freebsd-dev/sys/conf/kern.post.mk

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# $FreeBSD$
# Part of a unified Makefile for building kernels. This part includes all
# the definitions that need to be after all the % directives except %RULES
# and ones that act like they are part of %RULES.
#
# Most make variables should not be defined in this file. Instead, they
# should be defined in the kern.pre.mk so that port makefiles can
# override or augment them.
# In case the config had a makeoptions DESTDIR...
.if defined(DESTDIR)
MKMODULESENV+= DESTDIR="${DESTDIR}"
.endif
SYSDIR?= ${S:C;^[^/];${.CURDIR}/&;:tA}
MKMODULESENV+= KERNBUILDDIR="${.CURDIR}" SYSDIR="${SYSDIR}"
.if defined(CONF_CFLAGS)
MKMODULESENV+= CONF_CFLAGS="${CONF_CFLAGS}"
.endif
.if defined(WITH_CTF)
MKMODULESENV+= WITH_CTF="${WITH_CTF}"
.endif
.if defined(WITH_EXTRA_TCP_STACKS)
MKMODULESENV+= WITH_EXTRA_TCP_STACKS="${WITH_EXTRA_TCP_STACKS}"
.endif
# Allow overriding the kernel debug directory, so kernel and user debug may be
# installed in different directories. Setting it to "" restores the historical
# behavior of installing debug files in the kernel directory.
KERN_DEBUGDIR?= ${DEBUGDIR}
.MAIN: all
.for target in all clean cleandepend cleandir clobber depend install \
${_obj} reinstall tags
${target}: kernel-${target}
.if !defined(MODULES_WITH_WORLD) && !defined(NO_MODULES) && exists($S/modules)
${target}: modules-${target}
modules-${target}:
cd $S/modules; ${MKMODULESENV} ${MAKE} \
${target:S/^reinstall$/install/:S/^clobber$/cleandir/}
.endif
.endfor
# Handle ports (as defined by the user) that build kernel modules
.if !defined(NO_MODULES) && defined(PORTS_MODULES)
#
# The ports tree needs some environment variables defined to match the new kernel
#
# Ports search for some dependencies in PATH, so add the location of the installed files
LOCALBASE?= /usr/local
# SRC_BASE is how the ports tree refers to the location of the base source files
.if !defined(SRC_BASE)
SRC_BASE= ${SYSDIR:H:tA}
.endif
# OSVERSION is used by some ports to determine build options
.if !defined(OSRELDATE)
# Definition copied from src/Makefile.inc1
OSRELDATE!= awk '/^\#define[[:space:]]*__FreeBSD_version/ { print $$3 }' \
${MAKEOBJDIRPREFIX}${SRC_BASE}/include/osreldate.h
.endif
# Keep the related ports builds in the obj directory so that they are only rebuilt once per kernel build
WRKDIRPREFIX?= ${.OBJDIR}
PORTSMODULESENV=\
env \
-u CC \
-u CXX \
-u CPP \
PATH=${PATH}:${LOCALBASE}/bin:${LOCALBASE}/sbin \
SRC_BASE=${SRC_BASE} \
OSVERSION=${OSRELDATE} \
WRKDIRPREFIX=${WRKDIRPREFIX}
# The WRKDIR needs to be cleaned before building, and trying to change the target
# with a :C pattern below results in install -> instclean
all:
.for __i in ${PORTS_MODULES}
@${ECHO} "===> Ports module ${__i} (all)"
cd $${PORTSDIR:-/usr/ports}/${__i}; ${PORTSMODULESENV} ${MAKE} -B clean build
.endfor
.for __target in install reinstall clean
${__target}: ports-${__target}
2005-02-25 02:25:38 +00:00
ports-${__target}:
.for __i in ${PORTS_MODULES}
@${ECHO} "===> Ports module ${__i} (${__target})"
cd $${PORTSDIR:-/usr/ports}/${__i}; ${PORTSMODULESENV} ${MAKE} -B ${__target:C/install/deinstall reinstall/:C/reinstall/deinstall reinstall/}
.endfor
.endfor
.endif
.ORDER: kernel-install modules-install
beforebuild: .PHONY
kernel-all: beforebuild .WAIT ${KERNEL_KO} ${KERNEL_EXTRA}
kernel-cleandir: kernel-clean kernel-cleandepend
kernel-clobber:
find . -maxdepth 1 ! -type d ! -name version -delete
kernel-obj:
.if !defined(MODULES_WITH_WORLD) && !defined(NO_MODULES) && exists($S/modules)
modules: modules-all
.if !defined(NO_MODULES_OBJ)
modules-all modules-depend: modules-obj
.endif
.endif
.if !defined(DEBUG)
