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SConstruct
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SConstruct
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# -*- mode: python; -*-
import copy
import datetime
import errno
import json
import os
import re
import shlex
import shutil
import stat
import sys
import textwrap
import uuid
from buildscripts import utils
from buildscripts import moduleconfig
from mongo_scons_utils import (
default_buildinfo_environment_data,
default_variant_dir_generator,
get_toolchain_ver,
)
import libdeps
EnsureSConsVersion( 2, 3, 0 )
def versiontuple(v):
return tuple(map(int, (v.split("."))))
# --- OS identification ---
#
# This needs to precede the options section so that we can only offer some options on certain
# operating systems.
# This function gets the running OS as identified by Python
# It should only be used to set up defaults for options/variables, because
# its value could potentially be overridden by setting TARGET_OS on the
# command-line. Treat this output as the value of HOST_OS
def get_running_os_name():
running_os = os.sys.platform
if running_os.startswith('linux'):
running_os = 'linux'
elif running_os.startswith('freebsd'):
running_os = 'freebsd'
elif running_os.startswith('openbsd'):
running_os = 'openbsd'
elif running_os == 'sunos5':
running_os = 'solaris'
elif running_os == 'win32':
running_os = 'windows'
elif running_os == 'darwin':
running_os = 'osx'
else:
running_os = 'unknown'
return running_os
def env_get_os_name_wrapper(self):
return env['TARGET_OS']
def is_os_raw(target_os, os_list_to_check):
okay = False
posix_os_list = [ 'linux', 'openbsd', 'freebsd', 'osx', 'solaris' ]
for p in os_list_to_check:
if p == 'posix' and target_os in posix_os_list:
okay = True
break
elif p == target_os:
okay = True
break
return okay
# This function tests the running OS as identified by Python
# It should only be used to set up defaults for options/variables, because
# its value could potentially be overridden by setting TARGET_OS on the
# command-line. Treat this output as the value of HOST_OS
def is_running_os(*os_list):
return is_os_raw(get_running_os_name(), os_list)
def env_os_is_wrapper(self, *os_list):
return is_os_raw(self['TARGET_OS'], os_list)
def add_option(name, **kwargs):
if 'dest' not in kwargs:
kwargs['dest'] = name
if 'metavar' not in kwargs and kwargs.get('type', None) == 'choice':
kwargs['metavar'] = '[' + '|'.join(kwargs['choices']) + ']'
AddOption('--' + name, **kwargs)
def get_option(name):
return GetOption(name)
def has_option(name):
optval = GetOption(name)
# Options with nargs=0 are true when their value is the empty tuple. Otherwise,
# if the value is falsish (empty string, None, etc.), coerce to False.
return True if optval == () else bool(optval)
def use_system_version_of_library(name):
return has_option('use-system-all') or has_option('use-system-' + name)
# Returns true if we have been configured to use a system version of any C++ library. If you
# add a new C++ library dependency that may be shimmed out to the system, add it to the below
# list.
def using_system_version_of_cxx_libraries():
cxx_library_names = ["tcmalloc", "boost"]
return True in [use_system_version_of_library(x) for x in cxx_library_names]
def make_variant_dir_generator():
memoized_variant_dir = [False]
def generate_variant_dir(target, source, env, for_signature):
if not memoized_variant_dir[0]:
memoized_variant_dir[0] = env.subst('$BUILD_ROOT/$VARIANT_DIR')
return memoized_variant_dir[0]
