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++11: supports full (or nearly full) C++11 programming environment. 23# - retpoline: supports the retpoline speculative execution vulnerability 24# mitigation. 25# 26# These variables with an X_ prefix will also be provided if XCC is set. 27# 28# This file may be included multiple times, but only has effect the first time. 29# 30 31.if !target(__<bsd.compiler.mk>__) 32__<bsd.compiler.mk>__: 33 34.include <bsd.opts.mk> 35 36.if defined(_NO_INCLUDE_COMPILERMK) 37# If _NO_INCLUDE_COMPILERMK is set we are doing a make obj/cleandir/cleanobj 38# and might not have a valid compiler in $PATH yet. In this case just set the 39# variables that are expected by the other .mk files and return 40COMPILER_TYPE=none 41X_COMPILER_TYPE=none 42COMPILER_VERSION=0 43X_COMPILER_VERSION=0 44COMPILER_FEATURES=none 45.else 46# command = /usr/local/bin/ccache cc ... 47# wrapper = /usr/local/libexec/ccache/cc ... 48CCACHE_BUILD_TYPE?= command 49# Handle ccache after CC is determined, but not if CC/CXX are already 50# overridden with a manual setup. 51.if ${MK_CCACHE_BUILD:Uno} == "yes" && \ 52 !make(test-system-*) && !make(print-dir) && !make(showconfig) && \ 53 (${CC:M*ccache/world/*} == "" || ${CXX:M*ccache/world/*} == "") 54# CC is always prepended with the ccache wrapper rather than modifying 55# PATH since it is more clear that ccache is used and avoids wasting time 56# for mkdep/linking/asm builds. 57LOCALBASE?= /usr/local 58CCACHE_WRAPPER_PATH?= ${LOCALBASE}/libexec/ccache 59CCACHE_BIN?= ${LOCALBASE}/bin/ccache 60.if exists(${CCACHE_BIN}) 61# Export to ensure sub-makes can filter it out for mkdep/linking and 62# to chain down into kernel build which won't include this file. 63.export CCACHE_BIN 64# Expand and export some variables so they may be based on make vars. 65# This allows doing something like the following in the environment: 66# CCACHE_BASEDIR='${SRCTOP:H}' MAKEOBJDIRPREFIX='${SRCTOP:H}/obj' 67.for var in CCACHE_LOGFILE CCACHE_BASEDIR 68.if defined(${var}) 69${var}:= ${${var}} 70.export ${var} 71.endif 72.endfor 73# Handle bootstrapped compiler changes properly by hashing their content 74# rather than checking mtime. For external compilers it should be safe 75# to use the more optimal mtime check. 76# XXX: CCACHE_COMPILERCHECK= string:<compiler_version, compiler_build_rev, compiler_patch_rev, compiler_default_target, compiler_default_sysroot> 77.if ${CC:N${CCACHE_BIN}:[1]:M/*} == "" 78CCACHE_COMPILERCHECK?= content 79.else 80CCACHE_COMPILERCHECK?= mtime 81.endif 82.export CCACHE_COMPILERCHECK 83# Ensure no bogus CCACHE_PATH leaks in which might avoid the in-tree compiler. 84.if !empty(CCACHE_PATH) 85CCACHE_PATH= 86.export CCACHE_PATH 87.endif 88.if ${CCACHE_BUILD_TYPE} == "command" 89# Remove ccache from the PATH to prevent double calls and wasted CPP/LD time. 90PATH:= ${PATH:C,:?${CCACHE_WRAPPER_PATH}(/world)?(:$)?,,g} 91# Override various toolchain vars. 92.for var in CC CXX HOST_CC HOST_CXX 93.if defined(${var}) && ${${var}:M${CCACHE_BIN}} == "" 94${var}:= ${CCACHE_BIN} ${${var}} 95.endif 96.endfor 97.else 98# Need to ensure CCACHE_WRAPPER_PATH is the first in ${PATH} 99PATH:= ${PATH:C,:?${CCACHE_WRAPPER_PATH}(/world)?(:$)?,,g} 100PATH:= ${CCACHE_WRAPPER_PATH}:${PATH} 101CCACHE_WRAPPER_PATH_PFX= ${CCACHE_WRAPPER_PATH}: 102.endif # ${CCACHE_BUILD_TYPE} == "command" 103# GCC does not need the CCACHE_CPP2 hack enabled by default in devel/ccache. 104# The port enables it due to ccache passing preprocessed C to clang 105# which fails with -Wparentheses-equality, -Wtautological-compare, and 106# -Wself-assign on macro-expanded lines. 107.if defined(COMPILER_TYPE) && ${COMPILER_TYPE} == "gcc" 108CCACHE_NOCPP2= 1 109.export CCACHE_NOCPP2 110.endif 111# Canonicalize CCACHE_DIR for meta mode usage. 112.if !defined(CCACHE_DIR) 113CCACHE_DIR!= ${CCACHE_BIN} -p | awk '$$2 == "cache_dir" {print $$4}' 114.export CCACHE_DIR 115.endif 116.if !empty(CCACHE_DIR) && empty(.MAKE.META.IGNORE_PATHS:M${CCACHE_DIR}) 117CCACHE_DIR:= ${CCACHE_DIR:tA} 118.MAKE.META.IGNORE_PATHS+= ${CCACHE_DIR} 119.export CCACHE_DIR 120.endif 121# ccache doesn't affect build output so let it slide for meta mode 122# comparisons. 