MIPS: Enabled native/cross-compilation for MIPS targets in the gyp system.

build/common.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
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@@ skipping 151 matching lines @@
           ['v8_target_arch=="ia32"', {
             'defines': [
               'V8_TARGET_ARCH_IA32',
             ],
           }],
           ['v8_target_arch=="mips"', {
             'defines': [
               'V8_TARGET_ARCH_MIPS',
             ],
             'conditions': [
+              [ 'target_arch=="mips"', {
+                'target_conditions': [
+                  ['_toolset=="target"', {
+                    'cflags': ['-EL'],
+                    'ldflags': ['-EL'],
+                    'conditions': [
+                      [ 'v8_use_mips_abi_hardfloat=="true"', {
+                        'cflags': ['-mhard-float'],
+                        'ldflags': ['-mhard-float'],
+                      }, {
+                        'cflags': ['-msoft-float'],
+                        'ldflags': ['-msoft-float'],
+                      }],
+                      ['mips_arch_variant=="mips32r2"', {
+                        'cflags': ['-mips32r2', '-Wa,-mips32r2'],
+                      }, {
+                        'cflags': ['-mips32', '-Wa,-mips32'],
+                      }],
+                    ],
+                  }],
+                ],
+              }],
               [ 'v8_can_use_fpu_instructions=="true"', {
                 'defines': [
                   'CAN_USE_FPU_INSTRUCTIONS',
                 ],
               }],
               [ 'v8_use_mips_abi_hardfloat=="true"', {
                 'defines': [
                   '__mips_hard_float=1',
                   'CAN_USE_FPU_INSTRUCTIONS',
                 ],
               }, {
                 'defines': [
                   '__mips_soft_float=1'
                 ],
               }],
+              ['mips_arch_variant=="mips32r2"', {

[Jakob Kummerow, 2012/02/08 13:07:34]

This works for now, but it's a bit brittle: it forces you to specify some value
for mips_arch_variant whenever v8_target_arch=="mips", or gyp will fail. I'd
suggest to add a default value to the top of this file (see the other examples
there for the %-notation).

+                'defines': ['_MIPS_ARCH_MIPS32R2',],
+              }],
               # The MIPS assembler assumes the host is 32 bits,
               # so force building 32-bit host tools.
               ['host_arch=="x64"', {
                 'target_conditions': [
                   ['_toolset=="host"', {
                     'cflags': ['-m32'],
                     'ldflags': ['-m32'],
                   }],
                 ],
               }],
@@ skipping 161 matching lines @@
                 # some test cases can cause stack overflow.
                 # 'StackReserveSize': '297152',
               },
             },
           }],  # OS=="win"
         ],  # conditions
       },  # Release
     },  # configurations
   },  # target_defaults
 }