# Vanilla Jam compatibility
if ! $(INVOCATION_SUBDIR_SET) {

	rule FIsPrefix
	{
		# FIsPrefix <a> : <b> ;
		# Returns true, if list <a> is a prefix (a proper one or equal) of
		# list <b>, an empty list otherwise.
		local a = $(1) ;
		local b = $(2) ;
		while $(a) && $(a[1]) = $(b[1]) {
			a = $(a[2-]) ;
			b = $(b[2-]) ;
		}
	
		if $(a) {
			return ;
		} else {
			return true ;
		}
	}

	rule LocalClean { Clean $(1) : $(2) ; }

	rule LocalDepends { Depends $(1) : $(2) ; }

} # vanilla Jam compatibility


# Include BuildConfig
{
	local buildConfig = [ GLOB $(OBOS_TOP) : BuildConfig ] ;
	if ! $(buildConfig)
	{
		EXIT "No BuildConfig!"
			 "Run ./configure in the source tree's root directory first!" ;
	}
	include $(buildConfig) ;
}

# Determine if we're building on PPC or x86
# Determine mimetype of executable
# Cross compiling can come later

if $(METROWERKS) {
	OBOS_TARGET ?= "ppc.R1" ;
	OBOS_TARGET_TYPE ?= "application/x-be-executable" ;
	OBOS_ARCH ?= "ppc" ; 
	OBOS_TARGET_DEFINE ?= "ARCH_ppc" ;
} else {
	OBOS_TARGET ?= "x86.R1" ;
	OBOS_TARGET_TYPE ?= "application/x-vnd.Be-elfexecutable" ;
	OBOS_ARCH ?= "x86" ;
	OBOS_TARGET_DEFINE ?= "ARCH_x86" ;
	OBOS_TARGET_DIR ?= "x86" ;
}

# Enable warnings only if WARNINGS is defined
# Should be enabled by default later

if $(WARNINGS) {
	# For an explanation of the different warning options, see:
	# http://gcc.gnu.org/onlinedocs/gcc-2.95.3/gcc_2.html
	# to get even more warnings, add:
	# -Wwrite-strings  	(doesn't work well with some Be headers)
	# -Wundef			(dito)
	# -Wconversion		(gets you many warnings about implicit conversions)
	# -W				(gets you even more warnigs)
	CCFLAGS ?= "-Wall -Wno-multichar -Wmissing-prototypes" ;
	CCFLAGS += "-Wpointer-arith -Wcast-align -Wsign-compare" ;
	C++FLAGS ?= "-Wall -Wno-multichar -Wmissing-prototypes -Wno-ctor-dtor-privacy -Woverloaded-virtual" ;
	C++FLAGS += "-Wpointer-arith -Wcast-align -Wsign-compare" ;
}

# We might later want to introduce debug levels or handle the whole issue
# differently. For now there's only on or off.
#
if $(DEBUG) {
	OPTIM ?= -O0 ;
	CCFLAGS += -g ;
	C++FLAGS += -g ;
	LINKFLAGS += -g ;
} else {
	OPTIM ?= -O2 ;
}

KERNEL_CCFLAGS ?= "-Wall -Wno-multichar -Wmissing-prototypes -finline -nostdinc" ;
KERNEL_CCFLAGS += "-fno-builtin -D$(OBOS_TARGET_DEFINE) " ;
KERNEL_CCFLAGS += "-DBOCHS_E9_HACK=$(BOCHS_E9_HACK) " ;

AR = ar r ;

# If no OBOS_OBJECT_TARGET is not defined yet, use our default directory and
# include our "OBOS_TARGET" as subdirectory in there (to prevent different
# builds mixing objects from different targets).
if ! $(OBOS_OBJECT_TARGET) {
	OBOS_OBJECT_TARGET ?= [ FDirName $(OBOS_TOP) objects $(OBOS_TARGET) ] ;
}

# If no OBOS_DISTRO_TARGET is not defined yet, use our default directory and
# include our "OBOS_TARGET" as subdirectory in there (to prevent different
# builds mixing executables from different targets).
if ! $(OBOS_DISTRO_TARGET) {
	OBOS_DISTRO_TARGET ?= [ FDirName $(OBOS_TOP) distro $(OBOS_TARGET) ] ;
}

# Set our version number if not already set and mark it as a developer build
if ! $(OBOS_BUILD_VERSION) {
	OBOS_BUILD_VERSION ?= "1 0 0 a 1" ;
	OBOS_BUILD_DESCRIPTION ?= "Developer Build" ;
}

# If OBOS_BUILD_VERSION is set, but OBOS_BUILD_DESCRIPTION isn't, mark it as
# an unknown build.
if ! $(OBOS_BUILD_DESCRIPTION) {
	OBOS_BUILD_DESCRIPTION ?= "Unknown Build" ;
}

