linux-kernel - Re: [PATCH 6/7] kbuild: make source and include paths absolute

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Message-ID: <g0s09p$o7h$1@ger.gmane.org>
Date:	Mon, 19 May 2008 13:45:29 +0000 (UTC)
From:	Jan Blunck <jblunck@...e.de>
To:	linux-kernel@...r.kernel.org
Subject:  Re: [PATCH 6/7] kbuild: make source and include paths absolute

On Mon, 19 May 2008 10:44:56 +0200, Peter Oberparleiter wrote:

> From: Peter Oberparleiter <peter.oberparleiter@...ibm.com>
> 
> Change all source and include paths to absolute form when
> CONFIG_GCOV_PROFILE is enabled.
> 
> Example:
> 
>   gcc -Idir1 -c a.c -o a.o
> 
> will become
> 
>   gcc -I/path/to/dir1 -c /path/to/a.c -o a.o
> 
> Required by the gcov profiling infrastructure: when compiling with
> option -fprofile-arcs, gcc stores file names inside object files.
> Relative paths prevent the gcov tool from finding corresponding source
> files.

I think it would be good to fix this in the gcov tool. When I think
of distribution kernels the source usually ends up in a different
place in the packages than the kernel was originally compiled. So
it would be good to extend gcov here or let it search in well known
locations first (/usr/src/linux, /usr/src/debug/...).

Cheers,
Jan

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