Makefile.kern.inc revision 1.154       1 #	$NetBSD: Makefile.kern.inc,v 1.154 2012/03/25 01:56:02 uebayasi Exp $
      2 #
      3 # This file contains common `MI' targets and definitions and it is included
      4 # at the bottom of each `MD' ${MACHINE}/conf/Makefile.${MACHINE}.
      5 #
      6 # Each target in this file should be protected with `if !target(target)'
      7 # or `if !commands(target)' and each variable should only be conditionally
      8 # assigned `VAR ?= VALUE', so that everything can be overriden.
      9 #
     10 # DEBUG is set to -g if debugging.
     11 # PROF is set to -pg if profiling.
     12 #
     13 # To specify debugging, add the config line: makeoptions DEBUG="-g"
     14 # A better way is to specify -g only for a few files.
     15 #
     16 #	makeoptions DEBUGLIST="uvm* trap if_*"
     17 #
     18 # all ports are expected to include bsd.own.mk for toolchain settings
     19 
     20 ##
     21 ## (0) toolchain settings for things that aren't part of the standard
     22 ## toolchain
     23 ##
     24 HOST_SH?=	sh
     25 DBSYM?=		dbsym
     26 MKDEP?=		mkdep
     27 STRIP?=		strip
     28 OBJCOPY?=	objcopy
     29 OBJDUMP?=	objdump
     30 CSCOPE?=	cscope
     31 MKID?=		mkid
     32 UUDECODE?=	${TOOL_UUDECODE:Uuudecode}
     33 HEXDUMP?=	${TOOL_HEXDUMP:Uhexdump}
     34 GENASSYM?=	${TOOL_GENASSYM:Ugenassym}
     35 .MAKEOVERRIDES+=USETOOLS	# make sure proper value is propagated
     36 
     37 _MKMSG?=		@\#
     38 _MKSHMSG?=		echo
     39 _MKSHECHO?=		echo
     40 _MKMSG_CREATE?=		:
     41 _MKTARGET_COMPILE?=	:
     42 _MKTARGET_CREATE?=	:
     43 
     44 ##
     45 ## (1) port independent source tree identification
     46 ##
     47 # source tree is located via $S relative to the compilation directory
     48 .ifndef S
     49 S!=	cd ../../../..; pwd
     50 .endif
     51 
     52 ##
     53 ## (2) compile settings
     54 ##
     55 ## CPPFLAGS, CFLAGS, and AFLAGS must be set in the port's Makefile
     56 ##
     57 INCLUDES?=	-I. ${EXTRA_INCLUDES} -I${S}/../common/include -I$S/arch \
     58 		-I$S -nostdinc
     59 CPPFLAGS+=	${INCLUDES} ${IDENT} ${PARAM} -D_KERNEL -D_KERNEL_OPT
     60 CPPFLAGS+=	-std=gnu99
     61 DEFCOPTS?=	-O2
     62 COPTS?=		${DEFCOPTS}
     63 DBG=		# might contain unwanted -Ofoo
     64 DEFWARNINGS?=	yes
     65 .if (${DEFWARNINGS} == "yes")
     66 CWARNFLAGS+=	-Wall -Wno-main -Wno-format-zero-length -Wpointer-arith
     67 CWARNFLAGS+=	-Wmissing-prototypes -Wstrict-prototypes
     68 CWARNFLAGS+=	-Wold-style-definition
     69 CWARNFLAGS+=	-Wswitch -Wshadow
     70 CWARNFLAGS+=	-Wcast-qual -Wwrite-strings
     71 CWARNFLAGS+=	-Wno-unreachable-code
     72 . if defined(HAVE_GCC) || defined(HAVE_PCC)
     73 CWARNFLAGS+=	-Wno-pointer-sign -Wno-attributes
     74 .  if ${MACHINE} == "i386" || ${MACHINE_ARCH} == "x86_64" || \
     75 	${MACHINE_ARCH} == "sparc64" || ${MACHINE} == "prep"
     76 CWARNFLAGS+=	-Wextra -Wno-unused-parameter
     77 .  endif
     78 .  if ${MACHINE} == "i386" || ${MACHINE_ARCH} == "x86_64"
     79 CWARNFLAGS+=	-Wold-style-definition
     80 .  endif
     81 . endif
     82 # Add -Wno-sign-compare.  -Wsign-compare is included in -Wall as of GCC 3.3,
     83 # but our sources aren't up for it yet.
