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_WRAPPER_PATH?= ${LOCALBASE}/libexec/ccache 68CCACHE_BIN?= ${LOCALBASE}/bin/ccache 69.if exists(${CCACHE_BIN}) 70# Export to ensure sub-makes can filter it out for mkdep/linking and 71# to chain down into kernel build which won't include this file. 72.export CCACHE_BIN 73# Expand and export some variables so they may be based on make vars. 74# This allows doing something like the following in the environment: 75# CCACHE_BASEDIR='${SRCTOP:H}' MAKEOBJDIRPREFIX='${SRCTOP:H}/obj' 76.for var in CCACHE_LOGFILE CCACHE_BASEDIR 77.if defined(${var}) 78${var}:= ${${var}} 79.export ${var} 80.endif 81.endfor 82# Handle bootstrapped compiler changes properly by hashing their content 83# rather than checking mtime. For external compilers it should be safe 84# to use the more optimal mtime check. 85# XXX: CCACHE_COMPILERCHECK= string:<compiler_version, compiler_build_rev, compiler_patch_rev, compiler_default_target, compiler_default_sysroot> 86.if ${CC:N${CCACHE_BIN}:[1]:M/*} == "" 87CCACHE_COMPILERCHECK?= content 88.else 89CCACHE_COMPILERCHECK?= mtime 90.endif 91.export CCACHE_COMPILERCHECK 92# Ensure no bogus CCACHE_PATH leaks in which might avoid the in-tree compiler. 93.if !empty(CCACHE_PATH) 94CCACHE_PATH= 95.export CCACHE_PATH 96.endif 97.if ${CCACHE_BUILD_TYPE} == "command" 98# Remove ccache from the PATH to prevent double calls and wasted CPP/LD time. 99PATH:= ${PATH:C,:?${CCACHE_WRAPPER_PATH}(/world)?(:$)?,,g} 100# Override various toolchain vars. 101.for var in CC CXX HOST_CC HOST_CXX 102.if defined(${var}) && ${${var}:M${CCACHE_BIN}} == "" 103${var}:= ${CCACHE_BIN} ${${var}} 104.endif 105.endfor 106.else 107# Need to ensure CCACHE_WRAPPER_PATH is the first in ${PATH} 108PATH:= ${PATH:C,:?${CCACHE_WRAPPER_PATH}(/world)?(:$)?,,g} 109PATH:= ${CCACHE_WRAPPER_PATH}:${PATH} 110CCACHE_WRAPPER_PATH_PFX= ${CCACHE_WRAPPER_PATH}: 111.endif # ${CCACHE_BUILD_TYPE} == "command" 112# GCC does not need the CCACHE_CPP2 hack enabled by default in devel/ccache. 113# The port enables it due to ccache passing preprocessed C to clang 114# which fails with -Wparentheses-equality, -Wtautological-compare, and 115# -Wself-assign on macro-expanded lines. 116.if defined(COMPILER_TYPE) && ${COMPILER_TYPE} == "gcc" 117CCACHE_NOCPP2= 1 118.export CCACHE_NOCPP2 119.endif 120# Canonicalize CCACHE_DIR for meta mode usage. 121.if !defined(CCACHE_DIR) 122CCACHE_DIR!= ${CCACHE_BIN} -p | awk '$$2 == "cache_dir" {print $$4}' 123.export CCACHE_DIR 124.endif 125.if !empty(CCACHE_DIR) && empty(.MAKE.META.IGNORE_PATHS:M${CCACHE_DIR}) 126CCACHE_DIR:= ${CCACHE_DIR:tA} 127.MAKE.META.IGNORE_PATHS+= ${CCACHE_DIR} 128.export CCACHE_DIR 129.endif 130# ccache doesn't affect build output so let it slide for meta mode 131# comparisons. 132.MAKE.META.IGNORE_PATHS+= ${CCACHE_BIN} 133ccache-print-options: .PHONY 134 @${CCACHE_BIN} -p 135.endif # exists(${CCACHE_BIN}) 136.endif # ${MK_CCACHE_BUILD} == "yes" 137 138_cc_vars=CC $${_empty_var_} 139.if !empty(_WANT_TOOLCHAIN_CROSS_VARS) 140# Only the toplevel makefile needs to compute the X_COMPILER_* variables. 141# Skipping the computation of the unused X_COMPILER_* in the subdirectory 142# makefiles can save a noticeable amount of time when walking the whole source 143# tree (e.g. during make includes, etc.). 144_cc_vars+=XCC X_ 145.endif 146 147.for cc X_ in ${_cc_vars} 148.if ${cc} == "CC" || !empty(XCC) 149# Try to import COMPILER_TYPE and COMPILER_VERSION from parent make. 150# The value is only used/exported for the same environment that impacts 151# CC and COMPILER_* settings here. 152_exported_vars= ${X_}COMPILER_TYPE ${X_}COMPILER_VERSION \ 153 ${X_}COMPILER_FREEBSD_VERSION ${X_}COMPILER_RESOURCE_DIR 154${X_}_cc_hash= ${${cc}}${MACHINE}${PATH} 155${X_}_cc_hash:= ${${X_}_cc_hash:hash} 156# Only import if none of the vars are set differently somehow else. 157_can_export= yes 158.for var in ${_exported_vars} 159.if