489377c0a4
I noticed that when we build libraries for a different ABI (in CheriBSD) we
were calling ${XCC}/${LD} --version for every directory. It turns out that
this was caused by bsd.compat.mk explicitly setting (X_)COMPILER variables
for that build stage and this stops the _can_export logic from working.
To fix this, we change the check to only set _can_export=no if the variable
is set and it is set to a different value than the cached value.
This noticeably speeds up the tree walk while building compat libraries.
During an upstream amd64 buildworld this also removes 8 --version calls.
Obtained from: CheriBSD
Reviewed By: brooks, emaste
Differential Revision: https://reviews.freebsd.org/D25986
245 lines
9.0 KiB
Makefile
245 lines
9.0 KiB
Makefile
# $FreeBSD$
|
|
|
|
# Setup variables for the compiler
|
|
#
|
|
# COMPILER_TYPE is the major type of compiler. Currently gcc and clang support
|
|
# automatic detection. Other compiler types can be shoe-horned in, but require
|
|
# explicit setting of the compiler type. The compiler type can also be set
|
|
# explicitly if, say, you install gcc as clang...
|
|
#
|
|
# COMPILER_VERSION is a numeric constant equal to:
|
|
# major * 10000 + minor * 100 + tiny
|
|
# It too can be overridden on the command line. When testing it, be sure to
|
|
# make sure that you are limiting the test to a specific compiler. Testing
|
|
# against 30300 for gcc likely isn't what you wanted (since versions of gcc
|
|
# prior to 4.2 likely have no prayer of working).
|
|
#
|
|
# COMPILER_FREEBSD_VERSION is the compiler's __FreeBSD_cc_version value.
|
|
#
|
|
# COMPILER_FEATURES will contain one or more of the following, based on
|
|
# compiler support for that feature:
|
|
#
|
|
# - c++17: supports full (or nearly full) C++17 programming environment.
|
|
# - c++14: supports full (or nearly full) C++14 programming environment.
|
|
# - c++11: supports full (or nearly full) C++11 programming environment.
|
|
# - retpoline: supports the retpoline speculative execution vulnerability
|
|
# mitigation.
|
|
#
|
|
# These variables with an X_ prefix will also be provided if XCC is set.
|
|
#
|
|
# This file may be included multiple times, but only has effect the first time.
|
|
#
|
|
|
|
.if !target(__<bsd.compiler.mk>__)
|
|
__<bsd.compiler.mk>__:
|
|
|
|
.include <bsd.opts.mk>
|
|
|
|
.if defined(_NO_INCLUDE_COMPILERMK)
|
|
# If _NO_INCLUDE_COMPILERMK is set we are doing a make obj/cleandir/cleanobj
|
|
# and might not have a valid compiler in $PATH yet. In this case just set the
|
|
# variables that are expected by the other .mk files and return
|
|
COMPILER_TYPE=none
|
|
X_COMPILER_TYPE=none
|
|
COMPILER_VERSION=0
|
|
X_COMPILER_VERSION=0
|
|
COMPILER_FEATURES=none
|
|
.else
|
|
# command = /usr/local/bin/ccache cc ...
|
|
# wrapper = /usr/local/libexec/ccache/cc ...
|
|
CCACHE_BUILD_TYPE?= command
|
|
# Handle ccache after CC is determined, but not if CC/CXX are already
|
|
# overridden with a manual setup.
|
|
.if ${MK_CCACHE_BUILD:Uno} == "yes" && \
|
|
!make(test-system-*) && !make(print-dir) && !make(showconfig) && \
|
|
(${CC:M*ccache/world/*} == "" || ${CXX:M*ccache/world/*} == "")
|
|
# CC is always prepended with the ccache wrapper rather than modifying
|
|
# PATH since it is more clear that ccache is used and avoids wasting time
|
|
# for mkdep/linking/asm builds.
|
|
LOCALBASE?= /usr/local
|
|
CCACHE_WRAPPER_PATH?= ${LOCALBASE}/libexec/ccache
|
|
CCACHE_BIN?= ${LOCALBASE}/bin/ccache
|
|
.if exists(${CCACHE_BIN})
|
|
# Export to ensure sub-makes can filter it out for mkdep/linking and
|
|
# to chain down into kernel build which won't include this file.
|
|
.export CCACHE_BIN
|
|
# Expand and export some variables so they may be based on make vars.
|
|
# This allows doing something like the following in the environment:
|
|
# CCACHE_BASEDIR='${SRCTOP:H}' MAKEOBJDIRPREFIX='${SRCTOP:H}/obj'
|
|
.for var in CCACHE_LOGFILE CCACHE_BASEDIR
|
|
.if defined(${var})
