1# $FreeBSD$ 2 3# Setup variables for the compiler 4# 5# COMPILER_TYPE is the major type of compiler. Currently gcc and clang support 6# automatic detection. Other compiler types can be shoe-horned in, but require 7# explicit setting of the compiler type. The compiler type can also be set 8# explicitly if, say, you install gcc as clang... 9# 10# COMPILER_VERSION is a numeric constant equal to: 11# major * 10000 + minor * 100 + tiny 12# It too can be overridden on the command line. When testing it, be sure to 13# make sure that you are limiting the test to a specific compiler. Testing 14# against 30300 for gcc likely isn't what you wanted (since versions of gcc 15# prior to 4.2 likely have no prayer of working). 16# 17# COMPILER_FREEBSD_VERSION is the compiler's __FreeBSD_cc_version value. 18# 19# COMPILER_FEATURES will contain one or more of the following, based on 20# compiler support for that feature: 21# 22# - c++17: supports full (or nearly full) C++17 programming environment. 23# - c++14: supports full (or nearly full) C++14 programming environment. 24# - c++11: supports full (or nearly full) C++11 programming environment. 25# - retpoline: supports the retpoline speculative execution vulnerability 26# mitigation. 27# - init-all: supports stack variable initialization. 28# 29# When bootstrapping on macOS, 'apple-clang' will be set in COMPILER_FEATURES 30# to differentiate Apple's version of Clang. Apple Clang uses a different 31# versioning scheme and may not support the same -W/-Wno warning flags. For a 32# mapping of Apple Clang versions to upstream clang versions see 33# https://en.wikipedia.org/wiki/Xcode#Xcode_7.0_-_12.x_(since_Free_On-Device_Development) 34# 35# These variables with an X_ prefix will also be provided if XCC is set. 36# 37# This file may be included multiple times, but only has effect the first time. 38# 39 40.if !target(__<bsd.compiler.mk>__) 41__<bsd.compiler.mk>__: 42 43.include <bsd.opts.mk> 44 45.if defined(_NO_INCLUDE_COMPILERMK) 46# If _NO_INCLUDE_COMPILERMK is set we are doing a make obj/cleandir/cleanobj 47# and might not have a valid compiler in $PATH yet. In this case just set the 48# variables that are expected by the other .mk files and return 49COMPILER_TYPE=none 50X_COMPILER_TYPE=none 51COMPILER_VERSION=0 52X_COMPILER_VERSION=0 53COMPILER_FEATURES=none 54.else 55# command = /usr/local/bin/ccache cc ... 56# wrapper = /usr/local/libexec/ccache/cc ... 57CCACHE_BUILD_TYPE?= command 58# Handle ccache after CC is determined, but not if CC/CXX are already 59# overridden with a manual setup. 60.if ${MK_CCACHE_BUILD:Uno} == "yes" && \ 61 !make(test-system-*) && !make(print-dir) && !make(showconfig) && \ 62 (${CC:M*ccache/world/*} == "" || ${CXX:M*ccache/world/*} == "") 63# CC is always prepended with the ccache wrapper rather than modifying 64# PATH since it is more clear that ccache is used and avoids wasting time 65# for mkdep/linking/asm builds. 66LOCALBASE?= /usr/local 67CCACHE_PKG_PREFIX?= ${LOCALBASE} 68CCACHE_WRAPPER_PATH?= ${CCACHE_PKG_PREFIX}/libexec/ccache 69CCACHE_BIN?= ${CCACHE_PKG_PREFIX}/bin/ccache 70.if exists(${CCACHE_BIN}) 71# Export to ensure sub-makes can filter it out for mkdep/linking and 72# to chain down into kernel build which won't include this file. 73.export CCACHE_BIN 74# Expand and export some variables so they may be based on make vars. 75# This allows doing something like the following in the environment: 76# CCACHE_BASEDIR='${SRCTOP:H}' MAKEOBJDIRPREFIX='${SRCTOP:H}/obj' 77.for var in CCACHE_LOGFILE CCACHE_BASEDIR 78.if defined(${var}) 79${var}:= ${${var}} 80.export ${var} 81.endif 82.endfor 83# Handle bootstrapped compiler changes properly by hashing their content 84# rather than checking mtime. For external compilers it should be safe 85# to use the more optimal mtime check. 