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| author | Joseph Myers <joseph@codesourcery.com> | 2020-10-30 21:38:31 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2020-10-30 21:38:31 +0000 |
| commit | 2098d4034d398cbde6ccd4a2aaac52c518374698 (patch) | |
| tree | 084187792f130c01300200927c0b3307967547b6 /support/xmmap.c | |
| parent | 961d12d9471f0178441e67e073ba2f3085cf20f1 (diff) | |
| download | glibc-2098d4034d398cbde6ccd4a2aaac52c518374698.tar.gz glibc-2098d4034d398cbde6ccd4a2aaac52c518374698.tar.xz glibc-2098d4034d398cbde6ccd4a2aaac52c518374698.zip | |
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>
Diffstat (limited to 'support/xmmap.c')
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