166 lines
5.5 KiB
Makefile
166 lines
5.5 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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.include <bsd.opts.mk>
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# Handle ccache after CC is determined, but not if CC/CXX are already
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# overridden with a manual setup.
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.if ${MK_CCACHE_BUILD:Uno} == "yes" && \
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!make(showconfig) && \
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(${CC:M*ccache/world/*} == "" || ${CXX:M*ccache/world/*} == "")
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# CC is always prepended with the ccache wrapper rather than modifying
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# PATH since it is more clear that ccache is used and avoids wasting time
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# for mkdep/linking/asm builds.
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LOCALBASE?= /usr/local
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CCACHE_WRAPPER_PATH?= ${LOCALBASE}/libexec/ccache
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CCACHE_BIN?= ${LOCALBASE}/bin/ccache
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.if exists(${CCACHE_BIN})
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# Export to ensure sub-makes can filter it out for mkdep/linking and
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# to chain down into kernel build which won't include this file.
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.export CCACHE_BIN
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# Expand and export some variables so they may be based on make vars.
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# This allows doing something like the following in the environment:
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# CCACHE_BASEDIR='${SRCTOP:H}' MAKEOBJDIRPREFIX='${SRCTOP:H}/obj'
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.for var in CCACHE_LOGFILE CCACHE_BASEDIR
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.if defined(${var})
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${var}:= ${${var}}
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.export ${var}
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.endif
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.endfor
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# Handle bootstrapped compiler changes properly by hashing their content
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# rather than checking mtime. For external compilers it should be safe
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# to use the more optimal mtime check.
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# XXX: CCACHE_COMPILERCHECK= string:<compiler_version, compiler_build_rev, compiler_patch_rev, compiler_default_target, compiler_default_sysroot>
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.if ${CC:N${CCACHE_BIN}:[1]:M/*} == ""
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CCACHE_COMPILERCHECK?= content
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.else
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CCACHE_COMPILERCHECK?= mtime
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.endif
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.export CCACHE_COMPILERCHECK
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# Remove ccache from the PATH to prevent double calls and wasted CPP/LD time.
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PATH:= ${PATH:C,:?${CCACHE_WRAPPER_PATH}(/world)?(:$)?,,g}
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# Ensure no bogus CCACHE_PATH leaks in which might avoid the in-tree compiler.
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.if !empty(CCACHE_PATH)
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CCACHE_PATH=
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.export CCACHE_PATH
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.endif
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# Override various toolchain vars.
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.for var in CC CXX HOST_CC HOST_CXX
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.if defined(${var}) && ${${var}:M${CCACHE_BIN}} == ""
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${var}:= ${CCACHE_BIN} ${${var}}
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.endif
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.endfor
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# GCC does not need the CCACHE_CPP2 hack enabled by default in devel/ccache.
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# The port enables it due to ccache passing preprocessed C to clang
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# which fails with -Wparentheses-equality, -Wtautological-compare, and
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# -Wself-assign on macro-expanded lines.
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.if defined(COMPILER_TYPE) && ${COMPILER_TYPE} == "gcc"
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CCACHE_NOCPP2= 1
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.export CCACHE_NOCPP2
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.endif
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# Canonicalize CCACHE_DIR for meta mode usage.
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.if !defined(CCACHE_DIR)
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CCACHE_DIR!= ${CCACHE_BIN} -p | awk '$$2 == "cache_dir" {print $$4}'
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.export CCACHE_DIR
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.endif
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.if !empty(CCACHE_DIR) && empty(.MAKE.META.IGNORE_PATHS:M${CCACHE_DIR})
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CCACHE_DIR:= ${CCACHE_DIR:tA}
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.MAKE.META.IGNORE_PATHS+= ${CCACHE_DIR}
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.export CCACHE_DIR
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.endif
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ccache-print-options: .PHONY
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@${CCACHE_BIN} -p
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.endif # exists(${CCACHE_BIN})
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.endif # ${MK_CCACHE_BUILD} == "yes"
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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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