return generate_variant_dir
# Options TODOs:
#
# - We should either alphabetize the entire list of options, or split them into logical groups
# with clear boundaries, and then alphabetize the groups. There is no way in SCons though to
# inform it of options groups.
#
# - Many of these options are currently only either present or absent. This is not good for
# scripting the build invocation because it means you need to interpolate in the presence of
# the whole option. It is better to make all options take an optional on/off or true/false
# using the nargs='const' mechanism.
#
add_option('mute',
help='do not display commandlines for compiling and linking, to reduce screen noise',
nargs=0,
)
add_option('prefix',
default='$BUILD_ROOT/install',
help='installation prefix',
)
add_option('nostrip',
help='do not strip installed binaries',
nargs=0,
)
add_option('build-dir',
default='#build',
help='build output directory',
)
add_option('release',
help='release build',
nargs=0,
)
add_option('lto',
help='enable link time optimizations (experimental, except with MSVC)',
nargs=0,
)
add_option('dynamic-windows',
help='dynamically link on Windows',
nargs=0,
)
add_option('endian',
choices=['big', 'little', 'auto'],
default='auto',
help='endianness of target platform',
nargs=1,
type='choice',
)
add_option('disable-minimum-compiler-version-enforcement',
help='allow use of unsupported older compilers (NEVER for production builds)',
nargs=0,
)
add_option('ssl',
help='Enable SSL',
nargs=0
)
add_option('mmapv1',
choices=['auto', 'on', 'off'],
default='auto',
help='Enable MMapV1',
nargs='?',
type='choice',
)
add_option('wiredtiger',
choices=['on', 'off'],
const='on',
default='on',
help='Enable wiredtiger',
nargs='?',
type='choice',
)
js_engine_choices = ['mozjs', 'none']
add_option('js-engine',
choices=js_engine_choices,
default=js_engine_choices[0],
help='JavaScript scripting engine implementation',
type='choice',
)
add_option('server-js',
choices=['on', 'off'],
const='on',
default='on',
help='Build mongod without JavaScript support',
type='choice',
)
add_option('libc++',
help='use libc++ (experimental, requires clang)',
nargs=0,
)
add_option('use-glibcxx-debug',
help='Enable the glibc++ debug implementations of the C++ standard libary',
nargs=0,
)
add_option('noshell',
help="don't build shell",
nargs=0,
)
add_option('safeshell',
help="don't let shell scripts run programs (still, don't run untrusted scripts)",
nargs=0,
)
add_option('dbg',
choices=['on', 'off'],
const='on',
default='off',
help='Enable runtime debugging checks',
nargs='?',
type='choice',
)
add_option('opt',
choices=['on', 'off'],
const='on',
help='Enable compile-time optimization',
nargs='?',
type='choice',
)
add_option('sanitize',
help='enable selected sanitizers',
metavar='san1,san2,...sanN',
)
add_option('llvm-symbolizer',
default='llvm-symbolizer',
help='name of (or path to) the LLVM symbolizer',
)
add_option('durableDefaultOn',
help='have durable default to on',
nargs=0,
)
add_option('allocator',
choices=["auto", "system", "tcmalloc"],
default="auto",
help='allocator to use (use "auto" for best choice for current platform)',
type='choice',
)
add_option('gdbserver',
help='build in gdb server support',
nargs=0,
)
add_option('gcov',
help='compile with flags for gcov',
nargs=0,
)
add_option('smokedbprefix',
help='prefix to dbpath et al. for smoke tests',
)
add_option('smokeauth',
help='run smoke tests with --auth',
nargs=0,
)
add_option('use-sasl-client',
help='Support SASL authentication in the client library',
nargs=0,
)
add_option('use-system-tcmalloc',
help='use system version of tcmalloc library',
nargs=0,
)
add_option('use-system-pcre',
help='use system version of pcre library',
nargs=0,
)
add_option('use-system-wiredtiger',
help='use system version of wiredtiger library',
nargs=0,
)
add_option('system-boost-lib-search-suffixes',
help='Comma delimited sequence of boost library suffixes to search',
)
add_option('use-system-boost',
help='use system version of boost libraries',
nargs=0,
)
add_option('use-system-snappy',
help='use system version of snappy library',
nargs=0,
)
add_option('use-system-valgrind',
help='use system version of valgrind library',
nargs=0,
)
add_option('use-system-zlib',
help='use system version of zlib library',
