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