rule SetupKernel
{
	# Usage SetupKernel <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) ;
	}

	local object ;
	for object in $(objects) {
		# add kernel flags for the object
		ObjectCcFlags $(object) : $(TARGET_KERNEL_CCFLAGS) $(2) ;
		ObjectC++Flags $(object) : $(TARGET_KERNEL_C++FLAGS) $(2) ;
		ObjectDefines $(object) : $(TARGET_KERNEL_DEFINES) ;

		# 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 KernelObjects
{
	SetupKernel $(1) : $(2) ;
	Objects $(1) ;
}

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

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

	LINKFLAGS on $(1) = $(4) ;
	if $(3) { LINKFLAGS on $(1) += --script=$(3) ; }

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

	HAIKU_TARGET_IS_EXECUTABLE on $(1) = 1 ;

	# TODO: Do we really want to invoke SetupKernel here? The objects should
	# have been compiled with KernelObjects anyway, so we're doing that twice.
	SetupKernel $(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 KernelLd bind VERSION_SCRIPT
{
	$(LINK) $(LINKFLAGS) -o "$(1)" "$(2)" $(LINKLIBS) \
		--version-script=$(VERSION_SCRIPT)
}

rule KernelSo target : source
{
	# KernelSo <target> : <source>

	Depends $(target) : <build>copyattr $(source) ;

	MakeLocateDebug $(1) ;
	KernelSo1 $(target) : <build>copyattr $(source) ;
}

actions KernelSo1
{
	$(HOST_ADD_BUILD_COMPATIBILITY_LIB_DIR)

	$(2[1]) --data $(2[2]) $(1) &&
	$(HAIKU_ELFEDIT_$(TARGET_PACKAGING_ARCH)) --output-type dyn $(1)
}

rule KernelAddon
{
	# KernelAddon <name> : <sources> : <static-libraries> : <res> ;
	#
	local target = $(1) ;
	local sources = $(2) ;
	local libs = $(3) ;
	AddResources $(1) : $(4) ;

	local kernel ;
	local beginGlue ;
	local endGlue ;
	on $(target) {
		# platform supported?
		if ! $(PLATFORM) in $(SUPPORTED_PLATFORMS) {
			return ;
		}

		# determine which kernel and glue code to link against
		if $(PLATFORM) = haiku {
			kernel = <nogrist>kernel.so ;
			beginGlue = $(HAIKU_KERNEL_ADDON_BEGIN_GLUE_CODE) ;
			endGlue
				= [ TargetKernelLibgcc ] $(HAIKU_KERNEL_ADDON_END_GLUE_CODE) ;
		} else if $(PLATFORM) = haiku_host {
			kernel = /boot/develop/lib/x86/kernel.so ;
			beginGlue = $(HAIKU_KERNEL_ADDON_BEGIN_GLUE_CODE) ;
			endGlue = $(HAIKU_KERNEL_ADDON_END_GLUE_CODE) ;
		} else {
			kernel = /boot/develop/lib/x86/_KERNEL_ ;
		}
	}

	# add glue code
	LINK_BEGIN_GLUE on $(target) = $(beginGlue) ;
	LINK_END_GLUE on $(target) = $(endGlue) ;
	Depends $(target) : $(beginGlue) $(endGlue) ;

	# compile and link
	SetupKernel $(sources) : : false ;
	local linkFlags = -nostdlib -Xlinker --no-undefined
		-Xlinker -soname=\"$(target:G=)\" $(TARGET_KERNEL_ADDON_LINKFLAGS) ;
	LINKFLAGS on $(target) = [ on $(target) return $(LINKFLAGS) ] $(linkFlags) ;
	Main $(target) : $(sources) ;
	LinkAgainst $(target) : $(libs) $(kernel) ;
}

rule KernelMergeObject
{
	# KernelMergeObject <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.
	#

	SetupKernel $(2) : $(3) ;
	Objects $(2) ;
	MergeObjectFromObjects $(1) : $(2:S=$(SUFOBJ)) : $(4) ;
}

rule KernelStaticLibrary
{
	# Usage KernelStaticLibrary <name> : <sources> : <extra cc flags>  ;
	# This is designed to take a set of sources and libraries and create
	# a static library.

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

rule KernelStaticLibraryObjects
{
	# Usage KernelStaticLibrary <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
	SetupKernel $(2) ;
	LocalClean clean : $(1) ;
	LocalDepends all : $(1) ;
	Depends $(1) : $(2) ;

	MakeLocateDebug $(1) ;
}

actions KernelStaticLibraryObjects
{
	# 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)" ;
}