#	$OpenBSD: Makefile.amd64,v 1.65 2015/01/13 01:12:49 deraadt Exp $

# For instructions on building kernels consult the config(8) and options(4)
# manual pages.
#
# N.B.: NO DEPENDENCIES ON FOLLOWING FLAGS ARE VISIBLE TO MAKEFILE
#	IF YOU CHANGE THE DEFINITION OF ANY OF THESE RECOMPILE EVERYTHING
# DEBUG is set to -g by config if debugging is requested (config -g).
# PROF is set to -pg by config if profiling is requested (config -p).

.include <bsd.own.mk>

SIZE?=	size
STRIP?=	strip

# source tree is located via $S relative to the compilation directory
.ifndef S
S!=	cd ../../../..; pwd
.endif

_machdir?=	$S/arch/${_mach}
_archdir?=	$S/arch/${_arch}

INCLUDES=	-nostdinc -I$S -I. -I$S/arch
CPPFLAGS=	${INCLUDES} ${IDENT} ${PARAM} -D_KERNEL -MD -MP
CWARNFLAGS=	-Werror -Wall -Wimplicit-function-declaration \
		-Wno-main -Wno-uninitialized \
		-Wframe-larger-than=2047

CMACHFLAGS=	-mcmodel=kernel -mno-red-zone -mno-sse2 -mno-sse -mno-3dnow \
		-mno-mmx -msoft-float -fno-omit-frame-pointer
CMACHFLAGS+=	-fno-builtin-printf -fno-builtin-snprintf \
		-fno-builtin-vsnprintf -fno-builtin-log \
		-fno-builtin-log2 -fno-builtin-malloc ${NOPIE_FLAGS}
.if ${IDENT:M-DNO_PROPOLICE}
CMACHFLAGS+=	-fno-stack-protector
.endif
.if ${IDENT:M-DSMALL_KERNEL}
CMACHFLAGS+=	-Wa,-n
.endif

COPTS?=		-O2
CFLAGS=		${DEBUG} ${CWARNFLAGS} ${CMACHFLAGS} ${COPTS} ${PIPE}
AFLAGS=		-D_LOCORE -x assembler-with-cpp ${CWARNFLAGS} ${CMACHFLAGS}
LDSCRIPT=	${_machdir}/conf/ld.script
LINKFLAGS=	-T ${LDSCRIPT} -X --warn-common -nopie

.if ${IDENT:M-DDDB_STRUCT}
DB_STRUCTINFO=	db_structinfo.h
.else
DB_STRUCTINFO=
.endif

HOSTCC?=	${CC}
HOSTED_CPPFLAGS=${CPPFLAGS:S/^-nostdinc$//}
HOSTED_CFLAGS=	${CFLAGS}
HOSTED_C=	${HOSTCC} ${HOSTED_CFLAGS} ${HOSTED_CPPFLAGS} -c $<

NORMAL_C_NOP=	${CC} ${CFLAGS} ${CPPFLAGS} -c $<
NORMAL_C=	${CC} ${CFLAGS} ${CPPFLAGS} ${PROF} -c $<
NORMAL_S=	${CC} ${AFLAGS} ${CPPFLAGS} -c $<

%OBJS

%CFILES

%SFILES

# load lines for config "xxx" will be emitted as:
# xxx: ${SYSTEM_DEP} swapxxx.o
#	${SYSTEM_LD_HEAD}
#	${SYSTEM_LD} swapxxx.o
#	${SYSTEM_LD_TAIL}
SYSTEM_HEAD=	locore.o param.o ioconf.o
SYSTEM_OBJ=	${SYSTEM_HEAD} ${OBJS}
SYSTEM_DEP=	Makefile ${SYSTEM_OBJ} ${LDSCRIPT}
SYSTEM_LD_HEAD=	@rm -f $@
SYSTEM_LD=	@echo ${LD} ${LINKFLAGS} -o $@ '$${SYSTEM_HEAD} vers.o $${OBJS}'; \
		${LD} ${LINKFLAGS} -o $@ ${SYSTEM_HEAD} vers.o ${OBJS}
SYSTEM_LD_TAIL=	@${SIZE} $@; chmod 755 $@

