Introduce a setting to control the toolset for which d8 is compiled

BUG=v8:1775
R=machenbach@chromium.org
LOG=y

Review URL: https://codereview.chromium.org/138273016

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18656 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

build/toolchain.gypi

@@ -70,6 +70,11 @@
     # it's handled in build/standalone.gypi.
     'want_separate_host_toolset%': 1,
 
+    # Toolset the d8 binary should be compiled for. Possible values are 'host'
+    # and 'target'. If you want to run v8 tests, it needs to be set to 'target'.
+    # The setting is ignored if want_separate_host_toolset is 0.
+    'v8_toolset_for_d8%': 'target',
+
     'host_os%': '<(OS)',
     'werror%': '-Werror',
     # For a shared library build, results in "libv8-<(soname_version).so".

src/d8.gyp

@@ -32,6 +32,7 @@
     # Enable support for Intel VTune. Supported on ia32/x64 only
     'v8_enable_vtunejit%': 0,
     'v8_enable_i18n_support%': 1,
+    'v8_toolset_for_d8%': 'target',
   },
   'includes': ['../build/toolchain.gypi', '../build/features.gypi'],
   'targets': [
@@ -49,6 +50,9 @@
         'd8.cc',
       ],
       'conditions': [
+        [ 'want_separate_host_toolset==1', {
+          'toolsets': [ '<(v8_toolset_for_d8)', ],
+        }],
         [ 'console=="readline"', {
           'libraries': [ '-lreadline', ],
           'sources': [ 'd8-readline.cc' ],