Index: head/share/mk/bsd.suffixes.mk
===================================================================
--- head/share/mk/bsd.suffixes.mk	(revision 307675)
+++ head/share/mk/bsd.suffixes.mk	(revision 307676)
@@ -1,99 +1,111 @@
 # $FreeBSD$
 
 .sh:
 	cp -f ${.IMPSRC} ${.TARGET}
 	chmod a+x ${.TARGET}
 
 .c.ln:
 	${LINT} ${LINTOBJFLAGS} ${CFLAGS:M-[DIU]*} ${.IMPSRC} || \
 	    touch ${.TARGET}
 
 .cc.ln .C.ln .cpp.ln .cxx.ln:
 	${LINT} ${LINTOBJFLAGS} ${CXXFLAGS:M-[DIU]*} ${.IMPSRC} || \
 	    touch ${.TARGET}
 
 .c:
 	${CC} ${CFLAGS} ${LDFLAGS} ${.IMPSRC} ${LDLIBS} -o ${.TARGET}
 	${CTFCONVERT_CMD}
 
 .c.o:
 	${CC} ${STATIC_CFLAGS} ${CFLAGS} -c ${.IMPSRC} -o ${.TARGET}
 	${CTFCONVERT_CMD}
 
+.c.bco:
+	${CC} -emit-llvm ${IR_CFLAGS} -c ${.IMPSRC} -o ${.TARGET}
+
+.c.llo:
+	${CC} -emit-llvm ${IR_CFLAGS} -S ${.IMPSRC} -o ${.TARGET}
+
 .cc .cpp .cxx .C:
 	${CXX} ${CXXFLAGS} ${LDFLAGS} ${.IMPSRC} ${LDLIBS} -o ${.TARGET}
 
 .cc.o .cpp.o .cxx.o .C.o:
 	${CXX} ${STATIC_CXXFLAGS} ${CXXFLAGS} -c ${.IMPSRC} -o ${.TARGET}
+
+.cc.bco .cpp.bco .cxx.bco .C.bco:
+	${CXX} -emit-llvm ${IR_CXXFLAGS} -c ${.IMPSRC} -o ${.TARGET}
+
+.cc.llo .cpp.llo .cxx.llo .C.llo:
+	${CXX} -emit-llvm ${IR_CXXFLAGS} -S ${.IMPSRC} -o ${.TARGET}
 
 .m.o:
 	${OBJC} ${OBJCFLAGS} -c ${.IMPSRC} -o ${.TARGET}
 	${CTFCONVERT_CMD}
 
 .p.o:
 	${PC} ${PFLAGS} -c ${.IMPSRC} -o ${.TARGET}
 	${CTFCONVERT_CMD}
 
 .e .r .F .f:
 	${FC} ${RFLAGS} ${EFLAGS} ${FFLAGS} ${LDFLAGS} ${.IMPSRC} ${LDLIBS} \
 	    -o ${.TARGET}
 
 .e.o .r.o .F.o .f.o:
 	${FC} ${RFLAGS} ${EFLAGS} ${FFLAGS} -c ${.IMPSRC} -o ${.TARGET}
 
 .S.o:
 	${CC:N${CCACHE_BIN}} ${CFLAGS} ${ACFLAGS} -c ${.IMPSRC} -o ${.TARGET}
 	${CTFCONVERT_CMD}
 
 .asm.o:
 	${CC:N${CCACHE_BIN}} -x assembler-with-cpp ${CFLAGS} ${ACFLAGS} -c ${.IMPSRC} \
 	    -o ${.TARGET}
 	${CTFCONVERT_CMD}
 
 .s.o:
 	${AS} ${AFLAGS} -o ${.TARGET} ${.IMPSRC}
 	${CTFCONVERT_CMD}
 
 # XXX not -j safe
 .y.o:
 	${YACC} ${YFLAGS} ${.IMPSRC}
 	${CC} ${CFLAGS} -c y.tab.c -o ${.TARGET}
 	rm -f y.tab.c
 	${CTFCONVERT_CMD}
 
 .l.o:
 	${LEX} -t ${LFLAGS} ${.IMPSRC} > ${.PREFIX}.tmp.c
 	${CC} ${CFLAGS} -c ${.PREFIX}.tmp.c -o ${.TARGET}
 	rm -f ${.PREFIX}.tmp.c
 	${CTFCONVERT_CMD}
 