# Relative subdirs for distro dir (these are for *INTERNAL* use by the following rules only!)
OBOS_APPS_DIR   ?= [ FDirName $(OBOS_DISTRO_TARGET) beos apps ] ;
OBOS_BIN_DIR    ?= [ FDirName $(OBOS_DISTRO_TARGET) beos bin ] ;
OBOS_PREFS_DIR  ?= [ FDirName $(OBOS_DISTRO_TARGET) beos preferences ] ;
OBOS_SERVER_DIR ?= [ FDirName $(OBOS_DISTRO_TARGET) beos system servers ] ;
OBOS_ADDON_DIR  ?= [ FDirName $(OBOS_DISTRO_TARGET) beos system add-ons ] ;
OBOS_SHLIB_DIR  ?= [ FDirName $(OBOS_DISTRO_TARGET) beos system lib ] ;
OBOS_STLIB_DIR  ?= [ FDirName $(OBOS_DISTRO_TARGET) beos system lib ] ;
OBOS_KERNEL_DIR ?= [ FDirName $(OBOS_DISTRO_TARGET) beos system ] ;
OBOS_TEST_DIR   ?= [ FDirName $(OBOS_TOP) tests ] ;

OBOS_KERNEL_CONFIG = config.$(OBOS_ARCH).ini ;
OBOS_KERNEL = kernel.$(OBOS_ARCH) ;
OBOS_FLOPPY = floppy.$(OBOS_ARCH) ;

rule SetupIncludes
{
	OBOS_INCLUDES ?= . add-ons app be_apps device drivers game interface kernel mail media midi midi2 net opengl storage support translation ;
	UsePublicHeaders $(OBOS_INCLUDES) ;
    UsePosixHeaders ;
}

#-------------------------------------------------------------------------------
# Things Jam needs in order to work :)
#-------------------------------------------------------------------------------

rule UserObject
{
	switch $(2)
	{
	case *.S    : assemble $(1) : $(2) ;
	case *.o    : return ;
	case *      : ECHO "unknown suffix on" $(2) ;
	}
}

# Override the default to give "prettier" command lines.
actions Cc 
{
	$(CC) -c "$(2)" $(CCFLAGS) $(CCDEFS) $(CCHDRS) -o "$(1)" ;
}

actions C++
{
	$(C++) -c "$(2)" $(C++FLAGS) $(CCDEFS) $(CCHDRS) -o "$(1)" ;
}


#-------------------------------------------------------------------------------
# General High-level OBOS target rules
#-------------------------------------------------------------------------------

rule App
{
	# App <name> : <sources> ;
	SetupObjectsDir ;
	Main $(<) : $(>) ;
	MakeLocate $(<) : $(OBOS_APPS_DIR) ;
}

rule BinCommand
{
	# BinCommand <name> : <sources> : <libraries> ;
	SetupObjectsDir ;
	Main $(1) : $(2) ;
	MakeLocate $(1) : $(OBOS_BIN_DIR) ;
	LinkSharedOSLibs $(1) : $(3) ;
}

rule StdBinCommands
{
	# StdBinCommands <sources> : <libs> ;
	local libs = $(2) ;
	for source in $(1)
	{
		local target = $(source:S=) ;
		target = [ FGristFiles $(target) ] ;
		BinCommand $(target) : $(source) : $(libs) ;
	}
}

rule Preference
{
	# Preference <name> : <sources> ;
#	SetupIncludes ;
	SetupObjectsDir ;
	Main $(<) : $(>) ;
	MakeLocate $(<) : $(OBOS_PREFS_DIR) ;
}

rule Server
{
	# Server <name> : <sources> ;
	
#	SetupIncludes ;
	SetupObjectsDir ;
	Main $(<) : $(>) ;
	MakeLocate $(<) : $(OBOS_SERVER_DIR) ;
}

# test pseudo targets
NOTFILE obostests ;
NOTFILE r5tests ;

rule CommonTestLib
{
	# CommonUnitTest <target> : <sources> : <obos libraries> 
	#	: <r5 libraries> : <public headers>;
	# Builds a unit test for both OBOS and R5 modules.
	# <target> The name of the target.
	# <sources> The list of sources.
	# <obos libraries> A list of link libraries for the OBOS tests (as passed
	# to LinkSharedOSLibs).
	# <r5 libraries> A list of link libraries for the R5 tests (as passed
	# to LinkSharedOSLibs).
	# <public headers> A list of public header dirs (as passed to
	# UsePublicHeaders).

	local testlibdir = [ FDirName $(OBOS_TEST_DIR) lib ] ; #/boot/home/config/lib/obos_tests ;

	TestLib $(1) : $(2) : $(testlibdir) : $(3) : $(5) ;
	R5TestLib $(1) : $(2) : $(testlibdir) : $(4) ;
}

rule TestLib
{
	# TestLib <target> : <sources> : <dest> : <libraries> : <public headers>
	# Builds a unit test library for an OBOS module.
	# <target> The name of the target.
	# <sources> The list of sources.
	# <dest> The directory for the target (as passed to FDirName).
	# <libraries> A list of link libraries (as passed to LinkSharedOSLibs).
	# <public headers> A list of public header dirs (as passed to
	# UsePublicHeaders).

	local target = $(1) ;
	local sources = $(2) ;
	local dest = $(3) ;
	local libraries = $(4) ;
	local headerDirs = $(5) ;