     84 CWARNFLAGS+=	-Wno-sign-compare
     85 .endif
     86 
     87 CWARNFLAGS.clang+=	-Wno-unknown-pragmas -Wno-conversion \
     88 			-Wno-self-assign
     89 
     90 CWARNFLAGS.ah_regdomain.c= ${${ACTIVE_CC} == "clang":? \
     91     -Wno-shift-count-negative -Wno-shift-count-overflow:}
     92 
     93 CFLAGS+=	-ffreestanding -fno-zero-initialized-in-bss
     94 CFLAGS+=	${DEBUG} ${COPTS}
     95 AFLAGS+=	-D_LOCORE -Wa,--fatal-warnings
     96 
     97 # XXX
     98 .if defined(HAVE_GCC)
     99 CFLAGS+=	-fno-strict-aliasing
    100 .endif
    101 
    102 .if ${USE_SSP:Uno} == "yes"
    103 COPTS.kern_ssp.c+=	-fno-stack-protector -D__SSP__
    104 .endif
    105 
    106 # for multi-cpu machines, cpu_hatch() straddles the init of
    107 # __stack_chk_guard, so ensure stack protection is disabled
    108 .if ${MACHINE} == "i386" || ${MACHINE_ARCH} == "x86_64"
    109 COPTS.cpu.c+=		-fno-stack-protector
    110 .endif
    111 
    112 # If we want the bpendtsleep: label in kern_synch.c, we need to use
    113 # -fno-reorder-blocks.  Don't make this a config(1) defflag without
    114 # making sure this fragment remains valid.
    115 .if defined(HAVE_GCC) && !empty(${CFLAGS:M-DKERN_SYNCH_BPENDTSLEEP_LABEL})
    116 COPTS.kern_synch.c+=	-fno-reorder-blocks
    117 .endif
    118 
    119 # Use the per-source COPTS variables to add -g to just those
    120 # files that match the shell patterns given in ${DEBUGLIST}
    121 #
    122 .for i in ${DEBUGLIST}
    123 . for j in ${CFILES:T:M$i.c}
    124 COPTS.${j}+=-g
    125 . endfor
    126 .endfor
    127 
    128 # Always compile debugsyms.c with debug information.
    129 # This allows gdb to use type informations.
    130 #
    131 COPTS.debugsyms.c+=	-g
    132 
    133 # Add CTF sections for DTrace
    134 .if defined(CTFCONVERT)
    135 COMPILE_CTFCONVERT=	${_MKSHECHO}\
    136 			${CTFCONVERT} ${CTFFLAGS} ${.TARGET} && \
    137 			${CTFCONVERT} ${CTFFLAGS} ${.TARGET}
    138 .else
    139 COMPILE_CTFCONVERT=
    140 .endif
    141 
    142 # compile rules: rules are named ${TYPE}_${SUFFIX} where TYPE is NORMAL or
    143 # NOPROF and SUFFIX is the file suffix, capitalized (e.g. C for a .c file).
