The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/conf/kern.post.mk

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    1 # $FreeBSD: head/sys/conf/kern.post.mk 338598 2018-09-11 19:19:07Z emaste $
    2 
    3 # Part of a unified Makefile for building kernels.  This part includes all
    4 # the definitions that need to be after all the % directives except %RULES
    5 # and ones that act like they are part of %RULES.
    6 #
    7 # Most make variables should not be defined in this file.  Instead, they
    8 # should be defined in the kern.pre.mk so that port makefiles can
    9 # override or augment them.
   10 
   11 # In case the config had a makeoptions DESTDIR...
   12 .if defined(DESTDIR)
   13 MKMODULESENV+=  DESTDIR="${DESTDIR}"
   14 .endif
   15 SYSDIR?= ${S:C;^[^/];${.CURDIR}/&;:tA}
   16 MKMODULESENV+=  KERNBUILDDIR="${.CURDIR}" SYSDIR="${SYSDIR}"
   17 MKMODULESENV+=  MODULE_TIED=yes
   18 
   19 .if defined(CONF_CFLAGS)
   20 MKMODULESENV+=  CONF_CFLAGS="${CONF_CFLAGS}"
   21 .endif
   22 
   23 .if defined(WITH_CTF)
   24 MKMODULESENV+=  WITH_CTF="${WITH_CTF}"
   25 .endif
   26 
   27 .if defined(WITH_EXTRA_TCP_STACKS)
   28 MKMODULESENV+=  WITH_EXTRA_TCP_STACKS="${WITH_EXTRA_TCP_STACKS}"
   29 .endif
   30 
   31 # Allow overriding the kernel debug directory, so kernel and user debug may be
   32 # installed in different directories. Setting it to "" restores the historical
   33 # behavior of installing debug files in the kernel directory.
   34 KERN_DEBUGDIR?= ${DEBUGDIR}
   35 
   36 .MAIN: all
   37 
   38 .for target in all clean cleandepend cleandir clobber depend install \
   39     ${_obj} reinstall tags
   40 ${target}: kernel-${target}
   41 .if !defined(MODULES_WITH_WORLD) && !defined(NO_MODULES) && exists($S/modules)
   42 ${target}: modules-${target}
   43 modules-${target}:
   44         cd $S/modules; ${MKMODULESENV} ${MAKE} \
   45             ${target:S/^reinstall$/install/:S/^clobber$/cleandir/}
   46 .endif
   47 .endfor
   48 
   49 # Handle ports (as defined by the user) that build kernel modules
   50 .if !defined(NO_MODULES) && defined(PORTS_MODULES)
   51 #
   52 # The ports tree needs some environment variables defined to match the new kernel
   53 #
   54 # Ports search for some dependencies in PATH, so add the location of the installed files
   55 LOCALBASE?=     /usr/local
   56 # SRC_BASE is how the ports tree refers to the location of the base source files
   57 .if !defined(SRC_BASE)
   58 SRC_BASE=       ${SYSDIR:H:tA}
   59 .endif
   60 # OSVERSION is used by some ports to determine build options
   61 .if !defined(OSRELDATE)
   62 # Definition copied from src/Makefile.inc1
   63 OSRELDATE!=     awk '/^\#define[[:space:]]*__FreeBSD_version/ { print $$3 }' \
   64                     ${MAKEOBJDIRPREFIX}${SRC_BASE}/include/osreldate.h
   65 .endif
   66 # Keep the related ports builds in the obj directory so that they are only rebuilt once per kernel build
   67 WRKDIRPREFIX?=  ${.OBJDIR}
   68 PORTSMODULESENV=\
   69         env \
   70         -u CC \
   71         -u CXX \
   72         -u CPP \
