# -*- mode: python -*-
# coding=utf-8

#*****************************************************************************
#                    The Dark Mod GPL Source Code
# 
# This file is part of the The Dark Mod Source Code, originally based 
# on the Doom 3 GPL Source Code as published in 2011.
# 
# The Dark Mod Source Code is free software: you can redistribute it 
# and/or modify it under the terms of the GNU General Public License as 
# published by the Free Software Foundation, either version 3 of the License, 
# or (at your option) any later version. For details, see LICENSE.TXT.
# 
# Project: The Dark Mod Updater (http://www.thedarkmod.com/)
# 
# $Revision$ (Revision of last commit) 
# $Date$ (Date of last commit)
# $Author$ (Author of last commit)
# 
#*****************************************************************************

# The Dark Mod Updater build script for Linux
# Based on id's game sconscript
# Author: greebo

import sys, os, time, commands, re, pickle, StringIO, commands, pdb, string
import SCons

# choose configuration variables which should be saved between runs
# ( we handle all those as strings )
serialized=['CC', 'CXX', 'JOBS', 'BUILD']

# global build mode ------------------------------

# help -------------------------------------------

help_string = """
Usage: scons [OPTIONS] [TARGET]

[OPTIONS] and [TARGET] are covered in command line options, use scons -H

CC (default gcc)
CXX (default g++)
	Specify C and C++ compilers (defaults gcc and g++)
	ex: CC="gcc-3.3"
	You can use ccache and distcc, for instance:
	CC="ccache distcc gcc" CXX="ccache distcc g++"

JOBS (default 1)
	Parallel build

BUILD (default debug)
	Use debug-all/debug/release to select build settings
	ex: BUILD="release"
	debug-all: no optimisations, debugging symbols
	debug: -O -g
	release: all optimisations, including CPU target etc.

MACOSX_TARGET_ARCH (default 'i386')
	The target architecture when building in Mac OS X.
	valid values: 'ppc' or 'i386'. 

"""

Help( help_string )

# end help ---------------------------------------

# sanity -----------------------------------------

EnsureSConsVersion( 0, 98 )

# end sanity -------------------------------------

# system detection -------------------------------

# CPU type
cpu = commands.getoutput('uname -m')
exp = re.compile('.*i?86.*')
if exp.match(cpu):
	cpu = 'x86'
else:
	cpu = commands.getoutput('uname -p')
	if ( cpu == 'powerpc' ):
		cpu = 'ppc'
	else:
		cpu = 'cpu'

if sys.platform == 'darwin':
	g_os = 'MacOSX'
else:
	g_os = 'Linux'

# end system detection ---------------------------

# default settings -------------------------------

CC = 'gcc'
CXX = 'g++'
JOBS = '1'
BUILD = 'release'
BASEFLAGS = ''
MACOSX_TARGET_ARCH = 'i386'

# end default settings ---------------------------

# command line settings --------------------------

for k in ARGUMENTS.keys():
	exec_cmd = k + '=\'' + ARGUMENTS[k] + '\''
	print 'Command line: ' + exec_cmd
	exec( exec_cmd )

# end command line settings ----------------------

# general configuration, target selection --------

g_build = './build/' + BUILD

SConsignFile( 'scons.signatures' )
Decider('MD5-timestamp')

SetOption('num_jobs', JOBS)

LINK = CXX

# common flags
# BASE + CORE + OPT for engine
# BASE + GAME + OPT for game
# _noopt versions of the environements are built without the OPT

BASECPPFLAGS = [ ]
CORECPPPATH = [ ]
CORELIBPATH = [ ]
CORECPPFLAGS = [ ]
BASELINKFLAGS = [ ]

# for release build, further optimisations that may not work on all files
OPTCPPFLAGS = [ ]

BASECPPFLAGS.append( BASEFLAGS )
BASECPPFLAGS.append( '-pipe' )
# warn all
BASECPPFLAGS.append( '-Wall' )
# Use C++11 features
BASECPPFLAGS.append( '-std=c++11' )

# Don't throw warnings for unknown pragmas (used by VC++)
BASECPPFLAGS.append('-Wno-unknown-pragmas')

# this define is necessary to make sure threading support is enabled in X
CORECPPFLAGS.append( '-DXTHREADS' )

# don't wrap gcc messages
BASECPPFLAGS.append( '-fmessage-length=0' )

if ( g_os == 'Linux' or g_os == 'MacOSX' ):
	# get the 64 bit machines on the distcc array to produce 32 bit binaries :)
	BASECPPFLAGS.append( '-m32' )
	BASELINKFLAGS.append( '-m32' )

	if g_os == 'Linux':
		# help 64 bit machines to find the compatibility 32bit libraries
		BASELINKFLAGS.append( '-L/lib32' )
		BASELINKFLAGS.append( '-L/usr/lib32' )
		BASELINKFLAGS.append( '-pthread' )
		BASELINKFLAGS.append( '-lrt' )
	
		# Add the __linux__ define
		BASECPPFLAGS.append('-D__linux__')
	else:
		# Mac OS X
		BASECPPFLAGS.append('-DMACOS_X')

		if MACOSX_TARGET_ARCH == 'i386':
			# Perform an Intel build
			BASECPPFLAGS.append(['-arch', 'i386', '-D__i386__'])
			BASELINKFLAGS.append(['-arch', 'i386'])
		elif MACOSX_TARGET_ARCH == 'ppc':
			# Perform a PowerPC build
			BASECPPFLAGS.append(['-arch', 'ppc', '-D__ppc__'])
			BASELINKFLAGS.append(['-arch', 'ppc'])

if ( BUILD == 'debug' ):
	OPTCPPFLAGS = [ '-g', '-O1', '-D_DEBUG' ]
elif ( BUILD == 'release' ):
	# -fomit-frame-pointer: "-O also turns on -fomit-frame-pointer on machines where doing so does not interfere with debugging."
	#   on x86 have to set it explicitely
	# -finline-functions: implicit at -O3
	# -fschedule-insns2: implicit at -O2
	# no-unsafe-math-optimizations: that should be on by default really. hit some wonko bugs in physics code because of that
	OPTCPPFLAGS = [ '-O3', '-ffast-math', '-fno-unsafe-math-optimizations', '-fomit-frame-pointer' ]
else:
	print 'Unknown build configuration ' + BUILD
	sys.exit(0)

# create the build environements
g_base_env = Environment( ENV = os.environ, CC = CC, CXX = CXX, LINK = LINK, CPPFLAGS = BASECPPFLAGS, LINKFLAGS = BASELINKFLAGS, CPPPATH = CORECPPPATH, LIBPATH = CORELIBPATH )

g_base_env.Append(CPPPATH = '#/')
g_base_env.Append(CPPPATH = '#/../include/zlib')

g_env = g_base_env.Clone()

g_env['CPPFLAGS'] += OPTCPPFLAGS
g_env.Append( CPPFLAGS = '-fno-strict-aliasing' )
g_env['CPPFLAGS'] += CORECPPFLAGS

minizip_list = []
libtdm_update_list = []

# mark the globals
GLOBALS = 'g_env g_os OPTCPPFLAGS minizip_list libtdm_update_list'

# end general configuration ----------------------

# targets ----------------------------------------

Export( 'GLOBALS ' + GLOBALS )

VariantDir( g_build, '.', duplicate = 0 )

Export( 'GLOBALS ' + GLOBALS )

# Build the updater
SConscript('SConscript.tdm_update')

# end targets ------------------------------------