1 2# Setup variables for the compiler 3# 4# COMPILER_TYPE is the major type of compiler. Currently gcc and clang support 5# automatic detection. Other compiler types can be shoe-horned in, but require 6# explicit setting of the compiler type. The compiler type can also be set 7# explicitly if, say, you install gcc as clang... 8# 9# COMPILER_VERSION is a numeric constant equal to: 10# major * 10000 + minor * 100 + tiny 11# It too can be overridden on the command line. When testing it, be sure to 12# make sure that you are limiting the test to a specific compiler. Testing 13# against 30300 for gcc likely isn't what you wanted (since versions of gcc 14# prior to 4.2 likely have no prayer of working). 15# 16# COMPILER_FREEBSD_VERSION is the compiler's __FreeBSD_cc_version value. 17# 18# COMPILER_FEATURES will contain one or more of the following, based on 19# compiler support for that feature: 20# 21# - c++17: supports full (or nearly full) C++17 programming environment. 22# - c++14: supports full (or nearly full) C++14 programming environment. 23# - c++11: supports full (or nearly full) C++11 programming environment. 24# - retpoline: supports the retpoline speculative execution vulnerability 25# mitigation. 26# - init-all: supports stack variable initialization. 27# - stackclash:supports stack clash protection 28# - zeroregs: supports zeroing used registers on return 29# - aarch64-sha512: supports the AArch64 sha512 intrinsic functions. 30# 31# When bootstrapping on macOS, 'apple-clang' will be set in COMPILER_FEATURES 32# to differentiate Apple's version of Clang. Apple Clang uses a different 33# versioning scheme and may not support the same -W/-Wno warning flags. For a 34# mapping of Apple Clang versions to upstream clang versions see 35# https://en.wikipedia.org/wiki/Xcode#Xcode_7.0_-_12.x_(since_Free_On-Device_Development) 36# 37# These variables with an X_ prefix will also be provided if XCC is set. 38# 39# This file may be included multiple times, but only has effect the first time. 40# 41 42.if !target(__<bsd.compiler.mk>__) 43__<bsd.compiler.mk>__: .NOTMAIN 44 45.include <bsd.opts.mk> 46 47.if defined(_NO_INCLUDE_COMPILERMK) 48# If _NO_INCLUDE_COMPILERMK is set we are doing a make obj/cleandir/cleanobj 49# and might not have a valid compiler in $PATH yet. In this case just set the 50# variables that are expected by the other .mk files and return 51COMPILER_TYPE=none 52X_COMPILER_TYPE=none 53COMPILER_VERSION=0 54X_COMPILER_VERSION=0 55COMPILER_FEATURES=none 56.else 57# command = /usr/local/bin/ccache cc ... 58# wrapper = /usr/local/libexec/ccache/cc ... 59CCACHE_BUILD_TYPE?= command 60# Handle ccache after CC is determined, but not if CC/CXX are already 61# overridden with a manual setup. 62.if ${MK_CCACHE_BUILD:Uno} == "yes" && \ 63 !make(test-system-*) && !make(print-dir) && !make(showconfig) && \ 64 (${CC:M*ccache/world/*} == "" || ${CXX:M*ccache/world/*} == "") 65# CC is always prepended with the ccache wrapper rather than modifying 66# PATH since it is more clear that ccache is used and avoids wasting time 67# for mkdep/linking/asm builds. 68LOCALBASE?= /usr/local 69CCACHE_PKG_PREFIX?= ${LOCALBASE} 70CCACHE_WRAPPER_PATH?= ${CCACHE_PKG_PREFIX}/libexec/ccache 71CCACHE_BIN?