    144 NORMAL_C?=	@${_MKSHMSG} "compile  ${.CURDIR:T}/${.TARGET}" && \
    145 		${_MKSHECHO}\
    146 		${CC} ${COPTS.${<:T}} ${CFLAGS} ${CPPFLAGS} ${PROF} -c $< && \
    147 		${CC} ${COPTS.${<:T}} ${CFLAGS} ${CPPFLAGS} ${PROF} -c $< && \
    148 		${COMPILE_CTFCONVERT}
    149 NOPROF_C?=	@${_MKSHMSG} "compile  ${.CURDIR:T}/${.TARGET}" && \
    150 		${_MKSHECHO}\
    151 		${CC} ${COPTS.${<:T}} ${CFLAGS} ${CPPFLAGS} -c $< && \
    152 		${CC} ${COPTS.${<:T}} ${CFLAGS} ${CPPFLAGS} -c $< && \
    153 		${COMPILE_CTFCONVERT}
    154 NORMAL_S?=	@${_MKSHMSG} "compile  ${.CURDIR:T}/${.TARGET}" && \
    155 		${_MKSHECHO}\
    156 		${CC} ${AFLAGS} ${AFLAGS.${<:T}} ${CPPFLAGS} -c $< && \
    157 		${CC} ${AFLAGS} ${AFLAGS.${<:T}} ${CPPFLAGS} -c $<
    158 
    159 ##
    160 ## (3) libkern and compat
    161 ##
    162 ## Set KERN_AS in the port Makefile to "obj" or "library".  The
    163 ## default is "library", as documented in $S/lib/libkern/Makefile.inc.
    164 ##
    165 
    166 ### find out what to use for libkern
    167 .include "$S/lib/libkern/Makefile.inc"
    168 .ifndef PROF
    169 LIBKERN?=	${KERNLIB}
    170 .else
    171 LIBKERN?=	${KERNLIB_PROF}
    172 .endif
    173 
    174 LIBKERNLN?=	${KERNLIBLN}
    175 
    176 ### find out what to use for libcompat
    177 .include "$S/compat/common/Makefile.inc"
    178 .ifndef PROF
    179 SYSLIBCOMPAT?=	${COMPATLIB}
    180 .else
    181 SYSLIBCOMPAT?=	${COMPATLIB_PROF}
    182 .endif
    183 
    184 SYSLIBCOMPATLN?=	${COMPATLIBLN}
    185 
    186 ##
    187 ## (4) local objects, compile rules, and dependencies
    188 ##
    189 ## Each port should have a corresponding section with settings for
    190 ## MD_CFILES, MD_SFILES, and MD_OBJS, along with build rules for same.
    191 ##
    192 MI_CFILES=devsw.c ioconf.c param.c
    193 # the need for a MI_SFILES variable is dubitable at best
    194 MI_OBJS=${MI_CFILES:S/.c/.o/}
    195 
    196 param.c: $S/conf/param.c
    197 	${_MKTARGET_CREATE}
    198 	rm -f param.c
    199 	cp $S/conf/param.c .
    200 
    201 param.o: Makefile
    202 
    203 .for _cfile in ${MI_CFILES}
    204 ${_cfile:T:R}.o: ${_cfile}
    205 	${NORMAL_C}
    206 .endfor
    207 
    208 ##
    209 ## (5) link settings
    210 ##
    211 ## TEXTADDR (or LOADADDRESS), LINKFORMAT, and any EXTRA_LINKFLAGS must
    212 ## be set in the port's Makefile.  The port specific definitions for
    213 ## LINKFLAGS_NORMAL and LINKFLAGS_DEBUG will added to the LINKFLAGS
    214 ## depending on the value of DEBUG.
