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Support, to the extent we generate proper command lines, compiling

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with clang 3.3. Useful for test building -current on a -stable system
in individual directories. Potentially useful if we ever want to
support, say, gcc 4.8 or 4.9's new warnings when building with an
external toolchain (but such support not yet committed). Document
the bsd.compiler.mk interface.
This commit is contained in:
Warner Losh 2014-05-10 16:37:44 +00:00
parent f510ecf0ee
commit 999298523e
2 changed files with 31 additions and 9 deletions
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35
share/mk/bsd.compiler.mk
View File

@ -1,27 +1,46 @@
# $FreeBSD$
# Setup variables for the compiler
#
# COMPILTER_TYPE is the major type of compiler. Currently gcc and clang support
# automatic detetion. Other compiler types can be shoe-horned in, but require explicit
# setting of the compiler type. The compiler type can also be set explicitly if, say,
# you install gcc as clang...
#
# COMPILER_VERSION is a numeric constant equal to major * 10000 + minor * 100 + tiny. It
# too can be overriden on the command line. When testing it, be sure to make sure that you
# are limiting the test to a specific compiler. Testing against 30300 for gcc likely isn't
# what you wanted (since versions of gcc prior to 4.2 likely have no prayer of working).
#
# COMPILER_FEATURES will contain one or more of the following, based on compiler support
# for that feature: c++11 (supports full (or nearly full) C++11 programming environment).
#
# This file may be included multiple times, but only has effect the first time.
#
.if !target(__<bsd.compiler.mk>__)
__<bsd.compiler.mk>__:
_v!= ${CC} --version
.if !defined(COMPILER_TYPE)
. if ${CC:T:Mgcc*}
COMPILER_TYPE:= gcc
. elif ${CC:T:Mclang}
COMPILER_TYPE:= clang
. else
_COMPILER_VERSION!= ${CC} --version
. if ${_COMPILER_VERSION:Mgcc}
. elif ${_v:Mgcc}
COMPILER_TYPE:= gcc
. elif ${_COMPILER_VERSION:M\(GCC\)}
. elif ${_v:M\(GCC\)}
COMPILER_TYPE:= gcc
. elif ${_COMPILER_VERSION:Mclang}
. elif ${_v:Mclang}
COMPILER_TYPE:= clang
. else
. else
.error Unable to determine compiler type for ${CC}. Consider setting COMPILER_TYPE.
. endif
. undef _COMPILER_VERSION
. endif
.endif
.if !defined(COMPILER_VERSION)
COMPILER_VERSION!=echo ${_v:M[1-9].[0-9]*} | awk -F. '{print $$1 * 10000 + $$2 * 100 + $$3;}'
.endif
.undef _v
.if ${COMPILER_TYPE} == "clang"
COMPILER_FEATURES= c++11

5
share/mk/bsd.sys.mk
View File

@ -64,7 +64,10 @@ CWARNFLAGS+= -Wno-pointer-sign
# Clang has more warnings enabled by default, and when using -Wall, so if WARNS
# is set to low values, these have to be disabled explicitly.
.if ${WARNS} <= 6
CWARNFLAGS.clang+= -Wno-empty-body -Wno-string-plus-int -Wno-unused-const-variable
CWARNFLAGS.clang+= -Wno-empty-body -Wno-string-plus-int
.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} > 30300
CWARNFLAGS.clang+= -Wno-unused-const-variable
.endif
.endif # WARNS <= 6
.if ${WARNS} <= 3
CWARNFLAGS.clang+= -Wno-tautological-compare -Wno-unused-value\