nargs=0,
)
add_option('use-system-stemmer',
help='use system version of stemmer',
nargs=0)
add_option('use-system-yaml',
help='use system version of yaml',
nargs=0,
)
add_option('use-system-asio',
help="use system version of ASIO",
nargs=0,
)
add_option('icu',
choices=['on', 'off'],
const='on',
default='off',
help='Enable ICU',
nargs='?',
type='choice',
)
add_option('use-system-icu',
help="use system version of ICU",
nargs=0,
)
add_option('use-system-intel_decimal128',
help='use system version of intel decimal128',
nargs=0,
)
add_option('use-system-all',
help='use all system libraries',
nargs=0,
)
add_option('use-new-tools',
help='put new tools in the tarball',
nargs=0,
)
add_option('use-cpu-profiler',
help='Link against the google-perftools profiler library',
nargs=0,
)
add_option('build-fast-and-loose',
choices=['on', 'off'],
const='on',
default='on',
help='looser dependency checking, ignored for --release builds',
nargs='?',
type='choice',
)
add_option('disable-warnings-as-errors',
help="Don't add -Werror to compiler command line",
nargs=0,
)
add_option('variables-help',
help='Print the help text for SCons variables',
nargs=0,
)
add_option('osx-version-min',
help='minimum OS X version to support',
)
win_version_min_choices = {
'vista' : ('0600', '0000'),
'win7' : ('0601', '0000'),
'ws08r2' : ('0601', '0000'),
'win8' : ('0602', '0000'),
'win81' : ('0603', '0000'),
}
add_option('win-version-min',
choices=win_version_min_choices.keys(),
default=None,
help='minimum Windows version to support',
type='choice',
)
add_option('cache',
help='Use an object cache rather than a per-build variant directory (experimental)',
nargs=0,
)
add_option('cache-dir',
default='$BUILD_ROOT/scons/cache',
help='Specify the directory to use for caching objects if --cache is in use',
)
add_option("experimental-decimal-support",
choices=['on', 'off'],
default='off',
const='on',
help="Enable experimental decimal128 type support",
nargs='?',
)
def find_mongo_custom_variables():
files = []
for path in sys.path:
probe = os.path.join(path, 'mongo_custom_variables.py')
if os.path.isfile(probe):
if not has_option('mute'):
print "Using mongo variable customization file {0}".format(probe)
files.append(probe)
return files
add_option('variables-files',
default=find_mongo_custom_variables(),
help="Specify variables files to load",
)
link_model_choices = ['auto', 'object', 'static', 'dynamic', 'dynamic-strict']
add_option('link-model',
choices=link_model_choices,
default='object',
help='Select the linking model for the project',
type='choice'
)
variable_parse_mode_choices=['auto', 'posix', 'other']
add_option('variable-parse-mode',
choices=variable_parse_mode_choices,
default=variable_parse_mode_choices[0],
help='Select which parsing mode is used to interpret command line variables',
type='choice',
)
add_option('modules',
help="Comma-separated list of modules to build. Empty means none. Default is all.",
)
try:
with open("version.json", "r") as version_fp:
version_data = json.load(version_fp)
if 'version' not in version_data:
print "version.json does not contain a version string"
Exit(1)
if 'githash' not in version_data:
version_data['githash'] = utils.getGitVersion()
except IOError as e:
# If the file error wasn't because the file is missing, error out
if e.errno != errno.ENOENT:
print "Error opening version.json: {0}".format(e.strerror)
Exit(1)
version_data = {
'version': utils.getGitDescribe()[1:],
'githash': utils.getGitVersion(),
}
except ValueError as e:
print "Error decoding version.json: {0}".format(e)
Exit(1)
# Setup the command-line variables
def variable_shlex_converter(val):
# If the argument is something other than a string, propogate
# it literally.
if not isinstance(val, basestring):
return val
parse_mode = get_option('variable-parse-mode')
if parse_mode == 'auto':
parse_mode = 'other' if is_running_os('windows') else 'posix'
return shlex.split(val, posix=(parse_mode == 'posix'))
def variable_arch_converter(val):
arches = {
'x86_64': 'x86_64',
'amd64': 'x86_64',
'emt64': 'x86_64',
'x86': 'i386',
}
val = val.lower()
if val in arches:
return arches[val]
# Uname returns a bunch of possible x86's on Linux.
# Check whether the value is an i[3456]86 processor.
if re.match(r'^i[3-6]86$', val):
return 'i386'