defined(${var}) && (!defined(${var}__${${X_}_cc_hash}) || ${${var}__${${X_}_cc_hash}} != ${${var}}) 160.if defined(${var}__${${X_}_ld_hash}) 161.info "Cannot import ${X_}COMPILER variables since cached ${var} is different: ${${var}__${${X_}_cc_hash}} != ${${var}}" 162.endif 163_can_export= no 164.endif 165.endfor 166.if ${_can_export} == yes 167.for var in ${_exported_vars} 168.if defined(${var}__${${X_}_cc_hash}) 169${var}= ${${var}__${${X_}_cc_hash}} 170.endif 171.endfor 172.endif 173 174.if ${cc} == "CC" || (${cc} == "XCC" && ${XCC} != ${CC}) 175.if ${MACHINE} == "common" 176# common is a pseudo machine for architecture independent 177# generated files - thus there is no compiler. 178${X_}COMPILER_TYPE= none 179${X_}COMPILER_VERSION= 0 180${X_}COMPILER_FREEBSD_VERSION= 0 181.elif !defined(${X_}COMPILER_TYPE) || !defined(${X_}COMPILER_VERSION) 182_v!= ${${cc}:N${CCACHE_BIN}} --version || echo 0.0.0 183 184.if !defined(${X_}COMPILER_TYPE) 185. if ${${cc}:T:M*gcc*} 186${X_}COMPILER_TYPE:= gcc 187. elif ${${cc}:T:M*clang*} 188${X_}COMPILER_TYPE:= clang 189. elif ${_v:Mgcc} 190${X_}COMPILER_TYPE:= gcc 191. elif ${_v:M\(GCC\)} || ${_v:M*GNU} 192${X_}COMPILER_TYPE:= gcc 193. elif ${_v:Mclang} || ${_v:M(clang-*.*.*)} 194${X_}COMPILER_TYPE:= clang 195. else 196# With GCC, cc --version prints "cc $VERSION ($PKGVERSION)", so if a 197# distribution overrides the default GCC PKGVERSION it is not identified. 198# However, its -v output always says "gcc version" in it, so fall back on that. 199_gcc_version!= ${${cc}:N${CCACHE_BIN}} -v 2>&1 | grep "gcc version" 200. if !empty(_gcc_version) 201${X_}COMPILER_TYPE:= gcc 202. else 203.error Unable to determine compiler type for ${cc}=${${cc}}. Consider setting ${X_}COMPILER_TYPE. 204. endif 205.undef _gcc_version 206. endif 207.endif 208.if !defined(${X_}COMPILER_VERSION) 209${X_}COMPILER_VERSION!=echo "${_v:M[1-9]*.[0-9]*}" | awk -F. '{print $$1 * 10000 + $$2 * 100 + $$3;}' 210.endif 211# Detect apple clang when bootstrapping to select appropriate warning flags. 212.if !defined(${X_}COMPILER_FEATURES) && ${_v:[*]:M*Apple clang version*} 213${X_}COMPILER_FEATURES= apple-clang 214.endif 215.undef _v 216.endif 217.if !defined(${X_}COMPILER_FREEBSD_VERSION) 218${X_}COMPILER_FREEBSD_VERSION!= { echo "__FreeBSD_cc_version" | ${${cc}:N${CCACHE_BIN}} -E - 2>/dev/null || echo __FreeBSD_cc_version; } | sed -n '$$p' 219# If we get a literal "__FreeBSD_cc_version" back then the compiler 220# is a non-FreeBSD build that doesn't support it or some other error 221# occurred. 222.if ${${X_}COMPILER_FREEBSD_VERSION} == "__FreeBSD_cc_version" 223${X_}COMPILER_FREEBSD_VERSION= unknown 224.endif 225.endif 226 227.if !defined(${X_}COMPILER_RESOURCE_DIR) 228${X_}COMPILER_RESOURCE_DIR!= ${${cc}:N${CCACHE_BIN}} -print-resource-dir 2>/dev/null || echo unknown 229.endif 230 231${X_}COMPILER_FEATURES+= c++11 c++14 232.if ${${X_}COMPILER_TYPE} == "clang" || \ 233 (${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 70000) 234${X_}COMPILER_FEATURES+= c++17 235.endif 236.if ${${X_}COMPILER_TYPE} == "clang" 237${X_}COMPILER_FEATURES+= retpoline init-all 238.endif 239 240.else 241# Use CC's values 242X_COMPILER_TYPE= ${COMPILER_TYPE} 243X_COMPILER_VERSION= ${COMPILER_VERSION} 244X_COMPILER_FREEBSD_VERSION= ${COMPILER_FREEBSD_VERSION} 245X_COMPILER_FEATURES= ${COMPILER_FEATURES} 246X_COMPILER_RESOURCE_DIR= ${COMPILER_RESOURCE_DIR} 247.endif # ${cc} == "CC" || (${cc} == "XCC" && ${XCC} != ${CC}) 248 249# Export the values so sub-makes don't have to look them up again, using the 250# hash key computed above. 251.for var in ${_exported_vars} 252${var}__${${X_}_cc_hash}:= ${${var}} 253.export-env ${var}__${${X_}_cc_hash} 254.undef ${var}__${${X_}_cc_hash} 255.endfor 256 257.endif # ${cc} == "CC" || !empty(XCC) 258.endfor # .for cc in CC XCC 259 260.if !defined(_NO_INCLUDE_LINKERMK) 261.include <bsd.linker.mk> 262.endif 263.endif # defined(_NO_INCLUDE_COMPILERMK) 264.endif # !target(__<bsd.compiler.mk>__) 265