 # XXX not -j safe
 .y.c:
 	${YACC} ${YFLAGS} ${.IMPSRC}
 	mv y.tab.c ${.TARGET}
 
 .l.c:
 	${LEX} -t ${LFLAGS} ${.IMPSRC} > ${.TARGET}
 
 .s.out .c.out .o.out:
 	${CC} ${CFLAGS} ${LDFLAGS} ${.IMPSRC} ${LDLIBS} -o ${.TARGET}
 	${CTFCONVERT_CMD}
 
 .f.out .F.out .r.out .e.out:
 	${FC} ${EFLAGS} ${RFLAGS} ${FFLAGS} ${LDFLAGS} ${.IMPSRC} \
 	    ${LDLIBS} -o ${.TARGET}
 	rm -f ${.PREFIX}.o
 	${CTFCONVERT_CMD}
 
 # XXX not -j safe
 .y.out:
 	${YACC} ${YFLAGS} ${.IMPSRC}
 	${CC} ${CFLAGS} ${LDFLAGS} y.tab.c ${LDLIBS} -ly -o ${.TARGET}
 	rm -f y.tab.c
 	${CTFCONVERT_CMD}
 
 .l.out:
 	${LEX} -t ${LFLAGS} ${.IMPSRC} > ${.PREFIX}.tmp.c
 	${CC} ${CFLAGS} ${LDFLAGS} ${.PREFIX}.tmp.c ${LDLIBS} -ll -o ${.TARGET}
 	rm -f ${.PREFIX}.tmp.c
 	${CTFCONVERT_CMD}
Index: head/share/mk/sys.mk
===================================================================
--- head/share/mk/sys.mk	(revision 307675)
+++ head/share/mk/sys.mk	(revision 307676)
@@ -1,325 +1,327 @@
 #	from: @(#)sys.mk	8.2 (Berkeley) 3/21/94
 # $FreeBSD$
 
 unix		?=	We run FreeBSD, not UNIX.
 .FreeBSD	?=	true
 
 .if !defined(%POSIX)
 #
 # MACHINE_CPUARCH defines a collection of MACHINE_ARCH.  Machines with
 # the same MACHINE_ARCH can run each other's binaries, so it necessarily
 # has word size and endian swizzled in.  However, support files for
 # these machines often are shared amongst all combinations of size
 # and/or endian.  This is called MACHINE_CPU in NetBSD, but that's used
 # for something different in FreeBSD.
 #
 MACHINE_CPUARCH=${MACHINE_ARCH:C/mips(n32|64)?(el)?/mips/:C/arm(v6)?(eb|hf)?/arm/:C/powerpc64/powerpc/:C/riscv64/riscv/}
 .endif
 
 
 # Some options we need now
 __DEFAULT_NO_OPTIONS= \
 	DIRDEPS_BUILD \
 	DIRDEPS_CACHE
 
 __DEFAULT_DEPENDENT_OPTIONS= \
 	AUTO_OBJ/DIRDEPS_BUILD \
 	META_MODE/DIRDEPS_BUILD \
 	STAGING/DIRDEPS_BUILD \
 	SYSROOT/DIRDEPS_BUILD
 
 __ENV_ONLY_OPTIONS:= \
 	${__DEFAULT_NO_OPTIONS} \
 	${__DEFAULT_YES_OPTIONS} \
 	${__DEFAULT_DEPENDENT_OPTIONS:H}
 
 # early include for customization
 # see local.sys.mk below
 # Not included when building in fmake compatibility mode (still needed
 # for older system support)
 .if defined(.PARSEDIR)
 .sinclude <local.sys.env.mk>
 
 .include <bsd.mkopt.mk>
 
 # Disable MK_META_MODE with make -B
 .if ${MK_META_MODE} == "yes" && defined(.MAKEFLAGS) && ${.MAKEFLAGS:M-B}
 MK_META_MODE=	no
 .endif
 