# Return whatever val is passed in - hopefully it's legit
return val
# The Scons 'default' tool enables a lot of tools that we don't actually need to enable.
# On platforms like Solaris, it actually does the wrong thing by enabling the sunstudio
# toolchain first. As such it is simpler and more efficient to manually load the precise
# set of tools we need for each platform.
# If we aren't on a platform where we know the minimal set of tools, we fall back to loading
# the 'default' tool.
def decide_platform_tools():
if is_running_os('windows'):
# we only support MS toolchain on windows
return ['msvc', 'mslink', 'mslib']
elif is_running_os('linux', 'solaris'):
return ['gcc', 'g++', 'gnulink', 'ar']
elif is_running_os('osx'):
return ['gcc', 'g++', 'applelink', 'ar']
else:
return ["default"]
def variable_tools_converter(val):
tool_list = shlex.split(val)
return tool_list + [
"distsrc",
"gziptool",
"jsheader",
"mergelib",
"mongo_integrationtest",
"mongo_unittest",
"textfile",
]
def variable_distsrc_converter(val):
if not val.endswith("/"):
return val + "/"
return val
env_vars = Variables(
files=variable_shlex_converter(get_option('variables-files')),
args=ARGUMENTS
)
env_vars.Add('ABIDW',
help="Configures the path to the 'abidw' (a libabigail) utility")
env_vars.Add('ARFLAGS',
help='Sets flags for the archiver',
converter=variable_shlex_converter)
env_vars.Add('CC',
help='Select the C compiler to use')
env_vars.Add('CCFLAGS',
help='Sets flags for the C and C++ compiler',
converter=variable_shlex_converter)
env_vars.Add('CFLAGS',
help='Sets flags for the C compiler',
converter=variable_shlex_converter)
env_vars.Add('CPPDEFINES',
help='Sets pre-processor definitions for C and C++',
converter=variable_shlex_converter,
default=[])
env_vars.Add('CPPPATH',
help='Adds paths to the preprocessor search path',
converter=variable_shlex_converter)
env_vars.Add('CXX',
help='Select the C++ compiler to use')
env_vars.Add('CXXFLAGS',
help='Sets flags for the C++ compiler',
converter=variable_shlex_converter)
# Note: This probably is only really meaningful when configured via a variables file. It will
# also override whatever the SCons platform defaults would be.
env_vars.Add('ENV',
help='Sets the environment for subprocesses')
env_vars.Add('HOST_ARCH',
help='Sets the native architecture of the compiler',
converter=variable_arch_converter,
default=None)
env_vars.Add('LIBPATH',
help='Adds paths to the linker search path',
converter=variable_shlex_converter)
env_vars.Add('LIBS',
help='Adds extra libraries to link against',
converter=variable_shlex_converter)
env_vars.Add('LINKFLAGS',
help='Sets flags for the linker',
converter=variable_shlex_converter)
# Note: This is only really meaningful when configured via a variables file. See the
# default_buildinfo_environment_data() function for examples of how to use this.
env_vars.Add('MONGO_BUILDINFO_ENVIRONMENT_DATA',
help='Sets the info returned from the buildInfo command and --version command-line flag',
default=default_buildinfo_environment_data())
env_vars.Add('MONGO_DIST_SRC_PREFIX',
help='Sets the prefix for files in the source distribution archive',
converter=variable_distsrc_converter,
default="mongodb-src-r${MONGO_VERSION}")
env_vars.Add('MONGO_DISTARCH',
help='Adds a string representing the target processor architecture to the dist archive',
default='$TARGET_ARCH')
env_vars.Add('MONGO_DISTMOD',
help='Adds a string that will be embedded in the dist archive naming',
default='')
env_vars.Add('MONGO_DISTNAME',
help='Sets the version string to be used in dist archive naming',
default='$MONGO_VERSION')
env_vars.Add('MONGO_VERSION',
help='Sets the version string for MongoDB',
default=version_data['version'])
env_vars.Add('MONGO_GIT_HASH',
help='Sets the githash to store in the MongoDB version information',
default=version_data['githash'])
env_vars.Add('MSVC_USE_SCRIPT',
help='Sets the script used to setup Visual Studio.')
