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Add SCons-based build system.
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‎SConscript‎

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# -*- python -*-
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Import("env")
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env.Append(CPPPATH = "#/include",CPPDEFINES = ["BOOST_ALL_NO_LIB=1"])
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env.AppendUnique(CPPDEFINES = ["${LINK_DYNAMIC and 'BOOST_PYTHON_DYN_LINK=1' or []}"])
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for variant in env["variant"]:
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env["current_variant"] = variant
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env.SetProperty(profile = False)
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if variant == "release":
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env.SetProperty(optimize = "speed", debug = False)
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elif variant == "debug":
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env.SetProperty(optimize = "no", debug = True)
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elif variant == "profile":
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env.SetProperty(optimize = "speed", profile = True, debug = True)
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for linking in env["link"]:
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env["linking"] = linking
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if linking == "dynamic":
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env["LINK_DYNAMIC"] = True
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else:
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env["LINK_DYNAMIC"] = False
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for threading in env["threading"]:
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env["current_threading"] = threading
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env.SetProperty(threading = threading)
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variant_dir=env.subst("$BOOST_CURRENT_VARIANT_DIR")
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env.SConscript("src/SConscript", variant_dir=variant_dir + '/src',
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exports = { "env" : env.Clone(BOOST_LIB = 'python') })
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if GetOption("test"):
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test_env = env.Clone(BOOST_LIB = 'python', BOOST_TEST = True)
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test_env.BoostUseLib('python')
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env.SConscript("test/SConscript", variant_dir=variant_dir + '/test',
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exports = { "env" : test_env })

‎SConstruct‎

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# -*- python -*-
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#
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# Copyright (c) 2016 Stefan Seefeld
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# All rights reserved.
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#
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# Distributed under the Boost Software License, Version 1.0.
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# (See accompanying file LICENSE_1_0.txt or copy at
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# http://www.boost.org/LICENSE_1_0.txt)
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import SCons.Script.Main
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import config
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import config.ui
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import platform
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import os
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#
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# We try to mimic the typical autotools-workflow.
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#
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# * In a 'configure' step all the essential build parameters are established
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# (either by explicit command-line arguments or from configure checks)
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# * A subsequent build step can then simply read the cached variables, so
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# users don't have to memorize and re-issue the arguments on each subsequent
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# invocation, and neither do the config checks need to be re-run.
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#
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# The essential part here is to define a 'config' target, which removes any
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# caches that may still be lingering around, then runs the checks.
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if 'config' in COMMAND_LINE_TARGETS:
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# Clear the cache
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try: os.remove('bin.SCons/config.py')
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except: pass
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if not os.path.exists('bin.SCons/'):
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os.mkdir('bin.SCons/')
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vars = Variables('bin.SCons/config.py', ARGUMENTS)
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config.add_options(vars)
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arch = ARGUMENTS.get('arch', platform.machine())
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env = Environment(toolpath=['config/tools'],
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tools=['default', 'libs', 'tests'],
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variables=vars,
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TARGET_ARCH=arch)
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Help(config.ui.help(vars, env) + """
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Variables are saved in bin.SCons/config.py and persist between scons invocations.
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""")
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if GetOption('help'):
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Return()
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build_dir = config.prepare_build_dir(env)
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config_log = '{}/config.log'.format(build_dir)
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# configure
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SConsignFile('{}/.sconsign'.format(build_dir))
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#env.Decider('MD5-timestamp')
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env.Decider('timestamp-newer')
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checks = config.get_checks()
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if 'config' in COMMAND_LINE_TARGETS:
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conf=env.Configure(custom_tests=checks, log_file=config_log, conf_dir=build_dir)
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if False in (getattr(conf, c)() for c in checks):
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Exit(1)
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env = conf.Finish()
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vars.Save('bin.SCons/config.py', env)
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if not os.path.exists(config_log):
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print('Please run `scons config` first. (See `scons -h` for available options.)')
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Exit(1)
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if not GetOption('verbose'):
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config.ui.pretty_output(env)
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# build
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env['BPL_VERSION'] = '1.61'
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for e in config.variants(env):
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variant_dir=e.subst("$BOOST_CURRENT_VARIANT_DIR")
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e.SConscript('src/SConscript', variant_dir=variant_dir + '/src',
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exports = { 'env' : e.Clone(BOOST_LIB = 'python') })
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if 'test' in COMMAND_LINE_TARGETS:
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test_env = e.Clone(BOOST_LIB = 'python', BOOST_TEST = True)
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test_env.BoostUseLib('python')
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e.SConscript('test/SConscript', variant_dir=variant_dir + '/test',
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exports = { 'env' : test_env })