   73         -u MAKESYSPATH \
   74         -u MK_AUTO_OBJ \
   75         -u MAKEOBJDIR \
   76         MAKEFLAGS="${MAKEFLAGS:M*:tW:S/^-m /-m_/g:S/ -m / -m_/g:tw:N-m_*:NMK_AUTO_OBJ=*}" \
   77         SYSDIR=${SYSDIR} \
   78         PATH=${PATH}:${LOCALBASE}/bin:${LOCALBASE}/sbin \
   79         SRC_BASE=${SRC_BASE} \
   80         OSVERSION=${OSRELDATE} \
   81         WRKDIRPREFIX=${WRKDIRPREFIX}
   82 
   83 # The WRKDIR needs to be cleaned before building, and trying to change the target
   84 # with a :C pattern below results in install -> instclean
   85 all:
   86 .for __i in ${PORTS_MODULES}
   87         @${ECHO} "===> Ports module ${__i} (all)"
   88         cd $${PORTSDIR:-/usr/ports}/${__i}; ${PORTSMODULESENV} ${MAKE} -B clean build
   89 .endfor
   90 
   91 .for __target in install reinstall clean
   92 ${__target}: ports-${__target}
   93 ports-${__target}:
   94 .for __i in ${PORTS_MODULES}
   95         @${ECHO} "===> Ports module ${__i} (${__target})"
   96         cd $${PORTSDIR:-/usr/ports}/${__i}; ${PORTSMODULESENV} ${MAKE} -B ${__target:C/(re)?install/deinstall reinstall/}
   97 .endfor
   98 .endfor
   99 .endif
  100 
  101 .ORDER: kernel-install modules-install
  102 
  103 beforebuild: .PHONY
  104 kernel-all: beforebuild .WAIT ${KERNEL_KO} ${KERNEL_EXTRA}
  105 
  106 kernel-cleandir: kernel-clean kernel-cleandepend
  107 
  108 kernel-clobber:
  109         find . -maxdepth 1 ! -type d ! -name version -delete
  110 
  111 kernel-obj:
  112 
  113 .if !defined(MODULES_WITH_WORLD) && !defined(NO_MODULES) && exists($S/modules)
  114 modules: modules-all
  115 
  116 .if !defined(NO_MODULES_OBJ)
  117 modules-all modules-depend: modules-obj
  118 .endif
  119 .endif
  120 
  121 .if !defined(DEBUG)
  122 FULLKERNEL=     ${KERNEL_KO}
  123 .else
  124 FULLKERNEL=     ${KERNEL_KO}.full
  125 ${KERNEL_KO}: ${FULLKERNEL} ${KERNEL_KO}.debug
  126         ${OBJCOPY} --strip-debug --add-gnu-debuglink=${KERNEL_KO}.debug \
  127             ${FULLKERNEL} ${.TARGET}
  128 ${KERNEL_KO}.debug: ${FULLKERNEL}
  129         ${OBJCOPY} --only-keep-debug ${FULLKERNEL} ${.TARGET}
  130 install.debug reinstall.debug: gdbinit
  131         cd ${.CURDIR}; ${MAKE} ${.TARGET:R}
  132 
  133 # Install gdbinit files for kernel debugging.
  134 gdbinit:
  135         grep -v '# XXX' ${S}/../tools/debugscripts/dot.gdbinit | \
  136             sed "s:MODPATH:${.OBJDIR}/modules:" > .gdbinit
  137         cp ${S}/../tools/debugscripts/gdbinit.kernel ${.CURDIR}
  138 .if exists(${S}/../tools/debugscripts/gdbinit.${MACHINE_CPUARCH})
  139         cp ${S}/../tools/debugscripts/gdbinit.${MACHINE_CPUARCH} \
  140             ${.CURDIR}/gdbinit.machine
  141 .endif
  142 .endif
  143 
  144 ${FULLKERNEL}: ${SYSTEM_DEP} vers.o
  145         @rm -f ${.TARGET}
  146         @echo linking ${.TARGET}
  147         ${SYSTEM_LD}
  148 .if !empty(MD_ROOT_SIZE_CONFIGURED) && defined(MFS_IMAGE)
  149         @sh ${S}/tools/embed_mfs.sh ${.TARGET} ${MFS_IMAGE}
  150 .endif
  151 .if ${MK_CTF} != "no"
  152         @echo ${CTFMERGE} ${CTFFLAGS} -o ${.TARGET} ...
