[Bug gcov-profile/47618] Collecting multiple profiles and using all for PGO

[xunxun1982 at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47618

xunxun <xunxun1982 at gmail dot com> changed:

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                 CC|                            |xunxun1982 at gmail dot com

--- Comment #3 from xunxun <xunxun1982 at gmail dot com> 2012-07-22 06:56:11 UTC ---
(In reply to comment #1)
> A tool to merge multiple gcda files shoulnd't be very difficult to write. I
> don't think this should be done by the compiler itself, that would greatly
> complicate things. But a separate tool, gcov-merge say, would work, and this
> isn't a big job to create using libgcov (and gcov-dump as an example). You'd
> also be able to merge profile information from different directories.
> 
> Would something like the above work for you?

But for VC and Intel Compiler

they can auto merge all PGO information.

Will we make gcc to have the similar behavior?