Make some small Mac-specific modifications to V8 to make it work on MacOS X 1...

Make some small Mac-specific modifications to V8 to make it work on MacOS X 10.4 rather than just 10.5 and up.
1: Set the right compile flags and predefines to get backward compatible Unix system calls.
2: Explicitly weak import the functions in execinfo.h and check at runtime to see if that library loaded before calling backtrace().

[iposva, 2009-06-17 21:03:23]

LGTM after comments.

Please verify that the modifications do work for you, upload a new change and I
can commit it for you.

-Ivan

http://codereview.chromium.org/126241/diff/1/3
File SConstruct (right):

http://codereview.chromium.org/126241/diff/1/3#newcode130
Line 130: ['OS_MACOSX', 'OS_MACOSX']]
As far as I was told these defines are not needed. The compiler driver will set
them automatically when -mmacosx-version-min is set. I verified this by building
with these CPPDEFINES removed. Please remove them as we are trying to keep the
amount of defines to a minimum.

http://codereview.chromium.org/126241/diff/1/3#newcode654
Line 654: 
Thanks!

[maf, 2009-06-18 00:03:24]

On 2009/06/18 00:01:35, maf wrote:
> 

Done. . Removed the CPPDEFINES and just as you said, it still works on 10.4.
Thanks.