haiku/build/jam/BuildSetup

# Variable naming conventions:
# TARGET_*:	A build system variable specifying a property for building for
#			the target platform (usually Haiku). E.g. TARGET_CC specifies the
#			compiler when building a target for the target platform.
# HOST_*:	A build system variable specifying a property of the platform
#			hosting the build. E.g. HOST_CC specifies the compiler when
#			building a target for the host platform (a build tool for
#			instance).
# HAIKU_*:	A build system variable specifying a build system property. Usually
#			directory paths and the like.


#pragma mark - container settings

# Haiku image
HAIKU_IMAGE_CONTAINER_NAME = haiku-image-container ;
HAIKU_CONTAINER_GRIST on $(HAIKU_IMAGE_CONTAINER_NAME) = HaikuImage ;
HAIKU_INCLUDE_IN_CONTAINER_VAR on $(HAIKU_IMAGE_CONTAINER_NAME)
	= HAIKU_INCLUDE_IN_IMAGE ;
HAIKU_INSTALL_TARGETS_VAR on $(HAIKU_IMAGE_CONTAINER_NAME)
	= HAIKU_IMAGE_INSTALL_TARGETS ;

# network boot archive
HAIKU_NET_BOOT_ARCHIVE_CONTAINER_NAME = haiku-netboot-archive-container ;
HAIKU_CONTAINER_GRIST on $(HAIKU_NET_BOOT_ARCHIVE_CONTAINER_NAME)
	= NetBootArchive ;
# HAIKU_INCLUDE_IN_CONTAINER_VAR -- update only mode not supported
HAIKU_INSTALL_TARGETS_VAR on $(HAIKU_NET_BOOT_ARCHIVE_CONTAINER_NAME)
	= HAIKU_NET_BOOT_ARCHIVE_INSTALL_TARGETS ;

# boot floppy
HAIKU_FLOPPY_BOOT_IMAGE_CONTAINER_NAME = haiku-boot-floppy-container ;
HAIKU_CONTAINER_GRIST on $(HAIKU_FLOPPY_BOOT_IMAGE_CONTAINER_NAME) = FloppyBootImage ;
# HAIKU_INCLUDE_IN_CONTAINER_VAR -- update only mode not supported
HAIKU_INSTALL_TARGETS_VAR on $(HAIKU_FLOPPY_BOOT_IMAGE_CONTAINER_NAME)
	= HAIKU_FLOPPY_BOOT_IMAGE_INSTALL_TARGETS ;

# boot CD image
HAIKU_CD_BOOT_IMAGE_CONTAINER_NAME = haiku-boot-cd-container ;
HAIKU_CONTAINER_GRIST on $(HAIKU_CD_BOOT_IMAGE_CONTAINER_NAME) = CDBootImage ;
# HAIKU_INCLUDE_IN_CONTAINER_VAR -- update only mode not supported
HAIKU_INSTALL_TARGETS_VAR on $(HAIKU_CD_BOOT_IMAGE_CONTAINER_NAME)
	= HAIKU_CD_BOOT_IMAGE_INSTALL_TARGETS ;

# analyze an optionally replace jam's target parameters
HAIKU_ORIGINAL_JAM_TARGETS = $(JAM_TARGETS) ;
if $(JAM_TARGETS) {
	# If the target to be built is "all" (i.e. the default) and we're in the
	# output directory, the root directory of the build system, or in "src/", we
	# change the target to be built to "haiku-image".
	if $(JAM_TARGETS) = all {
		if ! $(INVOCATION_SUBDIR) || $(INVOCATION_SUBDIR) = src {
			JAM_TARGETS = haiku-image ;
		}

	# The "run" target allows for running arbitrary command lines containing
	# build system targets, which are built and replaced accordingly.
	} else if $(JAM_TARGETS[1]) = run && $(JAM_TARGETS[2]) {
		local run = [ RunCommandLine $(JAM_TARGETS[2-]) ] ;
		JAM_TARGETS = $(run) ;

	# "update-image", "update-vmware-image", and "update-install" targets allow
	# for updating only specific targets in the image/installation dir.
	} else if $(JAM_TARGETS[1]) = update-image
		|| $(JAM_TARGETS[1]) = update-vmware-image
		|| $(JAM_TARGETS[1]) = update-install {
		SetUpdateHaikuImageOnly 1 ;
		HAIKU_INCLUDE_IN_IMAGE on $(JAM_TARGETS[2-]) = 1 ;

		if $(JAM_TARGETS[1]) = update-image {
			JAM_TARGETS = haiku-image ;
		} else if $(JAM_TARGETS[1]) = update-vmware-image {
			JAM_TARGETS = haiku-vmware-image ;
		} else {
			JAM_TARGETS = install-haiku ;
		}
	}
}


# Include BuildConfig/Timezones/libgccObjects
{
	local buildConfig = [ GLOB $(HAIKU_BUILD_OUTPUT_DIR) : BuildConfig ] ;
	local timezones = [ GLOB $(HAIKU_BUILD_OUTPUT_DIR) : Timezones ] ;
	local libgccObjects = [ GLOB $(HAIKU_BUILD_OUTPUT_DIR) : libgccObjects ] ;

	if ! $(buildConfig) {
		ECHO "No `BuildConfig' found in $(HAIKU_BUILD_OUTPUT_DIR)!" ;
		EXIT "Run ./configure in the source tree's root directory first!" ;
	}
	if ! ( $(timezones) && $(libgccObjects) ) {
		ECHO "No `Timezones' or `libgccObjects' found in $(HAIKU_BUILD_OUTPUT_DIR)!" ;
		EXIT "Please run ./configure in the source tree's root directory again!" ;
	}

	LOCATE on BuildConfig = $(HAIKU_BUILD_OUTPUT_DIR) ;
	LOCATE on Timezones = $(HAIKU_BUILD_OUTPUT_DIR) ;
	LOCATE on libgccObjects = $(HAIKU_BUILD_OUTPUT_DIR) ;

	include BuildConfig ;
	include Timezones ;
	include libgccObjects ;
}


# supported debug levels
HAIKU_DEBUG_LEVELS = 0 1 2 3 4 5 ;

# BeOS, BONE, Dan0 compatible platforms
HAIKU_BEOS_COMPATIBLE_PLATFORMS = haiku r5 bone dano haiku_host ;
HAIKU_BONE_COMPATIBLE_PLATFORMS = haiku bone dano haiku_host ;
HAIKU_DANO_COMPATIBLE_PLATFORMS = haiku dano haiku_host ;
HAIKU_HAIKU_COMPATIBLE_PLATFORMS = haiku haiku_host ;


#pragma mark -

# haiku target platform settings

# analyze GCC version
HAIKU_GCC_VERSION = [ FAnalyzeGCCVersion HAIKU_GCC_RAW_VERSION ] ;

# enable GCC -pipe option, if requested
if $(HAIKU_USE_GCC_PIPE) = 1 {
	HAIKU_GCC_BASE_FLAGS = -pipe ;
}

# override gcc 2.95.3's header directory -- strictly necessary only when using
# the BeOS native compiler (since its headers are incompatible), but it doesn't
# harm for the cross-compiler either.
if $(HAIKU_GCC_VERSION[1]) = 2 {
	HAIKU_GCC_HEADERS_DIR = [ FDirName $(HAIKU_TOP) headers build gcc-2.95.3 ] ;
}

# initial state for flags etc.
HAIKU_C++ ?= $(HAIKU_CC) ;
HAIKU_LINK = $(HAIKU_CC) ;
HAIKU_LINKFLAGS = $(HAIKU_GCC_BASE_FLAGS) ;

HAIKU_HDRS = [ FStandardHeaders ] ;
HAIKU_CCFLAGS = $(HAIKU_GCC_BASE_FLAGS) -nostdinc ;
HAIKU_C++FLAGS = $(HAIKU_GCC_BASE_FLAGS) -nostdinc ;
HAIKU_KERNEL_CCFLAGS = $(HAIKU_GCC_BASE_FLAGS) ;
HAIKU_KERNEL_C++FLAGS = $(HAIKU_GCC_BASE_FLAGS) ;
HAIKU_DEFINES = __HAIKU__ ;

# distro compatibility level defines
HAIKU_DISTRO_COMPATIBILITY ?= "default" ;
switch $(HAIKU_DISTRO_COMPATIBILITY) {
	case official	: HAIKU_DEFINES += HAIKU_DISTRO_COMPATIBILITY_OFFICIAL ;
	case compatible	: HAIKU_DEFINES += HAIKU_DISTRO_COMPATIBILITY_COMPATIBLE ;
	case "default"	: HAIKU_DEFINES += HAIKU_DISTRO_COMPATIBILITY_DEFAULT ;
	case *			: Exit "Invalid value for HAIKU_DISTRO_COMPATIBILITY:"
						$(HAIKU_DISTRO_COMPATIBILITY) ;
}

# analyze the gcc machine spec to determine HAIKU_CPU
switch $(HAIKU_GCC_MACHINE) {
	case i386-*		: HAIKU_CPU = x86 ;
	case i486-*		: HAIKU_CPU = x86 ;
	case i586-*		: HAIKU_CPU = x86 ;
	case i686-*		: HAIKU_CPU = x86 ;
	case powerpc-*	: HAIKU_CPU = ppc ;
	case m68k-*	: HAIKU_CPU = m68k ;
	case * : Exit "Unsupported gcc target machine:" $(HAIKU_GCC_MACHINE) ;
}

switch $(HAIKU_CPU) {
	case ppc :
	{
		HAIKU_DEFINES += __POWERPC__ ;
		HAIKU_BOOT_PLATFORM = openfirmware ;
	}
	case x86 :
	{
		HAIKU_DEFINES += __INTEL__ ;
		HAIKU_BOOT_PLATFORM = bios_ia32 ;
	}
	case m68k :
	{
		HAIKU_DEFINES += __M68K__ ;
		HAIKU_BOOT_PLATFORM = atari_m68k ;
	}
	case * :
		Exit "Currently unsupported target CPU:" $(HAIKU_CPU) ;
}
HAIKU_ARCH ?= $(HAIKU_CPU) ;
HAIKU_ARCH_MACRO_DEFINE = ARCH_$(HAIKU_ARCH) ;
HAIKU_DEFINES += $(HAIKU_ARCH_MACRO_DEFINE) ;

# directories
HAIKU_OBJECT_BASE_DIR = [ FDirName $(HAIKU_OBJECT_DIR) haiku ] ;
HAIKU_COMMON_ARCH_OBJECT_DIR = [ FDirName $(HAIKU_OBJECT_BASE_DIR) common ] ;
HAIKU_ARCH_OBJECT_DIR = [ FDirName $(HAIKU_OBJECT_BASE_DIR) $(HAIKU_ARCH) ] ;
HAIKU_COMMON_DEBUG_OBJECT_DIR = [ FDirName $(HAIKU_ARCH_OBJECT_DIR) common ] ;
HAIKU_DEBUG_0_OBJECT_DIR = [ FDirName $(HAIKU_ARCH_OBJECT_DIR) release ] ;

local level ;
for level in $(HAIKU_DEBUG_LEVELS[2-]) {
	HAIKU_DEBUG_$(level)_OBJECT_DIR
		= [ FDirName $(HAIKU_ARCH_OBJECT_DIR) debug_$(level) ] ;
}

# set variables for gcc header options
SetIncludePropertiesVariables HAIKU ;

# assembler flags
HAIKU_ASFLAGS = ;

# C/C++ flags
HAIKU_CCFLAGS += -Wno-multichar ;
HAIKU_C++FLAGS += -Wno-multichar ;

HAIKU_KERNEL_CCFLAGS += -finline -fno-builtin -Wno-multichar
	-DBOCHS_DEBUG_HACK=$(BOCHS_DEBUG_HACK) ;
HAIKU_KERNEL_C++FLAGS += -finline -fno-builtin -fno-exceptions -Wno-multichar
	-DBOCHS_DEBUG_HACK=$(BOCHS_DEBUG_HACK) ;
HAIKU_KERNEL_DEFINES += _KERNEL_MODE ;

if $(HAIKU_GCC_VERSION[1]) >= 3 {
	HAIKU_KERNEL_C++FLAGS += -fno-use-cxa-atexit ;
}

if $(HAIKU_GCC_VERSION[1]) >= 4 {
	HAIKU_C++FLAGS += -Wno-deprecated ;
}

HAIKU_KERNEL_PIC_CCFLAGS = -fno-pic ;
HAIKU_KERNEL_PIC_LINKFLAGS = ;
if $(HAIKU_ARCH) = ppc {
	# Build a position independent PPC kernel. We need to be able to relocate
	# the kernel, since the virtual address space layout at boot time is not
	# fixed.
	HAIKU_KERNEL_PIC_CCFLAGS = -fPIE ;
	HAIKU_KERNEL_PIC_LINKFLAGS = -shared -fPIE ;
}

# If the environment variable DEBUG_PRINTF is defined we define an equally
# named macro to the variable value. Some components use the macro to allow
# another function than printf() to print the debug output. The variable should
# be set to the name of the alternative function.
#
if $(DEBUG_PRINTF) {
	HAIKU_CCFLAGS += [ FDefines DEBUG_PRINTF=$(DEBUG_PRINTF) ] ;
	HAIKU_C++FLAGS += [ FDefines DEBUG_PRINTF=$(DEBUG_PRINTF) ] ;
}

# warning flags
HAIKU_WARNING_CCFLAGS = -Wall -Wno-trigraphs -Wmissing-prototypes -Wpointer-arith -Wcast-align
	-Wsign-compare ;
HAIKU_WARNING_C++FLAGS = -Wall -Wno-trigraphs -Wno-ctor-dtor-privacy
	-Woverloaded-virtual -Wpointer-arith -Wcast-align -Wsign-compare ;

HAIKU_KERNEL_WARNING_CCFLAGS = -Wall -Wno-trigraphs -Wmissing-prototypes ;
HAIKU_KERNEL_WARNING_C++FLAGS = -Wall -Wno-trigraphs ;

# debug flags
HAIKU_DEBUG_FLAGS ?= -ggdb ;

# debug 0: suppress asserts
HAIKU_DEBUG_0_CCFLAGS = [ FDefines NDEBUG=$(NDEBUG) ] ;
HAIKU_DEBUG_0_C++FLAGS = [ FDefines NDEBUG=$(NDEBUG) ] ;

HAIKU_KERNEL_DEBUG_0_CCFLAGS = [ FDefines NDEBUG=$(NDEBUG) ] ;
HAIKU_KERNEL_DEBUG_0_C++FLAGS = [ FDefines NDEBUG=$(NDEBUG) ] ;

local level ;
for level in $(HAIKU_DEBUG_LEVELS[2-]) {
	local flags = $(HAIKU_DEBUG_FLAGS) [ FDefines DEBUG=$(level) ] ;
	HAIKU_DEBUG_$(level)_CCFLAGS			= $(flags) ;
	HAIKU_DEBUG_$(level)_C++FLAGS			= $(flags) ;
	HAIKU_KERNEL_DEBUG_$(level)_CCFLAGS		= $(flags) ;
	HAIKU_KERNEL_DEBUG_$(level)_C++FLAGS	= $(flags) ;
}

if $(HAIKU_GCC_VERSION[1]) >= 3 {
	# TODO: Temporary work-around. Should be defined in the compiler specs
	HAIKU_LINKFLAGS += -Xlinker --no-undefined ;
} else {
	HAIKU_DEFINES += _BEOS_R5_COMPATIBLE_ ;
}

# private kernel headers to be used when compiling kernel code
HAIKU_PRIVATE_KERNEL_HEADERS =
	[ PrivateHeaders $(DOT) kernel libroot
		kernel/boot/platform/$(HAIKU_BOOT_PLATFORM) ]
	[ ArchHeaders $(HAIKU_ARCH) ]
;

# Add some grist to the libgcc objects
HAIKU_GCC_LIBGCC_OBJECTS = $(HAIKU_GCC_LIBGCC_OBJECTS:G=libgcc) ;

# the C++ library
if $(HAIKU_SHARED_LIBSTDC++) {
	HAIKU_LIBSTDC++ = $(HAIKU_SHARED_LIBSTDC++) ;
} else if $(HAIKU_STATIC_LIBSTDC++) {
	HAIKU_LIBSTDC++ = $(HAIKU_STATIC_LIBSTDC++) ;
} else {
	HAIKU_LIBSTDC++ = libstdc++.r4.so ;
}

# the C++ support library
if $(HAIKU_SHARED_LIBSUPC++) {
	HAIKU_LIBSUPC++ = $(HAIKU_SHARED_LIBSUPC++) ;
} else if $(HAIKU_STATIC_LIBSUPC++) {
	HAIKU_LIBSUPC++ = $(HAIKU_STATIC_LIBSUPC++) ;
} else {
	HAIKU_LIBSUPC++ = ;
}

# network libraries
HAIKU_NETWORK_LIBS = network ;
HAIKU_NETAPI_LIB = network ;
HAIKU_SELECT_UNAME_ETC_LIB = ;	# libroot, against which we link anyway

# library and executable glue code
local commonGlueCode =
	<src!system!glue>init_term_dyn.o
	<src!system!glue!arch!$(HAIKU_ARCH)>crti.o
	<src!system!glue!arch!$(HAIKU_ARCH)>crtn.o
;
HAIKU_LIBRARY_BEGIN_GLUE_CODE =
	<src!system!glue!arch!$(HAIKU_ARCH)>crti.o
	crtbegin.o
	<src!system!glue>init_term_dyn.o
;
HAIKU_LIBRARY_END_GLUE_CODE =
	# TODO: For the time being always link against libsupc++.a.
	$(HAIKU_STATIC_LIBSUPC++)
	crtend.o
	<src!system!glue!arch!$(HAIKU_ARCH)>crtn.o
;
HAIKU_EXECUTABLE_BEGIN_GLUE_CODE =
	<src!system!glue!arch!$(HAIKU_ARCH)>crti.o
	crtbegin.o
	<src!system!glue>start_dyn.o
	<src!system!glue>init_term_dyn.o
;
HAIKU_EXECUTABLE_END_GLUE_CODE = $(HAIKU_LIBRARY_END_GLUE_CODE) ;
HAIKU_KERNEL_ADDON_BEGIN_GLUE_CODE = crtbegin.o ;
HAIKU_KERNEL_ADDON_END_GLUE_CODE = $(HAIKU_GCC_LIBGCC) crtend.o ;

SEARCH on crtbegin.o crtend.o = $(HAIKU_GCC_LIB_DIR) ;

HAIKU_EXECUTABLE_MIME_TYPE = "application/x-vnd.Be-elfexecutable" ;

# TODO: The version stuff should probably go into a separate file and be made
# available as macro, too.
# Set our version number if not already set and mark it as a developer build
if ! $(HAIKU_BUILD_VERSION) {
	HAIKU_BUILD_VERSION ?= "1 0 0 a 1" ;
	HAIKU_BUILD_DESCRIPTION ?= "Developer Build" ;
}

# If HAIKU_BUILD_VERSION is set, but HAIKU_BUILD_DESCRIPTION isn't, mark it as
# an unknown build.
HAIKU_BUILD_DESCRIPTION ?= "Unknown Build" ;

# init library name map
{
	local i ;
	for i in be game GL mail media midi midi2 network netapi opengl screensaver root z
			textencoding tracker translation {
		HAIKU_LIBRARY_NAME_MAP_$(i) = lib$(i).so ;
	}
	HAIKU_LIBRARY_NAME_MAP_libstdc++ = $(HAIKU_LIBSTDC++) ;
	HAIKU_LIBRARY_NAME_MAP_input_server = <nogrist>input_server ;
}


#pragma mark -

# host platform settings

# enable GCC -m32 option, if requested
if $(HAIKU_HOST_USE_32BIT) = 1 {
	HOST_GCC_BASE_FLAGS = -m32 ;
}


# save jam's variables for the build platform
HOST_AR				?= $(AR) ;
HOST_CC				?= $(CC) ;
HOST_C++			?= $(C++) ;
HOST_LINK			?= $(LINK) ;
HOST_LD				?= ld ;			# TODO: Fix this!
HOST_OBJCOPY		?= objcopy ;	#
HOST_RANLIB			?= $(RANLIB) ;
HOST_CPPFLAGS		?= $(CPPFLAGS) ;
HOST_CCFLAGS		?= $(HOST_GCC_BASE_FLAGS) $(CCFLAGS) ;
HOST_C++FLAGS		?= $(HOST_GCC_BASE_FLAGS) $(C++FLAGS) ;
HOST_LDFLAGS		?= $(HOST_GCC_BASE_FLAGS) $(LDFLAGS) ;
HOST_LINKFLAGS		?= $(HOST_GCC_BASE_FLAGS) $(LINKFLAGS) ;
HOST_DEFINES		?= $(DEFINES) ;
HOST_HDRS			?= $(HDRS) ;


# split up HOST_AR into the command name and flags
HOST_AR				= [ Match "([^ ]*) *(.*)" : $(HOST_AR[1]) ]
					  $(HOST_AR[2-]) ;
HOST_ARFLAGS		= $(HOST_AR[2-]) ;
HOST_AR				= $(HOST_AR[1]) ;
HOST_UNARFLAGS		?= x ;

# check the host platform compatibility
SetPlatformCompatibilityFlagVariables HOST_PLATFORM : HOST : host
	: linux freebsd darwin ;

if $(HOST_PLATFORM) = linux || $(HOST_PLATFORM) = freebsd
	|| $(HOST_PLATFORM) = darwin {
	# don't use lex: otherwise rc will not work correctly
	if $(LEX) = lex {
		LEX = flex ;
	}
}

HOST_CPU	?= $(OSPLAT:L) ;

HOST_ARCH				?= $(HOST_CPU) ;
HOST_ARCH_MACRO_DEFINE	= ARCH_$(HOST_CPU) ;

# directories
HOST_OBJECT_BASE_DIR = [ FDirName $(HAIKU_OBJECT_DIR) $(HOST_PLATFORM) ] ;
HOST_COMMON_ARCH_OBJECT_DIR = [ FDirName $(HOST_OBJECT_BASE_DIR) common ] ;
HOST_ARCH_OBJECT_DIR = [ FDirName $(HOST_OBJECT_BASE_DIR) $(HOST_ARCH) ] ;
HOST_COMMON_DEBUG_OBJECT_DIR = [ FDirName $(HOST_ARCH_OBJECT_DIR) common ] ;
HOST_DEBUG_0_OBJECT_DIR = [ FDirName $(HOST_ARCH_OBJECT_DIR) release ] ;

local level ;
for level in $(HAIKU_DEBUG_LEVELS[2-]) {
	HOST_DEBUG_$(level)_OBJECT_DIR
		= [ FDirName $(HOST_ARCH_OBJECT_DIR) debug_$(level) ] ;
}

# analyze GCC version
HOST_GCC_VERSION = [ FAnalyzeGCCVersion HOST_GCC_RAW_VERSION ] ;

# set variables for gcc header options
SetIncludePropertiesVariables HOST ;

# assembler flags
HOST_ASFLAGS = ;

# C/C++ flags
HOST_CCFLAGS += -Wno-multichar ;
HOST_C++FLAGS += -Wno-multichar ;

HOST_PIC_CCFLAGS += -fPIC ;
HOST_PIC_C++FLAGS += -fPIC ;

HOST_KERNEL_CCFLAGS += $(HOST_GCC_BASE_FLAGS) -finline -fno-builtin
	-DBOCHS_DEBUG_HACK=$(BOCHS_DEBUG_HACK) -D_KERNEL_MODE ;
HOST_KERNEL_C++FLAGS += $(HOST_GCC_BASE_FLAGS) -finline -fno-builtin
	-fno-exceptions -DBOCHS_DEBUG_HACK=$(BOCHS_DEBUG_HACK) -D_KERNEL_MODE ;
HOST_KERNEL_DEFINES += _KERNEL_MODE ;

HOST_KERNEL_PIC_CCFLAGS = -fno-pic ;
HOST_KERNEL_PIC_LINKFLAGS = ;
if $(HOST_ARCH) = ppc {
	# Build a position independent PPC kernel. We need to be able to relocate
	# the kernel, since the virtual address space layout at boot time is not
	# fixed.
	HOST_KERNEL_PIC_CCFLAGS = -fPIE ;
	HOST_KERNEL_PIC_LINKFLAGS = -shared -fPIE ;
}

# warning flags
HOST_WARNING_CCFLAGS = -Wall -Wno-trigraphs -Wmissing-prototypes -Wpointer-arith -Wcast-align
	-Wsign-compare ;
HOST_WARNING_C++FLAGS = -Wall -Wno-trigraphs -Wno-ctor-dtor-privacy
	-Woverloaded-virtual -Wpointer-arith -Wcast-align -Wsign-compare ;

HOST_KERNEL_WARNING_CCFLAGS = -Wall -Wno-trigraphs -Wmissing-prototypes ;
HOST_KERNEL_WARNING_C++FLAGS = -Wall -Wno-trigraphs ;

# debug flags
switch $(HOST_PLATFORM) {
	case haiku	: HOST_DEBUG_FLAGS ?= -ggdb ;
	case haiku_host	: HOST_DEBUG_FLAGS ?= -ggdb ;
	case linux	: HOST_DEBUG_FLAGS ?= -ggdb ;
	case freebsd    : HOST_DEBUG_FLAGS ?= -ggdb ;
	case darwin : HOST_DEBUG_FLAGS ?= -ggdb ;
	case *		: HOST_DEBUG_FLAGS ?= -g ;
}

# debug 0: suppress asserts
HOST_DEBUG_0_CCFLAGS = [ FDefines NDEBUG=$(NDEBUG) ] ;
HOST_DEBUG_0_C++FLAGS = [ FDefines NDEBUG=$(NDEBUG) ] ;

HOST_KERNEL_DEBUG_0_CCFLAGS = [ FDefines NDEBUG=$(NDEBUG) ] ;
HOST_KERNEL_DEBUG_0_C++FLAGS = [ FDefines NDEBUG=$(NDEBUG) ] ;

local level ;
for level in $(HAIKU_DEBUG_LEVELS[2-]) {
	local flags = $(HOST_DEBUG_FLAGS) [ FDefines DEBUG=$(level) ] ;
	HOST_DEBUG_$(level)_CCFLAGS			= $(flags) ;
	HOST_DEBUG_$(level)_C++FLAGS		= $(flags) ;
	HOST_KERNEL_DEBUG_$(level)_CCFLAGS	= $(flags) ;
	HOST_KERNEL_DEBUG_$(level)_C++FLAGS	= $(flags) ;
}

# ld flags
if $(HOST_ARCH) = x86 && $(HAIKU_HOST_USE_32BIT) = 1 {
	HOST_LDFLAGS += -melf_i386 ;
}

# private kernel headers do be used when compiling kernel code
HOST_PRIVATE_KERNEL_HEADERS = ;

# under BeOS use copyattr instead of cp
if $(HOST_PLATFORM_BEOS_COMPATIBLE)
{
	CP = copyattr --data ;
}

HOST_DEFINES += $(HOST_ARCH_MACRO_DEFINE) ;
HOST_DEFINES += _NO_INLINE_ASM ;

if $(HOST_PLATFORM_BEOS_COMPATIBLE) {
	# TODO: That's obviously not correct, but in the way the COMPILE_FOR_R5
	# macro is used, it actually seems to mean r5/bone/dano.
	# TODO: Deprecated. Remove!
	HOST_DEFINES += COMPILE_FOR_R5 ;
}

# for builds of tools in the current environment
HOST_BUILD_COMPATIBILITY_LIB_DIR = [ FDirName $(HOST_OBJECT_BASE_DIR) lib ] ;

# For the generic attributes emulation: Target rm_attrs -- rm replacement that
# also removes the attributes.
HOST_RM_ATTRS_TARGET = ;

if $(HOST_PLATFORM_BEOS_COMPATIBLE) {
	HOST_LIBSTDC++ = stdc++.r4 ;
	HOST_LIBROOT = root ;
	HOST_STATIC_LIBROOT = $(HOST_LIBROOT) ;
	HOST_LIBBE = be ;
	HOST_ADD_BUILD_COMPATIBILITY_LIB_DIR = ;
	HOST_LIBRARY_NAME_MAP_input_server = /system/servers/input_server ;
} else {
	HOST_LIBSTDC++ = stdc++ ;
	HOST_LIBROOT = libroot_build.so ;
	HOST_STATIC_LIBROOT = libroot_build.a ;
	HOST_LIBBE = libbe_build.so ;
	HOST_ADD_BUILD_COMPATIBILITY_LIB_DIR
		= "export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$(HOST_BUILD_COMPATIBILITY_LIB_DIR)" ;

	# the C++ support library
	if $(HOST_GCC_VERSION[1]) < 3 {
		HOST_LIBSUPC++ = ;
	} else {
		HOST_LIBSUPC++ = supc++ ;
	}

	if $(HOST_PLATFORM) = darwin {
		# part of the C++ runtime lives in libstdc++ on Darwin
		HOST_LIBSUPC++ = gcc_s.1 stdc++ ;
		HOST_LIBSTDC++ = ;
	}

	# Unlike glibc FreeBSD's libc doesn't have built-in regex support.
	if $(HOST_PLATFORM) = freebsd {
		HOST_LIBROOT += /usr/lib/libgnuregex.so ;
		HOST_STATIC_LIBROOT += /usr/lib/libgnuregex.so ;
	} else if $(HOST_PLATFORM) = darwin {
		HOST_LIBROOT += /opt/local/lib/libgnuregex.dylib ;
		HOST_STATIC_LIBROOT += /opt/local/lib/libgnuregex.dylib ;
	}


	# The BeOS compilers define __INTEL__ respectively __POWERPC__. On the
	# build platform we need to make sure, this is also defined.
	if $(HOST_CPU) = x86 {
		HOST_DEFINES += __INTEL__ ;
	} else if $(HOST_CPU) = ppc {
		HOST_DEFINES += __POWERPC__ ;
	} else if $(HOST_CPU) = m68k {
		HOST_DEFINES += __M68K__ ;
	}

	# Supposing this is a glibc platform, let's try to get features like large
	# file support, ISO C 99 definitions, etc. On some platforms we need to
	# request 64 bit off_t support explicitely.
	HOST_DEFINES += _GNU_SOURCE _FILE_OFFSET_BITS=64 ;

	# On Linux with xattr support we can use it for our attribute emulation,
	# which is somewhat more robust.
	if $(HAIKU_HOST_USE_XATTR) = 1 {
		HOST_DEFINES += HAIKU_HOST_USE_XATTR ;
	} else {
		# Otherwise the generic attribute emulation is used, which uses a
		# directory per file to store its attribute. We need to redefine RM so
		# that the attributes are removed as well. We use a wrapper script, which
		# invokes a build tool. If the build tool hasn't been built yet, the
		# normal "rm" is used and the attributes are leaked (likely there aren't
		# any yet).
		RM = $(HOST_ADD_BUILD_COMPATIBILITY_LIB_DIR) ";"
			[ FDirName $(HAIKU_TOP) build scripts rm_attrs ]
			[ FDirName $(HAIKU_OBJECT_DIR) $(HOST_PLATFORM) $(HOST_ARCH) release
				tools rm_attrs ] -f ;
			# assumes that rm_attrs is built with debugging disabled
		HOST_RM_ATTRS_TARGET = <build>rm_attrs ;
	}
}

# network libraries
if $(HOST_PLATFORM_HAIKU_COMPATIBLE) {
	HOST_NETWORK_LIBS = network ;
	HOST_NETAPI_LIB = network ;
	HOST_SELECT_UNAME_ETC_LIB = ;	# libroot
} else if $(HOST_PLATFORM_BONE_COMPATIBLE) {
	HOST_NETWORK_LIBS = socket bind ;
	HOST_NETAPI_LIB = bnetapi ;
	HOST_SELECT_UNAME_ETC_LIB = ;	# libroot
} else if $(HOST_PLATFORM_BEOS_COMPATIBLE) {
	HOST_NETWORK_LIBS = net ;
	HOST_NETAPI_LIB = netapi ;
	HOST_SELECT_UNAME_ETC_LIB = net ;
} else {
	# Linux,...
	HOST_NETWORK_LIBS = ;
	HOST_NETAPI_LIB = ;
	HOST_SELECT_UNAME_ETC_LIB = ;
}

# define the executable MIME type
HOST_EXECUTABLE_MIME_TYPE = "application/x-vnd.Be-elfexecutable" ;

if $(METROWERKS) {
	# at least parts of Haiku still can be compiled with
	# the Metrowerks compiler on BeOS/PPC
	HOST_EXECUTABLE_MIME_TYPE = "application/x-be-executable" ;
}

# Be API compatibility
HOST_BE_API_HEADERS = ;
HOST_BE_API_CCFLAGS = ;
HOST_BE_API_C++FLAGS = ;

if ! $(HOST_PLATFORM_BEOS_COMPATIBLE) {
	HOST_BE_API_HEADERS =
		[ FDirName $(HAIKU_TOP) headers build ]
		[ FDirName $(HAIKU_TOP) headers build os ]
		[ FDirName $(HAIKU_TOP) headers build os app ]
		[ FDirName $(HAIKU_TOP) headers build os drivers ]
		[ FDirName $(HAIKU_TOP) headers build os kernel ]
		[ FDirName $(HAIKU_TOP) headers build os interface ]
		[ FDirName $(HAIKU_TOP) headers build os storage ]
		[ FDirName $(HAIKU_TOP) headers build os support ]
	;
	HOST_BE_API_CCFLAGS = -include BeOSBuildCompatibility.h ;
	HOST_BE_API_C++FLAGS = $(HOST_BE_API_CCFLAGS) ;
}

# Add directory with system headers we need when building something for the host
# platform, e.g. containing missing POSIX/GNU headers.
HOST_HDRS += [ FDirName $(HAIKU_TOP) headers build host $(HOST_PLATFORM) ] ;

# For all versions of BeOS also add the common beos directory.
if $(HOST_PLATFORM) in r5 bone dano {
	HOST_HDRS += [ FDirName $(HAIKU_TOP) headers build host beos_common ] ;
}


#pragma mark -

# target platform settings

# check the target platform compatibility
SetPlatformCompatibilityFlagVariables TARGET_PLATFORM : TARGET : target ;

# check the compatibility between host and target platform
if $(TARGET_PLATFORM) != haiku {
	if ! $(HOST_PLATFORM_($(TARGET_PLATFORM))_COMPATIBLE) {
		Exit ERROR: The host platform is not compatible with target platform
			$(TARGET_PLATFORM). ;
	}
}

# Set TARGET_* variables either from HAIKU_* or HOST_* depending on the
# specified TARGET_PLATFORM.

local buildVars =
	ARCH CPU GCC_VERSION

	AR CC C++ LD OBJCOPY RANLIB

	INCLUDES_SEPARATOR LOCAL_INCLUDES_OPTION SYSTEM_INCLUDES_OPTION

	HDRS CPPFLAGS CCFLAGS C++FLAGS LDFLAGS LINK LINKFLAGS DEFINES
	ARFLAGS UNARFLAGS
	KERNEL_DEFINES

	KERNEL_CCFLAGS KERNEL_C++FLAGS
	KERNEL_PIC_CCFLAGS KERNEL_PIC_LINKFLAGS
	WARNING_CCFLAGS WARNING_C++FLAGS

	KERNEL_WARNING_CCFLAGS KERNEL_WARNING_C++FLAGS

	DEBUG_FLAGS

	DEBUG_$(HAIKU_DEBUG_LEVELS)_CCFLAGS DEBUG_$(HAIKU_DEBUG_LEVELS)_C++FLAGS

	KERNEL_DEBUG_$(HAIKU_DEBUG_LEVELS)_CCFLAGS
	KERNEL_DEBUG_$(HAIKU_DEBUG_LEVELS)_C++FLAGS

	PRIVATE_KERNEL_HEADERS

	LIBSTDC++ LIBSUPC++

	NETWORK_LIBS NETAPI_LIB SELECT_UNAME_ETC_LIB

	ARCH_MACRO_DEFINE EXECUTABLE_MIME_TYPE

	OBJECT_BASE_DIR COMMON_ARCH_OBJECT_DIR COMMON_DEBUG_OBJECT_DIR
	DEBUG_$(HAIKU_DEBUG_LEVELS)_OBJECT_DIR
;

if $(TARGET_PLATFORM) = haiku {
	local var ;
	for var in $(buildVars) {
		TARGET_$(var) = $(HAIKU_$(var)) ;
	}

	TARGET_GCC_LIB_DIR			= $(HAIKU_GCC_LIB_DIR) ;
	TARGET_GCC_HEADERS_DIR		= $(HAIKU_GCC_HEADERS_DIR) ;
	TARGET_GCC_LIBGCC			= $(HAIKU_GCC_LIBGCC) ;
	TARGET_GCC_LIBGCC_OBJECTS	= $(HAIKU_GCC_LIBGCC_OBJECTS) ;

	TARGET_BOOT_PLATFORM		?= $(HAIKU_BOOT_PLATFORM) ;

	TARGET_LIBRARY_NAME_MAP		= HAIKU_LIBRARY_NAME_MAP ;

} else {
	local var ;
	for var in $(buildVars) {
		TARGET_$(var) = $(HOST_$(var)) ;
	}

	TARGET_GCC_LIB_DIR			= ;
	TARGET_GCC_HEADERS_DIR		= ;
	TARGET_GCC_LIBGCC			= ;
	TARGET_GCC_LIBGCC_OBJECTS	= ;

	TARGET_BOOT_PLATFORM		= ;

	TARGET_LIBRARY_NAME_MAP		= HOST_LIBRARY_NAME_MAP ;
}

# define macro, for identifying the platform
switch $(TARGET_PLATFORM) {
	case r5			: TARGET_DEFINES	+= HAIKU_TARGET_PLATFORM_BEOS ;
	case bone		: TARGET_DEFINES	+= HAIKU_TARGET_PLATFORM_BONE ;
	case dano		: TARGET_DEFINES	+= HAIKU_TARGET_PLATFORM_DANO ;
	case haiku_host	: TARGET_DEFINES	+= HAIKU_TARGET_PLATFORM_HAIKU ;
	case haiku		: TARGET_DEFINES	+= HAIKU_TARGET_PLATFORM_HAIKU ;
	case linux		: TARGET_DEFINES	+= HAIKU_TARGET_PLATFORM_LINUX ;
	case freebsd	: TARGET_DEFINES	+= HAIKU_TARGET_PLATFORM_FREEBSD ;
	case darwin		: TARGET_DEFINES	+= HAIKU_TARGET_PLATFORM_DARWIN ;
	case libbe_test	: TARGET_DEFINES	+= HAIKU_TARGET_PLATFORM_LIBBE_TEST ;
}

# define macro, for identifying the host platform
switch $(HOST_PLATFORM) {
	case r5			: HOST_DEFINES	+= HAIKU_HOST_PLATFORM_BEOS ;
	case bone		: HOST_DEFINES	+= HAIKU_HOST_PLATFORM_BONE ;
	case dano		: HOST_DEFINES	+= HAIKU_HOST_PLATFORM_DANO ;
	case haiku_host	: HOST_DEFINES	+= HAIKU_HOST_PLATFORM_HAIKU ;
	case linux		: HOST_DEFINES	+= HAIKU_HOST_PLATFORM_LINUX ;
	case freebsd	: HOST_DEFINES	+= HAIKU_HOST_PLATFORM_FREEBSD ;
	case darwin		: HOST_DEFINES	+= HAIKU_HOST_PLATFORM_DARWIN ;
}


#pragma mark -

# In case we build for a BeOS compatible platform, but not for Haiku, we
# include the HaikuBuildCompatibility.h header and link against
# libhaikucompat.a.

if ! $(TARGET_PLATFORM_HAIKU_COMPATIBLE) && $(TARGET_PLATFORM_BEOS_COMPATIBLE) {
	# headers and flags
	local compatibilityHeader = -include [ FDirName $(HAIKU_TOP) headers build
		HaikuBuildCompatibility.h ] ;
	TARGET_CCFLAGS += $(compatibilityHeader) ;
	TARGET_C++FLAGS += $(compatibilityHeader) ;

	# compatibility library
	TARGET_HAIKU_COMPATIBILITY_LIBS = libhaikucompat.a ;
}

# special target libbe_test

if $(TARGET_PLATFORM) = libbe_test {
	# headers and flags
	TARGET_HDRS +=
		[ PublicHeaders $(DOT) app drivers game interface kernel storage
			support ]
		[ PrivateHeaders $(DOT) ] ;
	TARGET_DEFINES += __HAIKU__ ;

	# directories
	TARGET_OBJECT_BASE_DIR
		= [ FDirName $(HAIKU_OBJECT_DIR) $(TARGET_PLATFORM) ] ;
	TARGET_COMMON_ARCH_OBJECT_DIR
		= [ FDirName $(TARGET_OBJECT_BASE_DIR) common ] ;
	TARGET_ARCH_OBJECT_DIR
		= [ FDirName $(TARGET_OBJECT_BASE_DIR) $(TARGET_ARCH) ] ;
	TARGET_COMMON_DEBUG_OBJECT_DIR
		= [ FDirName $(TARGET_ARCH_OBJECT_DIR) common ] ;
	TARGET_DEBUG_0_OBJECT_DIR
		= [ FDirName $(TARGET_ARCH_OBJECT_DIR) release ] ;

	local level ;
	for level in $(HAIKU_DEBUG_LEVELS[2-]) {
		TARGET_DEBUG_$(level)_OBJECT_DIR
			= [ FDirName $(TARGET_ARCH_OBJECT_DIR) debug_$(level) ] ;
	}

	# library name map
	TARGET_LIBRARY_NAME_MAP = LIBBE_LIBRARY_NAME_MAP ;
	LIBBE_LIBRARY_NAME_MAP_be = libbe_haiku.so ;
}


#pragma mark -

# common stuff

# start with a clean state
CCFLAGS = ;
C++FLAGS = ;
DEFINES = ;

# Set CC, C++, LINK to invalid values, so that we realize early, that we use
# the wrong compiler.
CC = bad-cc ;
C++ = bad-c++ ;
LINK = bad-link ;

# Allow compiling unit tests on Zeta. Instead of fixing the PostMessage()
# issues, they deprecated that nice function. This will enable it again:
C++FLAGS += -D_ZETA_USING_DEPRECATED_API_=1 ;
# Same for buggy find_directory threadsafety fixes
C++FLAGS += -D_ZETA_TS_FIND_DIR_=1 ;
	# TODO: Doesn't really belong here.


# Defaults for warnings, optimization, and debugging.
#
WARNINGS ?= 1 ;
OPTIM ?= -O2 ;
DEBUG ?= 0 ;


# Set the defaults for PLATFORM and SUPPORTED_PLATFORMS. PLATFORM is only
# overridden for targets to be built for the host platform. SUPPORTED_PLATFORMS
# can be overridden by the author of a component.
PLATFORM = $(TARGET_PLATFORM) ;
SUPPORTED_PLATFORMS = haiku ;


# Instructs the Library rule to not make its object files temporary.
# This is needed as some objects are used in a static library and for an
# executable.
KEEPOBJS = true ;


# output directories
# TODO: Review this.
HAIKU_DOCUMENTATION_DIR ?= [ FDirName $(HAIKU_OUTPUT_DIR) documentation ] ;
HAIKU_DOCUMENTATION_OBJECT_DIR ?= [ FDirName $(HAIKU_COMMON_PLATFORM_DIR)
	documentation ] ;

# TODO: Rethink test stuff.
HAIKU_TEST_DIR			?= [ FDirName $(HAIKU_OUTPUT_DIR) tests $(TARGET_PLATFORM) $(HAIKU_ARCH) ] ;
HAIKU_APP_TEST_DIR		?= [ FDirName $(HAIKU_TEST_DIR) apps ] ;
HAIKU_APP_TEST_LIB_DIR 	?= [ FDirName $(HAIKU_APP_TEST_DIR) lib ] ;
HAIKU_TMP_DIR			?= [ FDirName $(HAIKU_OUTPUT_DIR) tmp ] ;

HAIKU_PACKAGE_DIR ?= [ FDirName $(HAIKU_OUTPUT_DIR) packages ] ;
HAIKU_PACKAGE_OBJECT_DIR ?= [ FDirName $(HAIKU_OBJECT_DIR) packages ] ;

TARGET_TEST_DIR				?= [ FDirName $(HAIKU_TEST_DIR)
									$(TARGET_PLATFORM) ] ;
TARGET_UNIT_TEST_DIR		?= [ FDirName $(TARGET_TEST_DIR) unittests ] ;
TARGET_UNIT_TEST_LIB_DIR	?= [ FDirName $(TARGET_UNIT_TEST_DIR) lib ] ;

# automatically setup the objects directory per subdirectory
SUBDIRRULES += SetupObjectsDir ;

# Add the standard (userland) warning flags variables to the ones restored in
# every subdirectory. Thus we can easily meddle with them in subdirectories
# with imported sources.
AUTO_SET_UP_CONFIG_VARIABLES +=
	HOST_WARNING_CCFLAGS HOST_WARNING_C++FLAGS
	TARGET_WARNING_CCFLAGS TARGET_WARNING_C++FLAGS

	# also add PLATFORM and SUPPORTED_PLATFORMS
	PLATFORM SUPPORTED_PLATFORMS
;