env_vars.Add('MSVC_VERSION',
help='Sets the version of Visual Studio to use (e.g. 12.0, 11.0, 10.0)')
env_vars.Add('OBJCOPY',
help='Sets the path to objcopy',
default=WhereIs('objcopy'))
env_vars.Add('RPATH',
help='Set the RPATH for dynamic libraries and executables',
converter=variable_shlex_converter)
env_vars.Add('SHCCFLAGS',
help='Sets flags for the C and C++ compiler when building shared libraries',
converter=variable_shlex_converter)
env_vars.Add('SHCFLAGS',
help='Sets flags for the C compiler when building shared libraries',
converter=variable_shlex_converter)
env_vars.Add('SHCXXFLAGS',
help='Sets flags for the C++ compiler when building shared libraries',
converter=variable_shlex_converter)
env_vars.Add('SHLINKFLAGS',
help='Sets flags for the linker when building shared libraries',
converter=variable_shlex_converter)
env_vars.Add('TARGET_ARCH',
help='Sets the architecture to build for',
converter=variable_arch_converter,
default=None)
env_vars.Add('TARGET_OS',
help='Sets the target OS to build for',
default=get_running_os_name())
env_vars.Add('TOOLS',
help='Sets the list of SCons tools to add to the environment',
converter=variable_tools_converter,
default=decide_platform_tools())
env_vars.Add('VARIANT_DIR',
help='Sets the name (or generator function) for the variant directory',
default=default_variant_dir_generator,
)
# don't run configure if user calls --help
if GetOption('help'):
Return()
# -- Validate user provided options --
# A dummy environment that should *only* have the variables we have set. In practice it has
# some other things because SCons isn't quite perfect about keeping variable initialization
# scoped to Tools, but it should be good enough to do validation on any Variable values that
# came from the command line or from loaded files.
variables_only_env = Environment(
# Disable platform specific variable injection
platform=(lambda x: ()),
# But do *not* load any tools, since those might actually set variables. Note that this
# causes the value of our TOOLS variable to have no effect.
tools=[],
# Use the Variables specified above.
variables=env_vars,
)
if ('CC' in variables_only_env) != ('CXX' in variables_only_env):
print('Cannot customize C compiler without customizing C++ compiler, and vice versa')
Exit(1)
# --- environment setup ---
# If the user isn't using the # to indicate top-of-tree or $ to expand a variable, forbid
# relative paths. Relative paths don't really work as expected, because they end up relative to
# the top level SConstruct, not the invokers CWD. We could in theory fix this with
# GetLaunchDir, but that seems a step too far.
buildDir = get_option('build-dir').rstrip('/')
if buildDir[0] not in ['$', '#']:
if not os.path.isabs(buildDir):
print("Do not use relative paths with --build-dir")
Exit(1)
cacheDir = get_option('cache-dir').rstrip('/')
if cacheDir[0] not in ['$', '#']:
if not os.path.isabs(cacheDir):
print("Do not use relative paths with --cache-dir")
Exit(1)
installDir = get_option('prefix').rstrip('/')
if installDir[0] not in ['$', '#']:
if not os.path.isabs(installDir):
print("Do not use relative paths with --prefix")
Exit(1)
sconsDataDir = Dir(buildDir).Dir('scons')
SConsignFile(str(sconsDataDir.File('sconsign')))
def printLocalInfo():
import sys, SCons
print( "scons version: " + SCons.__version__ )
print( "python version: " + " ".join( [ `i` for i in sys.version_info ] ) )
printLocalInfo()
boostLibs = [ "thread" , "filesystem" , "program_options", "system", "regex", "chrono" ]
onlyServer = len( COMMAND_LINE_TARGETS ) == 0 or ( len( COMMAND_LINE_TARGETS ) == 1 and str( COMMAND_LINE_TARGETS[0] ) in [ "mongod" , "mongos" , "test" ] )
releaseBuild = has_option("release")
dbg_opt_mapping = {
# --dbg, --opt : dbg opt
( "on", None ) : ( True, False ), # special case interaction
( "on", "on" ) : ( True, True ),
( "on", "off" ) : ( True, False ),
( "off", None ) : ( False, True ),
( "off", "on" ) : ( False, True ),
( "off", "off" ) : ( False, False ),
}
debugBuild, optBuild = dbg_opt_mapping[(get_option('dbg'), get_option('opt'))]
if releaseBuild and (debugBuild or not optBuild):
print("Error: A --release build may not have debugging, and must have optimization")
Exit(1)
noshell = has_option( "noshell" )
jsEngine = get_option( "js-engine")
serverJs = get_option( "server-js" ) == "on"
usemozjs = (jsEngine.startswith('mozjs'))
if not serverJs and not usemozjs:
print("Warning: --server-js=off is not needed with --js-engine=none")