|
|
${var}:= ${${var}}
|
|
.export ${var}
|
|
.endif
|
|
.endfor
|
|
# Handle bootstrapped compiler changes properly by hashing their content
|
|
# rather than checking mtime. For external compilers it should be safe
|
|
# to use the more optimal mtime check.
|
|
# XXX: CCACHE_COMPILERCHECK= string:<compiler_version, compiler_build_rev, compiler_patch_rev, compiler_default_target, compiler_default_sysroot>
|
|
.if ${CC:N${CCACHE_BIN}:[1]:M/*} == ""
|
|
CCACHE_COMPILERCHECK?= content
|
|
.else
|
|
CCACHE_COMPILERCHECK?= mtime
|
|
.endif
|
|
.export CCACHE_COMPILERCHECK
|
|
# Ensure no bogus CCACHE_PATH leaks in which might avoid the in-tree compiler.
|
|
.if !empty(CCACHE_PATH)
|
|
CCACHE_PATH=
|
|
.export CCACHE_PATH
|
|
.endif
|
|
.if ${CCACHE_BUILD_TYPE} == "command"
|
|
# Remove ccache from the PATH to prevent double calls and wasted CPP/LD time.
|
|
PATH:= ${PATH:C,:?${CCACHE_WRAPPER_PATH}(/world)?(:$)?,,g}
|
|
# Override various toolchain vars.
|
|
.for var in CC CXX HOST_CC HOST_CXX
|
|
.if defined(${var}) && ${${var}:M${CCACHE_BIN}} == ""
|
|
${var}:= ${CCACHE_BIN} ${${var}}
|
|
.endif
|
|
.endfor
|
|
.else
|
|
# Need to ensure CCACHE_WRAPPER_PATH is the first in ${PATH}
|
|
PATH:= ${PATH:C,:?${CCACHE_WRAPPER_PATH}(/world)?(:$)?,,g}
|
|
PATH:= ${CCACHE_WRAPPER_PATH}:${PATH}
|
|
CCACHE_WRAPPER_PATH_PFX= ${CCACHE_WRAPPER_PATH}:
|
|
.endif # ${CCACHE_BUILD_TYPE} == "command"
|
|
# GCC does not need the CCACHE_CPP2 hack enabled by default in devel/ccache.
|
|
# The port enables it due to ccache passing preprocessed C to clang
|
|
# which fails with -Wparentheses-equality, -Wtautological-compare, and
|
|
# -Wself-assign on macro-expanded lines.
|
|
.if defined(COMPILER_TYPE) && ${COMPILER_TYPE} == "gcc"
|
|
CCACHE_NOCPP2= 1
|
|
.export CCACHE_NOCPP2
|
|
.endif
|
|
# Canonicalize CCACHE_DIR for meta mode usage.
|
|
.if !defined(CCACHE_DIR)
|
|
CCACHE_DIR!= ${CCACHE_BIN} -p | awk '$$2 == "cache_dir" {print $$4}'
|
|
.export CCACHE_DIR
|
|
.endif
|
|
.if !empty(CCACHE_DIR) && empty(.MAKE.META.IGNORE_PATHS:M${CCACHE_DIR})
|
|
CCACHE_DIR:= ${CCACHE_DIR:tA}
|
|
.MAKE.META.IGNORE_PATHS+= ${CCACHE_DIR}
|
|
.export CCACHE_DIR
|
|
.endif
|
|
# ccache doesn't affect build output so let it slide for meta mode
|
|
# comparisons.
|
|
.MAKE.META.IGNORE_PATHS+= ${CCACHE_BIN}
|
|
ccache-print-options: .PHONY
|
|
@${CCACHE_BIN} -p
|
|
.endif # exists(${CCACHE_BIN})
|
|
.endif # ${MK_CCACHE_BUILD} == "yes"
|
|
|
|
_cc_vars=CC $${_empty_var_}
|
|
.if !empty(_WANT_TOOLCHAIN_CROSS_VARS)
|
|
# Only the toplevel makefile needs to compute the X_COMPILER_* variables.
|
|
# Skipping the computation of the unused X_COMPILER_* in the subdirectory
|
|
# makefiles can save a noticeable amount of time when walking the whole source
|
|
# tree (e.g. during make includes, etc.).
|
|
_cc_vars+=XCC X_
|
|
.endif
|
|
|
|
.for cc X_ in ${_cc_vars}
|
|
.if ${cc} == "CC" || !empty(XCC)