= ${CCACHE_PKG_PREFIX}/bin/ccache 72.if exists(${CCACHE_BIN}) 73# Export to ensure sub-makes can filter it out for mkdep/linking and 74# to chain down into kernel build which won't include this file. 75.export CCACHE_BIN 76# Expand and export some variables so they may be based on make vars. 77# This allows doing something like the following in the environment: 78# CCACHE_BASEDIR='${SRCTOP:H}' MAKEOBJDIRPREFIX='${SRCTOP:H}/obj' 79.for var in CCACHE_LOGFILE CCACHE_BASEDIR 80.if defined(${var}) 81${var}:= ${${var}} 82.export ${var} 83.endif 84.endfor 85# Handle bootstrapped compiler changes properly by hashing their content 86# rather than checking mtime. For external compilers it should be safe 87# to use the more optimal mtime check. 88# XXX: CCACHE_COMPILERCHECK= string:<compiler_version, compiler_build_rev, compiler_patch_rev, compiler_default_target, compiler_default_sysroot> 89.if ${CC:N${CCACHE_BIN}:[1]:M/*} == "" 90CCACHE_COMPILERCHECK?= content 91.else 92CCACHE_COMPILERCHECK?= mtime 93.endif 94.export CCACHE_COMPILERCHECK 95# Ensure no bogus CCACHE_PATH leaks in which might avoid the in-tree compiler. 96.if !empty(CCACHE_PATH) 97CCACHE_PATH= 98.export CCACHE_PATH 99.endif 100.if ${CCACHE_BUILD_TYPE} == "command" 101# Remove ccache from the PATH to prevent double calls and wasted CPP/LD time. 102PATH:= ${PATH:C,:?${CCACHE_WRAPPER_PATH}(/world)?(:$)?,,g} 103# Override various toolchain vars. 104.for var in CC CXX HOST_CC HOST_CXX 105.if defined(${var}) && ${${var}:M${CCACHE_BIN}} == "" 106${var}:= ${CCACHE_BIN} ${${var}} 107.endif 108.endfor 109.else 110# Need to ensure CCACHE_WRAPPER_PATH is the first in ${PATH} 111PATH:= ${PATH:C,:?${CCACHE_WRAPPER_PATH}(/world)?(:$)?,,g} 112PATH:= ${CCACHE_WRAPPER_PATH}:${PATH} 113CCACHE_WRAPPER_PATH_PFX= ${CCACHE_WRAPPER_PATH}: 114.endif # ${CCACHE_BUILD_TYPE} == "command" 115# GCC does not need the CCACHE_CPP2 hack enabled by default in devel/ccache. 116# The port enables it due to ccache passing preprocessed C to clang 117# which fails with -Wparentheses-equality, -Wtautological-compare, and 118# -Wself-assign on macro-expanded lines. 119.if defined(COMPILER_TYPE) && ${COMPILER_TYPE} == "gcc" 120CCACHE_NOCPP2= 1 121.export CCACHE_NOCPP2 122.endif 123# Canonicalize CCACHE_DIR for meta mode usage. 124.if !defined(CCACHE_DIR) 125CCACHE_DIR!= ${CCACHE_BIN} -p | awk '$$2 == "cache_dir" {print $$4}' 126.export CCACHE_DIR 127.endif 128.if !empty(CCACHE_DIR) && empty(.MAKE.META.IGNORE_PATHS:M${CCACHE_DIR}) 129CCACHE_DIR:= ${CCACHE_DIR:tA} 130.MAKE.META.IGNORE_PATHS+= ${CCACHE_DIR} 131.export CCACHE_DIR 132.endif 133# ccache doesn't affect build output so let it slide for meta mode 134# comparisons. 135.MAKE.META.IGNORE_PATHS+= ${CCACHE_BIN} 136ccache-print-options: .PHONY 137 @${CCACHE_BIN} -p 138.endif # exists(${CCACHE_BIN}) 139.endif # ${MK_CCACHE_BUILD} == "yes" 140 141_cc_vars=CC $${_empty_var_} 142.if !empty(_WANT_TOOLCHAIN_CROSS_VARS) 143# Only the toplevel makefile needs to compute the X_COMPILER_* variables. 144# Skipping the computation of the unused X_COMPILER_* in the subdirectory 145# makefiles can save a noticeable amount of time when walking the whole source 146# tree (e.g. during make includes, etc.). 