FULLKERNEL= ${KERNEL_KO}
.else
FULLKERNEL= ${KERNEL_KO}.full
${KERNEL_KO}: ${FULLKERNEL} ${KERNEL_KO}.debug
${OBJCOPY} --strip-debug --add-gnu-debuglink=${KERNEL_KO}.debug \
${FULLKERNEL} ${.TARGET}
${KERNEL_KO}.debug: ${FULLKERNEL}
${OBJCOPY} --only-keep-debug ${FULLKERNEL} ${.TARGET}
install.debug reinstall.debug: gdbinit
cd ${.CURDIR}; ${MAKE} ${.TARGET:R}
# Install gdbinit files for kernel debugging.
gdbinit:
grep -v '# XXX' ${S}/../tools/debugscripts/dot.gdbinit | \
sed "s:MODPATH:${.OBJDIR}/modules:" > .gdbinit
cp ${S}/../tools/debugscripts/gdbinit.kernel ${.CURDIR}
.if exists(${S}/../tools/debugscripts/gdbinit.${MACHINE_CPUARCH})
cp ${S}/../tools/debugscripts/gdbinit.${MACHINE_CPUARCH} \
${.CURDIR}/gdbinit.machine
.endif
.endif
${FULLKERNEL}: ${SYSTEM_DEP} vers.o
@rm -f ${.TARGET}
@echo linking ${.TARGET}
${SYSTEM_LD}
.if !empty(MD_ROOT_SIZE_CONFIGURED) && defined(MFS_IMAGE)
@sh ${S}/tools/embed_mfs.sh ${.TARGET} ${MFS_IMAGE}
.endif
.if ${MK_CTF} != "no"
@echo ${CTFMERGE} ${CTFFLAGS} -o ${.TARGET} ...
@${CTFMERGE} ${CTFFLAGS} -o ${.TARGET} ${SYSTEM_OBJS} vers.o
.endif
.if !defined(DEBUG)
${OBJCOPY} --strip-debug ${.TARGET}
.endif
${SYSTEM_LD_TAIL}
OBJS_DEPEND_GUESS+= assym.s vnode_if.h ${BEFORE_DEPEND:M*.h} \
${MFILES:T:S/.m$/.h/}
LNFILES= ${CFILES:T:S/.c$/.ln/}
.for mfile in ${MFILES}
# XXX the low quality .m.o rules gnerated by config are normally used
# instead of the .m.c rules here.
${mfile:T:S/.m$/.c/}: ${mfile}
${AWK} -f $S/tools/makeobjops.awk ${mfile} -c
${mfile:T:S/.m$/.h/}: ${mfile}
${AWK} -f $S/tools/makeobjops.awk ${mfile} -h
.endfor
kernel-clean:
rm -f *.o *.so *.pico *.ko *.s eddep errs \
${FULLKERNEL} ${KERNEL_KO} ${KERNEL_KO}.debug \
linterrs tags vers.c \
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vnode_if.c vnode_if.h vnode_if_newproto.h vnode_if_typedef.h \
${MFILES:T:S/.m$/.c/} ${MFILES:T:S/.m$/.h/} \
${CLEAN}
lint: ${LNFILES}
${LINT} ${LINTKERNFLAGS} ${CFLAGS:M-[DILU]*} ${.ALLSRC} 2>&1 | \
tee -a linterrs
# This is a hack. BFD "optimizes" away dynamic mode if there are no
# dynamic references. We could probably do a '-Bforcedynamic' mode like
# in the a.out ld. For now, this works.
HACK_EXTRA_FLAGS?= -shared
hack.pico: Makefile
:> hack.c
${CC} ${HACK_EXTRA_FLAGS} -nostdlib hack.c -o hack.pico
rm -f hack.c
assym.s: $S/kern/genassym.sh genassym.o
NM='${NM}' NMFLAGS='${NMFLAGS}' sh $S/kern/genassym.sh genassym.o > ${.TARGET}
genassym.o: $S/$M/$M/genassym.c
${CC} -c ${CFLAGS:N-flto:N-fno-common} $S/$M/$M/genassym.c
${SYSTEM_OBJS} genassym.o vers.o: opt_global.h
.if !empty(.MAKE.MODE:Unormal:Mmeta) && empty(.MAKE.MODE:Unormal:Mnofilemon)
