4e461ce12d
This can have important debugging information such as 'cc: not found' or 'ccache: error: Could not find compiler "cc" in PATH'. MFC after: 2 weeks Sponsored by: EMC / Isilon Storage Division
94 lines
2.7 KiB
Makefile
94 lines
2.7 KiB
Makefile
# $FreeBSD$
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# Setup variables for the compiler
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#
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# COMPILER_TYPE is the major type of compiler. Currently gcc and clang support
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# automatic detection. Other compiler types can be shoe-horned in, but require
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# explicit setting of the compiler type. The compiler type can also be set
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# explicitly if, say, you install gcc as clang...
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#
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# COMPILER_VERSION is a numeric constant equal to:
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# major * 10000 + minor * 100 + tiny
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# It too can be overriden on the command line. When testing it, be sure to
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# make sure that you are limiting the test to a specific compiler. Testing
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# against 30300 for gcc likely isn't what you wanted (since versions of gcc
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# prior to 4.2 likely have no prayer of working).
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#
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# COMPILER_FEATURES will contain one or more of the following, based on
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# compiler support for that feature:
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#
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# - c++11 : supports full (or nearly full) C++11 programming environment.
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#
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# This file may be included multiple times, but only has effect the first time.
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#
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.if !target(__<bsd.compiler.mk>__)
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__<bsd.compiler.mk>__:
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# Try to import COMPILER_TYPE and COMPILER_VERSION from parent make.
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# The value is only used/exported for the same environment that impacts
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# CC and COMPILER_* settings here.
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_exported_vars= COMPILER_TYPE COMPILER_VERSION
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_cc_hash= ${CC}${MACHINE}${PATH}
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_cc_hash:= ${_cc_hash:hash}
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# Only import if none of the vars are set somehow else.
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_can_export= yes
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.for var in ${_exported_vars}
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.if defined(${var})
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_can_export= no
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.endif
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.endfor
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.if ${_can_export} == yes
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.for var in ${_exported_vars}
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.if defined(${var}.${_cc_hash})
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${var}= ${${var}.${_cc_hash}}
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.endif
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.endfor
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.endif
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.if ${MACHINE} == "common"
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# common is a pseudo machine for architecture independent
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# generated files - thus there is no compiler.
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COMPILER_TYPE= none
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COMPILER_VERSION= 0
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.elif !defined(COMPILER_TYPE) || !defined(COMPILER_VERSION)
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_v!= ${CC} --version || echo 0.0.0
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.if !defined(COMPILER_TYPE)
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. if ${CC:T:M*gcc*}
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COMPILER_TYPE:= gcc
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. elif ${CC:T:M*clang*}
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COMPILER_TYPE:= clang
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. elif ${_v:Mgcc}
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COMPILER_TYPE:= gcc
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. elif ${_v:M\(GCC\)}
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COMPILER_TYPE:= gcc
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. elif ${_v:Mclang}
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COMPILER_TYPE:= clang
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. else
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.error Unable to determine compiler type for ${CC}. Consider setting COMPILER_TYPE.
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. endif
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.endif
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.if !defined(COMPILER_VERSION)
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COMPILER_VERSION!=echo ${_v:M[1-9].[0-9]*} | awk -F. '{print $$1 * 10000 + $$2 * 100 + $$3;}'
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.endif
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.undef _v
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.endif
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# Export the values so sub-makes don't have to look them up again, using the
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# hash key computed above.
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.for var in ${_exported_vars}
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${var}.${_cc_hash}:= ${${var}}
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.export-env ${var}.${_cc_hash}
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.undef ${var}.${_cc_hash}
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.endfor
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.if ${COMPILER_TYPE} == "clang" || \
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(${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 40800)
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COMPILER_FEATURES= c++11
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.else
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COMPILER_FEATURES=
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.endif
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.endif # !target(__<bsd.compiler.mk>__)
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