    215 ##
    216 # load lines for config "xxx" will be emitted as:
    217 # xxx: ${SYSTEM_DEP} swapxxx.o
    218 #	${SYSTEM_LD_HEAD}
    219 #	${SYSTEM_LD} swapxxx.o
    220 #	${SYSTEM_LD_TAIL}
    221 SYSTEM_OBJ?=	${MD_OBJS} ${MI_OBJS} ${OBJS:O} ${SYSLIBCOMPAT} ${LIBKERN}
    222 SYSTEM_DEP?=	Makefile ${SYSTEM_OBJ:O} .gdbinit
    223 .if defined(KERNLDSCRIPT)
    224 SYSTEM_DEP+=	${KERNLDSCRIPT}
    225 .endif
    226 .if defined(CTFMERGE)
    227 SYSTEM_CTFMERGE= ${CTFMERGE} ${CTFFLAGS} -o ${.TARGET} ${SYSTEM_OBJ} ${EXTRA_OBJ} vers.o
    228 .else
    229 SYSTEM_CTFMERGE= ${_MKSHECHO}
    230 .endif
    231 SYSTEM_LD_HEAD?=@rm -f $@
    232 SYSTEM_LD?=	@${_MKSHMSG} "   link  ${.CURDIR:T}/${.TARGET}"; \
    233 		${_MKSHECHO}\
    234 		${LD} -Map $@.map --cref ${LINKFLAGS} -o $@ '$${SYSTEM_OBJ}' '$${EXTRA_OBJ}' vers.o; \
    235 		${LD} -Map $@.map --cref ${LINKFLAGS} -o $@ ${SYSTEM_OBJ} ${EXTRA_OBJ} vers.o
    236 
    237 AUTO_SYMTAB_SPACE?=   yes
    238 
    239 .if empty(AUTO_SYMTAB_SPACE:M[Yy][Ee][Ss]) || defined(_SYMTAB_SPACE_ADJUSTED)
    240 SYSTEM_LD_TAIL_DBSYM?=	true
    241 .else
    242 SYSTEM_LD_TAIL_DBSYM?=	\
    243 	if grep '^\#define.*SYMTAB_SPACE' opt_ksyms.h > /dev/null; then \
    244 		_modify_opt_ksyms_h () {				\
    245 			${TOOL_SED}					\
    246 	-e 's/^\(\#define.*SYMTAB_SPACE[ 	]*\)[0-9]*/\1'$$1/	\
    247 	-e 's/\(.equiv[ 	]*_KERNEL_OPT_SYMTAB_SPACE,0x\)[0-9a-f]*/\1'$$(printf %x $$1)/ \
    248 			opt_ksyms.h > opt_ksyms.h.ADJ &&		\
    249 			mv opt_ksyms.h.ADJ opt_ksyms.h &&		\
    250 			${MAKE} ${MFLAGS} _SYMTAB_SPACE_ADJUSTED=1 $@;	\
    251 		};							\
    252 		_adj_symtab_space () {				\
    253 			set -- $$(${DBSYM} -p $@); 		\
    254 			echo Symtab size: $$1, space: $$2;	\
    255 			if [ "$$1" -gt "$$2" ]; then		\
    256 				echo Adjusting symtab space;	\
    257 				rm -f $@;			\
    258 				_modify_opt_ksyms_h $$1;	\
    259 			fi;					\
    260 		};						\
    261 		_adj_symtab_space;				\
    262 	fi
    263 .endif
    264 
    265 .if defined(_SYMTAB_SPACE_ADJUSTED)
    266 SYSTEM_LD_TAIL?=true
    267 .else
    268 SYSTEM_LD_TAIL?=@${SYSTEM_LD_TAIL_DBSYM} ; \
    269 		${TOOL_SED} '/const char sccs/!d;s/.*@(.)//;s/\\.*//' vers.c; \
    270 		${SIZE} $@; chmod 755 $@; \
    271 		${SYSTEM_CTFMERGE}
    272 .endif
    273 
    274 TEXTADDR?=	${LOADADDRESS}			# backwards compatibility
    275 LINKTEXT?=	${TEXTADDR:C/.+/-Ttext &/}
    276 LINKDATA?=	${DATAADDR:C/.+/-Tdata &/}
    277 ENTRYPOINT?=	start
    278 LINKENTRY?=	${ENTRYPOINT:C/.+/-e &/}
    279 LINKFLAGS?=	${LINKFORMAT} ${LINKTEXT} ${LINKDATA} ${LINKENTRY} \
    280 		${EXTRA_LINKFLAGS}
    281 
    282 LINKFLAGS_DEBUG?=	-X
    283 SYSTEM_LD_TAIL_DEBUG?=; \
    284 		echo mv -f $@ $@.gdb; mv -f $@ $@.gdb; \
    285 		echo ${STRIP} ${STRIPFLAGS} -o $@ $@.gdb; \
    286 		${STRIP} ${STRIPFLAGS} -o $@ $@.gdb
    287 LINKFLAGS_NORMAL?=	-S
    288 STRIPFLAGS?=	-g
    289 
    290 DEBUG?=
    291 .if !empty(DEBUG:M-g*)
