Add support for Mac OS X 64bit builds with GYP

tools/gyp/v8.gyp

Index: tools/gyp/v8.gyp
diff --git a/tools/gyp/v8.gyp b/tools/gyp/v8.gyp
index 764789a8f4252b7b372e63dc96279c694378d712..c0dbcd2f439d3e1c0ea6e16d602885aea1116784 100644
--- a/tools/gyp/v8.gyp
+++ b/tools/gyp/v8.gyp
@@ -59,6 +59,9 @@
                 '../../src/v8dll-main.cc',
               ],
               'conditions': [
+                ['OS=="mac"', {
+                  'xcode_settings': {'OTHER_LDFLAGS': ['-dynamiclib', '-all_load']},

[Jakob Kummerow, 2012/03/28 16:08:51]

80 cols per line, please.

[fdmanana, 2012/03/28 16:49:29]

Ops, sorry :)

+                }],
                 ['OS=="win"', {
                   'defines': [
                     'BUILDING_V8_SHARED',
@@ -536,7 +539,7 @@
                 '../../src/arm/stub-cache-arm.cc',
               ],
             }],
-            ['v8_target_arch=="ia32" or v8_target_arch=="mac" or OS=="mac"', {
+            ['v8_target_arch=="ia32"', {

[Jakob Kummerow, 2012/03/28 16:08:51]

From crbug.com/44205, I gather that it should be possible to choose the
architecture from within Xcode; v8_target_arch=="mac" (or target_arch=="mac", I
don't care) seems to be how the desire to have this option is indicated. Can you
make that work?
Alternatively, would you mind leaving the 'v8_target_arch=="mac"' condition in
so that any progress in that area is not hampered?

[fdmanana, 2012/03/28 16:49:29]

Ok, I'll leave this as it was before. I found it weird that both the ia32 and
x64 versions were being compiled and assembled into the same .a file (which
worked fine, I just felt odd and thought it could be an unintentional
condition).

               'sources': [
                 '../../src/ia32/assembler-ia32-inl.h',
                 '../../src/ia32/assembler-ia32.cc',
@@ -601,7 +604,7 @@
                 '../../src/mips/stub-cache-mips.cc',
               ],
             }],
-            ['v8_target_arch=="x64" or v8_target_arch=="mac" or OS=="mac"', {
+            ['v8_target_arch=="x64"', {
               'sources': [
                 '../../src/x64/assembler-x64-inl.h',
                 '../../src/x64/assembler-x64.cc',