mirror of
https://github.com/freebsd/freebsd-src
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297 lines
12 KiB
Makefile
297 lines
12 KiB
Makefile
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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 overridden 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_FREEBSD_VERSION is the compiler's __FreeBSD_cc_version value.
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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++17: supports full (or nearly full) C++17 programming environment.
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# - c++14: supports full (or nearly full) C++14 programming environment.
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# - c++11: supports full (or nearly full) C++11 programming environment.
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# - retpoline: supports the retpoline speculative execution vulnerability
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# mitigation.
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# - init-all: supports stack variable initialization.
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# - aarch64-sha512: supports the AArch64 sha512 intrinsic functions.
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#
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# When bootstrapping on macOS, 'apple-clang' will be set in COMPILER_FEATURES
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# to differentiate Apple's version of Clang. Apple Clang uses a different
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# versioning scheme and may not support the same -W/-Wno warning flags. For a
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# mapping of Apple Clang versions to upstream clang versions see
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# https://en.wikipedia.org/wiki/Xcode#Xcode_7.0_-_12.x_(since_Free_On-Device_Development)
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#
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# These variables with an X_ prefix will also be provided if XCC is set.
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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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.if defined(_NO_INCLUDE_COMPILERMK)
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# If _NO_INCLUDE_COMPILERMK is set we are doing a make obj/cleandir/cleanobj
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# and might not have a valid compiler in $PATH yet. In this case just set the
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# variables that are expected by the other .mk files and return
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COMPILER_TYPE=none
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X_COMPILER_TYPE=none
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COMPILER_VERSION=0
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X_COMPILER_VERSION=0
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COMPILER_FEATURES=none
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.else
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# command = /usr/local/bin/ccache cc ...
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# wrapper = /usr/local/libexec/ccache/cc ...
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CCACHE_BUILD_TYPE?= command
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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 ${MK_CCACHE_BUILD:Uno} == "yes" && \
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!make(test-system-*) && !make(print-dir) && !make(showconfig) && \
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(${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_PKG_PREFIX?= ${LOCALBASE}
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CCACHE_WRAPPER_PATH?= ${CCACHE_PKG_PREFIX}/libexec/ccache
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CCACHE_BIN?= ${CCACHE_PKG_PREFIX}/bin/ccache
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.if exists(${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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# 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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.if ${CCACHE_BUILD_TYPE} == "command"
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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)?(:$)?,,g}
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# Override various toolchain vars.
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.for var in CC CXX HOST_CC HOST_CXX
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.if defined(${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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.else
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# Need to ensure CCACHE_WRAPPER_PATH is the first in ${PATH}
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PATH:= ${PATH:C,:?${CCACHE_WRAPPER_PATH}(/world)?(:$)?,,g}
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PATH:= ${CCACHE_WRAPPER_PATH}:${PATH}
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CCACHE_WRAPPER_PATH_PFX= ${CCACHE_WRAPPER_PATH}:
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.endif # ${CCACHE_BUILD_TYPE} == "command"
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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 doesn't affect build output so let it slide for meta mode
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# comparisons.
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.MAKE.META.IGNORE_PATHS+= ${CCACHE_BIN}
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ccache-print-options: .PHONY
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@${CCACHE_BIN} -p
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.endif # exists(${CCACHE_BIN})
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.endif # ${MK_CCACHE_BUILD} == "yes"
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_cc_vars=CC $${_empty_var_}
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.if !empty(_WANT_TOOLCHAIN_CROSS_VARS)
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# Only the toplevel makefile needs to compute the X_COMPILER_* variables.
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# Skipping the computation of the unused X_COMPILER_* in the subdirectory
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# makefiles can save a noticeable amount of time when walking the whole source
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# tree (e.g. during make includes, etc.).
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_cc_vars+=XCC X_
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.endif
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.for cc X_ in ${_cc_vars}
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.if ${cc} == "CC" || !empty(XCC)
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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= ${X_}COMPILER_TYPE ${X_}COMPILER_VERSION \
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${X_}COMPILER_FREEBSD_VERSION ${X_}COMPILER_RESOURCE_DIR
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${X_}_cc_hash= ${${cc}}${MACHINE}${PATH}
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${X_}_cc_hash:= ${${X_}_cc_hash:hash}
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# Only import if none of the vars are set differently 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}) && (!defined(${var}__${${X_}_cc_hash}) || ${${var}__${${X_}_cc_hash}} != ${${var}})
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.if defined(${var}__${${X_}_ld_hash})
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.info Cannot import ${X_}COMPILER variables since cached ${var} is different: ${${var}__${${X_}_cc_hash}} != ${${var}}
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.endif
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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}__${${X_}_cc_hash})
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${var}= ${${var}__${${X_}_cc_hash}}
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.endif
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.endfor
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.endif
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.if ${cc} == "CC" || (${cc} == "XCC" && ${XCC} != ${CC})
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.if ${MACHINE} == "common"
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# common is a pseudo machine for architecture independent
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# generated files - thus there is no compiler.
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${X_}COMPILER_TYPE= none
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${X_}COMPILER_VERSION= 0
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${X_}COMPILER_FREEBSD_VERSION= 0
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.elif !defined(${X_}COMPILER_TYPE) || !defined(${X_}COMPILER_VERSION)
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_v!= ${${cc}:N${CCACHE_BIN}} --version || echo 0.0.0
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.if !defined(${X_}COMPILER_TYPE)
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. if ${${cc}:T:M*gcc*}
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${X_}COMPILER_TYPE:= gcc
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. elif ${${cc}:T:M*clang*}
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${X_}COMPILER_TYPE:= clang
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. elif ${_v:Mgcc}
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${X_}COMPILER_TYPE:= gcc
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. elif ${_v:M\(GCC\)} || ${_v:M*GNU}
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${X_}COMPILER_TYPE:= gcc
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. elif ${_v:Mclang} || ${_v:M(clang-*.*.*)}
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${X_}COMPILER_TYPE:= clang
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. else
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# With GCC, cc --version prints "cc $VERSION ($PKGVERSION)", so if a
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# distribution overrides the default GCC PKGVERSION it is not identified.