‎config/__init__.py‎

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#
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# Copyright (c) 2016 Stefan Seefeld
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# All rights reserved.
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#
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# Distributed under the Boost Software License, Version 1.0.
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# (See accompanying file LICENSE_1_0.txt or copy at
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# http://www.boost.org/LICENSE_1_0.txt)
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from SCons.Variables import *
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from SCons.Script import AddOption
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from collections import OrderedDict
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import platform
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from . import ui
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from . import python
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from . import boost
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def add_options(vars):
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ui.add_option('-V', '--verbose', dest='verbose', action='store_true', help='verbose mode: print full commands.')
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python.add_options(vars)
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boost.add_options(vars)
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vars.Add('CPPPATH', converter=lambda v:v.split())
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vars.Add('CCFLAGS', converter=lambda v:v.split())
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vars.Add('LIBPATH', converter=lambda v:v.split())
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vars.Add('LIBS', converter=lambda v:v.split())
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vars.Add('PYTHON')
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vars.Add('PYTHONLIBS')
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ui.add_variable(vars, ("arch", "target architeture", platform.machine()))
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ui.add_variable(vars, ("toolchain", "toolchain to use", 'gcc'))
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ui.add_variable(vars, ListVariable("variant", "Build configuration", "release", ["release", "debug", "profile"]))
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ui.add_variable(vars, ListVariable("link", "Library linking", "dynamic", ["static", "dynamic"]))
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ui.add_variable(vars, ListVariable("threading", "Multi-threading support", "multi", ["single", "multi"]))
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ui.add_variable(vars, EnumVariable("layout", "Layout of library names and header locations", "versioned", ["versioned", "system"]))
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ui.add_variable(vars, PathVariable("stagedir", "If --stage is passed install only compiled library files in this location", "stage", PathVariable.PathAccept))
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ui.add_variable(vars, PathVariable("prefix", "Install prefix", "/usr/local", PathVariable.PathAccept))
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def get_checks():
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checks = OrderedDict()
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checks['python'] = python.check
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checks['boost'] = boost.check
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return checks
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def set_property(env, **kw):
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from toolchains.gcc import features as gcc_features
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from toolchains.msvc import features as msvc_features
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if 'gcc' in env['TOOLS']: features = gcc_features
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elif 'msvc' in env['TOOLS']: features = msvc_features
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else: raise Error('unknown toolchain')
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features.init_once(env)
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for (prop,value) in kw.items():
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getattr(features, prop, lambda x, y : None)(env, value)
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env[prop.upper()] = value
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def boost_suffix(env):
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suffix = str()
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if env["layout"] == "versioned":
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if "gcc" in env["TOOLS"]:
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suffix += "-gcc" + "".join(env["CCVERSION"].split(".")[0:2])
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if env["THREADING"] == "multi":
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suffix += "-mt"
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if env["DEBUG"]:
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suffix += "-d"
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if env["layout"] == "versioned":
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suffix += "-" + "_".join(env["BPL_VERSION"].split("."))
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return suffix
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def prepare_build_dir(env):
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vars = {}
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env["boost_suffix"] = boost_suffix
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build_dir="bin.SCons"
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if "gcc" in env["TOOLS"]:
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build_dir+="/gcc-%s"%env["CCVERSION"]
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vars['CXXFLAGS'] = ['-ftemplate-depth-128', '-Wall']
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elif "msvc" in env["TOOLS"]:
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build_dir+="/msvc-%s"%env["MSVS_VERSION"]
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vars['BOOST_BUILD_DIR'] = build_dir
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vars['BOOST_SUFFIX'] = "${boost_suffix(__env__)}"
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env.Replace(**vars)
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return build_dir
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def variants(env):
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env.Append(CPPPATH = "#/include", CPPDEFINES = ["BOOST_ALL_NO_LIB=1"])
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set_property(env, architecture = env['TARGET_ARCH'])
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for variant in env["variant"]:
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e = env.Clone()
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e["current_variant"] = variant
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set_property(env, profile = False)
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if variant == "release":
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set_property(e, optimize = "speed", debug = False)
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elif variant == "debug":
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set_property(e, optimize = "no", debug = True)
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elif variant == "profile":
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set_property(e, optimize = "speed", profile = True, debug = True)
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for linking in env["link"]:
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e["linking"] = linking
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if linking == "dynamic":
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e["LINK_DYNAMIC"] = True
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else:
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e["LINK_DYNAMIC"] = False
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for threading in e["threading"]:
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e["current_threading"] = threading
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set_property(e, threading = threading)
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yield e

‎config/boost.py‎

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#
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# Copyright (c) 2016 Stefan Seefeld
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# All rights reserved.
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#
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# Distributed under the Boost Software License, Version 1.0.
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# (See accompanying file LICENSE_1_0.txt or copy at
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# http://www.boost.org/LICENSE_1_0.txt)
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from . import ui
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import os
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def add_options(vars):
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ui.add_option("--boost-prefix", dest="boost_prefix", type="string", nargs=1, action="store",
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metavar="DIR", default=os.environ.get("BOOST_DIR"),
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help="prefix for Boost libraries; should have 'include' and 'lib' subdirectories, 'boost' and 'stage\\lib' subdirectories on Windows")
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ui.add_option("--boost-include", dest="boost_include", type="string", nargs=1, action="store",
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metavar="DIR", help="location of Boost header files")
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def check(context):
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boost_source_file = r"#include <boost/config.hpp>"
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context.Message('Checking for Boost...')
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boost_prefix = context.env.GetOption('boost_prefix')
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boost_include = context.env.GetOption('boost_include')
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incpath=None
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if boost_include:
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incpath=boost_include
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elif boost_prefix:
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incpath=boost_prefix
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if incpath:
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context.env.AppendUnique(CPPPATH=[incpath])
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if not context.TryCompile(boost_source_file, '.cpp'):
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context.Result(0)
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return False
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context.Result(1)
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return True