_meta_filemon= 1
.endif
# Skip reading .depend when not needed to speed up tree-walks and simple
# lookups. For install, only do this if no other targets are specified.
# Also skip generating or including .depend.* files if in meta+filemon mode
# since it will track dependencies itself. OBJS_DEPEND_GUESS is still used.
.if !empty(.MAKEFLAGS:M-V${_V_READ_DEPEND}) || make(obj) || make(clean*) || \
${.TARGETS:M*install*} == ${.TARGETS} || \
make(kernel-obj) || make(kernel-clean*) || \
make(kernel-install*) || defined(_meta_filemon)
_SKIP_READ_DEPEND= 1
.MAKE.DEPENDFILE= /dev/null
.endif
kernel-depend: .depend
SRCS= assym.s vnode_if.h ${BEFORE_DEPEND} ${CFILES} \
${SYSTEM_CFILES} ${GEN_CFILES} ${SFILES} \
${MFILES:T:S/.m$/.h/}
DEPENDFILES= .depend .depend.*
DEPENDOBJS+= ${SYSTEM_OBJS} genassym.o
DEPENDFILES_OBJS= ${DEPENDOBJS:O:u:C/^/.depend./}
.if ${MAKE_VERSION} < 20160220
DEPEND_MP?= -MP
.endif
DEPEND_CFLAGS+= -MD ${DEPEND_MP} -MF.depend.${.TARGET}
Add a FAST_DEPEND option, off by default, which speeds up the build significantly. This speeds up buildworld by 16% on my system and buildkernel by 35%. Rather than calling mkdep(1), which is just a wrapper around 'cc -E', use the modern -MD -MT -MF flags to gather and generate dependencies during compilation. This flag was introduced in GCC "a long time ago", in GCC 3.0, and is also supported by Clang. (It appears that ICC also supports this but I do not have access to test it). This avoids running the preprocessor *twice* for every build, in both 'make depend' and 'make all'. This is especially noticeable when using ccache since it does not cache preprocessor results from mkdep(1) / 'cc -E', but still speeds up compilation with the -MD flags. For 'make depend' a tree-walk is still done to ensure that all DPSRCS are generated when expected, and that beforedepend/afterdepend and _EXTRADEPEND are all still respected. In time this may change but for now I've been conservative. The time for a tree-walk with -j combined with SUBDIR_PARALLEL is not significant. For example, it takes about 9 seconds with -j15 to walk all of src/ for 'make depend' now on my system. A .depend file is still generated with the various rules that apply to the final target, or custom rules. Otherwise there are now per-built-object-file .depend files, such as .depend.filename.o. These are included directly by make rather than populating .depend with a loop and .depend lines, which only added overhead to the now almost-NOP 'make depend' phase. Before this I experimented with having mkdep(1) called in parallel per-file. While this improved the kernel and lib/libc 'make depend' phase, it resulted in slower build times overall. The -M flags are removed from CFLAGS when linking since they have no effect. Enabling this by default, for src or out-of-src, can be done once more testing has been done, such as a ports exp-run, and with more compilers. The system I used for testing was: WITNESS Build options: -j20 WITH_LLDB=yes WITH_DEBUG_FILES=yes WITH_FAST_DEPEND=yes DISK: ZFS 3-way mirror with very slow disks using SSD l2arc/log. The arc was fully populated with src tree files. RAM: 76GiB CPU: Intel(R) Xeon(R) CPU L5520 @2.27GHz 2 package(s) x 4 core(s) x 2 SMT threads = hw.ncpu=16 buildworld: x buildworld-before + buildworld-fastdep +-------------------------------------------------------------------------------+ |+ | |+ | |+ xx x| | |_MA___|| |A | +-------------------------------------------------------------------------------+ N Min Max Median Avg Stddev x 3 3744.13 3794.31 3752.25 3763.5633 26.935139 + 3 3153.34 3155.16 3154.2 3154.2333 0.91045776 Difference at 95.0% confidence -609.33 +/- 43.1943 -16.1902% +/- 1.1477% (Student's t, pooled s = 19.0569) buildkernel: x buildkernel-before + buildkernel-fastdep +-------------------------------------------------------------------------------+ |+ x | |++ xx| | A|| |A| | +-------------------------------------------------------------------------------+ N Min Max Median Avg Stddev x 3 571.57 573.94 571.79 572.43333 1.3094401 + 3 369.12 370.57 369.3 369.66333 0.79033748 Difference at 95.0% confidence -202.77 +/- 2.45131 -35.4225% +/- 0.428227% (Student's t, pooled s = 1.0815) Sponsored by: EMC / Isilon Storage Division MFC after: 3 weeks Relnotes: yes
2015-11-06 04:45:29 +00:00
DEPEND_CFLAGS+= -MT${.TARGET}
.if !defined(_meta_filemon)
.if defined(.PARSEDIR)