 .if ${MK_DIRDEPS_BUILD} == "yes"
 .sinclude <meta.sys.mk>
 .elif ${MK_META_MODE} == "yes"
 # verbose will show .MAKE.META.PREFIX for each target.
 META_MODE+=	meta verbose
 .if !defined(NO_META_MISSING)
 META_MODE+=	missing-meta=yes
 .endif
 # silent will hide command output if a .meta file is created.
 .if !defined(NO_SILENT)
 META_MODE+=	silent=yes
 .endif
 .if !exists(/dev/filemon)
 META_MODE+= nofilemon
 .endif
 # Require filemon data with bmake
 .if empty(META_MODE:Mnofilemon)
 META_MODE+= missing-filemon=yes
 .endif
 .endif
 META_MODE?= normal
 .export META_MODE
 .MAKE.MODE?= ${META_MODE}
 .if !empty(.MAKE.MODE:Mmeta) && !defined(NO_META_IGNORE_HOST)
 # Ignore host file changes that will otherwise cause
 # buildworld -> installworld -> buildworld to rebuild everything.
 # Since the build is self-reliant and bootstraps everything it needs,
 # this should not be a real problem for incremental builds.
 # XXX: This relies on the existing host tools retaining ABI compatibility
 # through upgrades since they won't be rebuilt on header/library changes.
 # Note that these are prefix matching, so /lib matches /libexec.
 .MAKE.META.IGNORE_PATHS+= \
 	${__MAKE_SHELL} \
 	/bin \
 	/lib \
 	/rescue \
 	/sbin \
 	/usr/bin \
 	/usr/include \
 	/usr/lib \
 	/usr/sbin \
 	/usr/share \
 
 .endif
 
 
 .if ${MK_AUTO_OBJ} == "yes"
 # This needs to be done early - before .PATH is computed
 # Don't do this for 'make showconfig' as it enables all options where meta mode
 # is not expected.
 .if !make(showconfig) && !make(print-dir)
 .sinclude <auto.obj.mk>
 .endif
 .endif
 .else # bmake
 .include <bsd.mkopt.mk>
 .endif
 
 # If the special target .POSIX appears (without prerequisites or
 # commands) before the first noncomment line in the makefile, make shall
 # process the makefile as specified by the Posix 1003.2 specification.
 # make(1) sets the special macro %POSIX in this case (to the actual
 # value "1003.2", for what it's worth).
 #
 # The rules below use this macro to distinguish between Posix-compliant
 # and default behaviour.
 #
 # This functionality is currently broken, since make(1) processes sys.mk
 # before reading any other files, and consequently has no opportunity to
 # set the %POSIX macro before we read this point.
 
 .if defined(%POSIX)
 .SUFFIXES:	.o .c .y .l .a .sh .f
 .else
 .SUFFIXES:	.out .a .ln .o .c .cc .cpp .cxx .C .m .F .f .e .r .y .l .S .asm .s .cl .p .h .sh
 .endif
 
 AR		?=	ar
 .if defined(%POSIX)
 ARFLAGS		?=	-rv
 .else
 ARFLAGS		?=	-crD
 .endif
 RANLIB		?=	ranlib
 .if !defined(%POSIX)
 RANLIBFLAGS	?=	-D
 .endif
 
 AS		?=	as
 AFLAGS		?=
 ACFLAGS		?=
 
 .if defined(%POSIX)
 CC		?=	c89
 CFLAGS		?=	-O
 .else
 CC		?=	cc
 .if ${MACHINE_CPUARCH} == "arm" || ${MACHINE_CPUARCH} == "mips"
 CFLAGS		?=	-O -pipe
 .else
 CFLAGS		?=	-O2 -pipe
 .endif
 .if defined(NO_STRICT_ALIASING)
 CFLAGS		+=	-fno-strict-aliasing
 .endif
 .endif
+IR_CFLAGS	?=	${STATIC_CFLAGS:N-O*} ${CFLAGS:N-O*}
 PO_CFLAGS	?=	${CFLAGS}
 
 # cp(1) is used to copy source files to ${.OBJDIR}, make sure it can handle
 # read-only files as non-root by passing -f.
 CP		?=	cp -f
 
 CPP		?=	cpp
 
 # C Type Format data is required for DTrace
 CTFFLAGS	?=	-L VERSION
 
 CTFCONVERT	?=	ctfconvert
 CTFMERGE	?=	ctfmerge
 
 .if defined(CFLAGS) && (${CFLAGS:M-g} != "")
 CTFFLAGS	+=	-g
 .endif
 
 CXX		?=	c++
 CXXFLAGS	?=	${CFLAGS:N-std=*:N-Wnested-externs:N-W*-prototypes:N-Wno-pointer-sign:N-Wold-style-definition}
+IR_CXXFLAGS	?=	${STATIC_CXXFLAGS:N-O*} ${CXXFLAGS:N-O*}
 PO_CXXFLAGS	?=	${CXXFLAGS}
 
 DTRACE		?=	dtrace
 DTRACEFLAGS	?=	-C -x nolibs
 
 .if empty(.MAKEFLAGS:M-s)
 ECHO		?=	echo
 ECHODIR		?=	echo
 .else
 ECHO		?=	true
 .if ${.MAKEFLAGS:M-s} == "-s"
 ECHODIR		?=	echo
 .else
 ECHODIR		?=	true
 .endif
 .endif
 