147_cc_vars+=XCC X_ 148.endif 149 150.for cc X_ in ${_cc_vars} 151.if ${cc} == "CC" || !empty(XCC) 152# Try to import COMPILER_TYPE and COMPILER_VERSION from parent make. 153# The value is only used/exported for the same environment that impacts 154# CC and COMPILER_* settings here. 155_exported_vars= ${X_}COMPILER_TYPE ${X_}COMPILER_VERSION \ 156 ${X_}COMPILER_FREEBSD_VERSION ${X_}COMPILER_RESOURCE_DIR 157${X_}_cc_hash= ${${cc}}${MACHINE}${PATH} 158${X_}_cc_hash:= ${${X_}_cc_hash:hash} 159# Only import if none of the vars are set differently somehow else. 160_can_export= yes 161.for var in ${_exported_vars} 162.if defined(${var}) && (!defined(${var}__${${X_}_cc_hash}) || ${${var}__${${X_}_cc_hash}} != ${${var}}) 163.if defined(${var}__${${X_}_ld_hash}) 164.info Cannot import ${X_}COMPILER variables since cached ${var} is different: ${${var}__${${X_}_cc_hash}} != ${${var}} 165.endif 166_can_export= no 167.endif 168.endfor 169.if ${_can_export} == yes 170.for var in ${_exported_vars} 171.if defined(${var}__${${X_}_cc_hash}) 172${var}= ${${var}__${${X_}_cc_hash}} 173.endif 174.endfor 175.endif 176 177.if ${cc} == "CC" || (${cc} == "XCC" && ${XCC} != ${CC}) 178.if ${MACHINE} == "common" 179# common is a pseudo machine for architecture independent 180# generated files - thus there is no compiler. 181${X_}COMPILER_TYPE= none 182${X_}COMPILER_VERSION= 0 183${X_}COMPILER_FREEBSD_VERSION= 0 184.elif !defined(${X_}COMPILER_TYPE) || !defined(${X_}COMPILER_VERSION) 185_v!= ${${cc}:N${CCACHE_BIN}} --version || echo 0.0.0 186 187.if !defined(${X_}COMPILER_TYPE) 188. if ${${cc}:T:M*gcc*} 189${X_}COMPILER_TYPE:= gcc 190. elif ${${cc}:T:M*clang*} 191${X_}COMPILER_TYPE:= clang 192. elif ${_v:Mgcc} 193${X_}COMPILER_TYPE:= gcc 194. elif ${_v:M\(GCC\)} || ${_v:M*GNU} 195${X_}COMPILER_TYPE:= gcc 196. elif ${_v:Mclang} || ${_v:M(clang-*.*.*)} 197${X_}COMPILER_TYPE:= clang 198. else 199# With GCC, cc --version prints "cc $VERSION ($PKGVERSION)", so if a 200# distribution overrides the default GCC PKGVERSION it is not identified. 201# However, its -v output always says "gcc version" in it, so fall back on that. 202_gcc_version!= ${${cc}:N${CCACHE_BIN}} -v 2>&1 | grep "gcc version" 203. if !empty(_gcc_version) 204${X_}COMPILER_TYPE:= gcc 205. else 206.error Unable to determine compiler type for ${cc}=${${cc}}. Consider setting ${X_}COMPILER_TYPE. 207. endif 208.undef _gcc_version 209. endif 210.endif 211.if !defined(${X_}COMPILER_VERSION) 212${X_}COMPILER_VERSION!=echo "${_v:M[1-9]*.[0-9]*}" | awk -F. '{print $$1 * 10000 + $$2 * 100 + $$3;}' 213.endif 214# Detect apple clang when bootstrapping to select appropriate warning flags. 215.if !defined(${X_}COMPILER_FEATURES) && ${_v:[*]:M*Apple clang version*} 216${X_}COMPILER_FEATURES= apple-clang 217.endif 218.undef _v 219.endif 220.if !defined(${X_}COMPILER_FREEBSD_VERSION) 221${X_}COMPILER_FREEBSD_VERSION!= { echo "__FreeBSD_cc_version" | ${${cc}:N${CCACHE_BIN}} -E - 2>/dev/null || echo __FreeBSD_cc_version; } | sed -n '$$p' 222# If we get a literal "__FreeBSD_cc_version" back then the compiler 223# is a non-FreeBSD build that doesn't support it or some other error 224# occurred. 225.if ${${X_}COMPILER_FREEBSD_VERSION} == "__FreeBSD_cc_version" 226${X_}COMPILER_FREEBSD_VERSION= unknown 227.endif 228.endif 229 230.if !defined(${X_}COMPILER_RESOURCE_DIR) 231${X_}COMPILER_RESOURCE_DIR!