# Only add in DEPEND_CFLAGS for CFLAGS on files we expect from DEPENDOBJS
# as those are the only ones we will include.
DEPEND_CFLAGS_CONDITION= "${DEPENDOBJS:M${.TARGET}}" != ""
CFLAGS+= ${${DEPEND_CFLAGS_CONDITION}:?${DEPEND_CFLAGS}:}
.else
Add a FAST_DEPEND option, off by default, which speeds up the build significantly. This speeds up buildworld by 16% on my system and buildkernel by 35%. Rather than calling mkdep(1), which is just a wrapper around 'cc -E', use the modern -MD -MT -MF flags to gather and generate dependencies during compilation. This flag was introduced in GCC "a long time ago", in GCC 3.0, and is also supported by Clang. (It appears that ICC also supports this but I do not have access to test it). This avoids running the preprocessor *twice* for every build, in both 'make depend' and 'make all'. This is especially noticeable when using ccache since it does not cache preprocessor results from mkdep(1) / 'cc -E', but still speeds up compilation with the -MD flags. For 'make depend' a tree-walk is still done to ensure that all DPSRCS are generated when expected, and that beforedepend/afterdepend and _EXTRADEPEND are all still respected. In time this may change but for now I've been conservative. The time for a tree-walk with -j combined with SUBDIR_PARALLEL is not significant. For example, it takes about 9 seconds with -j15 to walk all of src/ for 'make depend' now on my system. A .depend file is still generated with the various rules that apply to the final target, or custom rules. Otherwise there are now per-built-object-file .depend files, such as .depend.filename.o. These are included directly by make rather than populating .depend with a loop and .depend lines, which only added overhead to the now almost-NOP 'make depend' phase. Before this I experimented with having mkdep(1) called in parallel per-file. While this improved the kernel and lib/libc 'make depend' phase, it resulted in slower build times overall. The -M flags are removed from CFLAGS when linking since they have no effect. Enabling this by default, for src or out-of-src, can be done once more testing has been done, such as a ports exp-run, and with more compilers. The system I used for testing was: WITNESS Build options: -j20 WITH_LLDB=yes WITH_DEBUG_FILES=yes WITH_FAST_DEPEND=yes DISK: ZFS 3-way mirror with very slow disks using SSD l2arc/log. The arc was fully populated with src tree files. RAM: 76GiB CPU: Intel(R) Xeon(R) CPU L5520 @2.27GHz 2 package(s) x 4 core(s) x 2 SMT threads = hw.ncpu=16 buildworld: x buildworld-before + buildworld-fastdep +-------------------------------------------------------------------------------+ |+ | |+ | |+ xx x| | |_MA___|| |A | +-------------------------------------------------------------------------------+ N Min Max Median Avg Stddev x 3 3744.13 3794.31 3752.25 3763.5633 26.935139 + 3 3153.34 3155.16 3154.2 3154.2333 0.91045776 Difference at 95.0% confidence -609.33 +/- 43.1943 -16.1902% +/- 1.1477% (Student's t, pooled s = 19.0569) buildkernel: x buildkernel-before + buildkernel-fastdep +-------------------------------------------------------------------------------+ |+ x | |++ xx| | A|| |A| | +-------------------------------------------------------------------------------+ N Min Max Median Avg Stddev x 3 571.57 573.94 571.79 572.43333 1.3094401 + 3 369.12 370.57 369.3 369.66333 0.79033748 Difference at 95.0% confidence -202.77 +/- 2.45131 -35.4225% +/- 0.428227% (Student's t, pooled s = 1.0815) Sponsored by: EMC / Isilon Storage Division MFC after: 3 weeks Relnotes: yes
2015-11-06 04:45:29 +00:00
CFLAGS+= ${DEPEND_CFLAGS}
.endif
.if !defined(_SKIP_READ_DEPEND)