	# Turn optimization off.
	local optim = $(OPTIM) ;
	OPTIM = ;

#	SetupIncludes ;
	UseCppUnitHeaders ;
	SetupObjectsDir ;
	MakeLocateObjects $(sources) ;
	Main $(target) : $(sources) ;
	MakeLocate $(target) : $(dest) ;
	Depends $(target) : libcppunit.so ;
	Depends obostests : $(target) ;
	LinkSharedOSLibs $(target) : libcppunit.so $(libraries) ;
	UsePublicObjectHeaders $(sources) : $(headerDirs) ;
	ObjectDefines $(sources) : TEST_OBOS ;
	LINKFLAGS on $(target) = $(LINKFLAGS) -nostart -Xlinker -soname=\"$(target)\" ;

	# Turn debugging on. That is usually desired for test code.
	ObjectCcFlags $(sources) : "-g" ;
	ObjectC++Flags $(sources) : "-g" ;

	# Turn optimization on again.
	OPTIM = $(optim) ;
}

rule R5TestLib
{
	# R5UnitTest <target> : <sources> : <dest> : <libraries>
	# Builds a unit test for an R5 module. "_r5" is appended to the object
	# and the target name.
	# <target> The name of the target.
	# <sources> The list of sources.
	# <dest> The directory for the target (as passed to FDirName).
	# <libraries> A list of link libraries (as passed to LinkSharedOSLibs).

	local target = $(1:B)_r5$(1:S) ;
	local sources = $(2) ;
	local dest = $(3)_r5 ;
	local libraries = $(4) ;
	local objects = [ R5ObjectNames $(sources) ] ;

	# Turn optimization off.
	local optim = $(OPTIM) ;
	OPTIM = ;

	UseCppUnitHeaders ;
	SetupObjectsDir ;
	MakeLocateObjects $(objects) ;

	# Our Main replacement.
	MainFromObjects $(target) : $(objects) ;
	local source ;
	for source in [ FGristFiles $(sources) ]
	{
		local object = [ R5ObjectNames $(source) ] ;
		Object $(object) : $(source) ;
		LocalDepends obj : $(object) ;
	}

	MakeLocate $(target) : $(dest) ;
	Depends $(target) : libcppunit.so ;
	Depends r5tests : $(target) ;
	LinkSharedOSLibs $(target) : libcppunit.so $(libraries) ;
	ObjectDefines $(objects) : TEST_R5 ;
	LINKFLAGS on $(target) = $(LINKFLAGS) -nostart -Xlinker -soname=\"$(target)\" ;

	# Turn debugging on. That is usually desired for test code.
	ObjectCcFlags $(objects) : "-g" ;
	ObjectC++Flags $(objects) : "-g" ;

	# Turn optimization on again.
	OPTIM = $(optim) ;
}

rule CommonUnitTest
{
	# CommonUnitTest <target> : <sources> : <dest> : <obos libraries> 
	#	: <r5 libraries> : <public headers>;
	# Builds a unit test for both OBOS and R5 modules.
	# <target> The name of the target.
	# <sources> The list of sources.
	# <dest> The directory for the target (as passed to FDirName).
	# <obos libraries> A list of link libraries for the OBOS tests (as passed
	# to LinkSharedOSLibs).
	# <r5 libraries> A list of link libraries for the R5 tests (as passed
	# to LinkSharedOSLibs).
	# <public headers> A list of public header dirs (as passed to
	# UsePublicHeaders).

	UnitTest $(1) : $(2) : $(3) : $(4) : $(6) ;
	R5UnitTest $(1) : $(2) : $(3) : $(5) ;
}

rule UnitTest
{
	# UnitTest <target> : <sources> : <dest> : <libraries> : <public headers>
	# Builds a unit test for an OBOS module.
	# <target> The name of the target.
	# <sources> The list of sources.
	# <dest> The directory for the target (as passed to FDirName).
	# <libraries> A list of link libraries (as passed to LinkSharedOSLibs).
	# <public headers> A list of public header dirs (as passed to
	# UsePublicHeaders).

	local target = $(1) ;
	local sources = $(2) ;
	local dest = $(3) ;
	local libraries = $(4) ;
	local headerDirs = $(5) ;

	# Turn optimization off.
	local optim = $(OPTIM) ;
	OPTIM = ;

#	SetupIncludes ;
	UseCppUnitHeaders ;
	SetupObjectsDir ;
	MakeLocateObjects $(sources) ;
	Main $(target) : $(sources) ;
	MakeLocate $(target) : [ FDirName $(OBOS_TEST_DIR) $(dest) ] ;
	Depends $(target) : libcppunit.so ;
	Depends obostests : $(target) ;
	LinkSharedOSLibs $(target) : libcppunit.so $(libraries) ;
	UsePublicObjectHeaders $(sources) : $(headerDirs) ;
	ObjectDefines $(sources) : TEST_OBOS ;

	# Turn debugging on. That is usually desired for test code.
	ObjectCcFlags $(sources) : "-g" ;
	ObjectC++Flags $(sources) : "-g" ;