= ${${cc}:N${CCACHE_BIN}} -print-resource-dir 2>/dev/null || echo unknown 232.endif 233 234${X_}COMPILER_FEATURES+= c++11 c++14 235.if ${${X_}COMPILER_TYPE} == "clang" || \ 236 (${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 70000) 237${X_}COMPILER_FEATURES+= c++17 238.endif 239.if (${${X_}COMPILER_TYPE} == "clang" && ${${X_}COMPILER_VERSION} >= 100000) || \ 240 (${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 100100) 241${X_}COMPILER_FEATURES+= c++20 242.endif 243.if ${${X_}COMPILER_TYPE} == "clang" || \ 244 (${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 120000) 245${X_}COMPILER_FEATURES+= init-all 246.endif 247.if ${${X_}COMPILER_TYPE} == "clang" 248${X_}COMPILER_FEATURES+= blocks 249${X_}COMPILER_FEATURES+= retpoline 250# PR257638 lld fails with BE compressed debug. Fixed in main but external tool 251# chains will initially not have the fix. For now limit the feature to LE 252# targets. 253# When compiling bootstrap tools on non-FreeBSD, the various MACHINE variables 254# for the host can be missing or not match FreeBSD's naming (e.g. Linux/amd64 255# reports as MACHINE=x86_64 MACHINE_ARCH=x86_64), causing TARGET_ENDIANNESS to 256# be undefined; be conservative and default to off until we turn this on by 257# default everywhere. 258.include <bsd.endian.mk> 259.if (${.MAKE.OS} == "FreeBSD" || defined(TARGET_ENDIANNESS)) && \ 260 ${TARGET_ENDIANNESS} == "1234" 261${X_}COMPILER_FEATURES+= compressed-debug 262.endif 263.endif 264.if ${${X_}COMPILER_TYPE} == "clang" && ${${X_}COMPILER_VERSION} >= 100000 || \ 265 (${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 80100) 266${X_}COMPILER_FEATURES+= fileprefixmap 267.endif 268 269.if (${${X_}COMPILER_TYPE} == "clang" && ${${X_}COMPILER_VERSION} >= 70000 \ 270 && ${MACHINE_ARCH:Mriscv*} != "" && ${MACHINE_ARCH:Mpower*} != "") || \ 271 (${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 81000 \ 272 && ${MACHINE_ARCH:Mriscv*} != "") 273${X_}COMPILER_FEATURES+= stackclash 274.endif 275 276 277.if (${${X_}COMPILER_TYPE} == "clang" && ${${X_}COMPILER_VERSION} >= 150000) || \ 278 (${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 110000) && \ 279 ${MACHINE_ARCH:Mriscv*} != "" && ${MACHINE_ARCH:Mpower*} != "" && \ 280 ${MACHINE_ARCH:Marmv7*} != "" 281${X_}COMPILER_FEATURES+= zeroregs 282.endif 283 284.if (${${X_}COMPILER_TYPE} == "clang" && ${${X_}COMPILER_VERSION} >= 130000) || \ 285 (${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 90000) 286# AArch64 sha512 intrinsics are supported (and have been tested) in 287# clang 13 and gcc 9. 288${X_}COMPILER_FEATURES+= aarch64-sha512 289.endif 290 291.else 292# Use CC's values 293X_COMPILER_TYPE= ${COMPILER_TYPE} 294X_COMPILER_VERSION= ${COMPILER_VERSION} 295X_COMPILER_FREEBSD_VERSION= ${COMPILER_FREEBSD_VERSION} 296X_COMPILER_FEATURES= ${COMPILER_FEATURES} 297X_COMPILER_RESOURCE_DIR= ${COMPILER_RESOURCE_DIR} 298.endif # ${cc} == "CC" || (${cc} == "XCC" && ${XCC} != ${CC}) 299 300# Export the values so sub-makes don't have to look them up again, using the 301# hash key computed above. 302.for var in ${_exported_vars} 303${var}__${${X_}_cc_hash}:= ${${var}} 304.export-env ${var}__${${X_}_cc_hash} 305.undef ${var}__${${X_}_cc_hash} 306.endfor 307 308.endif # ${cc} == "CC" || !empty(XCC) 309.endfor # .for cc in CC XCC 310 311.if !defined(_NO_INCLUDE_LINKERMK) 312.include <bsd.linker.mk> 313.endif 314.endif # defined(_NO_INCLUDE_COMPILERMK) 315.endif # !target(__<bsd.compiler.mk>__) 316