86# XXX: CCACHE_COMPILERCHECK= string:<compiler_version, compiler_build_rev, compiler_patch_rev, compiler_default_target, compiler_default_sysroot> 87.if ${CC:N${CCACHE_BIN}:[1]:M/*} == "" 88CCACHE_COMPILERCHECK?= content 89.else 90CCACHE_COMPILERCHECK?= mtime 91.endif 92.export CCACHE_COMPILERCHECK 93# Ensure no bogus CCACHE_PATH leaks in which might avoid the in-tree compiler. 94.if !empty(CCACHE_PATH) 95CCACHE_PATH= 96.export CCACHE_PATH 97.endif 98.if ${CCACHE_BUILD_TYPE} == "command" 99# Remove ccache from the PATH to prevent double calls and wasted CPP/LD time. 100PATH:= ${PATH:C,:?${CCACHE_WRAPPER_PATH}(/world)?(:$)?,,g} 101# Override various toolchain vars. 102.for var in CC CXX HOST_CC HOST_CXX 103.if defined(${var}) && ${${var}:M${CCACHE_BIN}} == "" 104${var}:= ${CCACHE_BIN} ${${var}} 105.endif 106.endfor 107.else 108# Need to ensure CCACHE_WRAPPER_PATH is the first in ${PATH} 109PATH:= ${PATH:C,:?${CCACHE_WRAPPER_PATH}(/world)?(:$)?,,g} 110PATH:= ${CCACHE_WRAPPER_PATH}:${PATH} 111CCACHE_WRAPPER_PATH_PFX= ${CCACHE_WRAPPER_PATH}: 112.endif # ${CCACHE_BUILD_TYPE} == "command" 113# GCC does not need the CCACHE_CPP2 hack enabled by default in devel/ccache. 114# The port enables it due to ccache passing preprocessed C to clang 115# which fails with -Wparentheses-equality, -Wtautological-compare, and 116# -Wself-assign on macro-expanded lines. 117.if defined(COMPILER_TYPE) && ${COMPILER_TYPE} == "gcc" 118CCACHE_NOCPP2= 1 119.export CCACHE_NOCPP2 120.endif 121# Canonicalize CCACHE_DIR for meta mode usage. 122.if !defined(CCACHE_DIR) 123CCACHE_DIR!= ${CCACHE_BIN} -p | awk '$$2 == "cache_dir" {print $$4}' 124.export CCACHE_DIR 125.endif 126.if !empty(CCACHE_DIR) && empty(.MAKE.META.IGNORE_PATHS:M${CCACHE_DIR}) 127CCACHE_DIR:= ${CCACHE_DIR:tA} 128.MAKE.META.IGNORE_PATHS+= ${CCACHE_DIR} 129.export CCACHE_DIR 130.endif 131# ccache doesn't affect build output so let it slide for meta mode 132# comparisons. 133.MAKE.META.IGNORE_PATHS+= ${CCACHE_BIN} 134ccache-print-options: .PHONY 135 @${CCACHE_BIN} -p 136.endif # exists(${CCACHE_BIN}) 137.endif # ${MK_CCACHE_BUILD} == "yes" 138 139_cc_vars=CC $${_empty_var_} 140.if !empty(_WANT_TOOLCHAIN_CROSS_VARS) 141# Only the toplevel makefile needs to compute the X_COMPILER_* variables. 142# Skipping the computation of the unused X_COMPILER_* in the subdirectory 143# makefiles can save a noticeable amount of time when walking the whole source 144# tree (e.g. during make includes, etc.). 145_cc_vars+=XCC X_ 146.endif 147 148.for cc X_ in ${_cc_vars} 149.if ${cc} == "CC" || !empty(XCC) 150# Try to import COMPILER_TYPE and COMPILER_VERSION from parent make. 151# The value is only used/exported for the same environment that impacts 152# CC and COMPILER_* settings here. 153_exported_vars= ${X_}COMPILER_TYPE ${X_}COMPILER_VERSION \ 154 ${X_}COMPILER_FREEBSD_VERSION ${X_}COMPILER_RESOURCE_DIR 155${X_}_cc_hash= ${${cc}}${MACHINE}${PATH} 156${X_}_cc_hash:= ${${X_}_cc_hash:hash} 157# Only import if none of the vars are set differently somehow else. 158_can_export= yes 159.for var in ${_exported_vars} 160.if defined(${var}) && (!defined(${var}__${${X_}_cc_hash}) || ${${var}__${${X_}_cc_hash}} != ${${var}}) 161.if defined(${var}__${${X_}_ld_hash}) 162.info "Cannot import ${X_}COMPILER variables since cached ${var} is different: ${${var}__${${X_}_cc_hash}} != ${${var}}" 163.endif 164_can_export= no 165.endif 166.endfor 167.if ${_can_export} == yes 168.for var in ${_exported_vars} 169.if defined(${var}__${${X_}_cc_hash}) 170${var}= ${${var}__${${X_}_cc_hash}} 171.endif 172.endfor 173.endif 174 175.if ${cc} == "CC" || (${cc} == "XCC" && ${XCC} != ${CC}) 176.if ${MACHINE} == "common" 177# common is a pseudo machine for architecture independent 178# generated files - thus there is no compiler. 