.for __depend_obj in ${DEPENDFILES_OBJS}
.if ${MAKE_VERSION} < 20160220
.sinclude "${.OBJDIR}/${__depend_obj}"
.else
.dinclude "${.OBJDIR}/${__depend_obj}"
.endif
.endfor
.endif # !defined(_SKIP_READ_DEPEND)
.endif # !defined(_meta_filemon)
FAST_DEPEND: Always run depend via beforebuild which removes many hacks. This will generate dependencies rather than depending on the previous behavior of depending on the guessed OBJS: *.h dependecies or a user running 'make depend'. Experimentation showed that depending only on headers was not enough and prone to .ORDER errors. Downstream users may also have added dependencies into beforedepend or afterdepend targets. The safest way to ensure dependencies are generated before build is to run 'make depend' beforehand rather than just depending on DPSRCS+SRCS. Note that the OBJS_DEPEND_GUESS mechanism (a.k.a .if !exists(.depend) then foo.o: *.h) is still useful as it improves incremental builds with missing .depend.* files and allows 'make foo.o' to usually work, while this 'beforebuild: depend' ensures that the build will always find all dependencies. The 'make foo.o' case has no means of a 'beforebuild' hook. This also removes several hacks in the DIRDEPS_BUILD: - NO_INSTALL_INCLUDES is no longer needed as it mostly was to work around .ORDER problems with building the needed headers early. - DIRDEPS_BUILD: It is no longer necesarry to track "local dependencies" in Makefile.depend. These were only in Makefile.depend for 'clean builds' since nothing would generate the files due to skipping 'make depend' and early dependency bugs that have been fixed, such as adding headers into SRCS for the OBJS_DEPEND_GUESS mechanism. Normally if a .depend file does not exist then a dependency is added by bsd.lib.mk/bsd.prog.mk from OBJS: *.h. However, meta.autodep.mk creates a .depend file from created meta files and inserts that into Makefile.depend. It also only tracks *.[ch] files though which can miss some dependencies that are hooked into 'make depend'. This .depend that is created then breaks incremental builds due to the !exists(.depend) checks for OBJS_DEPEND_GUESS. The goal was to skip 'make depend' yet it only really works the first time. After that files are not generated as expected, which r288966 tried to address but was using buildfiles: rather than beforebuild: and was reverted in r291725. As noted previously, depending only on headers in beforebuild: would create .ORDER errors in some cases. meta.autodep.mk is still used to generate Makefile.depend though via: gendirdeps: Makefile.depend .END: gendirdeps This commit allows removing all of the "local dependencies" in Makefile.depend which cuts down on churn and removes some of the arch-dependent Makefile.depend files. The "local dependencies" were also problematic for bootstrapping. Sponsored by: EMC / Isilon Storage Division
2016-02-24 17:19:18 +00:00
# Always run 'make depend' to generate dependencies early and to avoid the
# need for manually running it. For the kernel this is mostly a NOP since
# all dependencies are correctly added or accounted for. This is mostly to
# ensure downstream uses of kernel-depend are handled.
beforebuild: kernel-depend
# Guess some dependencies for when no ${DEPENDFILE}.OBJ is generated yet.
# For meta+filemon the .meta file is checked for since it is the dependency
# file used.
.for __obj in ${DEPENDOBJS:O:u}
.if (defined(_meta_filemon) && !exists(${.OBJDIR}/${__obj}.meta)) || \
(!defined(_meta_filemon) && !exists(${.OBJDIR}/.depend.${__obj}))
.if ${SYSTEM_OBJS:M${__obj}}
${__obj}: ${OBJS_DEPEND_GUESS}
.endif
${__obj}: ${OBJS_DEPEND_GUESS.${__obj}}
.elif defined(_meta_filemon)
