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kern.mk: -Wno-error=stringop-overflow for gcc due to false positives

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Demote gcc's Wstringop-overflow to Wno-error due to false positives.
E.g. the riscv64 build with gcc 8.3.0 has been failing with this warning
since r355062 [1].  A bug has been filed with gcc [2].  The warning was
first introduced in gcc 7.1 [3]. Hopefully we can avoiding suppressing
the warning in future gcc versions.

[1] https://ci.freebsd.org/job/FreeBSD-head-riscv64-build/16691/
[2] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92718
[3] https://gcc.gnu.org/wiki/WarningHistory

Reviewed by:	markj
Sponsored by:	Dell EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D22603
This commit is contained in:
Ryan Libby 2019-11-29 06:25:07 +00:00
parent 815db2f6f8
commit 88eb44d74f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=355208
1 changed files with 3 additions and 0 deletions
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3
sys/conf/kern.mk
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@ -61,6 +61,9 @@ CWARNEXTRA+= -Wno-error=misleading-indentation \
-Wno-error=shift-overflow \
-Wno-error=tautological-compare
.endif
.if ${COMPILER_VERSION} >= 70100
CWARNEXTRA+= -Wno-error=stringop-overflow
.endif
.if ${COMPILER_VERSION} >= 70200
CWARNEXTRA+= -Wno-error=memset-elt-size
.endif