    292 SYSTEM_LD_TAIL+=${SYSTEM_LD_TAIL_DEBUG}
    293 LINKFLAGS+=	${LINKFLAGS_DEBUG}
    294 EXTRA_KERNELS+= ${KERNELS:@.KERNEL.@${.KERNEL.}.gdb@}
    295 CTFFLAGS+=	-g
    296 .if !defined(_SYMTAB_SPACE_ADJUSTED)
    297 SYSTEM_LD_TAIL+=; \
    298 	if grep '^\#define.*SYMTAB_SPACE' opt_ksyms.h > /dev/null; then \
    299 		echo "${DBSYM} $@.gdb"; \
    300 		${DBSYM} $@.gdb || (rm -f $@ ; exit 1) || exit 1; \
    301 	fi
    302 .endif
    303 .elifndef PROF
    304 LINKFLAGS+=	${LINKFLAGS_NORMAL}
    305 .endif
    306 
    307 .if !defined(_SYMTAB_SPACE_ADJUSTED)
    308 SYSTEM_LD_TAIL+=; \
    309 	if grep '^\#define.*SYMTAB_SPACE' opt_ksyms.h > /dev/null; then \
    310 		echo "${DBSYM} $@"; \
    311 		${DBSYM} $@ || (rm -f $@ ; exit 1) || exit 1; \
    312 	fi
    313 .endif
    314 
    315 SYSTEM_LD_HEAD+=${SYSTEM_LD_HEAD_EXTRA}
    316 SYSTEM_LD_TAIL+=${SYSTEM_LD_TAIL_EXTRA}
    317 
    318 ##
    319 ## (6) port independent targets and dependencies: assym.h, vers.o
    320 ##
    321 .if !target(assym.h)
    322 assym.h: ${GENASSYM_CONF} ${GENASSYM_EXTRAS}
    323 	${_MKTARGET_CREATE}
    324 	cat ${GENASSYM_CONF} ${GENASSYM_EXTRAS} | \
    325 	    ${GENASSYM} -- ${CC} ${CFLAGS} ${CPPFLAGS} ${PROF} \
    326 	    > assym.h.tmp && \
    327 	mv -f assym.h.tmp assym.h
    328 ${MD_SFILES:C/\.[Ss]/.o/} ${SFILES:C/\.[Ss]/.o/}: assym.h
    329 .endif
    330 
    331 MKREPRO?=no
    332 
    333 .if ${MKREPRO} == "yes"
    334 _NVFLAGS=${NVFLAGS} -r
    335 .else
    336 _NVFLAGS=${NVFLAGS}
    337 .endif
    338 
    339 .if !target(vers.o)
    340 newvers: vers.o
    341 vers.o: ${SYSTEM_DEP} ${SYSTEM_SWAP_DEP} $S/conf/newvers.sh $S/conf/osrelease.sh
    342 	${_MKMSG_CREATE} vers.c
    343 	${HOST_SH} $S/conf/newvers.sh ${_NVFLAGS}
    344 	${_MKTARGET_COMPILE}
    345 	${CC} ${CFLAGS} ${CPPFLAGS} ${PROF} -c vers.c
    346 .endif
    347 
    348 .if defined(MEMORY_DISK_IMAGE)
    349 md_root_image.h: ${MEMORY_DISK_IMAGE}
    350 	${_MKTARGET_CREATE}
    351 	${TOOL_HEXDUMP} -v -e '"\t" 8/1 "0x%02x, " "\n"' ${.ALLSRC} > ${.TARGET}
    352 
    353 # XXX This is only needed when building md_root.o
    354 CPPFLAGS+=	-DMEMORY_DISK_IMAGE
    355 md_root.o: md_root_image.h
    356 .endif
    357 
    358 # depend on MEMORY_DISK_IMAGE configuration
    359 md_root.o: Makefile
    360 
    361 # depend on root or device configuration
    362 autoconf.o conf.o: Makefile
    363 
    364 # depend on network or filesystem configuration
    365 uipc_proto.o vfs_conf.o: Makefile
    366 
    367 # depend on maxusers and CPU configuration
    368 assym.h machdep.o: Makefile
    369 
    370 ##
    371 ## (7) misc targets: install, clean(dir), depend(all), lint, links, tags,
    372 ##                   cscope, mkid
    373 ##
    374 ## Any ports that have other stuff to be cleaned up should fill in
    375 ## EXTRA_CLEAN.  Some ports may want different settings for
    376 ## KERNLINTFLAGS, MKDEP_CFLAGS, or MKDEP_AFLAGS.
