[google] Add -gfission support to GCC (issue 5754090)

[saugustine@google.com]

On 2012/03/12 21:32:46, Cary wrote:
> [Revised patch to fix problem with ASM_FINAL_SPEC in the case where
> neither -c nor -o are specified.]

> Add GCC support for -gfission option.  Debug info is partitioned
> into skeleton sections that will remain in the .o file, and "dwo"
> sections that will be moved to a .dwo file.  After compilation,
> the gcc driver calls objcopy twice: once to extract the "dwo"
> sections into the .dwo file, and a second time to remove the
> sections from the .o file.

> For google/gcc-4_6 branch. (To be submitted for trunk soon.)

I approve for google/gcc-4_6.

Sterling

http://codereview.appspot.com/5754090/