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Disable the new clang 7.0.0 -Watomic-alignment warning ("misaligned or

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large atomic operation may incur significant performance penalty" ) for
arm before armv6.  Since on these older architectures atomic operations
are always translated to libcalls, and this is expected, the warning is
not really useful there.
This commit is contained in:
Dimitry Andric 2018-08-05 18:27:36 +00:00
parent 64b2585ff9
commit 767e12d066
1 changed files with 4 additions and 0 deletions
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4
share/mk/bsd.sys.mk
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@ -80,6 +80,10 @@ CWARNFLAGS.clang+= -Wno-unused-local-typedef
.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 40000
CWARNFLAGS.clang+= -Wno-address-of-packed-member
.endif
.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 70000 && \
${MACHINE_CPUARCH} == "arm" && !${MACHINE_ARCH:Marmv[67]*}
CWARNFLAGS.clang+= -Wno-atomic-alignment
.endif
.endif # WARNS <= 3
.if ${WARNS} <= 2
CWARNFLAGS.clang+= -Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter