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# 28# These variables with an X_ prefix will also be provided if XCC is set. 29# 30# This file may be included multiple times, but only has effect the first time. 31# 32 33.if !target(__<bsd.compiler.mk>__) 34__<bsd.compiler.mk>__: 35 36.include <bsd.opts.mk> 37 38.if defined(_NO_INCLUDE_COMPILERMK) 39# If _NO_INCLUDE_COMPILERMK is set we are doing a make obj/cleandir/cleanobj 40# and might not have a valid compiler in $PATH yet. In this case just set the 41# variables that are expected by the other .mk files and return 42COMPILER_TYPE=none 43X_COMPILER_TYPE=none 44COMPILER_VERSION=0 45X_COMPILER_VERSION=0 46COMPILER_FEATURES=none 47.else 48# command = /usr/local/bin/ccache cc ... 49# wrapper = /usr/local/libexec/ccache/cc ... 50CCACHE_BUILD_TYPE?= command 51# Handle ccache after CC is determined, but not if CC/CXX are already 52# overridden with a manual setup. 53.if ${MK_CCACHE_BUILD:Uno} == "yes" && \ 54 !make(test-system-*) && !make(print-dir) && !make(showconfig) && \ 55 (${CC:M*ccache/world/*} == "" || ${CXX:M*ccache/world/*} == "") 56# CC is always prepended with the ccache wrapper rather than modifying 57# PATH since it is more clear that ccache is used and avoids wasting time 58# for mkdep/linking/asm builds. 59LOCALBASE?= /usr/local 60CCACHE_WRAPPER_PATH?= ${LOCALBASE}/libexec/ccache 61CCACHE_BIN?= ${LOCALBASE}/bin/ccache 62.if exists(${CCACHE_BIN}) 63# Export to ensure sub-makes can filter it out for mkdep/linking and 64# to chain down into kernel build which won't include this file. 65.export CCACHE_BIN 66# Expand and export some variables so they may be based on make vars. 67# This allows doing something like the following in the environment: 68# CCACHE_BASEDIR='${SRCTOP:H}' MAKEOBJDIRPREFIX='${SRCTOP:H}/obj' 69.for var in CCACHE_LOGFILE CCACHE_BASEDIR 70.if defined(${var}) 71${var}:= ${${var}} 72.export ${var} 73.endif 74.endfor 75# Handle bootstrapped compiler changes properly by hashing their content 76# rather than checking mtime. For external compilers it should be safe 77# to use the more optimal mtime check. 78# XXX: CCACHE_COMPILERCHECK= string:<compiler_version, compiler_build_rev, compiler_patch_rev, compiler_default_target, compiler_default_sysroot> 79.if ${CC:N${CCACHE_BIN}:[1]:M/*} == "" 80CCACHE_COMPILERCHECK?= content 81.else 82CCACHE_COMPILERCHECK?= mtime 83.endif 84.export CCACHE_COMPILERCHECK 85# Ensure no bogus CCACHE_PATH leaks in which might avoid the in-tree compiler. 86.if !empty(CCACHE_PATH) 87CCACHE_PATH= 88.export CCACHE_PATH 89.endif 90.if ${CCACHE_BUILD_TYPE} == "command" 91# Remove ccache from the PATH to prevent double calls and wasted CPP/LD time. 92PATH:= ${PATH:C,:?${CCACHE_WRAPPER_PATH}(/world)?(:$)?,,g} 93# Override various toolchain vars. 94.for var in CC CXX HOST_CC HOST_CXX 95.if defined(${var}) && ${${var}:M${CCACHE_BIN}} == "" 96${var}:= ${CCACHE_BIN} ${${var}} 97.endif 98.endfor 99.else 100# Need to ensure CCACHE_WRAPPER_PATH is the first in ${PATH} 101PATH:= ${PATH:C,:?${CCACHE_WRAPPER_PATH}(/world)?(:$)?,,g} 102PATH:= ${CCACHE_WRAPPER_PATH}:${PATH} 103CCACHE_WRAPPER_PATH_PFX= ${CCACHE_WRAPPER_PATH}: 104.endif # ${CCACHE_BUILD_TYPE} == "command" 105# GCC does not need the CCACHE_CPP2 hack enabled by default in devel/ccache. 106# The port enables it due to ccache passing preprocessed C to clang 107# which fails with -Wparentheses-equality, -Wtautological-compare, and 108# -Wself-assign on macro-expanded lines. 109.if defined(COMPILER_TYPE) && ${COMPILER_TYPE} == "gcc" 110CCACHE_NOCPP2= 1 111.export CCACHE_NOCPP2 112.endif 113# Canonicalize CCACHE_DIR for meta mode usage. 114.if !defined(CCACHE_DIR) 115CCACHE_DIR!= ${CCACHE_BIN} -p | awk '$$2 == "cache_dir" {print $$4}' 116.export CCACHE_DIR 117.endif 118.if !empty(CCACHE_DIR) && empty(.MAKE.META.IGNORE_PATHS:M${CCACHE_DIR}) 119CCACHE_DIR:= ${CCACHE_DIR:tA} 120.MAKE.META.IGNORE_PATHS+= ${CCACHE_DIR} 121.export CCACHE_DIR 122.endif 123# ccache doesn't affect build output so let it slide for meta mode 124# comparisons. 125.MAKE.META.IGNORE_PATHS+= ${CCACHE_BIN} 126ccache-print-options: .PHONY 127 @${CCACHE_BIN} -p 128.endif # exists(${CCACHE_BIN}) 129.endif # ${MK_CCACHE_BUILD} == "yes" 130 131_cc_vars=CC $${_empty_var_} 132.if !empty(_WANT_TOOLCHAIN_CROSS_VARS) 133# Only the toplevel makefile needs to compute the X_COMPILER_* variables. 134# Skipping the computation of the unused X_COMPILER_* in the subdirectory 135# makefiles can save a noticeable amount of time when walking the whole source 136# tree (e.g. during make includes, etc.). 137_cc_vars+=XCC X_ 138.endif 139 140.for cc X_ in ${_cc_vars} 141.if ${cc} == "CC" || !empty(XCC) 142# Try to import COMPILER_TYPE and COMPILER_VERSION from parent make. 143# The value is only used/exported for the same environment that impacts 144# CC and COMPILER_* settings here. 145_exported_vars= ${X_}COMPILER_TYPE ${X_}COMPILER_VERSION \ 146 ${X_}COMPILER_FREEBSD_VERSION ${X_}COMPILER_RESOURCE_DIR 147${X_}_cc_hash= ${${cc}}${MACHINE}${PATH} 148${X_}_cc_hash:= ${${X_}_cc_hash:hash} 149# Only import if none of the vars are set somehow else. 150_can_export= yes 151.for var in ${_exported_vars} 152.if defined(${var}) 153_can_export= no 154.endif 155.endfor 156.if ${_can_export} == yes 157.for var in ${_exported_vars} 158.if defined(${var}__${${X_}_cc_hash}) 159${var}= ${${var}__${${X_}_cc_hash}} 160.endif 161.endfor 162.endif 163 164.if ${cc} == "CC" || (${cc} == "XCC" && ${XCC} != ${CC}) 165.if ${MACHINE} == "common" 166# common is a pseudo machine for architecture independent 167# generated files - thus there is no compiler. 168${X_}COMPILER_TYPE= none 169${X_}COMPILER_VERSION= 0 170${X_}COMPILER_FREEBSD_VERSION= 0 171.elif !defined(${X_}COMPILER_TYPE) || !defined(${X_}COMPILER_VERSION) 172_v!= ${${cc}:N${CCACHE_BIN}} --version || echo 0.0.0 173 174.if !defined(${X_}COMPILER_TYPE) 175. if ${${cc}:T:M*gcc*} 176${X_}COMPILER_TYPE:= gcc 177. elif ${${cc}:T:M*clang*} 178${X_}COMPILER_TYPE:= clang 179. elif ${_v:Mgcc} 180${X_}COMPILER_TYPE:= gcc 181. elif ${_v:M\(GCC\)} || ${_v:M*GNU} 182${X_}COMPILER_TYPE:= gcc 183. elif ${_v:Mclang} || ${_v:M(clang-*.*.*)} 184${X_}COMPILER_TYPE:= clang 185. else 186.error Unable to determine compiler type for ${cc}=${${cc}}. Consider setting ${X_}COMPILER_TYPE. 187. endif 188.endif 189.if !defined(${X_}COMPILER_VERSION) 190${X_}COMPILER_VERSION!=echo "${_v:M[1-9]*.[0-9]*}" | awk -F. '{print $$1 * 10000 + $$2 * 100 + $$3;}' 191.endif 192.undef _v 193.endif 194.if !defined(${X_}COMPILER_FREEBSD_VERSION) 195${X_}COMPILER_FREEBSD_VERSION!= { echo "__FreeBSD_cc_version" | ${${cc}:N${CCACHE_BIN}} -E - 2>/dev/null || echo __FreeBSD_cc_version; } | sed -n '$$p' 196# If we get a literal "__FreeBSD_cc_version" back then the compiler 197# is a non-FreeBSD build that doesn't support it or some other error 198# occurred. 199.if ${${X_}COMPILER_FREEBSD_VERSION} == "__FreeBSD_cc_version" 200${X_}COMPILER_FREEBSD_VERSION= unknown 201.endif 202.endif 203 204.if !defined(${X_}COMPILER_RESOURCE_DIR) 205${X_}COMPILER_RESOURCE_DIR!= ${${cc}:N${CCACHE_BIN}} -print-resource-dir 2>/dev/null || echo unknown 206.endif 207 208${X_}COMPILER_FEATURES= c++11 c++14 209.if ${${X_}COMPILER_TYPE} == "clang" || \ 210 (${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 70000) 211${X_}COMPILER_FEATURES+= c++17 212.endif 213.if ${${X_}COMPILER_TYPE} == "clang" 214${X_}COMPILER_FEATURES+= retpoline 215.endif 216 217.else 218# Use CC's values 219X_COMPILER_TYPE= ${COMPILER_TYPE} 220X_COMPILER_VERSION= ${COMPILER_VERSION} 221X_COMPILER_FREEBSD_VERSION= ${COMPILER_FREEBSD_VERSION} 222X_COMPILER_FEATURES= ${COMPILER_FEATURES} 223X_COMPILER_RESOURCE_DIR= ${COMPILER_RESOURCE_DIR} 224.endif # ${cc} == "CC" || (${cc} == "XCC" && ${XCC} != ${CC}) 225 226# Export the values so sub-makes don't have to look them up again, using the 227# hash key computed above. 228.for var in ${_exported_vars} 229${var}__${${X_}_cc_hash}:= ${${var}} 230.export-env ${var}__${${X_}_cc_hash} 231.undef ${var}__${${X_}_cc_hash} 232.endfor 233 234.endif # ${cc} == "CC" || !empty(XCC) 235.endfor # .for cc in CC XCC 236 237.if !defined(_NO_INCLUDE_LINKERMK) 238.include <bsd.linker.mk> 239.endif 240.endif # defined(_NO_INCLUDE_COMPILERMK) 241.endif # !target(__<bsd.compiler.mk>__) 242