linux-kernel - Re: [PATCH -rc v1] gcov: Disable gcov build with GCC 10

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Message-ID: <0d45fd85-d109-b57f-d918-33d5991e2b09@linux.ibm.com>
Date:   Fri, 11 Sep 2020 17:23:44 +0200
From:   Peter Oberparleiter <oberpar@...ux.ibm.com>
To:     David Laight <David.Laight@...LAB.COM>,
        "'Linus Torvalds'" <torvalds@...ux-foundation.org>
Cc:     Leon Romanovsky <leon@...nel.org>,
        Leon Romanovsky <leonro@...dia.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Colin Ian King <colin.king@...onical.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH -rc v1] gcov: Disable gcov build with GCC 10

On 10.09.2020 23:49, David Laight wrote:
> I was wondering what happens if files compiled with different
> versions of gcc get linked together?

This is not supported by GCC. At runtime libgcov will reject all data
from object files compiled with a different GCC version.

-- 
Peter Oberparleiter
Linux on Z Development - IBM Germany