# For meta mode we still need to know which file to depend on to avoid
# ambiguous suffix transformation rules from .PATH. Meta mode does not
# use .depend files. We really only need source files, not headers since
# they are typically in SRCS/beforebuild already. For target-specific
# guesses do include headers though since they may not be in SRCS.
.if ${SYSTEM_OBJS:M${__obj}}
${__obj}: ${OBJS_DEPEND_GUESS:N*.h}
.endif
${__obj}: ${OBJS_DEPEND_GUESS.${__obj}}
.endif
.endfor
Add a FAST_DEPEND option, off by default, which speeds up the build significantly. This speeds up buildworld by 16% on my system and buildkernel by 35%. Rather than calling mkdep(1), which is just a wrapper around 'cc -E', use the modern -MD -MT -MF flags to gather and generate dependencies during compilation. This flag was introduced in GCC "a long time ago", in GCC 3.0, and is also supported by Clang. (It appears that ICC also supports this but I do not have access to test it). This avoids running the preprocessor *twice* for every build, in both 'make depend' and 'make all'. This is especially noticeable when using ccache since it does not cache preprocessor results from mkdep(1) / 'cc -E', but still speeds up compilation with the -MD flags. For 'make depend' a tree-walk is still done to ensure that all DPSRCS are generated when expected, and that beforedepend/afterdepend and _EXTRADEPEND are all still respected. In time this may change but for now I've been conservative. The time for a tree-walk with -j combined with SUBDIR_PARALLEL is not significant. For example, it takes about 9 seconds with -j15 to walk all of src/ for 'make depend' now on my system. A .depend file is still generated with the various rules that apply to the final target, or custom rules. Otherwise there are now per-built-object-file .depend files, such as .depend.filename.o. These are included directly by make rather than populating .depend with a loop and .depend lines, which only added overhead to the now almost-NOP 'make depend' phase. Before this I experimented with having mkdep(1) called in parallel per-file. While this improved the kernel and lib/libc 'make depend' phase, it resulted in slower build times overall. The -M flags are removed from CFLAGS when linking since they have no effect. Enabling this by default, for src or out-of-src, can be done once more testing has been done, such as a ports exp-run, and with more compilers. The system I used for testing was: WITNESS Build options: -j20 WITH_LLDB=yes WITH_DEBUG_FILES=yes WITH_FAST_DEPEND=yes DISK: ZFS 3-way mirror with very slow disks using SSD l2arc/log. The arc was fully populated with src tree files. RAM: 76GiB CPU: Intel(R) Xeon(R) CPU L5520 @2.27GHz 2 package(s) x 4 core(s) x 2 SMT threads = hw.ncpu=16 buildworld: x buildworld-before + buildworld-fastdep +-------------------------------------------------------------------------------+ |+ | |+ | |+ xx x| | |_MA___|| |A | +-------------------------------------------------------------------------------+ N Min Max Median Avg Stddev x 3 3744.13 3794.31 3752.25 3763.5633 26.935139 + 3 3153.34 3155.16 3154.2 3154.2333 0.91045776 Difference at 95.0% confidence -609.33 +/- 43.1943 -16.1902% +/- 1.1477% (Student's t, pooled s = 19.0569) buildkernel: x buildkernel-before + buildkernel-fastdep +-------------------------------------------------------------------------------+ |+ x | |++ xx| | A|| |A| | +-------------------------------------------------------------------------------+ N Min Max Median Avg Stddev x 3 571.57 573.94 571.79 572.43333 1.3094401 + 3 369.12 370.57 369.3 369.66333 0.79033748 Difference at 95.0% confidence -202.77 +/- 2.45131 -35.4225% +/- 0.428227% (Student's t, pooled s = 1.0815) Sponsored by: EMC / Isilon Storage Division MFC after: 3 weeks Relnotes: yes
2015-11-06 04:45:29 +00:00
.NOPATH: .depend ${DEPENDFILES_OBJS}
.depend: .PRECIOUS ${SRCS}
_ILINKS= machine
.if ${MACHINE} != ${MACHINE_CPUARCH} && ${MACHINE} != "arm64"
_ILINKS+= ${MACHINE_CPUARCH}
.endif
.if ${MACHINE_CPUARCH} == "i386" || ${MACHINE_CPUARCH} == "amd64"
_ILINKS+= x86
.endif
# Ensure that the link exists without depending on it when it exists.
.for _link in ${_ILINKS}
.if !exists(${.OBJDIR}/${_link})
${SRCS} ${CLEAN:M*.o}: ${_link}
.endif
.endfor
${_ILINKS}:
@case ${.TARGET} in \
machine) \
path=${S}/${MACHINE}/include ;; \
*) \
path=${S}/${.TARGET}/include ;; \
esac ; \
${ECHO} ${.TARGET} "->" $$path ; \
ln -fhs $$path ${.TARGET}
# .depend needs include links so we remove them only together.
Add a FAST_DEPEND option, off by default, which speeds up the build significantly. This speeds up buildworld by 16% on my system and buildkernel by 35%. Rather than calling mkdep(1), which is just a wrapper around 'cc -E', use the modern -MD -MT -MF flags to gather and generate dependencies during compilation. This flag was introduced in GCC "a long time ago", in GCC 3.0, and is also supported by Clang. (It appears that ICC also supports this but I do not have access to test it). This avoids running the preprocessor *twice* for every build, in both 'make depend' and 'make all'. This is especially noticeable when using ccache since it does not cache preprocessor results from mkdep(1) / 'cc -E', but still speeds up compilation with the -MD flags. For 'make depend' a tree-walk is still done to ensure that all DPSRCS are generated when expected, and that beforedepend/afterdepend and _EXTRADEPEND are all still respected. In time this may change but for now I've been conservative. The time for a tree-walk with -j combined with SUBDIR_PARALLEL is not significant. For example, it takes about 9 seconds with -j15 to walk all of src/ for 'make depend' now on my system. A .depend file is still generated with the various rules that apply to the final target, or custom rules. Otherwise there are now per-built-object-file .depend files, such as .depend.filename.o. These are included directly by make rather than populating .depend with a loop and .depend lines, which only added overhead to the now almost-NOP 'make depend' phase. Before this I experimented with having mkdep(1) called in parallel per-file. While this improved the kernel and lib/libc 'make depend' phase, it resulted in slower build times overall. The -M flags are removed from CFLAGS when linking since they have no effect. Enabling this by default, for src or out-of-src, can be done once more testing has been done, such as a ports exp-run, and with more compilers. The system I used for testing was: WITNESS Build options: -j20 WITH_LLDB=yes WITH_DEBUG_FILES=yes WITH_FAST_DEPEND=yes DISK: ZFS 3-way mirror with very slow disks using SSD l2arc/log. The arc was fully populated with src tree files. RAM: 76GiB CPU: Intel(R) Xeon(R) CPU L5520 @2.27GHz 2 package(s) x 4 core(s) x 2 SMT threads = hw.ncpu=16 buildworld: x buildworld-before + buildworld-fastdep +-------------------------------------------------------------------------------+ |+ | |+ | |+ xx x| | |_MA___|| |A | +-------------------------------------------------------------------------------+ N Min Max Median Avg Stddev x 3 3744.13 3794.31 3752.25 3763.5633 26.935139 + 3 3153.34 3155.16 3154.2 3154.2333 0.91045776 Difference at 95.0% confidence -609.33 +/- 43.1943 -16.1902% +/- 1.1477% (Student's t, pooled s = 19.0569) buildkernel: x buildkernel-before + buildkernel-fastdep +-------------------------------------------------------------------------------+ |+ x | |++ xx| | A|| |A| | +-------------------------------------------------------------------------------+ N Min Max Median Avg Stddev x 3 571.57 573.94 571.79 572.43333 1.3094401 + 3 369.12 370.57 369.3 369.66333 0.79033748 Difference at 95.0% confidence -202.77 +/- 2.45131 -35.4225% +/- 0.428227% (Student's t, pooled s = 1.0815) Sponsored by: EMC / Isilon Storage Division MFC after: 3 weeks Relnotes: yes
2015-11-06 04:45:29 +00:00
