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Subject: [Bug build/26647] [-Werror=array-parameter=] due to different
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Date: Fri, 30 Oct 2020 21:38:55 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D26647

--- Comment #7 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gn=
u.org> ---
The master branch has been updated by Joseph Myers <jsm28@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=3Dglibc.git;h=3D2098d4034d398cbde6c=
cd4a2aaac52c518374698

commit 2098d4034d398cbde6ccd4a2aaac52c518374698
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Fri Oct 30 21:38:31 2020 +0000

    Disable spurious -Wstringop-overflow for setjmp/longjmp (bug 26647)

    Building glibc with GCC 11 fails with (among other warnings) spurious
    -Wstringop-overflow warnings from calls to setjmp and longjmp with a
    pointer to a pthread_unwind_buf that is smaller than jmp_buf.  As
    discussed in bug 26647, the warning in libc-start.c is a false
    positive, because setjmp and longjmp do not access anything (the
    signal mask) beyond the common prefix of the two structures, so this
    patch disables the warning for that call to setjmp, as well as for two
    calls in NPTL code that produce the same warning and look like false
    positives for the same reason.

    Tested with build-many-glibcs.py for arm-linux-gnueabi, where this
    allows the build to get further.

    Reviewed-by: DJ Delorie <dj@redhat.com>

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