|
|
# Try to import COMPILER_TYPE and COMPILER_VERSION from parent make.
|
|
# The value is only used/exported for the same environment that impacts
|
|
# CC and COMPILER_* settings here.
|
|
_exported_vars= ${X_}COMPILER_TYPE ${X_}COMPILER_VERSION \
|
|
${X_}COMPILER_FREEBSD_VERSION ${X_}COMPILER_RESOURCE_DIR
|
|
${X_}_cc_hash= ${${cc}}${MACHINE}${PATH}
|
|
${X_}_cc_hash:= ${${X_}_cc_hash:hash}
|
|
# Only import if none of the vars are set differently somehow else.
|
|
_can_export= yes
|
|
.for var in ${_exported_vars}
|
|
.if defined(${var}) && (!defined(${var}__${${X_}_cc_hash}) || ${${var}__${${X_}_cc_hash}} != ${${var}})
|
|
.if defined(${var}__${${X_}_ld_hash})
|
|
.info "Cannot import ${X_}COMPILER variables since cached ${var} is different: ${${var}__${${X_}_cc_hash}} != ${${var}}"
|
|
.endif
|
|
_can_export= no
|
|
.endif
|
|
.endfor
|
|
.if ${_can_export} == yes
|
|
.for var in ${_exported_vars}
|
|
.if defined(${var}__${${X_}_cc_hash})
|
|
${var}= ${${var}__${${X_}_cc_hash}}
|
|
.endif
|
|
.endfor
|
|
.endif
|
|
|
|
.if ${cc} == "CC" || (${cc} == "XCC" && ${XCC} != ${CC})
|
|
.if ${MACHINE} == "common"
|
|
# common is a pseudo machine for architecture independent
|
|
# generated files - thus there is no compiler.
|
|
${X_}COMPILER_TYPE= none
|
|
${X_}COMPILER_VERSION= 0
|
|
${X_}COMPILER_FREEBSD_VERSION= 0
|
|
.elif !defined(${X_}COMPILER_TYPE) || !defined(${X_}COMPILER_VERSION)
|
|
_v!= ${${cc}:N${CCACHE_BIN}} --version || echo 0.0.0
|
|
|
|
.if !defined(${X_}COMPILER_TYPE)
|
|
. if ${${cc}:T:M*gcc*}
|
|
${X_}COMPILER_TYPE:= gcc
|
|
. elif ${${cc}:T:M*clang*}
|
|
${X_}COMPILER_TYPE:= clang
|
|
. elif ${_v:Mgcc}
|
|
${X_}COMPILER_TYPE:= gcc
|
|
. elif ${_v:M\(GCC\)} || ${_v:M*GNU}
|
|
${X_}COMPILER_TYPE:= gcc
|
|
. elif ${_v:Mclang} || ${_v:M(clang-*.*.*)}
|
|
${X_}COMPILER_TYPE:= clang
|
|
. else
|
|
.error Unable to determine compiler type for ${cc}=${${cc}}. Consider setting ${X_}COMPILER_TYPE.
|
|
. endif
|
|
.endif
|
|
.if !defined(${X_}COMPILER_VERSION)
|
|
${X_}COMPILER_VERSION!=echo "${_v:M[1-9]*.[0-9]*}" | awk -F. '{print $$1 * 10000 + $$2 * 100 + $$3;}'
|
|
.endif
|
|
.undef _v
|
|
.endif
|
|
.if !defined(${X_}COMPILER_FREEBSD_VERSION)
|
|
${X_}COMPILER_FREEBSD_VERSION!= { echo "__FreeBSD_cc_version" | ${${cc}:N${CCACHE_BIN}} -E - 2>/dev/null || echo __FreeBSD_cc_version; } | sed -n '$$p'
|
|
# If we get a literal "__FreeBSD_cc_version" back then the compiler
|
|
# is a non-FreeBSD build that doesn't support it or some other error
|
|
# occurred.
|
|
.if ${${X_}COMPILER_FREEBSD_VERSION} == "__FreeBSD_cc_version"
|
|
${X_}COMPILER_FREEBSD_VERSION= unknown
|
|
.endif
|
|
.endif
|
|
|
|
.if !defined(${X_}COMPILER_RESOURCE_DIR)
|
|
${X_}COMPILER_RESOURCE_DIR!= ${${cc}:N${CCACHE_BIN}} -print-resource-dir 2>/dev/null || echo unknown
|
|
.endif
|
|
|
|
${X_}COMPILER_FEATURES= c++11 c++14
|
|
.if ${${X_}COMPILER_TYPE} == "clang" || \
|
|
(${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 70000)
|
|
${X_}COMPILER_FEATURES+= c++17
|
|
.endif
|
|
.if ${${X_}COMPILER_TYPE} == "clang"
|
|
${X_}COMPILER_FEATURES+= retpoline
|
|
.endif
|
|
|
|
.else
|
|
# Use CC's values
|
|
X_COMPILER_TYPE= ${COMPILER_TYPE}
|
|
X_COMPILER_VERSION= ${COMPILER_VERSION}
|
|
X_COMPILER_FREEBSD_VERSION= ${COMPILER_FREEBSD_VERSION}
|
|
X_COMPILER_FEATURES= ${COMPILER_FEATURES}
|
|
X_COMPILER_RESOURCE_DIR= ${COMPILER_RESOURCE_DIR}
|
|
.endif # ${cc} == "CC" || (${cc} == "XCC" && ${XCC} != ${CC})
|
|
|
|
# Export the values so sub-makes don't have to look them up again, using the
|
|
# hash key computed above.
|
|
.for var in ${_exported_vars}
|
|
${var}__${${X_}_cc_hash}:= ${${var}}
|
|
.export-env ${var}__${${X_}_cc_hash}
|
|
.undef ${var}__${${X_}_cc_hash}
|
|
.endfor
|
|
|
|
.endif # ${cc} == "CC" || !empty(XCC)
|
|
.endfor # .for cc in CC XCC
|
|
|
|
.if !defined(_NO_INCLUDE_LINKERMK)
|
|
.include <bsd.linker.mk>
|
|
.endif
|
|
.endif # defined(_NO_INCLUDE_COMPILERMK)
|
|
.endif # !target(__<bsd.compiler.mk>__)
|