# We defer building the env until we have determined whether we want certain values. Some values
# in the env actually have semantics for 'None' that differ from being absent, so it is better
# to build it up via a dict, and then construct the Environment in one shot with kwargs.
#
# Yes, BUILD_ROOT vs BUILD_DIR is confusing. Ideally, BUILD_DIR would actually be called
# VARIANT_DIR, and at some point we should probably do that renaming. Until we do though, we
# also need an Environment variable for the argument to --build-dir, which is the parent of all
# variant dirs. For now, we call that BUILD_ROOT. If and when we s/BUILD_DIR/VARIANT_DIR/g,
# then also s/BUILD_ROOT/BUILD_DIR/g.
envDict = dict(BUILD_ROOT=buildDir,
BUILD_DIR=make_variant_dir_generator(),
DIST_ARCHIVE_SUFFIX='.tgz',
DIST_BINARIES=[],
MODULE_BANNERS=[],
ARCHIVE_ADDITION_DIR_MAP={},
ARCHIVE_ADDITIONS=[],
PYTHON=utils.find_python(),
SERVER_ARCHIVE='${SERVER_DIST_BASENAME}${DIST_ARCHIVE_SUFFIX}',
UNITTEST_ALIAS='unittests',
# TODO: Move unittests.txt to $BUILD_DIR, but that requires
# changes to MCI.
UNITTEST_LIST='$BUILD_ROOT/unittests.txt',
INTEGRATION_TEST_ALIAS='integration_tests',
INTEGRATION_TEST_LIST='$BUILD_ROOT/integration_tests.txt',
CONFIGUREDIR=sconsDataDir.Dir('sconf_temp'),
CONFIGURELOG=sconsDataDir.File('config.log'),
INSTALL_DIR=installDir,
CONFIG_HEADER_DEFINES={},
LIBDEPS_TAG_EXPANSIONS=[],
)
env = Environment(variables=env_vars, **envDict)
del envDict
env.AddMethod(env_os_is_wrapper, 'TargetOSIs')
env.AddMethod(env_get_os_name_wrapper, 'GetTargetOSName')
def fatal_error(env, msg, *args):
print msg.format(*args)
Exit(1)
def conf_error(env, msg, *args):
print msg.format(*args)
print "See {0} for details".format(env['CONFIGURELOG'].abspath)
Exit(1)
env.AddMethod(fatal_error, 'FatalError')
env.AddMethod(conf_error, 'ConfError')
if has_option('variables-help'):
print env_vars.GenerateHelpText(env)
Exit(0)
unknown_vars = env_vars.UnknownVariables()
if unknown_vars:
env.FatalError("Unknown variables specified: {0}", ", ".join(unknown_vars.keys()))
def set_config_header_define(env, varname, varval = 1):
env['CONFIG_HEADER_DEFINES'][varname] = varval
env.AddMethod(set_config_header_define, 'SetConfigHeaderDefine')
detectEnv = env.Clone()
# Identify the toolchain in use. We currently support the following:
# These macros came from
# http://nadeausoftware.com/articles/2012/10/c_c_tip_how_detect_compiler_name_and_version_using_compiler_predefined_macros
toolchain_macros = {
'GCC': 'defined(__GNUC__) && !defined(__clang__)',
'clang': 'defined(__clang__)',
'MSVC': 'defined(_MSC_VER)'
}
def CheckForToolchain(context, toolchain, lang_name, compiler_var, source_suffix):
test_body = textwrap.dedent("""
#if {0}
/* we are using toolchain {0} */
#else
#error
#endif
""".format(toolchain_macros[toolchain]))
print_tuple = (lang_name, context.env[compiler_var], toolchain)
context.Message('Checking if %s compiler "%s" is %s... ' % print_tuple)
