },
       'Optdebug': {
         'inherit_from': [ 'DebugBaseCommon', 'DebugBase1' ],
       },
       'Debug': {
         # Xcode insists on this empty entry.
       },
       'Release': {
@@ skipping 384 matching lines @@
     ['use_goma==1 and ("<(GENERATOR)"=="ninja" or clang==1)', {
       'make_global_settings': [
        ['CC_wrapper', '<(gomadir)/gomacc'],
        ['CXX_wrapper', '<(gomadir)/gomacc'],
        ['CC.host_wrapper', '<(gomadir)/gomacc'],
        ['CXX.host_wrapper', '<(gomadir)/gomacc'],
       ],
     }],
   ],
 }