Remove -Os from gyp C++ flags if it exists, since v8 uses -O3.

Remove -Os from gyp C++ flags if it exists, since v8 uses -O3.

[Evan Martin, 2009-11-23 23:53:41]

(Review list found by looking at log)

What we really want to do is strip all optimization flags since we provide our
own.  But this hack seems to work ok.

[Mads Ager (chromium), 2009-11-24 11:04:43]

LGTM

I'll land this change in bleeding_edge V8.

Does this change have an effect on the optimization level for V8 in any current
build?  In particular, does this effect the optimization level of the Chrome 4
branch?

[Evan Martin, 2009-11-24 18:12:30]

Inline comment describing better what I did

http://codereview.chromium.org/439014/diff/1/2
File tools/gyp/v8.gyp (right):

http://codereview.chromium.org/439014/diff/1/2#newcode88
tools/gyp/v8.gyp:88: '-O3',
Here, you can see that -O3 is introduced.  So the change I made only removes -Os
if it's present, since we want -O3 to always stick.

[Evan Martin, 2009-11-24 18:13:04]

(I am looking into building Chrome with -Os, but v8 won't compile with it set
anyway...)