Help("""

Targets:

    all              - build everything,

    libs             - build all libraries

    demos            - build all demos

    models           - download/prepare all models

    docs             - compile doxygen documentation

    libs = (static-lib, python-module)

    static-lib       - ray tracer library to link with

    python-module    - ray tracer module for Python

    demos = (python-demos, cc-demos)

    python-demos     - Python demos, this depends on python-module

    cc-demos         - C++ demos

    models = (local-models, download-models)

    local-models     - prepare local models

    download-models  - download models which are not locally available

    no-docs = (libs, demos, models)

                     - everything but docs

    no-download = (libs, demos, local-models)

                     - everything but docs and downloadable models

Default target is no-download.

Options:

""")

import os, sys

Decider('MD5-timestamp')

opt.AddOptions(

	BoolOption('simd', 'allow SSE intrinsics', True),

	('precision', 'floating point number precision (single/double)', "single"),

	('flags', 'add additional compiler flags', ""),

	BoolOption('force_flags', "use only flags specified by 'flags' option (do not autodetect arch/sse flags)", False),

	BoolOption('profile', "enable gcc's profiling support (-pg)", False),

)

if env['PLATFORM'] == 'win32':

	opt.AddOptions(

		('pythonpath', 'path to Python installation',

			'C:\\Python%c%c' % (sys.version[0], sys.version[2])),

opt.Update(env)

Help(opt.GenerateHelpText(env))

### configure

platform = 'unknown'

def CheckPlatform(context):

	global platform

	context.Message('Platform is... ')

	if sys.platform[:5] == 'linux':

		platform = 'linux'

	elif env['PLATFORM'] == 'posix':

		platform = 'posix'

	elif env['PLATFORM'] == 'win32':

		platform = 'win32'

	context.Result(platform)

	return True

def CheckIntelC(context):

	global intelc, intelcversion

	intelc = Tool("intelc").exists(env) == True

	if intelc:

		testenv = Environment()

		Tool("intelc").generate(testenv)

		intelcversion = str(testenv['INTEL_C_COMPILER_VERSION']/10.)

		context.Result(intelcversion)

	else:

		intelcversion = ''

		context.Result(intelc)

	return intelc

def CheckGCC(context):

	global gcc, gccversion

	gcc = "g++" in env['TOOLS']

	if gcc:

		gccversion = env['CCVERSION']

		context.Result(gccversion)

	else:

		gccversion = ''

		context.Result(False)

	return gcc

def CheckCPUFlags(context):

	global cpu, cpuflags_gcc, cpuflags_intelc

	context.Message('Checking CPU arch and flags... ')

	env.Execute('@$CC tools/cpuflags.c -o tools/cpuflags')

	(cpu, cpuflags_gcc, cpuflags_intelc) = os.popen('tools'+os.sep+'cpuflags %s %s'

		% (''.join(gccversion.rsplit('.',1)), intelcversion) ).read().split('\n')[:3]

	context.Result(cpu)

	return True

	custom_tests = {

		'CheckPlatform' : CheckPlatform, 'CheckCPUFlags' : CheckCPUFlags,

conf.CheckPlatform()

conf.CheckGCC()

	cc = 'intelc'

elif gcc:

	cc = 'gcc'

add_flags = ''

if cc == 'gcc':

	add_flags += cpuflags_gcc + ' -ffast-math '

if cc == 'intelc':

	add_flags += cpuflags_intelc + ' '

if conf.env['force_flags']:

	add_flags = conf.env['flags'] + ' '

else:

	add_flags += conf.env['flags'] + ' '

if conf.env['precision'] == 'double':

elif cc == 'gcc':

	add_flags += '-fsingle-precision-constant '

if cc == 'intelc':

	conf.env.Append(CCFLAGS="-O3 -w1 " + add_flags)

elif cc == 'gcc':

	conf.env.Append(CCFLAGS="-O3 -Wall -pipe " + add_flags)

else:

	print "No supported compiler found."

	Exit(1)

print "Using compiler: " + cc

print "Additional flags: " + add_flags

	print 'Error: Cannot build without pthread.'

	Exit(1)

if conf.env['profile'] and cc == 'gcc':

	conf.env.Append(CCFLAGS="-pg", LINKFLAGS="-pg")

env = conf.Finish()

### build targets

SConscript('demos/SConscript', exports='pymodule')

SConscript('models/SConscript')

env.Alias('libs', ['static-lib', 'python-module'])

env.Alias('docs', Command('docs/html', [], 'doxygen'))

env.Clean('docs', ['docs/html'])

env.Alias('no-docs', ['libs', 'demos', 'models'])

env.Alias('no-download', ['libs', 'demos', 'local-models'])

env.Alias('all', ['no-docs', 'docs'])

env.Alias('pyrit', 'no-download')

Default('pyrit')