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# However, its -v output always says "gcc version" in it, so fall back on that.
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_gcc_version!= ${${cc}:N${CCACHE_BIN}} -v 2>&1 | grep "gcc version"
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. if !empty(_gcc_version)
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${X_}COMPILER_TYPE:= gcc
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. else
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.error Unable to determine compiler type for ${cc}=${${cc}}. Consider setting ${X_}COMPILER_TYPE.
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. endif
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.undef _gcc_version
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. endif
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.endif
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.if !defined(${X_}COMPILER_VERSION)
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${X_}COMPILER_VERSION!=echo "${_v:M[1-9]*.[0-9]*}" | awk -F. '{print $$1 * 10000 + $$2 * 100 + $$3;}'
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.endif
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# Detect apple clang when bootstrapping to select appropriate warning flags.
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.if !defined(${X_}COMPILER_FEATURES) && ${_v:[*]:M*Apple clang version*}
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${X_}COMPILER_FEATURES= apple-clang
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.endif
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.undef _v
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.endif
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.if !defined(${X_}COMPILER_FREEBSD_VERSION)
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${X_}COMPILER_FREEBSD_VERSION!= { echo "__FreeBSD_cc_version" | ${${cc}:N${CCACHE_BIN}} -E - 2>/dev/null || echo __FreeBSD_cc_version; } | sed -n '$$p'
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# If we get a literal "__FreeBSD_cc_version" back then the compiler
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# is a non-FreeBSD build that doesn't support it or some other error
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# occurred.
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.if ${${X_}COMPILER_FREEBSD_VERSION} == "__FreeBSD_cc_version"
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${X_}COMPILER_FREEBSD_VERSION= unknown
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.endif
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.endif
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.if !defined(${X_}COMPILER_RESOURCE_DIR)
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${X_}COMPILER_RESOURCE_DIR!= ${${cc}:N${CCACHE_BIN}} -print-resource-dir 2>/dev/null || echo unknown
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.endif
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${X_}COMPILER_FEATURES+= c++11 c++14
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.if ${${X_}COMPILER_TYPE} == "clang" || \
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(${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 70000)
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${X_}COMPILER_FEATURES+= c++17
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.endif
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.if (${${X_}COMPILER_TYPE} == "clang" && ${${X_}COMPILER_VERSION} >= 100000) || \
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(${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 100100)
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${X_}COMPILER_FEATURES+= c++20
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.endif
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.if ${${X_}COMPILER_TYPE} == "clang" || \
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(${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 120000)
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${X_}COMPILER_FEATURES+= init-all
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.endif
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.if ${${X_}COMPILER_TYPE} == "clang"
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${X_}COMPILER_FEATURES+= retpoline
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# PR257638 lld fails with BE compressed debug. Fixed in main but external tool
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# chains will initially not have the fix. For now limit the feature to LE
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# targets.
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# When compiling bootstrap tools on non-FreeBSD, the various MACHINE variables
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# for the host can be missing or not match FreeBSD's naming (e.g. Linux/amd64
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# reports as MACHINE=x86_64 MACHINE_ARCH=x86_64), causing TARGET_ENDIANNESS to
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# be undefined; be conservative and default to off until we turn this on by
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# default everywhere.
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.include <bsd.endian.mk>
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.if (${.MAKE.OS} == "FreeBSD" || defined(TARGET_ENDIANNESS)) && \
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${TARGET_ENDIANNESS} == "1234"
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${X_}COMPILER_FEATURES+= compressed-debug
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.endif
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.endif
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.if ${${X_}COMPILER_TYPE} == "clang" && ${${X_}COMPILER_VERSION} >= 100000 || \
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(${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 80100)
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${X_}COMPILER_FEATURES+= fileprefixmap
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.endif
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.if (${${X_}COMPILER_TYPE} == "clang" && ${${X_}COMPILER_VERSION} >= 130000) || \
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(${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 90000)
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# AArch64 sha512 intrinsics are supported (and have been tested) in
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# clang 13 and gcc 9.
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${X_}COMPILER_FEATURES+= aarch64-sha512
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.endif
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.else
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# Use CC's values
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X_COMPILER_TYPE= ${COMPILER_TYPE}
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X_COMPILER_VERSION= ${COMPILER_VERSION}
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X_COMPILER_FREEBSD_VERSION= ${COMPILER_FREEBSD_VERSION}
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X_COMPILER_FEATURES= ${COMPILER_FEATURES}
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X_COMPILER_RESOURCE_DIR= ${COMPILER_RESOURCE_DIR}
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.endif # ${cc} == "CC" || (${cc} == "XCC" && ${XCC} != ${CC})
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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}__${${X_}_cc_hash}:= ${${var}}
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.export-env ${var}__${${X_}_cc_hash}
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.undef ${var}__${${X_}_cc_hash}
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.endfor
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.endif # ${cc} == "CC" || !empty(XCC)
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.endfor # .for cc in CC XCC
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.if !defined(_NO_INCLUDE_LINKERMK)
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.include <bsd.linker.mk>
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.endif
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.endif # defined(_NO_INCLUDE_COMPILERMK)
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.endif # !target(__<bsd.compiler.mk>__)
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