# Strip indentation from the test body to ensure that the newline at the end of the
# endif is the last character in the file (rather than a line of spaces with no
# newline), and that all of the preprocessor directives start at column zero. Both of
# these issues can trip up older toolchains.
result = context.TryCompile(test_body, source_suffix)
context.Result(result)
return result
endian = get_option( "endian" )
if endian == "auto":
endian = sys.byteorder
if endian == "little":
env.SetConfigHeaderDefine("MONGO_CONFIG_BYTE_ORDER", "1234")
elif endian == "big":
env.SetConfigHeaderDefine("MONGO_CONFIG_BYTE_ORDER", "4321")
# These preprocessor macros came from
# http://nadeausoftware.com/articles/2012/02/c_c_tip_how_detect_processor_type_using_compiler_predefined_macros
#
# NOTE: Remember to add a trailing comma to form any required one
# element tuples, or your configure checks will fail in strange ways.
processor_macros = {
'arm' : { 'endian': 'little', 'defines': ('__arm__',) },
'arm64' : { 'endian': 'little', 'defines': ('__arm64__', '__aarch64__')},
'i386' : { 'endian': 'little', 'defines': ('__i386', '_M_IX86')},
'ppc64le': { 'endian': 'little', 'defines': ('__powerpc64__',)},
's390x' : { 'endian': 'big', 'defines': ('__s390x__',)},
'sparc' : { 'endian': 'big', 'defines': ('__sparc',)},
'x86_64' : { 'endian': 'little', 'defines': ('__x86_64', '_M_AMD64')},
}
def CheckForProcessor(context, which_arch):
def run_compile_check(arch):
full_macros = " || ".join([ "defined(%s)" % (v) for v in processor_macros[arch]['defines']])
if not endian == processor_macros[arch]['endian']:
return False
test_body = """
#if {0}
/* Detected {1} */
#else
#error not {1}
#endif
""".format(full_macros, arch)
return context.TryCompile(textwrap.dedent(test_body), ".c")
if which_arch:
ret = run_compile_check(which_arch)
context.Message('Checking if target processor is %s ' % which_arch)
context.Result(ret)
return ret;
for k in processor_macros.keys():
ret = run_compile_check(k)
if ret:
context.Result('Detected a %s processor' % k)
return k
context.Result('Could not detect processor model/architecture')
return False
# Taken from http://nadeausoftware.com/articles/2012/01/c_c_tip_how_use_compiler_predefined_macros_detect_operating_system
os_macros = {
"windows": "_WIN32",
"solaris": "__sun",
"freebsd": "__FreeBSD__",
"openbsd": "__OpenBSD__",
"osx": "__APPLE__",
"linux": "__linux__",
}
def CheckForOS(context, which_os):
test_body = """
#if defined({0})
/* detected {1} */
#else
#error
#endif
""".format(os_macros[which_os], which_os)
context.Message('Checking if target OS {0} is supported by the toolchain '.format(which_os))
ret = context.TryCompile(textwrap.dedent(test_body), ".c")
context.Result(ret)
return ret
detectConf = Configure(detectEnv, help=False, custom_tests = {
'CheckForToolchain' : CheckForToolchain,
'CheckForProcessor': CheckForProcessor,
'CheckForOS': CheckForOS,
})
if not detectConf.CheckCXX():
env.FatalError("C++ compiler {0} doesn't work", detectEnv['CXX'])
if not detectConf.CheckCC():
env.FatalError("C compiler {0} doesn't work", detectEnv['CC'])
toolchain_search_sequence = [ "GCC", "clang" ]
if is_running_os('windows'):
toolchain_search_sequence = [ 'MSVC', 'clang', 'GCC' ]
for candidate_toolchain in toolchain_search_sequence:
if detectConf.CheckForToolchain(candidate_toolchain, "C++", "CXX", ".cpp"):
detected_toolchain = candidate_toolchain
break
if not detected_toolchain:
env.FatalError("Couldn't identity the C++ compiler")
if not detectConf.CheckForToolchain(detected_toolchain, "C", "CC", ".c"):
env.FatalError("C compiler does not match identified C++ compiler")
# Now that we've detected the toolchain, we add methods to the env
# to get the canonical name of the toolchain and to test whether
# scons is using a particular toolchain.