DEBUG?=
.if ${DEBUG} == "-g"
STRIPFLAGS=	-g -x
SYSTEM_LD_TAIL+=; \
		echo mv $@ $@.gdb; rm -f $@.gdb; mv $@ $@.gdb; \
		echo ${STRIP} ${STRIPFLAGS} -o $@ $@.gdb; \
		${STRIP} ${STRIPFLAGS} -o $@ $@.gdb
.else
LINKFLAGS+=	-S -x
.endif

%LOAD

# cc's -MD puts the source and output paths in the dependency file;
# since those are temp files here we need to fix it up.  It also
# puts the file in /tmp, so we use -MF to put it in the current
# directory as assym.P and then generate assym.d from it with a
# good target name
assym.h: $S/kern/genassym.sh Makefile \
	 ${_archdir}/${_arch}/genassym.cf ${_machdir}/${_mach}/genassym.cf
	cat ${_archdir}/${_arch}/genassym.cf ${_machdir}/${_mach}/genassym.cf | \
	    sh $S/kern/genassym.sh ${CC} ${CFLAGS} ${CPPFLAGS} -MF assym.P > assym.h.tmp
	sed '1s/.*/assym.h: \\/' assym.P > assym.d
	sort -u assym.h.tmp > assym.h

param.c: $S/conf/param.c
	rm -f param.c
	cp $S/conf/param.c .

param.o: param.c Makefile
	${NORMAL_C}

mcount.o: $S/lib/libkern/mcount.c Makefile
	${NORMAL_C_NOP}

ioconf.o: ioconf.c
	${NORMAL_C}

vers.o: ${SYSTEM_DEP} ${SYSTEM_SWAP_DEP}
	sh $S/conf/newvers.sh
	${CC} ${CFLAGS} ${CPPFLAGS} ${PROF} -c vers.c

clean::
	rm -f eddep *bsd *bsd.gdb tags *.[dio] [a-z]*.s \
	    [Ee]rrs linterrs assym.h ${DB_STRUCTINFO}

lint:
	@lint -hbxncez -Dvolatile= ${CPPFLAGS} -UKGDB \
	    ${CFILES} ioconf.c param.c | \
	    grep -v 'static function .* unused'

depend:
	@touch $@

tags:
	@echo "see $S/kern/Makefile for tags"

db_structinfo.h: $S/ddb/db_structinfo.c $S/ddb/parse_structinfo.pl
	${CC} ${CFLAGS} ${CPPFLAGS} -MT $@ -gstabs -c $S/ddb/db_structinfo.c
	objdump -g db_structinfo.o | perl $S/ddb/parse_structinfo.pl > $@
	rm -f db_structinfo.o

locore.o: ${_machdir}/${_mach}/locore.S assym.h
mutex.o vector.o copy.o spl.o mptramp.o acpi_wakecode.o: assym.h

# The install target can be redefined by putting a
# install-kernel-${MACHINE_NAME} target into /etc/mk.conf
MACHINE_NAME!=  uname -n
install: install-kernel-${MACHINE_NAME}
.if !target(install-kernel-${MACHINE_NAME}})
install-kernel-${MACHINE_NAME}:
	cmp -s bsd /bsd || ln -f /bsd /obsd
	cp bsd /nbsd
	mv /nbsd /bsd
.endif

# pull in the dependency information
.if !empty(DB_STRUCTINFO) && !exists(${DB_STRUCTINFO})
 ${SYSTEM_OBJ}: ${DB_STRUCTINFO}
.endif
.ifnmake clean
. for o in ${SYSTEM_OBJ} assym.h ${DB_STRUCTINFO}
.  if exists(${o:R}.d)
.   include "${o:R}.d"
.  elif exists($o)
    .PHONY: $o
.  endif
. endfor
.endif

%RULES