Make GYP build usable for day-to-day work

Make GYP build usable for day-to-day work

- Introduce a global Makefile that triggers GYP-based building
- Some fixes to .gyp[i] files to make everything work
- tools/test-wrapper-gypbuild.py as a temporary solution for easy testing

Committed: http://code.google.com/p/v8/source/detail?r=8674

[Jakob Kummerow, 2011-07-15 10:51:20]

Everyone: please take a look. Test it. Comment on it. Report issues. Complain
about the workflow. Tell me what you think.

Basic usage:
Go to your base v8 dir, run "make -jX" to build (with X threads) and
"tools/test-wrapper-gypbuild.py" to test. 

Advanced usage: 
For more fine-grained make targets, look at the Makefile. E.g. you can make
"ia32", "ia32.debug", "ia32.release", or "ia32.release.check" -- the latter will
build ia32.release and then run tests for it. 
The GYP build supports distcc. If you have a bunch of fast machines around
running distccd, simply 'export CXX="distcc g++"' in your shell and then 'make
-j100' :-)
The "...check" targets ignore the -jX flag when they start tests, because tests
run locally. To control the number of tests performed concurrently, call e.g.
"make ia32.check -j100 TESTJOBS=-j8" (default is TESTJOBS=-j16).
For more details on test-wrapper-gypbuild.py, run it with --help and/or look at
its source. It conforms almost exactly to the old test.py script's interface.

Good news:
- make is a lot faster than scons, especially for incremental builds. Distcc
considerably reduces the time needed for clean builds of all targets at once.
- ia32 and x64 tests run significantly faster when built with make. Shorter
development cycles -- yay :-)

Bad news:
- ARM tests run significantly slower when built with make (on my machine, ~7min
instead of ~5min), and a couple of them even time out. I haven't yet been able
to find out why, and would be glad to receive any hints/ideas/pointers.

Not tested yet (will do that shortly as time permits):
- generating VS or Xcode project files
- compiling V8 inside chromium
- ARM cross-compilation (as opposed to the simulator)

[Mads Ager (chromium), 2011-07-15 11:24:01]

LGTM

[mnaganov (inactive), 2011-07-15 12:25:45]

http://codereview.chromium.org/7383006/diff/1/preparser/preparser.gyp
File preparser/preparser.gyp (right):

http://codereview.chromium.org/7383006/diff/1/preparser/preparser.gyp#newcode29
preparser/preparser.gyp:29: #'target_defaults': {
Do you need these commented out lines?

[Jakob Kummerow, 2011-07-15 12:29:54]

http://codereview.chromium.org/7383006/diff/1/preparser/preparser.gyp
File preparser/preparser.gyp (right):

http://codereview.chromium.org/7383006/diff/1/preparser/preparser.gyp#newcode29
preparser/preparser.gyp:29: #'target_defaults': {
On 2011/07/15 12:25:45, Mikhail Naganov (Chromium) wrote:
> Do you need these commented out lines?

Done.