  153         @${CTFMERGE} ${CTFFLAGS} -o ${.TARGET} ${SYSTEM_OBJS} vers.o
  154 .endif
  155 .if !defined(DEBUG)
  156         ${OBJCOPY} --strip-debug ${.TARGET}
  157 .endif
  158         ${SYSTEM_LD_TAIL}
  159 
  160 OBJS_DEPEND_GUESS+=     offset.inc assym.inc vnode_if.h ${BEFORE_DEPEND:M*.h} \
  161                         ${MFILES:T:S/.m$/.h/}
  162 
  163 .for mfile in ${MFILES}
  164 # XXX the low quality .m.o rules gnerated by config are normally used
  165 # instead of the .m.c rules here.
  166 ${mfile:T:S/.m$/.c/}: ${mfile}
  167         ${AWK} -f $S/tools/makeobjops.awk ${mfile} -c
  168 ${mfile:T:S/.m$/.h/}: ${mfile}
  169         ${AWK} -f $S/tools/makeobjops.awk ${mfile} -h
  170 .endfor
  171 
  172 kernel-clean:
  173         rm -f *.o *.so *.pico *.ko *.s eddep errs \
  174             ${FULLKERNEL} ${KERNEL_KO} ${KERNEL_KO}.debug \
  175             tags vers.c \
  176             vnode_if.c vnode_if.h vnode_if_newproto.h vnode_if_typedef.h \
  177             ${MFILES:T:S/.m$/.c/} ${MFILES:T:S/.m$/.h/} \
  178             ${CLEAN}
  179 
  180 # This is a hack.  BFD "optimizes" away dynamic mode if there are no
  181 # dynamic references.  We could probably do a '-Bforcedynamic' mode like
  182 # in the a.out ld.  For now, this works.
  183 HACK_EXTRA_FLAGS?= -shared
  184 hack.pico: Makefile
  185         :> hack.c
  186         ${CC} ${HACK_EXTRA_FLAGS} -nostdlib hack.c -o hack.pico
  187         rm -f hack.c
  188 
  189 offset.inc: $S/kern/genoffset.sh genoffset.o
  190         NM='${NM}' NMFLAGS='${NMFLAGS}' sh $S/kern/genoffset.sh genoffset.o > ${.TARGET}
  191 
  192 genoffset.o: $S/kern/genoffset.c
  193         ${CC} -c ${CFLAGS:N-flto:N-fno-common} $S/kern/genoffset.c
  194 
  195 # genoffset_test.o is not actually used for anything - the point of compiling it
  196 # is to exercise the CTASSERT that checks that the offsets in the offset.inc
  197 # _lite struct(s) match those in the original(s). 
  198 genoffset_test.o: $S/kern/genoffset.c offset.inc
  199         ${CC} -c ${CFLAGS:N-flto:N-fno-common} -DOFFSET_TEST \
  200             $S/kern/genoffset.c -o ${.TARGET}
  201 
  202 assym.inc: $S/kern/genassym.sh genassym.o genoffset_test.o
  203         NM='${NM}' NMFLAGS='${NMFLAGS}' sh $S/kern/genassym.sh genassym.o > ${.TARGET}
  204 
  205 genassym.o: $S/$M/$M/genassym.c  offset.inc
  206         ${CC} -c ${CFLAGS:N-flto:N-fno-common} $S/$M/$M/genassym.c
  207 
  208 OBJS_DEPEND_GUESS+= opt_global.h
  209 genoffset.o genassym.o vers.o: opt_global.h
  210 
  211 .if !empty(.MAKE.MODE:Unormal:Mmeta) && empty(.MAKE.MODE:Unormal:Mnofilemon)
  212 _meta_filemon=  1
  213 .endif
  214 # Skip reading .depend when not needed to speed up tree-walks and simple
  215 # lookups.  For install, only do this if no other targets are specified.
  216 # Also skip generating or including .depend.* files if in meta+filemon mode
  217 # since it will track dependencies itself.  OBJS_DEPEND_GUESS is still used
  218 # for _meta_filemon but not for _SKIP_DEPEND.
