Propagate CC, CXX variables to Webcore and v8

Propagate CC, CXX variables to Webcore and v8.

I realize this will all go away Any Day Now. Until then, we can speed things up a bit more.

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=12425

[Evan Martin, 2009-03-24 23:30:08]

http://codereview.chromium.org/53029/diff/1/2
File build/SConscript.v8 (right):

http://codereview.chromium.org/53029/diff/1/2#newcode32
Line 32: '-j %d ' % GetOption('num_jobs')),
We had had this before, but it ends up being overly parallel.

Say you have -j10 normally.  Then one of those ten workers gets to this build
file and says, "ok, time to spawn scons".  That then spawns the v8 scons with
-j10 as well, and now you have 9 workers working on the chrome build, one
waiting for the v8 build, and 10 more working on the v8 build, for a total of 20
workers.

http://codereview.chromium.org/53029/diff/1/4
File webkit/build/WebCore/SConscript (right):

http://codereview.chromium.org/53029/diff/1/4#newcode41
Line 41: env['ENV'][envvar] = os.environ[envvar]
Rather than copying this code from the main SConscript, maybe you can add a
function to environments with a name like CopyChromeEnvVars?

Actually, now that I write that I'm unsure why this is necessary -- aren't we
already getting these pulled in by virtue of sourcing the main SConscript?

[Lei Zhang, 2009-03-24 23:36:51]

Aww, we're down to a 1 line change now.

[Evan Martin, 2009-03-25 00:35:50]

On 2009/03/24 23:36:51, Lei Zhang wrote:
> Aww, we're down to a 1 line change now.

LGTM