rule MultiBootSubDirSetup bootTargets
{
	local result ;
	local bootTarget ;
	bootTargets ?= $(HAIKU_BOOT_TARGETS) ;
	for bootTarget in $(bootTargets) {
		local bootTargetObject = $(bootTarget:G=<boot-target-object>) ;
		result += $(bootTargetObject) ;

		TARGET_BOOT_PLATFORM on $(bootTargetObject) = $(bootTarget) ;

		SOURCE_GRIST on $(bootTargetObject)
			= $(SOURCE_GRIST:E=)!$(bootTarget) ;

		HDRGRIST on $(bootTargetObject)
			= $(HDRGRIST:E=)!$(bootTarget) ;

		local var ;
		for var in TARGET_ARCH {
			$(var) on $(architectureObject) = $($(var)_$(architecture)) ;
		}

		# Clone the current config variable values and the variables SubDir
		# resets.
		for var in $(AUTO_SET_UP_CONFIG_VARIABLES) SUBDIR$(SUBDIRRESET) {
			$(var) on $(architectureObject) = $($(var)) ;
		}

		local hostTarget = HOST TARGET ;
		local objectDirVars =
			COMMON_ARCH COMMON_DEBUG DEBUG_$(HAIKU_DEBUG_LEVELS)
			;
		objectDirVars =
			COMMON_PLATFORM_LOCATE_TARGET
			$(hostTarget)_$(objectDirVars)_LOCATE_TARGET
			LOCATE_TARGET
			LOCATE_SOURCE
			SEARCH_SOURCE
			;

		for var in $(objectDirVars) {
			$(var) on $(bootTargetObject) = ;
		}

		on $(bootTargetObject) {
			SetupObjectsDir ;
			SetupFeatureObjectsDir $(bootTarget) ;

			for var in $(objectDirVars) {
				$(var) on $(bootTargetObject) = $($(var)) ;
			}
		}
	}

	return $(result) ;
}

rule MultiBootGristFiles files
{
	return $(files:G=$(TARGET_BOOT_PLATFORM)) ;
}

rule SetupBoot
{
	# Usage SetupBoot <sources_or_objects> : <extra_cc_flags> : <include_private_headers> ;
	#
	# <sources_or_objects> - Ideally sources, otherwise HDRSEARCH can not be
	#						 set for the sources and the sources some header
	#						 dependencies might be missing.

	local sources = [ FGristFiles $(1) ] ;
	local objects = $(sources:S=$(SUFOBJ)) ;

	# add private kernel headers
	if $(3) != false {
		SourceSysHdrs $(sources) : $(TARGET_PRIVATE_KERNEL_HEADERS) ;
	}

	if $(HAIKU_BOOT_C++_HEADERS_DIR_$(TARGET_PACKAGING_ARCH)) {
		SourceSysHdrs $(sources) :
			$(HAIKU_BOOT_C++_HEADERS_DIR_$(TARGET_PACKAGING_ARCH)) ;
	}

	# MultiBootSubDirSetup sets the target boot platform on the target object,
	# so this will be correct here in SetupBoot.
	# This does mean, however, that MultiBootSubDirSetup needs to be used in
	# all Jamfiles for things to work correctly.
	# Also means ArchitectureRules need to use platform specific variables,
	# rather than the previously generic TARGET_BOOT_CCFLAGS and friends.
	local platform = $(TARGET_BOOT_PLATFORM:U) ;
	local object ;
	for object in $(objects) {
		# add boot flags for the object
		ObjectCcFlags $(object) : $(HAIKU_BOOT_CCFLAGS) $(HAIKU_BOOT_$(platform)_CCFLAGS) $(2) ;
		ObjectC++Flags $(object) : $(HAIKU_BOOT_C++FLAGS) $(HAIKU_BOOT_$(platform)_C++FLAGS) $(2) ;
		ObjectDefines $(object) : $(TARGET_KERNEL_DEFINES) ;
		ASFLAGS on $(object) = $(HAIKU_BOOT_CCFLAGS) $(HAIKU_BOOT_$(platform)_CCFLAGS) ;

		# override regular CCFLAGS/C++FLAGS, as we don't want them
		TARGET_CCFLAGS_$(TARGET_PACKAGING_ARCH) on $(object) = ;
		TARGET_C++FLAGS_$(TARGET_PACKAGING_ARCH) on $(object) = ;