  219 .if !defined(NO_SKIP_DEPEND) && \
  220     ((!empty(.MAKEFLAGS:M-V) && empty(.MAKEFLAGS:M*DEP*)) || \
  221     ${.TARGETS:M*obj} == ${.TARGETS} || \
  222     ${.TARGETS:M*clean*} == ${.TARGETS} || \
  223     ${.TARGETS:M*install*} == ${.TARGETS})
  224 _SKIP_DEPEND=   1
  225 .endif
  226 .if defined(_SKIP_DEPEND) || defined(_meta_filemon)
  227 .MAKE.DEPENDFILE=       /dev/null
  228 .endif
  229 
  230 kernel-depend: .depend
  231 SRCS=   assym.inc offset.inc vnode_if.h ${BEFORE_DEPEND} ${CFILES} \
  232         ${SYSTEM_CFILES} ${GEN_CFILES} ${SFILES} \
  233         ${MFILES:T:S/.m$/.h/}
  234 DEPENDOBJS+=    ${SYSTEM_OBJS} genassym.o genoffset.o genoffset_test.o
  235 DEPENDOBJS+=    ${CLEAN:M*.o}
  236 DEPENDFILES=    ${DEPENDOBJS:O:u:C/^/.depend./}
  237 .if ${MAKE_VERSION} < 20160220
  238 DEPEND_MP?=     -MP
  239 .endif
  240 .if defined(_SKIP_DEPEND)
  241 # Don't bother reading any .meta files
  242 ${DEPENDOBJS}:  .NOMETA
  243 .depend:        .NOMETA
  244 # Unset these to avoid looping/statting on them later.
  245 .undef DEPENDOBJS
  246 .undef DEPENDFILES
  247 .endif  # defined(_SKIP_DEPEND)
  248 DEPEND_CFLAGS+= -MD ${DEPEND_MP} -MF.depend.${.TARGET}
  249 DEPEND_CFLAGS+= -MT${.TARGET}
  250 .if !defined(_meta_filemon)
  251 .if !empty(DEPEND_CFLAGS)
  252 # Only add in DEPEND_CFLAGS for CFLAGS on files we expect from DEPENDOBJS
  253 # as those are the only ones we will include.
  254 DEPEND_CFLAGS_CONDITION= "${DEPENDOBJS:M${.TARGET}}" != ""
  255 CFLAGS+=        ${${DEPEND_CFLAGS_CONDITION}:?${DEPEND_CFLAGS}:}
  256 .endif
  257 .for __depend_obj in ${DEPENDFILES}
  258 .if ${MAKE_VERSION} < 20160220
  259 .sinclude "${.OBJDIR}/${__depend_obj}"
  260 .else
  261 .dinclude "${.OBJDIR}/${__depend_obj}"
  262 .endif
  263 .endfor
  264 .endif  # !defined(_meta_filemon)
  265 
  266 # Always run 'make depend' to generate dependencies early and to avoid the
  267 # need for manually running it.  For the kernel this is mostly a NOP since
  268 # all dependencies are correctly added or accounted for.  This is mostly to
  269 # ensure downstream uses of kernel-depend are handled.
  270 beforebuild: kernel-depend
  271 
  272 # Guess some dependencies for when no ${DEPENDFILE}.OBJ is generated yet.
  273 # For meta+filemon the .meta file is checked for since it is the dependency
  274 # file used.
  275 .for __obj in ${DEPENDOBJS:O:u}
  276 .if defined(_meta_filemon)
  277 _depfile=       ${.OBJDIR}/${__obj}.meta
  278 .else
  279 _depfile=       ${.OBJDIR}/.depend.${__obj}
  280 .endif
  281 .if !exists(${_depfile})
  282 .if ${SYSTEM_OBJS:M${__obj}}
  283 ${__obj}: ${OBJS_DEPEND_GUESS}
  284 .endif
  285 ${__obj}: ${OBJS_DEPEND_GUESS.${__obj}}
  286 .elif defined(_meta_filemon)
  287 # For meta mode we still need to know which file to depend on to avoid
  288 # ambiguous suffix transformation rules from .PATH.  Meta mode does not
  289 # use .depend files.  We really only need source files, not headers since
  290 # they are typically in SRCS/beforebuild already.  For target-specific
  291 # guesses do include headers though since they may not be in SRCS.