	# Turn optimization on again.
	OPTIM = $(optim) ;
}

rule R5UnitTest
{
	# R5UnitTest <target> : <sources> : <dest> : <libraries>
	# Builds a unit test for an R5 module. "_r5" is appended to the object
	# and the target name.
	# <target> The name of the target.
	# <sources> The list of sources.
	# <dest> The directory for the target (as passed to FDirName).
	# <libraries> A list of link libraries (as passed to LinkSharedOSLibs).

	local target = $(1)_r5 ;
	local sources = $(2) ;
	local dest = $(3) ;
	local libraries = $(4) ;
	local objects = [ R5ObjectNames $(sources) ] ;

	# Turn optimization off.
	local optim = $(OPTIM) ;
	OPTIM = ;

	UseCppUnitHeaders ;
	SetupObjectsDir ;
	MakeLocateObjects $(objects) ;

	# Our Main replacement.
	MainFromObjects $(target) : $(objects) ;
	local source ;
	for source in [ FGristFiles $(sources) ]
	{
		local object = [ R5ObjectNames $(source) ] ;
		Object $(object) : $(source) ;
		LocalDepends obj : $(object) ;
	}

	MakeLocate $(target) : [ FDirName $(OBOS_TEST_DIR) $(dest) ] ;
	Depends $(target) : libcppunit.so ;
	Depends r5tests : $(target) ;
	LinkSharedOSLibs $(target) : libcppunit.so $(libraries) ;
	ObjectDefines $(objects) : TEST_R5 ;

	# Turn debugging on. That is usually desired for test code.
	ObjectCcFlags $(objects) : "-g" ;
	ObjectC++Flags $(objects) : "-g" ;

	# Turn optimization on again.
	OPTIM = $(optim) ;
}

rule R5ObjectNames
{
	# R5ObjectNames <sources> ;
	# Returns a list of gristed object names given a list of source file names.
	# Moreover each object names gets "_r5" inserted before the object suffix.
	local objects = $(1:S=)_r5 ;
	return [ FGristFiles $(objects:S=$(SUFOBJ)) ] ;
}

rule SimpleTest
{
	# UnitTest <target> : <sources> : <libraries>
	# Builds a unit test for an OBOS module.
	# <target> The name of the target.
	# <sources> The list of sources.
	# <dest> The directory for the target (as passed to FDirName).
	# <libraries> A list of link libraries (as passed to LinkSharedOSLibs).
	# <public headers> A list of public header dirs (as passed to
	# UsePublicHeaders).

	local target = $(1) ;
	local sources = $(2) ;
	local libraries = $(3) ;
	local relPath = [ FRelPath src tests : $(SUBDIR_TOKENS) ] ;

	# Turn optimization off.
	local optim = $(OPTIM) ;
	OPTIM = ;

#	SetupIncludes ;
	SetupObjectsDir ;
	MakeLocateObjects $(sources) ;
	Main $(target) : $(sources) ;
	MakeLocate $(target) : [ FDirName $(OBOS_TEST_DIR) $(relPath) ] ;
	Depends obostests : $(target) ;
	LinkSharedOSLibs $(target) : $(libraries) ;
	ObjectDefines $(sources) : TEST_OBOS ;

	# Turn debugging on. That is usually desired for test code.
	ObjectCcFlags $(sources) : "-g" ;
	ObjectC++Flags $(sources) : "-g" ;

	# Turn optimization on again.
	OPTIM = $(optim) ;
}

rule Addon
{
	# Addon <name> : <relpath> : <sources> ;	
	
#	SetupIncludes ;
	SetupObjectsDir ;
	Main $(1) : $(3) ;

	# Create output dir path for addon
	local targetdir;
	targetdir = [ FDirName $(OBOS_ADDON_DIR) $(2) ] ;

	MakeLocate $(1) : $(targetdir) ;
	LINKFLAGS on $(1) = [ on $(1) return $(LINKFLAGS) ]
						-nostart -Xlinker -soname=\"$(1)\" ;
}

rule R5KernelAddon
{
	# R5KernelAddon <name> : <relpath> : <sources> ;	

	local sources = $(3) ;

	Addon $(1) : $(2) : $(3) ;
	ObjectCcFlags $(sources) : -D_KERNEL_MODE=1 -no-fpic ;
	ObjectC++Flags $(sources) : -D_KERNEL_MODE=1 -no-fpic
								-fno-exceptions -fno-rtti ;
	LINKFLAGS on $(1) = [ on $(1) return $(LINKFLAGS) ] -nostdlib ;
	LinkSharedOSLibs $(1) : /boot/develop/lib/x86/_KERNEL_ ;
}

rule MakeLocateObjects
{
	# MakeLocateObjects <gristed_sources_or_objects> ;
	
	local _objs = $(1:S=$(SUFOBJ)) ;
	
	for o in $(_objs)
	{
		local dir = $(o:D) ;
		if $(dir) {
			MakeLocate $(o) : [ FDirName $(LOCATE_TARGET) $(dir) ] ;
		} else {
			MakeLocate $(o) : $(LOCATE_TARGET) ;
		}
	}
}

rule StaticLibrary
{
	# StaticLibrary <name> : <sources> ;
	
#	SetupIncludes ;
	SetupObjectsDir ;
	MakeLocateObjects $(2) ;
	Library lib$(<).a : $(>) ;
	MakeLocate lib$(<).a : $(OBOS_STLIB_DIR) ;
}

rule SharedLibrary
{
	# SharedLibrary <name> : <sources> ;
	local _lib = lib$(1).so ;
	
#	SetupIncludes ;
	SetupObjectsDir ;
	MakeLocateObjects $(2) ;
	Main $(_lib) : $(2) ;
	MakeLocate $(_lib) : $(OBOS_SHLIB_DIR) ;
	LINKFLAGS on $(_lib) = [ on $(_lib) return $(LINKFLAGS) ]
						   -nostart -Xlinker -soname=\"$(_lib)\" ;
}

rule LinkSharedOSLibs
{
	# LinkSharedOSLibs <name> : <libs> ;
	# Valid elements for <libs> are e.g. "be" or "libopenbeos.so" or
	# "/boot/.../libfoo.so". If the basename starts with "lib" or the thingy
	# has a dirname or grist, it is added to the NEEDLIBS variable (i.e. the
	# file will be bound!), otherwise it is prefixed "-l" and added to
	# LINKLIBS.
	
	for i in $(>)
	{
		local isfile = ;
		if $(i:D) || $(i:G) {
			isfile = true ;
		} else {
			switch $(i:B)
			{
				case lib*	: isfile = true ;
				case *		: isfile = ;
			}
		}
		if $(isfile) {
			NEEDLIBS on $(1) = [ on $(1) return $(NEEDLIBS) ] $(i) ;
			Depends $(1) : $(i) ;
		} else {
			LINKLIBS on $(1) = [ on $(1) return $(LINKLIBS) ] -l$(i) ;
		}
	}
}

rule LinkStaticOSLibs
{
	# LinkStaticOSLibs <name> : <libs> ;
	
	for i in $(>)
	{
		LINKLIBS on $(<) = $(LINKLIBS) -l $(i) ;
	}
}

rule AddResources
{
	# AddResources <name> : <resourcefiles> ;

	SEARCH on $(2) += $(SEARCH_SOURCE) ;
	RESFILES on $(1) += $(2) ;
}

rule PublicHeaders
{
	# PublicHeaders <group list>
	#
	# Returns the directory names for the public header dirs identified by
	# <group list>.

	local list = $(1) ;
	local dirs ;
	for i in $(list) {
		dirs += [ FDirName $(OBOS_TOP) headers os $(i) ] ;
	}
	return $(dirs) ;
}

rule PrivateHeaders
{
	# PrivateHeaders <group list>
	#
	# Returns the directory names for the private header dirs identified by
	# <group list>.

	local list = $(1) ;
	local dirs ;
	for i in $(list) {
		dirs += [ FDirName $(OBOS_TOP) headers private $(i) ] ;
	}
	return $(dirs) ;
}

rule ArchHeaders
{
	# usage: ArchHeaders <arch> ;
	#
	# <arch> specifies the architecture (e.g. x86).

	return [ FDirName $(OBOS_TOP) headers private kernel arch $(1) ] ;
}

rule UsePublicHeaders
{
	# UsePublicHeaders <group list> ;
	#
	# Adds the public C header dirs given by <group list> to the header search
	# dirs of the subdirectory.
	# NOTE: This rule must be invoked *before* the rule that builds the objects.

	UseHeaders [ PublicHeaders $(1) ] ;
}

rule UsePublicObjectHeaders
{
	# UsePublicObjectHeaders <sources_or_objects> : <group list> ;
	#
	# Adds the public C header dirs given by <group list> to the header search
	# dirs of <sources_or_objects>.
	# NOTE: This rule must be invoked *after* the rule that builds the objects.

	ObjectHdrs $(1) : [ PublicHeaders $(2) ] ;
}

rule UsePrivateHeaders
{
	# UsePrivateHeaders <group list> ;
	#
	# Adds the private C header dirs given by <group list> to the header search
	# dirs of the subdirectory.
	# NOTE: This rule must be invoked *before* the rule that builds the objects.

	UseHeaders [ PrivateHeaders $(1) ] ;
}

rule UsePrivateObjectHeaders
{
	# UsePrivateObjectHeaders <sources_or_objects> : <group list> ;
	#
	# Adds the private C header dirs given by <group list> to the header search
	# dirs of <sources_or_objects>.
	# NOTE: This rule must be invoked *after* the rule that builds the objects.

	ObjectHdrs $(1) : [ PrivateHeaders $(2) ] ;
}

rule UseHeaders
{
	# UseHeaders <headers> ;
	#
	# Adds the C header dirs <headers> to the header search
	# dirs of the subdirectory.
	# NOTE: This rule must be invoked *before* the rule that builds the objects.

	local header ;
	for header in $(1) {
		SubDirHdrs $(header) ;
	}
}

rule UseCppUnitHeaders
{
	SubDirHdrs [ FDirName $(OBOS_TOP) headers tools cppunit ] ;
}

rule UseArchHeaders
{
	# usage: UseArchHeaders <arch> ;
	#
	# <arch> specifies the architecture (e.g. x86).
	# NOTE: This rule must be invoked *before* the rule that builds the objects.

	local headers = [ ArchHeaders $(1) ] ;
	local opt = -D$(OBOS_TARGET_DEFINE) ;

	SubDirCcFlags $(opt)  ;
	SubDirC++Flags $(opt)  ;
	SubDirHdrs $(headers) ;
}

rule UseArchObjectHeaders
{
	# usage: UseArchObjectHeaders <sources_or_objects> : <arch> ;
	#
	# <arch> specifies the architecture (e.g. x86).
	# <sources_or_objects> Source or object files.
	# NOTE: This rule must be invoked *after* the rule that builds the objects.

	local targets = $(1) ;
	local headers = [ ArchHeaders $(2) ] ;
	local opt = -D$(OBOS_TARGET_DEFINE) ;

	ObjectCcFlags $(targets) : $(opt)  ;
	ObjectC++Flags $(targets) : $(opt)  ;
	ObjectHdrs $(targets) : $(headers) ;
}

rule UsePosixHeaders
{
	# UsePrivateHeaders <group list> ;
	#
	# Adds the POSIX header dir to the header search
	# dirs of the subdirectory.
	# NOTE: This rule must be invoked *before* the rule that builds the objects.

	SubDirHdrs [ FDirName $(OBOS_TOP) headers posix ] ;
}

rule UsePosixObjectHeaders
{
	# UsePosixObjectHeaders <sources_or_objects> ;
	#
	# Adds the POSIX header dir to the header search
	# dirs of <sources_or_objects>.
	# NOTE: This rule must be invoked *after* the rule that builds the objects.

	ObjectHdrs $(1) : [ FDirName $(OBOS_TOP) headers posix ] ;
}

rule SplitPath
{
	# SplitPath <path> ;
	# Decomposes a path into its components.
	local path = $(1:G=) ;
	local components ;
	# $(path:D) for "/" is "/". Therefore the second condition.
	while $(path:D) && $(path:D) != $(path)
	{
		# Note: $(path:B) returns "." for "..", but $(path:D=) is fine.
		components = $(path:D=) $(components) ;
		path = $(path:D) ;
	}
	components = $(path) $(components) ;
	return $(components) ;
}

rule PrependObjectHdrs
{
	# PrependObjectHdrs <objects_or_sources> : <dirs> ;
	# Prepends <dirs> to the list of header search dirs of the objects
	# specified by <objects_or_sources>. The HDRS variable will not be
	# changed, only CCHDRS.
	# Note: A subsequent ObjectHdrs invocation will therefore undo the
	# effect of this rule.
	# NOTE: This is a hack.

	local objects = [ FGristFiles $(1:S=$(SUFOBJ)) ] ;
	local dirs = $(2) ;
	for object in $(objects) {
		# Don't change HDRS to avoid screwing up the header scanning.
		PREPENDED_HDRS on $(object)
			= $(dirs) [ on $(object) return $(PREPENDED_HDRS) ] ;
		CCHDRS on $(object)
			= [ FIncludes [ on $(object) return $(PREPENDED_HDRS) $(HDRS) ] ] ;
	}
}

rule SymLink
{
	# SymLink <target> : <source> ;
	# Links <target> to <source>.
	# <source> is the exact link contents. No binding is done.
	LINKCONTENTS on $(1) = $(2) ;
	SymLink1 $(1) ;
	LocalDepends all : $(target) ;
}

actions SymLink1
{
	$(RM) "$(1)" && $(LN) -s "$(LINKCONTENTS)" "$(1)"
}

rule RelSymLink
{
	# RelSymLink <link> : <link target>
	# Creates a relative symbolic link from <link> to <link target>.
	# <link> and <link target> can be usual targets. They may have a grist
	# and don't need to have any dirname. Their LOCATE variables are used to
	# find their locations.

	local target = $(1) ;
	local source = $(2) ;
	local targetDir = [ on $(target) FDirName $(LOCATE[1]) $(target:D) ] ;
	local sourceDir = [ on $(source) FDirName $(LOCATE[1]) $(source:D) ] ;
	local sourcePath = $(source:G=) ;
	sourcePath = $(sourcePath:D=$(sourceDir)) ;
	local targetDirComponents = [ SplitPath $(targetDir) ] ;
	local sourceComponents = [ SplitPath $(sourcePath) ] ;

	SymLink $(target)
		: [ FRelPath $(targetDirComponents) : $(sourceComponents) ] ;
	NOUPDATE $(target);
	Depends $(target) : $(source) ;
}

#-------------------------------------------------------------------------------
# Low-level OBOS utility rules
#-------------------------------------------------------------------------------
rule SetupObjectsDir
{
	local rel_objectsdir;
	
	# Copy subdir tokens except the first, as that will be "sources", and we
	# do not want to include that :)
	rel_objectsdir = [ FDirName $(SUBDIR_TOKENS[2-]) ] ;
	LOCATE_TARGET = [ FDirName $(OBOS_OBJECT_TARGET) $(rel_objectsdir) ] ;
}

#-------------------------------------------------------------------------------
# Link rule/action are overwritten as they don't handle linking files who's name 
# contain spaces very well. Also adds resources and version to executable.
#-------------------------------------------------------------------------------
rule Link
{
	# Note: RESFILES must be set before invocation.
	MODE on $(<) = $(EXEMODE) ;
	on $(1) XRes $(1) : $(RESFILES) ;
	SetVersion $(1) ;
	Chmod $(<) ;
	SetType $(1) ;
	MimeSet $(1) ;
}

actions Link bind NEEDLIBS
{
	$(LINK) $(LINKFLAGS) -o "$(1)" $(UNDEFS) "$(2)" "$(NEEDLIBS)" $(LINKLIBS) ;
}

# BeOS specific rules

rule XRes
{
	# XRes <target> : <resource files>
	if $(2)
	{
		Depends $(1) : $(2) ;
		XRes1 $(1) : $(2) ;
	}
}

rule XRes1 { }

rule SetVersion
{
	# SetVersion <target>
}

rule SetType
{
	# SetType <target>
}

rule MimeSet
{
	# SetType <target>
}


if $(OS) = BEOS
{

actions XRes1
{
	xres -o "$(1)" "$(2)" ;
}

actions SetVersion
{
	setversion "$(1)" -system $(OBOS_BUILD_VERSION) -short "$(OBOS_BUILD_DESCRIPTION)" ;
}

actions SetType
{
	settype -t $(OBOS_TARGET_TYPE) "$(1)" ;
}

actions MimeSet
{
	mimeset -f "$(1)" ;
}

}	# if BEOS


rule assemble
{
	Depends $(1) : $(2) ;
	LocalClean clean : $(1) ;
}

actions assemble
{
	$(CC) -c "$(2)" -O2 $(KERNEL_CCFLAGS) -o "$(1)" ;
}

# Overridden to allow spaces in file names.
actions Chmod1
{
	$(CHMOD) "$(MODE)" "$(1)"
}

rule ObjectReference
{
	# ObjectReference <reference object> : <source object>
	# Makes <reference object> refer to the same file as <source object>.
	# The filenames must of course be identical.
	# <source object> must have already been LOCATEd.

	local ref = $(1) ;
	local source = $(2) ;
	if $(ref) != $(source) {
		Depends $(ref) : $(source) ;
		on $(ref) LOCATE = [ on $(source) return $(LOCATE) ] ;
	}
}

rule ObjectReferences
{
	# ObjectReferences <source objects>
	# Creates local references to <source objects>, i.e. identifiers with the
	# current grist referring to the same files. <source objects> must have
	# already been LOCATEd.

	local source ;
	for source in $(1) {
		ObjectReference [ FGristFiles $(source) ] : $(source) ;
	}
}

rule Filter
{
	# Filter <list> : <excludes> ;
	# Removes all occurrences of <excludes> in <list>.

	local list = $(1) ;
	local excludes = $(2) ;
	local newList ;
	local item ;
	for item in $(list) {
		local skip ;
		local exclude ;
		for exclude in $(excludes) {
			if $(item) = $(exclude) {
				skip = true ;
			}
		}
		if ! $(skip) {
			newList += item ;
		}
	}
	return $(newList) ;
}


## Kernel stuff!

rule SetupKernel
{
	# Usage SetupKernel <sources_or_objects> : <extra_cc_flags>;

	local _objs = $(1:S=$(SUFOBJ)) ;

	UsePublicHeaders kernel support drivers ;
	UsePublicHeaders [ FDirName os kernel ] ;
	UsePrivateHeaders kernel ;
	UsePosixHeaders ;
	UseArchHeaders $(OBOS_ARCH) ;

	SetupObjectsDir ;
	
	CCFLAGS on $(_objs) = $(KERNEL_CCFLAGS) $(2) ;
	C++FLAGS on $(_objs) = $(KERNEL_CCFLAGS) $(2) ;
}

rule KernelObjects
{
	SetupKernel $(1) : $(2) ;

	Objects $(1) ;
}

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

	SetupKernel $(2) ;
	LINK on $(1) = ld ;

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

	# Remove any preset LINKLIBS
	LINKLIBS on $(1) =  ;

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

	if $(6) {
		for i in $(6) {
			KernelConfigSection $(i) : elf32 : $(1) ;
		}
	}
	
	MakeLocate $(1) : $(LOCATE_TARGET) ; 

	# Add libgcc.a - NB this should be detected not hard coded!
	if ! $(5) {
		LINKLIBS on $(1) += -L $(GCC_PATH) -lgcc ;
	}
}

actions KernelLd
{
	$(LINK) $(LINKFLAGS) -o "$(1)" "$(2)" $(LINKLIBS) ;
}

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

	SetupKernel $(2) : $(3) ;

	MakeLocateObjects $(2) ;
	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>

	SetupKernel $(2) ;

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

	MakeLocate $(1) : $(LOCATE_TARGET) ;
}

actions KernelStaticLibraryObjects
{
	ar -r "$(1)" "$(2)" ;
}

rule SystemMain
{
	# Usage SystemMain <target> : <sources> ;
	SetupObjectsDir ;

	LINKLIBS on $(1) = ;

	Main $(1) : $(2) ;
}

rule KernelConfigSection
{
	# KernelConfigSection <section> : <type> : <file>  ;

	SECTION_NAMES on $(OBOS_KERNEL_CONFIG) += $(1) ;
	SECTION_TYPES on $(OBOS_KERNEL_CONFIG) += $(2) ;
	SECTION_FILES on $(OBOS_KERNEL_CONFIG) += $(3) ;

	Depends $(OBOS_KERNEL_CONFIG) : $(3) ;
}

rule WriteKernelConfig
{
	# usage: WriteKernelConfig <target> ;

	LocalDepends files : $(1) ;
	
	MakeLocate $(1) : $(OBOS_OBJECT_TARGET) ;
	
	LocalClean clean : $(1) ;
}

actions WriteKernelConfig bind SECTION_FILES
{
	target="$(1)"
	echo "# OpenBeOS Kernel Config File" > "$target"
	echo "# Automatically generated - do not edit!" >> "$target"
	count=0
	for section in "$(SECTION_NAMES)" ; do
		count=`expr $count + 1`
		eval section$count="$section"
	done
	i=1
	for type in "$(SECTION_TYPES)" ; do
		eval type$i="$type"
		i=`expr $i + 1`
	done
	i=1
	for file in "$(SECTION_FILES)" ; do
		eval file$i="$file"
		i=`expr $i + 1`
	done
	for i in `seq $count` ; do
		eval section="\$section$i"
		eval type="\$type$i"
		eval file="\$file$i"
		echo "" >> "$target"
		echo "["$section"]" >> "$target"
		echo "type="$type >> "$target"
		case "$file" in
			/*) ;;
			*) file=`pwd`/"$file";;
		esac
		echo "file="$file >> "$target"
	done
}

rule BuildKernel
{
	# Usage BuildKernel <target> : <config_file> ;
	local kernel = $(1) ;
	local configFile = $(2) ;
	local bootmaker = bootmaker ;
	
	LocalDepends all : $(kernel) ;
	Depends $(kernel) : $(configFile) $(bootmaker) ;
	LocalClean clean : $(kernel) ;
	MakeLocate $(kernel) : $(LOCATE_TARGET) ;

	BOOT_MAKER on $(kernel) = $(bootmaker) ;
}

actions BuildKernel bind BOOT_MAKER
{
	"$(BOOT_MAKER)" --strip-debug --strip-binary strip "$(2)" -o "$(1)" ;
	echo ""
	echo "Kernel linked!"
	echo ""
}

rule KernelFloppyImage
{
	# Usage KernelFloppyImage <target> : <kernel> : <bootblock> ;
	local floppy = $(1) ;
	local kernel = $(2) ;
	local bootblock = $(3) ;
	local makeflop = makeflop ;

	LocalDepends all : $(floppy) ;
	Depends $(floppy) : $(kernel) $(bootblock) $(makeflop) ;
	LocalClean clean : $(floppy) ;
	MakeLocate $(floppy) : $(OBOS_OBJECT_TARGET) ;

	BOOT_BLOCK on $(floppy) = $(bootblock) ;
	MAKE_FLOP on $(floppy) = $(makeflop) ;
}

# This may be a bit verbose, but I think it's useful to show what's
# going on, at least in this early stage of development.
actions KernelFloppyImage bind BOOT_BLOCK bind MAKE_FLOP
{
	"$(MAKE_FLOP)" "$(BOOT_BLOCK)" "$(2)" "$(1)" ;

	echo ""
	echo "*************************************************"
	echo "*         Kernel build completed!               *"
	echo "*    Boot image for a 1.44M floppy created      *"
	echo "*************************************************"
	echo ""
	echo "Floppy image is $(1)"
	echo "The following command will write it to a floppy on BeOS"
	echo "  dd if=$(1) of=/dev/disk/floppy/raw bs=18k"
	echo "Alternatively you can run"
	echo "  ./configure --floppy /dev/disk/floppy/raw"
	echo "once and build + write the image subsequently via"
	echo "  jam installfloppy"
	echo ""
}

rule InstallFloppy
{
	# InstallFloppy <target> : <floppy>
	# "dd"s <floppy> to $(FLOPPY_PATH).

	local target = $(1) ;
	local floppy = $(2) ;

	NotFile $(target) ;
	Always $(target) ;
	Depends $(target) : $(floppy) ;
}

actions InstallFloppy
{
	if [ -z $(FLOPPY_PATH) ] ; then
		echo "Can't install floppy: FLOPPY_PATH not set."
		echo "run: ./configure --floppy <floppy path>"
		echo
		exit 0
	fi
	dd if=$(2) of=$(FLOPPY_PATH) bs=18k
}