123.MAKE.META.IGNORE_PATHS+= ${CCACHE_BIN} 124ccache-print-options: .PHONY 125 @${CCACHE_BIN} -p 126.endif # exists(${CCACHE_BIN}) 127.endif # ${MK_CCACHE_BUILD} == "yes" 128 129_cc_vars=CC $${_empty_var_} 130.if !empty(_WANT_TOOLCHAIN_CROSS_VARS) 131# Only the toplevel makefile needs to compute the X_COMPILER_* variables. 132# Skipping the computation of the unused X_COMPILER_* in the subdirectory 133# makefiles can save a noticeable amount of time when walking the whole source 134# tree (e.g. during make includes, etc.). 135_cc_vars+=XCC X_ 136.endif 137 138.for cc X_ in ${_cc_vars} 139.if ${cc} == "CC" || !empty(XCC) 140# Try to import COMPILER_TYPE and COMPILER_VERSION from parent make. 141# The value is only used/exported for the same environment that impacts 142# CC and COMPILER_* settings here. 143_exported_vars= ${X_}COMPILER_TYPE ${X_}COMPILER_VERSION \ 144 ${X_}COMPILER_FREEBSD_VERSION 145${X_}_cc_hash= ${${cc}}${MACHINE}${PATH} 146${X_}_cc_hash:= ${${X_}_cc_hash:hash} 147# Only import if none of the vars are set somehow else. 148_can_export= yes 149.for var in ${_exported_vars} 150.if defined(${var}) 151_can_export= no 152.endif 153.endfor 154.if ${_can_export} == yes 155.for var in ${_exported_vars} 156.if defined(${var}.${${X_}_cc_hash}) 157${var}= ${${var}.${${X_}_cc_hash}} 158.endif 159.endfor 160.endif 161 162.if ${cc} == "CC" || (${cc} == "XCC" && ${XCC} != ${CC}) 163.if ${MACHINE} == "common" 164# common is a pseudo machine for architecture independent 165# generated files - thus there is no compiler. 166${X_}COMPILER_TYPE= none 167${X_}COMPILER_VERSION= 0 168${X_}COMPILER_FREEBSD_VERSION= 0 169.elif !defined(${X_}COMPILER_TYPE) || !defined(${X_}COMPILER_VERSION) 170_v!= ${${cc}:N${CCACHE_BIN}} --version || echo 0.0.0 171 172.if !defined(${X_}COMPILER_TYPE) 173. if ${${cc}:T:M*gcc*} 174${X_}COMPILER_TYPE:= gcc 175. elif ${${cc}:T:M*clang*} 176${X_}COMPILER_TYPE:= clang 177. elif ${_v:Mgcc} 178${X_}COMPILER_TYPE:= gcc 179. elif ${_v:M\(GCC\)} || ${_v:M*GNU} 180${X_}COMPILER_TYPE:= gcc 181. elif ${_v:Mclang} || ${_v:M(clang-*.*.*)} 182${X_}COMPILER_TYPE:= clang 183. else 184.error Unable to determine compiler type for ${cc}=${${cc}}. Consider setting ${X_}COMPILER_TYPE. 185. endif 186.endif 187.if !defined(${X_}COMPILER_VERSION) 188${X_}COMPILER_VERSION!=echo "${_v:M[1-9].[0-9]*}" | awk -F. '{print $$1 * 10000 + $$2 * 100 + $$3;}' 189.endif 190.undef _v 191.endif 192.if !defined(${X_}COMPILER_FREEBSD_VERSION) 193${X_}COMPILER_FREEBSD_VERSION!= { echo "__FreeBSD_cc_version" | ${${cc}:N${CCACHE_BIN}} -E - 2>/dev/null || echo __FreeBSD_cc_version; } | sed -n '$$p' 194# If we get a literal "__FreeBSD_cc_version" back then the compiler 195# is a non-FreeBSD build that doesn't support it or some other error 196# occurred. 197.if ${${X_}COMPILER_FREEBSD_VERSION} == "__FreeBSD_cc_version" 198${X_}COMPILER_FREEBSD_VERSION= unknown 199.endif 200.endif 201 202${X_}COMPILER_FEATURES= 203.if ${${X_}COMPILER_TYPE} == "clang" || \ 204 (${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 40800) 205${X_}COMPILER_FEATURES+= c++11 206.endif 207.if ${${X_}COMPILER_TYPE} == "clang" && ${${X_}COMPILER_VERSION} >= 60000 208${X_}COMPILER_FEATURES+= retpoline 209.endif 210 211.else 212# Use CC's values 213X_COMPILER_TYPE= ${COMPILER_TYPE} 214X_COMPILER_VERSION= ${COMPILER_VERSION} 215X_COMPILER_FREEBSD_VERSION= ${COMPILER_FREEBSD_VERSION} 216X_COMPILER_FEATURES= ${COMPILER_FEATURES} 217.endif # ${cc} == "CC" || (${cc} == "XCC" && ${XCC} != ${CC}) 218 219# Export the values so sub-makes don't have to look them up again, using the 220# hash key computed above. 221.for var in ${_exported_vars} 222${var}.${${X_}_cc_hash}:= ${${var}} 223.export-env ${var}.${${X_}_cc_hash} 224.undef ${var}.${${X_}_cc_hash} 225.endfor 226 227.endif # ${cc} == "CC" || !empty(XCC) 228.endfor # .for cc in CC XCC 229 230.if !defined(_NO_INCLUDE_LINKERMK) 231.include <bsd.linker.mk> 232.endif 233.endif # defined(_NO_INCLUDE_COMPILERMK) 234.endif # !target(__<bsd.compiler.mk>__) 235