  292 .if ${SYSTEM_OBJS:M${__obj}}
  293 ${__obj}: ${OBJS_DEPEND_GUESS:N*.h}
  294 .endif
  295 ${__obj}: ${OBJS_DEPEND_GUESS.${__obj}}
  296 .endif  # !exists(${_depfile})
  297 .endfor
  298 
  299 .NOPATH: .depend ${DEPENDFILES}
  300 
  301 .depend: .PRECIOUS ${SRCS}
  302 
  303 _ILINKS= machine
  304 .if ${MACHINE} != ${MACHINE_CPUARCH} && ${MACHINE} != "arm64"
  305 _ILINKS+= ${MACHINE_CPUARCH}
  306 .endif
  307 .if ${MACHINE_CPUARCH} == "i386" || ${MACHINE_CPUARCH} == "amd64"
  308 _ILINKS+= x86
  309 .endif
  310 
  311 # Ensure that the link exists without depending on it when it exists.
  312 .for _link in ${_ILINKS}
  313 .if !exists(${.OBJDIR}/${_link})
  314 ${SRCS} ${CLEAN:M*.o}: ${_link}
  315 .endif
  316 .endfor
  317 
  318 ${_ILINKS}:
  319         @case ${.TARGET} in \
  320         machine) \
  321                 path=${S}/${MACHINE}/include ;; \
  322         *) \
  323                 path=${S}/${.TARGET}/include ;; \
  324         esac ; \
  325         ${ECHO} ${.TARGET} "->" $$path ; \
  326         ln -fns $$path ${.TARGET}
  327 
  328 # .depend needs include links so we remove them only together.
  329 kernel-cleandepend: .PHONY
  330         rm -f .depend .depend.* ${_ILINKS}
  331 
  332 kernel-tags:
  333         @[ -f .depend ] || { echo "you must make depend first"; exit 1; }
  334         sh $S/conf/systags.sh
  335 
  336 kernel-install: .PHONY
  337         @if [ ! -f ${KERNEL_KO} ] ; then \
  338                 echo "You must build a kernel first." ; \
  339                 exit 1 ; \
  340         fi
  341 .if exists(${DESTDIR}${KODIR})
  342         -thiskernel=`sysctl -n kern.bootfile` ; \
  343         if [ ! "`dirname "$$thiskernel"`" -ef ${DESTDIR}${KODIR} ] ; then \
  344                 chflags -R noschg ${DESTDIR}${KODIR} ; \
  345                 rm -rf ${DESTDIR}${KODIR} ; \
  346                 rm -rf ${DESTDIR}${KERN_DEBUGDIR}${KODIR} ; \
  347         else \
  348                 if [ -d ${DESTDIR}${KODIR}.old ] ; then \
  349                         chflags -R noschg ${DESTDIR}${KODIR}.old ; \
  350                         rm -rf ${DESTDIR}${KODIR}.old ; \
  351                 fi ; \
  352                 mv ${DESTDIR}${KODIR} ${DESTDIR}${KODIR}.old ; \
  353                 if [ -n "${KERN_DEBUGDIR}" -a \
  354                      -d ${DESTDIR}${KERN_DEBUGDIR}${KODIR} ]; then \
  355                         rm -rf ${DESTDIR}${KERN_DEBUGDIR}${KODIR}.old ; \
  356                         mv ${DESTDIR}${KERN_DEBUGDIR}${KODIR} ${DESTDIR}${KERN_DEBUGDIR}${KODIR}.old ; \
  357                 fi ; \
  358                 sysctl kern.bootfile=${DESTDIR}${KODIR}.old/"`basename "$$thiskernel"`" ; \
  359         fi
  360 .endif
  361         mkdir -p ${DESTDIR}${KODIR}
  362         ${INSTALL} -p -m 555 -o ${KMODOWN} -g ${KMODGRP} ${KERNEL_KO} ${DESTDIR}${KODIR}/
  363 .if defined(DEBUG) && !defined(INSTALL_NODEBUG) && ${MK_KERNEL_SYMBOLS} != "no"
  364         mkdir -p ${DESTDIR}${KERN_DEBUGDIR}${KODIR}