‎config/python.py‎

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#
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# Copyright (c) 2016 Stefan Seefeld
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# All rights reserved.
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#
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# Distributed under the Boost Software License, Version 1.0.
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# (See accompanying file LICENSE_1_0.txt or copy at
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# http://www.boost.org/LICENSE_1_0.txt)
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from . import ui
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def add_options(vars):
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ui.add_option('--python', help='the python executable')
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def check(context):
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python_source_file = r"""
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// If defined, enforces linking againg PythonXXd.lib, which
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// is usually not included in Python environments.
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#undef _DEBUG
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#include "Python.h"
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int main()
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{
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Py_Initialize();
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Py_Finalize();
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return 0;
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}
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"""
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import platform
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import subprocess
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import re, os
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def check_python(cmd):
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return subprocess.check_output([python, '-c', cmd]).strip()
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def check_sysconfig(cmd):
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r = check_python('import distutils.sysconfig as c; print(c.%s)'%cmd)
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return r if r != 'None' else ''
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context.Message('Checking for Python...')
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python = context.env.GetOption('python') or 'python'
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context.env['PYTHON'] = python
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incpath = check_sysconfig('get_python_inc()')
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context.env.AppendUnique(CPPPATH=[incpath])
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if platform.system() == 'Windows':
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version = check_python('import sys; print("%d%d"%sys.version_info[0:2])')
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prefix = check_python('import sys; print(sys.prefix)')
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libfile = os.path.join(prefix, 'libs', 'python%s.lib'%version)
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libpath = os.path.join(prefix, 'libs')
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lib = 'python%s'%version
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context.env.AppendUnique(LIBS=[lib])
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else:
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libpath = check_sysconfig('get_config_var("LIBDIR")')
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libfile = check_sysconfig('get_config_var("LIBRARY")')
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match = re.search('(python.*)\.(a|so|dylib)', libfile)
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lib = None
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if match:
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lib = match.group(1)
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context.env.AppendUnique(PYTHONLIBS=[lib])
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if match.group(2) == 'a':
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flags = check_sysconfig('get_config_var("LINKFORSHARED")')
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if flags is not None:
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context.env.AppendUnique(LINKFLAGS=flags.split())
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context.env.AppendUnique(LIBPATH=[libpath])
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oldlibs = context.AppendLIBS([lib])
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flags = check_sysconfig('get_config_var("MODLIBS")')
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flags += ' ' + check_sysconfig('get_config_var("SHLIBS")')
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flags = [f[2:] for f in flags.strip().split() if f.startswith('-l')]
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if flags:
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context.AppendLIBS([flags])
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result = context.TryLink(python_source_file,'.cpp')
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if not result and context.env['PLATFORM'] == 'darwin':
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# Sometimes we need some extra stuff on Mac OS
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frameworkDir = libpath # search up the libDir tree for the proper home for frameworks
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while frameworkDir and frameworkDir != "/":
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frameworkDir, d2 = os.path.split(frameworkDir)
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if d2 == "Python.framework":
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if not "Python" in os.listdir(os.path.join(frameworkDir, d2)):
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context.Result(0)
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print((
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"Expected to find Python in framework directory %s, but it isn't there"
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% frameworkDir))
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return False
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break
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context.env.AppendUnique(LINKFLAGS="-F%s" % frameworkDir)
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result = context.TryLink(python_source_file,'.cpp')
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if not result:
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context.Result(0)
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print("Cannot link program with Python.")
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return False
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if context.env['PLATFORM'] == 'darwin':
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context.env['LDMODULESUFFIX'] = '.so'
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context.Result(1)
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context.SetLIBS(oldlibs)
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context.env.AppendUnique(PYTHONLIBS=[lib] + flags)
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return True

‎config/toolchains/__init__.py‎

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#
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# Copyright (c) 2016 Stefan Seefeld
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# All rights reserved.
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#
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# Distributed under the Boost Software License, Version 1.0.
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# (See accompanying file LICENSE_1_0.txt or copy at
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# http://www.boost.org/LICENSE_1_0.txt)
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import traceback
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def append_feature_flag(env, **kw):
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stack = traceback.extract_stack(limit = 3)
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feature = stack[0][2].upper()
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for (key, val) in kw.items():
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feature_var = feature + "_" + key
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env.AppendUnique(**{ key : "$" + feature_var })
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env[feature_var] = val
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