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| author | John Baldwin <jhb@FreeBSD.org> | 2022-12-21 18:47:08 +0000 |
|---|---|---|
| committer | John Baldwin <jhb@FreeBSD.org> | 2022-12-21 18:48:15 +0000 |
| commit | 1aa6d44decb33ce3eab0efe5336b75fa2dfa3733 (patch) | |
| tree | 9ebdeb0b3c28119f07348c3eb9ca17feb43d8b28 | |
| parent | 2637ed558baacdab7a8cf789dca713bde5843e43 (diff) | |
| download | src-1aa6d44decb33ce3eab0efe5336b75fa2dfa3733.tar.gz src-1aa6d44decb33ce3eab0efe5336b75fa2dfa3733.zip | |
Disable -Wzero-length-bounds for the kernel for GCC 12.
The mlx5 driver and some other OFED bits use a somewhat dubious
pattern of:
struct foo {
uint64_t arg[0];
/* Real members of a struct */
};
The code then treats 'arg' as if it were really a kind of union
such that foo.arg[N] functions similarly to (uint64_t *)foo[N].
This uses of foo.arg[N] then trigger this warning.
No real bugs were found by this warning though, so just turn it off
globally.
Reviewed by: hselasky, kib
Differential Revision: https://reviews.freebsd.org/D37630
| -rw-r--r-- | sys/conf/kern.mk | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sys/conf/kern.mk b/sys/conf/kern.mk index 5231a289981e..65cf86375cce 100644 --- a/sys/conf/kern.mk +++ b/sys/conf/kern.mk @@ -79,7 +79,8 @@ CWARNEXTRA+= -Wno-address-of-packed-member \ -Wno-error=alloca-larger-than= .if ${COMPILER_VERSION} >= 120100 CWARNEXTRA+= -Wno-error=nonnull \ - -Wno-dangling-pointer + -Wno-dangling-pointer \ + -Wno-zero-length-bounds .endif .endif |