  365         ${INSTALL} -p -m 555 -o ${KMODOWN} -g ${KMODGRP} ${KERNEL_KO}.debug ${DESTDIR}${KERN_DEBUGDIR}${KODIR}/
  366 .endif
  367 .if defined(KERNEL_EXTRA_INSTALL)
  368         ${INSTALL} -p -m 555 -o ${KMODOWN} -g ${KMODGRP} ${KERNEL_EXTRA_INSTALL} ${DESTDIR}${KODIR}/
  369 .endif
  370 
  371 
  372 
  373 kernel-reinstall:
  374         @-chflags -R noschg ${DESTDIR}${KODIR}
  375         ${INSTALL} -p -m 555 -o ${KMODOWN} -g ${KMODGRP} ${KERNEL_KO} ${DESTDIR}${KODIR}/
  376 .if defined(DEBUG) && !defined(INSTALL_NODEBUG) && ${MK_KERNEL_SYMBOLS} != "no"
  377         ${INSTALL} -p -m 555 -o ${KMODOWN} -g ${KMODGRP} ${KERNEL_KO}.debug ${DESTDIR}${KERN_DEBUGDIR}${KODIR}/
  378 .endif
  379 
  380 config.o env.o hints.o vers.o vnode_if.o:
  381         ${NORMAL_C}
  382         ${NORMAL_CTFCONVERT}
  383 
  384 .if ${MK_REPRODUCIBLE_BUILD} != "no"
  385 REPRO_FLAG="-R"
  386 .endif
  387 vers.c: $S/conf/newvers.sh $S/sys/param.h ${SYSTEM_DEP}
  388         MAKE="${MAKE}" sh $S/conf/newvers.sh ${REPRO_FLAG} ${KERN_IDENT}
  389 
  390 vnode_if.c: $S/tools/vnode_if.awk $S/kern/vnode_if.src
  391         ${AWK} -f $S/tools/vnode_if.awk $S/kern/vnode_if.src -c
  392 
  393 vnode_if.h vnode_if_newproto.h vnode_if_typedef.h: $S/tools/vnode_if.awk \
  394     $S/kern/vnode_if.src
  395 vnode_if.h: vnode_if_newproto.h vnode_if_typedef.h
  396         ${AWK} -f $S/tools/vnode_if.awk $S/kern/vnode_if.src -h
  397 vnode_if_newproto.h:
  398         ${AWK} -f $S/tools/vnode_if.awk $S/kern/vnode_if.src -p
  399 vnode_if_typedef.h:
  400         ${AWK} -f $S/tools/vnode_if.awk $S/kern/vnode_if.src -q
  401 
  402 .if ${MFS_IMAGE:Uno} != "no"
  403 .if empty(MD_ROOT_SIZE_CONFIGURED)
  404 # Generate an object file from the file system image to embed in the kernel
  405 # via linking. Make sure the contents are in the mfs section and rename the
  406 # start/end/size variables to __start_mfs, __stop_mfs, and mfs_size,
  407 # respectively.
  408 embedfs_${MFS_IMAGE:T:R}.o: ${MFS_IMAGE}
  409         ${OBJCOPY} --input-target binary \
  410             --output-target ${EMBEDFS_FORMAT.${MACHINE_ARCH}} \
  411             --binary-architecture ${EMBEDFS_ARCH.${MACHINE_ARCH}} \
  412             ${MFS_IMAGE} ${.TARGET}
  413         ${OBJCOPY} \
  414             --rename-section .data=mfs,contents,alloc,load,readonly,data \
  415             --redefine-sym \
  416                 _binary_${MFS_IMAGE:C,[^[:alnum:]],_,g}_size=__mfs_root_size \
  417             --redefine-sym \
  418                 _binary_${MFS_IMAGE:C,[^[:alnum:]],_,g}_start=mfs_root \
  419             --redefine-sym \
  420                 _binary_${MFS_IMAGE:C,[^[:alnum:]],_,g}_end=mfs_root_end \
  421             ${.TARGET}
  422 .endif
  423 .endif
  424 
  425 # XXX strictly, everything depends on Makefile because changes to ${PROF}
  426 # only appear there, but we don't handle that.
  427 
  428 .include "kern.mk"

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