    377 ##
    378 .if !target(__CLEANKERNEL)
    379 __CLEANKERNEL: .USE
    380 	${_MKMSG} "${.TARGET}ing the kernel objects"
    381 	rm -f ${KERNELS} eddep tags *.[io] *.ln [a-z]*.s vers.c \
    382 	    [Ee]rrs linterrs makelinks assym.h.tmp assym.h \
    383 	    ${EXTRA_KERNELS} ${EXTRA_CLEAN}
    384 .endif
    385 
    386 .if !target(kernelnames)
    387 kernelnames:
    388 	@echo "${KERNELS} ${EXTRA_KERNELS}"
    389 .endif
    390 
    391 .if !target(__CLEANDEPEND)
    392 __CLEANDEPEND: .USE
    393 	echo .depend ${DEPS} | xargs rm -f --
    394 .endif
    395 
    396 # do not !target these, the kern and compat Makefiles augment them
    397 cleandir distclean: __CLEANKERNEL __CLEANDEPEND
    398 clean: __CLEANKERNEL
    399 depend: .depend
    400 dependall: depend .WAIT all
    401 
    402 .if !target(.depend)
    403 MKDEP_AFLAGS?=	${AFLAGS}
    404 MKDEP_CFLAGS?=	${CFLAGS}
    405 SSRCS=${MD_SFILES} ${SFILES}
    406 CSRCS=${MD_CFILES} ${MI_CFILES} ${CFILES}
    407 SRCS=${SSRCS} ${CSRCS}
    408 DEPS=	${SRCS:T:O:u:R:S/$/.d/g}
    409 
    410 .for _s in ${SSRCS}
    411 .if !target(${_s:T:R}.d)
    412 ${_s:T:R}.d: ${_s} assym.h
    413 	${_MKTARGET_CREATE}
    414 	${MKDEP} -f ${.TARGET} -- ${MKDEP_AFLAGS} \
    415 	    ${CPPFLAGS} ${CPPFLAGS.${_s:T}} ${_s}
    416 .endif
    417 .endfor
    418 .for _s in ${CSRCS}
    419 .if !target(${_s:T:R}.d)
    420 ${_s:T:R}.d: ${_s}
    421 	${_MKTARGET_CREATE}
    422 	${MKDEP} -f ${.TARGET} -- ${MKDEP_CFLAGS} \
    423 	    ${CPPFLAGS} ${CPPFLAGS.${_s:T}} ${_s}
    424 .endif
    425 .endfor
    426 
    427 assym.d: assym.h
    428 	${_MKTARGET_CREATE}
    429 	cat ${GENASSYM_CONF} ${GENASSYM_EXTRAS} | \
    430 	    ${GENASSYM} -- ${MKDEP} -f assym.dep -- \
    431 	    ${CFLAGS} ${CPPFLAGS}
    432 	${TOOL_SED} -e 's/.*\.o:.*\.c/assym.h:/' < assym.dep >${.TARGET}
    433 	rm -f assym.dep
    434 
    435 DEPS+=	assym.d
    436 
    437 .depend: ${DEPS}
    438 	${_MKTARGET_CREATE}
    439 	echo "${.ALLSRC}" | ${MKDEP} -D
    440 .endif
    441 
    442 .if !target(lint)
    443 ALLSFILES?=	${MD_SFILES} ${SFILES}
    444 LINTSTUBS?=	${ALLSFILES:T:R:C/^.*$/LintStub_&.c/g}
    445 KERNLINTFLAGS?=	-bcehnxzFS
    446 NORMAL_LN?=	${LINT} ${KERNLINTFLAGS} ${CPPFLAGS:M-[IDU]*} -i $<
    447 
    448 _lsrc=${CFILES} ${LINTSTUBS} ${MI_CFILES} ${MD_CFILES}
    449 LOBJS?= ${_lsrc:T:S/.c$/.ln/g} ${LIBKERNLN} ${SYSLIBCOMPATLN}
    450 
    451 .for _sfile in ${ALLSFILES}
    452 LintStub_${_sfile:T:R}.c: ${_sfile} assym.h
    453 	${_MKTARGET_COMPILE}
