Make the Mac build work.

Make the Mac build work.

This adds some support for objective C invocation. There are some weird harcoded stuff.

BUG=
R=scottmg@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=215948

[scottmg, 2013-08-05 12:24:47]

lgtm

https://codereview.chromium.org/21983003/diff/1/tools/gn/input_file.h
File tools/gn/input_file.h (right):

https://codereview.chromium.org/21983003/diff/1/tools/gn/input_file.h#newcode18
tools/gn/input_file.h:18: InputFile(const SourceFile& name);
explicit?

https://codereview.chromium.org/21983003/diff/1/tools/gn/ninja_helper.cc
File tools/gn/ninja_helper.cc (right):

https://codereview.chromium.org/21983003/diff/1/tools/gn/ninja_helper.cc#newc...
tools/gn/ninja_helper.cc:14: const char kLibDirWithSlash[] = "lib/";
heh

https://codereview.chromium.org/21983003/diff/1/tools/gn/ninja_target_writer.cc
File tools/gn/ninja_target_writer.cc (right):

https://codereview.chromium.org/21983003/diff/1/tools/gn/ninja_target_writer....
tools/gn/ninja_target_writer.cc:519: out_ << "  postbuilds = $ && (export
BUILT_PRODUCTS_DIR=/Users/brettw/prj/src/out/gn; export CONFIGURATION=Debug;
export DYLIB_INSTALL_NAME_BASE=@rpath; export EXECUTABLE_NAME=libbase.dylib;
export EXECUTABLE_PATH=libbase.dylib; export FULL_PRODUCT_NAME=libbase.dylib;
export LD_DYLIB_INSTALL_NAME=@rpath/libbase.dylib; export MACH_O_TYPE=mh_dylib;
export PRODUCT_NAME=base; export
PRODUCT_TYPE=com.apple.product-type.library.dynamic; export
SDKROOT=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.7.sdk;
export SRCROOT=/Users/brettw/prj/src/out/gn/../../base; export
SOURCE_ROOT=\"$${SRCROOT}\"; export
TARGET_BUILD_DIR=/Users/brettw/prj/src/out/gn; export TEMP_DIR=\"$${TMPDIR}\";
(cd ../../base && ../build/mac/strip_from_xcode); G=$$?; ((exit $$G) || rm -rf
libbase.dylib) && exit $$G)";
¯\_(ツ)_/¯

[brettw, 2013-08-06 19:36:30]

Committed patchset #4 manually as r215948 (presubmit successful).