Messages in this thread | | | From | David Laight <> | Subject | RE: [PATCH] gcov: support GCC 12.1 and newer compilers | Date | Mon, 17 Oct 2022 11:38:24 +0000 |
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From: Andrew Morton > Sent: 17 October 2022 01:41 .. > The changelog doesn't tell us what the user-visible effects of this are > (please, it should do so), but it sounds to me like those effects are > "gcov is utterly busted". > > So I'll add a cc:stable to this, so that people can use new gcc > versions to build older kernels.
I can't help wondering what happens if you link a binary compiled with an old gcc with one build with a new gcc?
This could easily happen with out of tree loadable modules. Or just linking an old .a file into a userspace binary.
Now maybe the gcov data isn't used (I've not looked up what it is for) but is sounds like something whose format should be set in stone?
David
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