    454 	${CC} -E -C ${AFLAGS} ${CPPFLAGS} ${_sfile} | \
    455 	      ${TOOL_AWK} -f $S/kern/genlintstub.awk >${.TARGET}
    456 .endfor
    457 
    458 .for _cfile in ${CFILES} ${LINTSTUBS} ${MI_CFILES} ${MD_CFILES}
    459 ${_cfile:T:R}.ln: ${_cfile}
    460 	${_MKTARGET_COMPILE}
    461 	${NORMAL_LN}
    462 .endfor
    463 
    464 lint: ${LOBJS}
    465 	${LINT} ${KERNLINTFLAGS} ${CPPFLAGS:M-[IDU]*} ${LOBJS}
    466 .endif
    467 
    468 # Attempt to do a syntax-only compile of the entire kernel as one entity.
    469 # Alas, bugs in the GCC C frontend prevent this from completely effective
    470 # but information can be gleaned from the output.
    471 syntax-only: ${CFILES} ${MD_CFILES}
    472 	${CC} -fsyntax-only -combine ${CFLAGS} ${CPPFLAGS} \
    473 		${CFILES} ${MD_CFILES}
    474 
    475 # List of kernel images that will be installed into the root file system.
    476 # Some platforms may need to install more than one (e.g. a netbsd.aout file
    477 # to be loaded directly by the firmware), so this can be overriden by them.
    478 KERNIMAGES?=	netbsd
    479 
    480 .if !target(install)
    481 # The install target can be redefined by putting a
    482 # install-kernel-${MACHINE_NAME} target into /etc/mk.conf
    483 MACHINE_NAME!=  uname -n
    484 install: install-kernel-${MACHINE_NAME}
    485 .if !target(install-kernel-${MACHINE_NAME})
    486 install-kernel-${MACHINE_NAME}:
    487 .for _K in ${KERNIMAGES}
    488 	rm -f ${DESTDIR}/o${_K}
    489 	ln ${DESTDIR}/${_K} ${DESTDIR}/o${_K}
    490 	cp ${_K} ${DESTDIR}/n${_K}
    491 	mv ${DESTDIR}/n${_K} ${DESTDIR}/${_K}
    492 .endfor
    493 .endif
    494 .endif
    495 
    496 .if !target(tags)
    497 tags:
    498 	@echo "see $S/kern/Makefile for tags"
    499 .endif
    500 
    501 EXTRA_CLEAN+= cscope.out cscope.tmp
    502 .if !target(cscope.out)
    503 cscope.out: Makefile depend
    504 	${_MKTARGET_CREATE}
    505 	@${TOOL_SED} 's/[^:]*://;s/^ *//;s/ *\\ *$$//;' lib/kern/.depend \
    506 	    | tr -s ' ' '\n' \
    507 	    | ${TOOL_SED} ';s|^../../||;' \
    508 	    > cscope.tmp
    509 	@${TOOL_SED} 's/[^:]*://;s/^ *//;s/ *\\ *$$//;' lib/compat/.depend \
    510 	    | tr -s ' ' '\n' \
    511 	    | ${TOOL_SED} 's|^../../||;' \
    512 	    >> cscope.tmp
    513 	@echo ${SRCS} | cat - cscope.tmp | tr -s ' ' '\n' | sort -u | \
    514 	    ${CSCOPE} -k -i - -b `echo ${INCLUDES} | ${TOOL_SED} s/-nostdinc//`
    515 #	cscope doesn't write cscope.out if it's uptodate, so ensure
    516 #	make doesn't keep calling cscope when not needed.
