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Don't fail the build due to clang integer constant range warnings

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This warning checks whether a constant is out of range of the integer
type. An example is `comparison of 'u_int' > 4294967295 is always false`
and in this case the warning makes sense.
However, when the type is a typedef that can be either 64 or 32 bits the
if condition is only tautological in some configurations so this should
not be a warning that fails the build.

Reviewed by:	dim
Approved by:	jhb (mentor)
Differential Revision: https://reviews.freebsd.org/D12912
This commit is contained in:
arichardson 2017-11-29 21:16:14 +00:00
parent 40d9c0da1e
commit a0d914b8b9
1 changed files with 3 additions and 0 deletions
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3
share/mk/bsd.sys.mk
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@ -81,6 +81,9 @@ 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} >= 60000
CWARNFLAGS.clang+= -Wno-error=tautological-constant-compare
.endif
.endif # WARNS <= 3
.if ${WARNS} <= 2
CWARNFLAGS.clang+= -Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter