#! /usr/bin/env python
# encoding: utf-8
# a1batross, mittorn, 2018

from waflib import Build, Context, Logs, TaskGen
from waflib.Tools import waf_unit_test, c_tests
import sys
import os

VERSION = '0.99'
APPNAME = 'xash3d-fwgs'
top = '.'
default_prefix = '/' # Waf uses it to set default prefix

Context.Context.line_just = 55 # should fit for everything on 80x26

c_tests.LARGE_FRAGMENT='''#include <unistd.h>
int check[sizeof(off_t) >= 8 ? 1 : -1]; int main(void) { return 0; }'''

@TaskGen.feature('cshlib', 'cxxshlib', 'fcshlib')
@TaskGen.before_method('apply_implib')
def remove_implib_install(self):
	if not getattr(self, 'install_path_implib', None):
		self.install_path_implib = None

@TaskGen.feature('cprogram', 'cxxprogram')
@TaskGen.before_method('apply_flags_msvc')
def apply_subsystem_msvc(self):
	if getattr(self, 'subsystem', None):
		return # have custom subsystem

	if 'test' in self.features:
		self.subsystem = self.env.CONSOLE_SUBSYSTEM

class Subproject:
	def __init__(self, name, fnFilter = None):
		self.name = name
		self.fnFilter = fnFilter

	def is_exists(self, ctx):
		return ctx.path.find_node(self.name + '/wscript')

	def is_enabled(self, ctx):
		if not self.is_exists(ctx):
			return False

		if self.fnFilter:
			return self.fnFilter(ctx)

		return True

class RefDll:
	def __init__(self, name, default, key = None):
		self.name = name
		self.default = default
		self.dest = key if key else name.upper()

	def register_option(self, opt):
		kw = dict()
		if self.default:
			act = 'disable'
			kw['action'] = 'store_false'
		else:
			act = 'enable'
			kw['action'] = 'store_true'

		key = '--%s-%s' % (act, self.name)

		kw['dest'] = self.dest
		kw['default'] = self.default
		kw['help'] = '%s %s renderer [default: %%(default)s]' % (act, self.name)

		opt.add_option(key, **kw)

	def register_env(self, env, opts, force):
		env[self.dest] = force or opts.__dict__[self.dest]

	def register_define(self, conf):
		conf.define_cond('XASH_REF_%s_ENABLED' % self.dest, conf.env[self.dest])

SUBDIRS = [
	# always configured and built
	Subproject('public'),
	Subproject('filesystem'),
	Subproject('stub/server'),
	Subproject('3rdparty/libbacktrace'),
	Subproject('3rdparty/library_suffix'),

	# disable only by engine feature, makes no sense to even parse subprojects in dedicated mode
	Subproject('3rdparty/extras',       lambda x: x.env.CLIENT and x.env.DEST_OS != 'android'),
	Subproject('3rdparty/nanogl',       lambda x: x.env.CLIENT and x.env.NANOGL),
	Subproject('3rdparty/gl-wes-v2',    lambda x: x.env.CLIENT and x.env.GLWES),
	Subproject('3rdparty/gl4es',        lambda x: x.env.CLIENT and x.env.GL4ES),
	Subproject('ref/common',            lambda x: x.env.CLIENT),
	Subproject('ref/gl',                lambda x: x.env.CLIENT and (x.env.GL or x.env.NANOGL or x.env.GLWES or x.env.GL4ES or x.env.GLES3COMPAT)),
	Subproject('ref/soft',              lambda x: x.env.CLIENT and x.env.SOFT),
	Subproject('ref/null',              lambda x: x.env.CLIENT and x.env.NULL),
	Subproject('3rdparty/bzip2',        lambda x: x.env.CLIENT and not x.env.HAVE_SYSTEM_BZ2),
	Subproject('3rdparty/opus',         lambda x: x.env.CLIENT and not x.env.HAVE_SYSTEM_OPUS),
	Subproject('3rdparty/libogg',       lambda x: x.env.CLIENT and not x.env.HAVE_SYSTEM_OGG),
	Subproject('3rdparty/vorbis',       lambda x: x.env.CLIENT and (not x.env.HAVE_SYSTEM_VORBIS or not x.env.HAVE_SYSTEM_VORBISFILE)),
	Subproject('3rdparty/opusfile',     lambda x: x.env.CLIENT and not x.env.HAVE_SYSTEM_OPUSFILE),
	Subproject('3rdparty/maintui',      lambda x: x.env.CLIENT and x.env.TUI),
	Subproject('3rdparty/mainui',       lambda x: x.env.CLIENT and x.env.DEST_OS != 'android'),
	Subproject('3rdparty/vgui_support', lambda x: x.env.CLIENT),
	Subproject('3rdparty/MultiEmulator',lambda x: x.env.CLIENT),
#	Subproject('3rdparty/freevgui',     lambda x: x.env.CLIENT),
	Subproject('stub/client',           lambda x: x.env.CLIENT),
	Subproject('game_launch',           lambda x: x.env.LAUNCHER),
	Subproject('engine'), # keep latest for static linking

	# enabled optionally
	Subproject('utils/mdldec',     lambda x: x.env.ENABLE_UTILS),
	Subproject('utils/xar',        lambda x: x.env.ENABLE_UTILS and x.env.ENABLE_XAR),
	Subproject('utils/run-fuzzer', lambda x: x.env.ENABLE_FUZZER),

	# enabled on PSVita only
	Subproject('ref/gl/vgl_shim',   lambda x: x.env.DEST_OS == 'psvita'),
]

REFDLLS = [
	RefDll('soft', True),
	RefDll('gl', True),
	RefDll('gles1', False, 'NANOGL'),
	RefDll('gles2', False, 'GLWES'),
	RefDll('gl4es', False),
	RefDll('gles3compat', False, 'GLES3COMPAT'),
	RefDll('null', False),
]

def options(opt):
	opt.load('reconfigure compiler_optimizations xshlib xcompile compiler_cxx compiler_c sdl2 clang_compilation_database strip_on_install waf_unit_test msvs subproject ninja')

	grp = opt.add_option_group('Common options')

	grp.add_option('-d', '--dedicated', action = 'store_true', dest = 'DEDICATED', default = False,
		help = 'only build Xash Dedicated Server [default: %(default)s]')

	grp.add_option('--enable-dedicated', action = 'store_true', dest = 'ENABLE_DEDICATED', default = False,
		help = 'enable building Xash Dedicated Server alongside client [default: %(default)s]')

	grp.add_option('--enable-tui', action = 'store_true', dest = 'ENABLE_TUI', default = False,
		help = 'enable TUI main menu [default: %(default)s]')

	grp.add_option('--gamedir', action = 'store', dest = 'GAMEDIR', default = 'valve',
		help = 'engine default (base) game directory [default: %(default)s]')

	grp.add_option('-8', '--64bits', action = 'store_true', dest = 'ALLOW64', default = False,
		help = 'allow targetting 64-bit engine(Linux/Windows only) [default: %(default)s]')

	grp.add_option('-4', '--32bits', action = 'store_true', dest = 'FORCE32', default = False,
		help = 'force targetting 32-bit engine, usually unneeded [default: %(default)s]')

	grp.add_option('-P', '--enable-packaging', action = 'store_true', dest = 'PACKAGING', default = False,
		help = 'respect prefix option, useful for packaging for various operating systems [default: %(default)s]')

	grp.add_option('--enable-bundled-deps', action = 'store_true', dest = 'BUILD_BUNDLED_DEPS', default = False,
		help = 'prefer to build bundled dependencies (like opus) instead of relying on system provided')

	grp.add_option('--enable-hl25-extended-structs', action = 'store_true', dest = 'SUPPORT_HL25_EXTENDED_STRUCTS', default = False,
		help = 'build engine and renderers with HL25 extended structs compatibility (might be required for some mods) [default: %(default)s]')

	grp.add_option('--low-memory-mode', action = 'store', dest = 'LOW_MEMORY', default = 0, type = int,
		help = 'enable low memory mode (only for devices have <128 ram)')

	grp.add_option('--disable-werror', action = 'store_true', dest = 'DISABLE_WERROR', default = False,
		help = 'disable compilation abort on warning')

	grp.add_option('--enable-tests', action = 'store_true', dest = 'TESTS', default = False,
		help = 'enable building standalone tests (does not enable engine tests!) [default: %(default)s]')

	grp.add_option('--disable-rpath', action = 'store_false', dest = 'ENABLE_RPATH', default = True,
		help = 'disables rpath, duh!')

	# a1ba: special option for me
	grp.add_option('--debug-all-servers', action='store_true', dest='ALL_SERVERS', default=False, help='')
	grp.add_option('--enable-msvcdeps', action='store_true', dest='MSVCDEPS', default=False, help='')
	grp.add_option('--enable-wafcache', action='store_true', dest='WAFCACHE', default=False, help='')

	grp = opt.add_option_group('Renderers options')

	grp.add_option('--enable-all-renderers', action='store_true', dest='ALL_RENDERERS', default=False,
		help = 'enable all renderers supported by Xash3D FWGS [default: %(default)s]')

	for dll in REFDLLS:
		dll.register_option(grp)

	grp = opt.add_option_group('Utilities options')

	grp.add_option('--enable-utils', action = 'store_true', dest = 'ENABLE_UTILS', default = False,
		help = 'enable building various development utilities [default: %(default)s]')

	grp.add_option('--enable-xar', action = 'store_true', dest = 'ENABLE_XAR', default = False,
		help = 'enable building Xash ARchiver (experimental) [default: %(default)s]')

	grp.add_option('--enable-fuzzer', action = 'store_true', dest = 'ENABLE_FUZZER', default = False,
		help = 'enable building libFuzzer runner [default: %(default)s]' )

	for i in SUBDIRS:
		if not i.is_exists(opt):
			continue

		opt.add_subproject(i.name)

def configure(conf):
	conf.load('fwgslib reconfigure compiler_optimizations')
	if conf.options.ALLOW64:
		conf.env.MSVC_TARGETS = ['x64']
	elif sys.maxsize > 2 ** 32 and not conf.options.MSVC_WINE:
		conf.env.MSVC_TARGETS = ['amd64_x86', 'x86']
	else:
		conf.env.MSVC_TARGETS = ['x86']

	# Load compilers early
	conf.load('xshlib xcompile compiler_c compiler_cxx')

	if not conf.options.WAFCACHE:
		conf.load('gccdeps')

		if conf.options.MSVCDEPS:
			conf.load('msvcdeps')

	conf.env.WAFCACHE = conf.options.WAFCACHE

	if conf.options.NSWITCH:
		conf.load('nswitch')

	if conf.options.PSVITA:
		conf.load('psvita')

	# HACKHACK: override msvc DEST_CPU value by something that we understand
	if conf.env.DEST_CPU == 'amd64':
		conf.env.DEST_CPU = 'x86_64'

	if conf.env.COMPILER_CC == 'msvc':
		conf.load('msvc_pdb')

	conf.load('msvs subproject clang_compilation_database strip_on_install waf_unit_test enforce_pic force_32bit ninja')

	conf.env.MSVC_SUBSYSTEM = 'WINDOWS'
	conf.env.CONSOLE_SUBSYSTEM = 'CONSOLE'

	# Windows XP compatibility
	if conf.env.MSVC_TARGETS[0] == 'amd64_x86' or conf.env.MSVC_TARGETS[0] == 'x86':
		conf.env.MSVC_SUBSYSTEM += ',5.01'
		conf.env.CONSOLE_SUBSYSTEM += ',5.01'

	# Set default options for some platforms
	if conf.env.DEST_OS == 'android':
		conf.options.NANOGL           = True
		conf.options.GLWES            = False # deprecated
		conf.options.GL4ES            = True
		conf.options.GLES3COMPAT      = True
		conf.options.GL               = False
	elif conf.env.IOS:
		conf.options.NANOGL           = True
		conf.options.GLWES            = False # deprecated
		conf.options.GL4ES            = False # doesn't compile on ios yet
		conf.options.GLES3COMPAT      = True
		conf.options.GL               = False
	elif conf.env.MAGX:
		conf.options.SDL12            = True
		conf.options.GL               = False
		conf.options.LOW_MEMORY       = 1
		enforce_pic = False
	elif conf.env.DEST_OS == 'emscripten':
		conf.options.BUILD_BUNDLED_DEPS = True
		conf.options.GLES3COMPAT      = True
		conf.options.GL               = False

	# psvita needs -fPIC set manually and static builds are incompatible with -fPIC
	enforce_pic = conf.env.DEST_OS != 'psvita' and not conf.env.STATIC_LINKING
	conf.check_pic(enforce_pic)

	# NOTE: We restrict 64-bit builds ONLY for Win/Linux running on Intel architecture
	# Because compatibility with original GoldSrc
	# NOTE: Since modern OSX (since Catalina) don't support 32-bit applications, there is no point
	# to restrict them to 32-bit engine, despite GoldSrc is still officially supported.
	# There is now `-4` (or `--32bits`) configure flag for those
	# who want to specifically build engine for 32-bit
	if conf.env.DEST_OS in ['win32', 'linux'] and conf.env.DEST_CPU == 'x86_64':
		force_32bit = not conf.options.ALLOW64
	else:
		force_32bit = conf.options.FORCE32

	if force_32bit:
		conf.force_32bit()

	cflags, linkflags = conf.get_optimization_flags()
	cxxflags = list(cflags) # optimization flags are common between C and C++ but we need a copy

	# on the Switch, allow undefined symbols by default, which is needed for libsolder to work
	# we'll specifically disallow them for the engine executable
	# additionally, shared libs are linked without standard libs, we'll add those back in the engine wscript
	if conf.env.DEST_OS == 'nswitch':
		linkflags.remove('-Wl,--no-undefined')
		conf.env.append_unique('LINKFLAGS_cshlib', ['-nostdlib', '-nostartfiles'])
		conf.env.append_unique('LINKFLAGS_cxxshlib', ['-nostdlib', '-nostartfiles'])
	# same on the vita
	elif conf.env.DEST_OS == 'psvita':
		conf.env.append_unique('CFLAGS_cshlib', ['-fPIC'])
		conf.env.append_unique('CXXFLAGS_cxxshlib', ['-fPIC', '-fno-use-cxa-atexit'])
		conf.env.append_unique('LINKFLAGS_cshlib', ['-nostdlib', '-Wl,--unresolved-symbols=ignore-all'])
		conf.env.append_unique('LINKFLAGS_cxxshlib', ['-nostdlib', '-Wl,--unresolved-symbols=ignore-all'])
	# check if we need to use irix linkflags
	elif conf.env.DEST_OS == 'irix' and conf.env.COMPILER_CC == 'gcc':
		linkflags.remove('-Wl,--no-undefined')
		linkflags.append('-Wl,-u,gl_INTERPRET_END')
		# check if we're in a sgug environment
		if 'sgug' in os.environ['LD_LIBRARYN32_PATH']:
			linkflags.append('-lc')
	elif conf.env.DEST_OS == 'darwin':
		try:
			linkflags.remove('-Wl,--no-undefined')
		except:
			pass
		linkflags.append('-Wl,-undefined,error')
	elif conf.env.SAILFISH:
		conf.define('XASH_SAILFISH', 1)

	conf.check_cc(cflags=cflags, linkflags=linkflags, msg='Checking for required C flags')
	conf.check_cxx(cxxflags=cxxflags, linkflags=linkflags, msg='Checking for required C++ flags')

	conf.env.append_unique('CFLAGS', cflags)
	conf.env.append_unique('CXXFLAGS', cxxflags)
	conf.env.append_unique('LINKFLAGS', linkflags)

	if conf.env.COMPILER_CC == 'msvc':
		opt_cflags = ['/we4013'] # -Werror=implicit-function-declaration
		conf.env.CFLAGS_werror = conf.filter_cflags(opt_cflags, cflags)
	else:
		opt_flags = [
			# '-Wall', '-Wextra', '-Wpedantic',
			'-fdiagnostics-color=always',

			# stable diagnostics, forced to error, sorted
			'-Werror=alloc-size',
			'-Werror=bool-compare',
			'-Werror=bool-operation',
			# '-Werror=cast-align=strict',
			'-Werror=duplicated-cond',
			'-Werror=format=2',
			'-Werror=free-nonheap-object',
			'-Werror=implicit-fallthrough=2',
			'-Werror=logical-op',
			'-Werror=nonnull',
			'-Werror=packed',
			'-Werror=packed-not-aligned',
			'-Werror=parentheses',
			'-Werror=return-type',
			'-Werror=sequence-point',
			'-Werror=sizeof-pointer-memaccess',
			'-Werror=sizeof-array-div',
			'-Werror=sizeof-pointer-div',
			'-Werror=strict-aliasing',
			'-Werror=string-compare',
			'-Werror=tautological-compare',
			'-Werror=use-after-free=3',
			'-Werror=vla',
			'-Werror=write-strings',

			# unstable diagnostics, may cause false positives
			'-Walloc-zero',
			'-Winit-self',
			'-Wmisleading-indentation',
			'-Wmismatched-dealloc',
			'-Wstringop-overflow',
			'-Wuninitialized',
			'-Wno-error=format-nonliteral',

			# disabled, flood
			# '-Wdouble-promotion',

			'-Wunused-function',
			'-Wunused-variable',
			'-Wunused-but-set-variable',
		]

		if conf.env.COMPILER_CC == 'clang':
			opt_flags += [
				'-Werror=unsequenced', # clang's version of -Werror=sequence-point
			]

		opt_cflags = [
			# disabled, as we're targetting C99 at least
			# '-Werror=declaration-after-statement',
			'-Werror=enum-conversion',
			'-Wno-error=enum-float-conversion', # need this for cvars
			'-Werror=implicit-int',
			'-Werror=implicit-function-declaration',
			'-Werror=incompatible-pointer-types',
			'-Werror=int-conversion',
			'-Werror=jump-misses-init',
			'-Werror=old-style-declaration',
			'-Werror=old-style-definition',
			'-Werror=strict-prototypes',
			'-fnonconst-initializers', # owcc
			'-Wmissing-prototypes', # not an error yet
		]

		opt_cxxflags = [] # TODO:

		if conf.options.DISABLE_WERROR:
			opt_flags = []
			opt_cflags = ['-Werror=implicit-function-declaration']
			opt_cxxflags = []

		conf.env.CFLAGS_werror = conf.filter_cflags(opt_flags + opt_cflags, cflags)
		conf.env.CXXFLAGS_werror = conf.filter_cxxflags(opt_flags + opt_cxxflags, cxxflags)

	conf.env.TESTS         = conf.options.TESTS
	conf.env.ENABLE_UTILS  = conf.options.ENABLE_UTILS
	conf.env.ENABLE_XAR    = conf.options.ENABLE_XAR
	conf.env.ENABLE_FUZZER = conf.options.ENABLE_FUZZER

	if not conf.options.DEDICATED:
		conf.env.SERVER = conf.options.ENABLE_DEDICATED
		conf.env.CLIENT = True
		conf.env.LAUNCHER = conf.env.DEST_OS not in ['android', 'nswitch', 'psvita', 'dos', 'emscripten'] and not conf.env.IOS and not conf.env.MAGX and not conf.env.STATIC_LINKING
	else:
		conf.env.SERVER = True
		conf.env.CLIENT = False
		conf.env.LAUNCHER = False

	conf.env.TUI = conf.options.ENABLE_TUI

	conf.define_cond('SUPPORT_HL25_EXTENDED_STRUCTS', conf.options.SUPPORT_HL25_EXTENDED_STRUCTS)

	if conf.options.ENABLE_RPATH and conf.env.DEST_OS not in ['nswitch', 'psvita']:
		if conf.env.DEST_OS == 'openbsd':
			# OpenBSD requires -z origin to enable $ORIGIN expansion in RPATH
			conf.env.RPATH_ST = '-Wl,-z,origin,-rpath,%s'
			conf.env.DEFAULT_RPATH = '$ORIGIN'
		elif conf.env.DEST_OS == 'irix':
			conf.env.DEFAULT_RPATH = '/usr/lib32:/usr/sgug/lib32'
		elif conf.env.DEST_OS == 'darwin':
			conf.env.DEFAULT_RPATH = '@loader_path'
		else:
			conf.env.DEFAULT_RPATH = '$ORIGIN'

	setattr(conf, 'refdlls', REFDLLS)

	for refdll in REFDLLS:
		refdll.register_env(conf.env, conf.options, conf.options.ALL_RENDERERS)

	conf.env.GAMEDIR = conf.options.GAMEDIR
	conf.define('XASH_GAMEDIR', conf.options.GAMEDIR)
	conf.define_cond('XASH_ALL_SERVERS', conf.options.ALL_SERVERS)

	if conf.env.DEST_OS == 'nswitch':
		conf.check_cfg(package='solder', args='--cflags --libs', uselib_store='SOLDER')
		if conf.env.HAVE_SOLDER and conf.env.LIB_SOLDER and conf.options.BUILD_TYPE == 'debug':
			conf.env.LIB_SOLDER[0] += 'd' # load libsolderd in debug mode
		conf.check_cc(lib='m')
	elif conf.env.DEST_OS == 'psvita':
		conf.check_cc(lib='vrtld')
		conf.check_cc(lib='m')
	elif conf.env.DEST_OS == 'android':
		# maybe there is some better check?
		if conf.find_program('termux-info', mandatory=False):
			conf.env.TERMUX = True
			conf.define('__TERMUX__', 1)

		conf.check_cc(lib='dl')
		conf.check_cc(lib='log')
		if not conf.options.ANDROID_OPTS:
			# if we're compiling on device itself
			conf.check_cc(lib='m')
		# otherwise LIB_M is defined by xcompile (as it might be libm_hard, depending on NDK configuration)
	elif conf.env.DEST_OS == 'win32':
		# Common Win32 libraries
		# Don't check them more than once, to save time
		# Usually, they are always available
		# but we need them in uselib
		a = [ 'user32', 'shell32', 'gdi32', 'advapi32', 'dbghelp', 'psapi', 'ws2_32' ]
		if conf.env.COMPILER_CC == 'msvc':
			for i in a:
				conf.start_msg('Checking for MSVC library')
				conf.check_lib_msvc(i)
				conf.end_msg(i)
		else:
			for i in a:
				conf.check_cc(lib = i)
	else:
		conf.check_cc(lib='dl', mandatory = False)
		conf.check_cc(lib='m')


	# set _FILE_OFFSET_BITS=64 for filesystems with 64-bit inodes
	# must be set globally as it changes ABI
	if conf.env.DEST_OS == 'android' and conf.env.DEST_SIZEOF_VOID_P == 4:
		# Android in 32-bit mode don't have good enough large file support
		# with our native API level
		# https://android.googlesource.com/platform/bionic/+/HEAD/docs/32-bit-abi.md
		pass
	elif conf.env.DEST_OS == 'psvita':
		# PSVita don't have large file support at all
		pass
	else:
		# try to guess how to support large files
		conf.check_large_file(compiler = 'c', execute = False)

	# indicate if we are packaging for Linux/BSD
	if conf.options.PACKAGING:
		conf.env.PREFIX = conf.options.prefix
		if conf.env.SAILFISH:
			conf.env.SHAREDIR = '${PREFIX}/share/harbour-xash3d-fwgs/rodir'
		else:
			conf.env.SHAREDIR = '${PREFIX}/share/xash3d'
			conf.env.LIBDIR += '/xash3d'
	else:
		conf.env.SHAREDIR = conf.env.LIBDIR = conf.env.BINDIR = conf.env.PREFIX

	if not conf.options.BUILD_BUNDLED_DEPS:
		# there was a check for system libbacktrace but we can't be sure if it supports fileline or not
		# therefore, always build libbacktrace ourselves

		if conf.env.CLIENT:
			for i in ('ogg','opusfile','vorbis','vorbisfile'):
				if conf.check_cfg(package=i, uselib_store=i, args='--cflags --libs', mandatory=False):
					conf.env['HAVE_SYSTEM_%s' % i.upper()] = True

				if conf.env.HAVE_SYSTEM_OPUSFILE:
					frag='''#include <opusfile.h>
int main(int argc, char **argv) { return opus_tagcompare(argv[0], argv[1]); }'''

					conf.env.HAVE_SYSTEM_OPUSFILE = conf.check_cc(msg='Checking for libopusfile sanity', use='opusfile werror', fragment=frag, mandatory=False)

			# search for opus 1.4 only, it has fixes for custom modes
			# 1.5 breaks custom modes: https://github.com/xiph/opus/issues/374
			have_opus = conf.check_cfg(package='opus', uselib_store='opus', args=['opus = 1.4', '--cflags', '--libs'], mandatory=False)

			# 1.6.1 fixes them again
			if not have_opus:
				have_opus = conf.check_cfg(package='opus', uselib_store='opus', args=['opus >= 1.6.1', '--cflags', '--libs'], mandatory=False)

			if have_opus:
				# now try to link with export that only exists with CUSTOM_MODES defined
				frag='''#include <opus_custom.h>
int main(void) { return !opus_custom_encoder_init((OpusCustomEncoder *)1, (const OpusCustomMode *)1, 1); }'''

				conf.env.HAVE_SYSTEM_OPUS = conf.check_cc(msg='Checking if opus supports custom modes', defines='CUSTOM_MODES=1', use='opus werror', fragment=frag, mandatory=False)

			# search for bzip2
			BZIP2_CHECK='''#include <bzlib.h>
int main(void) { return (int)BZ2_bzlibVersion(); }'''

			conf.env.HAVE_SYSTEM_BZ2 = conf.check_cc(lib='bz2', fragment=BZIP2_CHECK, uselib_store='bzip2', mandatory=False)

	conf.define('XASH_LOW_MEMORY', conf.options.LOW_MEMORY)

	for i in SUBDIRS:
		if not i.is_enabled(conf):
			continue

		conf.add_subproject(i.name)

def build(bld):
	# enable progress bar mode if stdout is a terminal
	if not bld.progress_bar and sys.stdout.isatty():
		bld.progress_bar = 1

	if bld.env.WAFCACHE:
		bld.load('wafcache')

	# guard rails to not let install to root
	if bld.is_install and not bld.options.PACKAGING and not bld.options.destdir:
		bld.fatal('Set the install destination directory using --destdir option')

	# don't clean QtCreator files and reconfigure saved options
	bld.clean_files = bld.bldnode.ant_glob('**',
		excl='.qtc* *.user configuration.py .lock* *conf_check_*/** config.log 3rdparty/libbacktrace/*.h %s/*' % Build.CACHE_DIR,
		quiet=True, generator=True)

	bld.load('xshlib')

	for i in SUBDIRS:
		if not i.is_enabled(bld):
			continue

		bld.add_subproject(i.name)

	if bld.env.TESTS:
		bld.add_post_fun(waf_unit_test.summary)
		bld.add_post_fun(waf_unit_test.set_exit_code)