kernel-cleandepend: .PHONY
rm -f ${DEPENDFILES} ${_ILINKS}
kernel-tags:
@[ -f .depend ] || { echo "you must make depend first"; exit 1; }
sh $S/conf/systags.sh
kernel-install: .PHONY
@if [ ! -f ${KERNEL_KO} ] ; then \
echo "You must build a kernel first." ; \
exit 1 ; \
fi
.if exists(${DESTDIR}${KODIR})
-thiskernel=`sysctl -n kern.bootfile` ; \
if [ ! "`dirname "$$thiskernel"`" -ef ${DESTDIR}${KODIR} ] ; then \
chflags -R noschg ${DESTDIR}${KODIR} ; \
rm -rf ${DESTDIR}${KODIR} ; \
rm -rf ${DESTDIR}${KERN_DEBUGDIR}${KODIR} ; \
else \
if [ -d ${DESTDIR}${KODIR}.old ] ; then \
chflags -R noschg ${DESTDIR}${KODIR}.old ; \
rm -rf ${DESTDIR}${KODIR}.old ; \
fi ; \
mv ${DESTDIR}${KODIR} ${DESTDIR}${KODIR}.old ; \
if [ -n "${KERN_DEBUGDIR}" -a \
-d ${DESTDIR}${KERN_DEBUGDIR}${KODIR} ]; then \
rm -rf ${DESTDIR}${KERN_DEBUGDIR}${KODIR}.old ; \
mv ${DESTDIR}${KERN_DEBUGDIR}${KODIR} ${DESTDIR}${KERN_DEBUGDIR}${KODIR}.old ; \
fi ; \
sysctl kern.bootfile=${DESTDIR}${KODIR}.old/"`basename "$$thiskernel"`" ; \
fi
.endif
mkdir -p ${DESTDIR}${KODIR}
${INSTALL} -p -m 555 -o ${KMODOWN} -g ${KMODGRP} ${KERNEL_KO} ${DESTDIR}${KODIR}/
.if defined(DEBUG) && !defined(INSTALL_NODEBUG) && ${MK_KERNEL_SYMBOLS} != "no"
mkdir -p ${DESTDIR}${KERN_DEBUGDIR}${KODIR}
${INSTALL} -p -m 555 -o ${KMODOWN} -g ${KMODGRP} ${KERNEL_KO}.debug ${DESTDIR}${KERN_DEBUGDIR}${KODIR}/
.endif
.if defined(KERNEL_EXTRA_INSTALL)
${INSTALL} -p -m 555 -o ${KMODOWN} -g ${KMODGRP} ${KERNEL_EXTRA_INSTALL} ${DESTDIR}${KODIR}/
.endif
kernel-reinstall:
@-chflags -R noschg ${DESTDIR}${KODIR}
${INSTALL} -p -m 555 -o ${KMODOWN} -g ${KMODGRP} ${KERNEL_KO} ${DESTDIR}${KODIR}/
.if defined(DEBUG) && !defined(INSTALL_NODEBUG) && ${MK_KERNEL_SYMBOLS} != "no"
${INSTALL} -p -m 555 -o ${KMODOWN} -g ${KMODGRP} ${KERNEL_KO}.debug ${DESTDIR}${KERN_DEBUGDIR}${KODIR}/
.endif
config.o env.o hints.o vers.o vnode_if.o:
${NORMAL_C}
${NORMAL_CTFCONVERT}
config.ln env.ln hints.ln vers.ln vnode_if.ln:
${NORMAL_LINT}
.if ${MK_REPRODUCIBLE_BUILD} != "no"
REPRO_FLAG="-r"
.endif
vers.c: $S/conf/newvers.sh $S/sys/param.h ${SYSTEM_DEP}
MAKE=${MAKE} sh $S/conf/newvers.sh ${REPRO_FLAG} ${KERN_IDENT}
vnode_if.c: $S/tools/vnode_if.awk $S/kern/vnode_if.src
${AWK} -f $S/tools/vnode_if.awk $S/kern/vnode_if.src -c
vnode_if.h vnode_if_newproto.h vnode_if_typedef.h: $S/tools/vnode_if.awk \
$S/kern/vnode_if.src
vnode_if.h: vnode_if_newproto.h vnode_if_typedef.h
${AWK} -f $S/tools/vnode_if.awk $S/kern/vnode_if.src -h
vnode_if_newproto.h:
${AWK} -f $S/tools/vnode_if.awk $S/kern/vnode_if.src -p
vnode_if_typedef.h:
${AWK} -f $S/tools/vnode_if.awk $S/kern/vnode_if.src -q
.if ${MFS_IMAGE:Uno} != "no"
.if empty(MD_ROOT_SIZE_CONFIGURED)
# Generate an object file from the file system image to embed in the kernel
# via linking. Make sure the contents are in the mfs section and rename the
# start/end/size variables to __start_mfs, __stop_mfs, and mfs_size,
# respectively.
embedfs_${MFS_IMAGE:T:R}.o: ${MFS_IMAGE}
${OBJCOPY} --input-target binary \
--output-target ${EMBEDFS_FORMAT.${MACHINE_ARCH}} \
--binary-architecture ${EMBEDFS_ARCH.${MACHINE_ARCH}} \
${MFS_IMAGE} ${.TARGET}
${OBJCOPY} \
--rename-section .data=mfs,contents,alloc,load,readonly,data \
--redefine-sym \
_binary_${MFS_IMAGE:C,[^[:alnum:]],_,g}_size=__mfs_root_size \
--redefine-sym \
_binary_${MFS_IMAGE:C,[^[:alnum:]],_,g}_start=mfs_root \
--redefine-sym \
_binary_${MFS_IMAGE:C,[^[:alnum:]],_,g}_end=mfs_root_end \
${.TARGET}
.endif
.endif
# XXX strictly, everything depends on Makefile because changes to ${PROF}
# only appear there, but we don't handle that.
.include "kern.mk"