 .if ${.MAKEFLAGS:M-N}
 # bmake -N is supposed to skip executing anything but it does not skip
 # exeucting '+' commands.  The '+' feature is used where .MAKE
 # is not safe for the entire target.  -N is intended to skip building sub-makes
 # so it executing '+' commands is not right.  Work around the bug by not
 # setting '+' when -N is used.
 _+_		?=
 .else
 _+_		?=	+
 .endif
 
 .if defined(%POSIX)
 FC		?=	fort77
 FFLAGS		?=	-O 1
 .else
 FC		?=	f77
 FFLAGS		?=	-O
 .endif
 EFLAGS		?=
 
 INSTALL		?=	install
 
 LEX		?=	lex
 LFLAGS		?=
 
 LD		?=	ld
 LDFLAGS		?=				# LDFLAGS is for CC, 
 _LDFLAGS	=	${LDFLAGS:S/-Wl,//g}	# strip -Wl, for LD
 
 LINT		?=	lint
 LINTFLAGS	?=	-cghapbx
 LINTKERNFLAGS	?=	${LINTFLAGS}
 LINTOBJFLAGS	?=	-cghapbxu -i
 LINTOBJKERNFLAGS?=	${LINTOBJFLAGS}
 LINTLIBFLAGS	?=	-cghapbxu -C ${LIB}
 
 MAKE		?=	make
 
 .if !defined(%POSIX)
 LORDER		?=	lorder
 
 NM		?=	nm
 NMFLAGS		?=
 
 OBJC		?=	cc
 OBJCFLAGS	?=	${OBJCINCLUDES} ${CFLAGS} -Wno-import
 
 OBJCOPY		?=	objcopy
 
 PC		?=	pc
 PFLAGS		?=
 
 RC		?=	f77
 RFLAGS		?=
 
 TSORT		?=	tsort
 TSORTFLAGS	?=	-q
 .endif
 
 SHELL		?=	sh
 
 .if !defined(%POSIX)
 SIZE		?=	size
 .endif
 
 YACC		?=	yacc
 .if defined(%POSIX)
 YFLAGS		?=
 .else
 YFLAGS		?=	-d
 .endif
 
 .if defined(%POSIX)
 
 .include "bsd.suffixes-posix.mk"
 
 .else
 
 # non-Posix rule set
 .include "bsd.suffixes.mk"
 
 # Pull in global settings.
 __MAKE_CONF?=/etc/make.conf
 .if exists(${__MAKE_CONF})
 .include "${__MAKE_CONF}"
 .endif
 
 # late include for customization
 .sinclude <local.sys.mk>
 
 .if defined(META_MODE)
 META_MODE:=	${META_MODE:O:u}
 .endif
 
 .if defined(__MAKE_SHELL) && !empty(__MAKE_SHELL)
 SHELL=	${__MAKE_SHELL}
 .SHELL: path=${__MAKE_SHELL}
 .endif
 
 # Tell bmake to expand -V VAR by default
 .MAKE.EXPAND_VARIABLES= yes
 
 # Tell bmake the makefile preference
 .MAKE.MAKEFILE_PREFERENCE= BSDmakefile makefile Makefile
 
 # Tell bmake to always pass job tokens, regardless of target depending on
 # .MAKE or looking like ${MAKE}/${.MAKE}/$(MAKE)/$(.MAKE)/make.
 .MAKE.ALWAYS_PASS_JOB_QUEUE= yes
 
 # By default bmake does *not* use set -e
 # when running target scripts, this is a problem for many makefiles here.
 # So define a shell that will do what FreeBSD expects.
 .ifndef WITHOUT_SHELL_ERRCTL
 __MAKE_SHELL?=/bin/sh
 .SHELL: name=sh \
 	quiet="set -" echo="set -v" filter="set -" \
 	hasErrCtl=yes check="set -e" ignore="set +e" \
 	echoFlag=v errFlag=e \
 	path=${__MAKE_SHELL}
 .endif
 
 # Hack for ports compatibility. Historically, ports makefiles have
 # assumed they can examine MACHINE_CPU without including anything
 # because this was automatically included in sys.mk. For /usr/src,
 # this file has moved to being included from bsd.opts.mk. Until all
 # the ports files are modernized, and a reasonable transition
 # period has passed, include it while we're in a ports tree here
 # to preserve historic behavior.
 .if exists(${.CURDIR}/../../Mk/bsd.port.mk)
 .include <bsd.cpu.mk>
 .endif
 
 .endif # ! Posix