179${X_}COMPILER_TYPE= none 180${X_}COMPILER_VERSION= 0 181${X_}COMPILER_FREEBSD_VERSION= 0 182.elif !defined(${X_}COMPILER_TYPE) || !defined(${X_}COMPILER_VERSION) 183_v!= ${${cc}:N${CCACHE_BIN}} --version || echo 0.0.0 184 185.if !defined(${X_}COMPILER_TYPE) 186. if ${${cc}:T:M*gcc*} 187${X_}COMPILER_TYPE:= gcc 188. elif ${${cc}:T:M*clang*} 189${X_}COMPILER_TYPE:= clang 190. elif ${_v:Mgcc} 191${X_}COMPILER_TYPE:= gcc 192. elif ${_v:M\(GCC\)} || ${_v:M*GNU} 193${X_}COMPILER_TYPE:= gcc 194. elif ${_v:Mclang} || ${_v:M(clang-*.*.*)} 195${X_}COMPILER_TYPE:= clang 196. else 197# With GCC, cc --version prints "cc $VERSION ($PKGVERSION)", so if a 198# distribution overrides the default GCC PKGVERSION it is not identified. 199# However, its -v output always says "gcc version" in it, so fall back on that. 200_gcc_version!= ${${cc}:N${CCACHE_BIN}} -v 2>&1 | grep "gcc version" 201. if !empty(_gcc_version) 202${X_}COMPILER_TYPE:= gcc 203. else 204.error Unable to determine compiler type for ${cc}=${${cc}}. Consider setting ${X_}COMPILER_TYPE. 205. endif 206.undef _gcc_version 207. endif 208.endif 209.if !defined(${X_}COMPILER_VERSION) 210${X_}COMPILER_VERSION!=echo "${_v:M[1-9]*.[0-9]*}" | awk -F. '{print $$1 * 10000 + $$2 * 100 + $$3;}' 211.endif 212# Detect apple clang when bootstrapping to select appropriate warning flags. 213.if !defined(${X_}COMPILER_FEATURES) && ${_v:[*]:M*Apple clang version*} 214${X_}COMPILER_FEATURES= apple-clang 215.endif 216.undef _v 217.endif 218.if !defined(${X_}COMPILER_FREEBSD_VERSION) 219${X_}COMPILER_FREEBSD_VERSION!= { echo "__FreeBSD_cc_version" | ${${cc}:N${CCACHE_BIN}} -E - 2>/dev/null || echo __FreeBSD_cc_version; } | sed -n '$$p' 220# If we get a literal "__FreeBSD_cc_version" back then the compiler 221# is a non-FreeBSD build that doesn't support it or some other error 222# occurred. 223.if ${${X_}COMPILER_FREEBSD_VERSION} == "__FreeBSD_cc_version" 224${X_}COMPILER_FREEBSD_VERSION= unknown 225.endif 226.endif 227 228.if !defined(${X_}COMPILER_RESOURCE_DIR) 229${X_}COMPILER_RESOURCE_DIR!= ${${cc}:N${CCACHE_BIN}} -print-resource-dir 2>/dev/null || echo unknown 230.endif 231 232${X_}COMPILER_FEATURES+= c++11 c++14 233.if ${${X_}COMPILER_TYPE} == "clang" || \ 234 (${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 70000) 235${X_}COMPILER_FEATURES+= c++17 236.endif 237.if ${${X_}COMPILER_TYPE} == "clang" 238${X_}COMPILER_FEATURES+= retpoline init-all 239.endif 240.if ${${X_}COMPILER_TYPE} == "clang" && ${${X_}COMPILER_VERSION} >= 100000 || \ 241 (${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 80100) 242${X_}COMPILER_FEATURES+= fileprefixmap 243.endif 244 245.else 246# Use CC's values 247X_COMPILER_TYPE= ${COMPILER_TYPE} 248X_COMPILER_VERSION= ${COMPILER_VERSION} 249X_COMPILER_FREEBSD_VERSION= ${COMPILER_FREEBSD_VERSION} 250X_COMPILER_FEATURES= ${COMPILER_FEATURES} 251X_COMPILER_RESOURCE_DIR= ${COMPILER_RESOURCE_DIR} 252.endif # ${cc} == "CC" || (${cc} == "XCC" && ${XCC} != ${CC}) 253 254# Export the values so sub-makes don't have to look them up again, using the 255# hash key computed above. 256.for var in ${_exported_vars} 257${var}__${${X_}_cc_hash}:= ${${var}} 258.export-env ${var}__${${X_}_cc_hash} 259.undef ${var}__${${X_}_cc_hash} 260.endfor 261 262.endif # ${cc} == "CC" || !empty(XCC) 263.endfor # .for cc in CC XCC 264 265.if !defined(_NO_INCLUDE_LINKERMK) 266.include <bsd.linker.mk> 267.endif 268.endif # defined(_NO_INCLUDE_COMPILERMK) 269.endif # !target(__<bsd.compiler.mk>__) 270