		# override warning flags
		TARGET_WARNING_CCFLAGS_$(TARGET_PACKAGING_ARCH) on $(object)
			= $(TARGET_KERNEL_WARNING_CCFLAGS) ;
		TARGET_WARNING_C++FLAGS_$(TARGET_PACKAGING_ARCH) on $(object)
			= $(TARGET_KERNEL_WARNING_C++FLAGS) ;
	 }
}

rule BootObjects
{
	SetupBoot $(1) : $(2) ;
	Objects $(1) ;
}

rule BootLd
{
	# BootLd <name> : <objs> : <linkerscript> : <args> ;

	LINK on $(1) = $(TARGET_LD_$(TARGET_PACKAGING_ARCH)) ;

	LINKFLAGS on $(1) = $(HAIKU_BOOT_$(TARGET_BOOT_PLATFORM:U)_LDFLAGS) $(4) ;
	if $(3) { LINKFLAGS on $(1) += --script=$(3) ; }

	# Remove any preset LINKLIBS, but link against libgcc.a. Linking against
	# libsupc++ is opt-out.
	if $(TARGET_BOOT_PLATFORM) != efi {
		local libs ;
		if ! [ on $(1) return $(HAIKU_NO_LIBSUPC++) ] {
			libs += [ TargetBootLibsupc++ true ] ;
			Depends $(1) : [ TargetBootLibsupc++ ] ;
		}
		LINKLIBS on $(1) = $(libs) [ TargetBootLibgcc true ] ;
		Depends $(1) : [ TargetBootLibgcc ] ;
	}

	# TODO: Do we really want to invoke SetupBoot here? The objects should
	# have been compiled with BootObjects anyway, so we're doing that twice.
	SetupBoot $(2) ;

	# Show that we depend on the libraries we need
	LocalClean clean : $(1) ;
	LocalDepends all : $(1) ;
	Depends $(1) : $(2) ;

	MakeLocateDebug $(1) ;

	on $(1) XRes $(1) : $(RESFILES) ;
	if ! [ on $(1) return $(DONT_USE_BEOS_RULES) ] {
		SetType $(1) ;
		MimeSet $(1) ;
		SetVersion $(1) ;
	}
}

actions BootLd bind VERSION_SCRIPT
{
	$(LINK) $(LINKFLAGS) -o "$(1)" "$(2)" $(LINKLIBS) \
		--version-script=$(VERSION_SCRIPT)
}

rule BootMergeObject
{
	# BootMergeObject <name> : <sources> : <extra CFLAGS> : <other objects> ;
	# Compiles source files and merges the object files to an object file.
	# <name>: Name of the object file to create. No grist will be added.
	# <sources>: Sources to be compiled. Grist will be added.
	# <extra CFLAGS>: Additional flags for compilation.
	# <other objects>: Object files or static libraries to be merged. No grist
	#				   will be added.
	#

	SetupBoot $(2) : $(3) ;
	Objects $(2) ;
	MergeObjectFromObjects $(1) : $(2:S=$(SUFOBJ)) : $(4) ;
	LINKFLAGS on $(1) += $(HAIKU_BOOT_$(TARGET_BOOT_PLATFORM:U)_LDFLAGS) ;
}

rule BootStaticLibrary
{
	# Usage BootStaticLibrary <name> : <sources> : <extra cc flags> ;
	# This is designed to take a set of sources and libraries and create
	# a file called lib<name>.a

	SetupBoot $(2) : $(3) : false ;
	Library $(1) : $(2) ;
}

rule BootStaticLibraryObjects
{
	# Usage BootStaticLibrary <name> : <sources> ;
	# This is designed to take a set of sources and libraries and create
	# a file called <name>

	# Show that we depend on the libraries we need
	SetupBoot $(2) ;
	LocalClean clean : $(1) ;
	LocalDepends all : $(1) ;
	Depends $(1) : $(2) ;

	MakeLocateDebug $(1) ;
}

actions BootStaticLibraryObjects
{
	# Force recreation of the archive to avoid build errors caused by
	# stale dependencies after renaming or deleting object files.
	$(RM) "$(1)"
	$(HAIKU_AR_$(TARGET_PACKAGING_ARCH)) -r "$(1)" "$(2)" ;
}

rule BuildMBR binary : source
{
	SEARCH on $(source) = $(SUBDIR) ;
	MakeLocateDebug $(binary) ;
	Depends $(binary) : $(source) ;
}

actions BuildMBR
{
	$(RM) $(1)
	$(HAIKU_CC_$(HAIKU_PACKAGING_ARCH)) $(HAIKU_LINKFLAGS_$(HAIKU_PACKAGING_ARCH)) \
		$(2) -o $(1) $(MBRFLAGS) -nostdlib -m32 -Wl,--oformat,binary -Wl,-z,notext \
		-Xlinker -S -Xlinker -N -Xlinker --entry=start -Xlinker -Ttext=0x600
}