    517 	@rm -f cscope.tmp; touch cscope.out
    518 .endif
    519 
    520 .if !target(cscope)
    521 cscope: cscope.out
    522 	@${CSCOPE} -d
    523 .endif
    524 
    525 EXTRA_CLEAN+= ID
    526 .if !target(mkid)
    527 .PHONY: mkid
    528 mkid: ID
    529 
    530 ID: Makefile depend
    531 	${_MKTARGET_CREATE}
    532 	@${MKID} \
    533 	    `${TOOL_SED} 's/[^:]*://;s/^ *//;s/ *\\\\ *$$//;' \
    534 			lib/kern/.depend lib/compat/.depend \
    535 		    | tr ' ' '\n' \
    536 		    | ${TOOL_SED} "s|^../../||" \
    537 		    | sort -u` \
    538 	    `${TOOL_SED} 's/[^:]*://;s/^ *//;s/ *\\\\ *$$//;' \
    539 			.depend \
    540 		    | tr ' ' '\n' \
    541 		    | sort -u`
    542 
    543 .endif
    544 
    545 .include "${S}/gdbscripts/Makefile.inc"
    546 
    547 EXTRA_CLEAN+= .gdbinit
    548 .gdbinit: Makefile ${S}/gdbscripts/Makefile.inc
    549 	${_MKTARGET_CREATE}
    550 	rm -f .gdbinit
    551 .for __gdbinit in ${SYS_GDBINIT}
    552 	echo "source ${S}/gdbscripts/${__gdbinit}" >> .gdbinit
    553 .endfor
    554 .if defined(GDBINIT) && !empty(GDBINIT)
    555 .for __gdbinit in ${GDBINIT}
    556 	echo "source ${__gdbinit}" >> .gdbinit
    557 .endfor
    558 .endif
    559 
    560 # The following files use alloca(3) or variable array allocations.
    561 # Their full name is noted as documentation.
    562 VARSTACK=kern/uipc_socket.c miscfs/genfs/genfs_vnops.c \
    563     nfs/nfs_bio.c uvm/uvm_bio.c \
    564     uvm/uvm_pager.c dev/ic/aic7xxx.c dev/ic/aic79xx.c arch/xen/i386/gdt.c \
    565     dev/ofw/ofw_subr.c
    566 
    567 .if defined(HAVE_GCC) || defined(HAVE_PCC)
    568 .for __varstack in ${VARSTACK}
    569 COPTS.${__varstack:T} += -Wno-stack-protector
    570 .endfor
    571 .endif
    572 
    573 AFLAGS+=	${AOPTS.${.IMPSRC:T}}
    574 CFLAGS+=	${COPTS.${.IMPSRC:T}} ${CPUFLAGS.${.IMPSRC:T}}
    575 CPPFLAGS+=	${CPPFLAGS.${.IMPSRC:T}}
    576 CWARNFLAGS+=	${CWARNFLAGS.${.IMPSRC:T}}
    577 
    578 .include <bsd.files.mk>
    579 .include <bsd.clang-analyze.mk>
    580 
    581 ##
    582 ## the end
    583 ##
    584