freebsd-dev/share/mk/bsd.compiler.mk
Bryan Drewery 6c24213e61 WITH_CCACHE_BUILD + WITH_META_MODE: Ignore ccache changes.
Ccache will not affect the output of the objects, so just ignore it for
meta mode handling.  This avoids having everything rebuild if ccache is
updated.

Sponsored by:	EMC / Isilon Storage Division
2016-06-03 19:25:45 +00:00

198 lines
6.8 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 overriden 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++11 : supports full (or nearly full) C++11 programming environment.
#
# 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>
# Handle ccache after CC is determined, but not if CC/CXX are already
# overridden with a manual setup.
.if ${MK_CCACHE_BUILD:Uno} == "yes" && \
!make(showconfig) && \
(${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
# Remove ccache from the PATH to prevent double calls and wasted CPP/LD time.
PATH:= ${PATH:C,:?${CCACHE_WRAPPER_PATH}(/world)?(:$)?,,g}
# Ensure no bogus CCACHE_PATH leaks in which might avoid the in-tree compiler.
.if !empty(CCACHE_PATH)
CCACHE_PATH=
.export CCACHE_PATH
.endif
# Override various toolchain vars.
.for var in CC CXX HOST_CC HOST_CXX
.if defined(${var}) && ${${var}:M${CCACHE_BIN}} == ""
${var}:= ${CCACHE_BIN} ${${var}}
.endif
.endfor
# 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"
.for cc X_ in CC $${_empty_var_} XCC X_
.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_}_cc_hash= ${${cc}}${MACHINE}${PATH}
${X_}_cc_hash:= ${${X_}_cc_hash:hash}
# Only import if none of the vars are set somehow else.
_can_export= yes
.for var in ${_exported_vars}
.if defined(${var})
_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}} --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\(GCC\)}
${X_}COMPILER_TYPE:= gcc
. elif ${_v:Mclang}
${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 + $$3;}'
.endif
.undef _v
.endif
.if !defined(${X_}COMPILER_FREEBSD_VERSION)
${X_}COMPILER_FREEBSD_VERSION!= { echo "__FreeBSD_cc_version" | ${${cc}} -E - 2>/dev/null || echo __FreeBSD_cc_version; } | sed -n '$$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 ${${X_}COMPILER_TYPE} == "clang" || \
(${${X_}COMPILER_TYPE} == "gcc" && ${${X_}COMPILER_VERSION} >= 40800)
${X_}COMPILER_FEATURES= c++11
.else
${X_}COMPILER_FEATURES=
.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}
.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
.endif # !target(__<bsd.compiler.mk>__)