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57fcbc370c
v8/SConstruct
sgjesse@gmail.com 4144ac3adc Refactored the evn override handling to a single method and fixed the handling 
of the case where ENV is not a dictionary which could happen when the
environment variable ENV was set when invoking SCons.

Fixed building dynamic library on Windows in the case where env overrides was
specified as before these was not passed to the linking of the DLL.

There is still a SCons issue when the environment variable ENV is set when
invoking SCons, however this looks like a SCons issue.


git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@156 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2008-09-05 10:00:50 +00:00

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# Copyright 2008 Google Inc. All rights reserved.
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following
# disclaimer in the documentation and/or other materials provided
# with the distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
import platform
import re
import sys
import os
from os.path import join, dirname, abspath
from types import DictType
root_dir = dirname(File('SConstruct').rfile().abspath)
sys.path.append(join(root_dir, 'tools'))
import js2c, utils
LIBRARY_FLAGS = {
'all': {
'CPPDEFINES': ['ENABLE_LOGGING_AND_PROFILING']
},
'gcc': {
'all': {
'DIALECTFLAGS': ['-ansi'],
'CCFLAGS': ['$DIALECTFLAGS', '$WARNINGFLAGS',
'-fno-strict-aliasing'],
'CXXFLAGS': ['$CCFLAGS', '-fno-rtti', '-fno-exceptions'],
'LIBS': ['pthread']
},
'mode:debug': {
'CCFLAGS': ['-g', '-O0'],
'CPPDEFINES': ['ENABLE_DISASSEMBLER', 'DEBUG']
},
'mode:release': {
'CCFLAGS': ['-O2']
},
'wordsize:64': {
'CCFLAGS': ['-m32'],
'LINKFLAGS': ['-m32']
},
},
'msvc': {
'all': {
'DIALECTFLAGS': ['/nologo'],
'WARNINGFLAGS': ['/W3', '/WX', '/wd4355', '/wd4800'],
'CCFLAGS': ['$DIALECTFLAGS', '$WARNINGFLAGS'],
'CXXFLAGS': ['$CCFLAGS', '/GR-', '/Gy'],
'CPPDEFINES': ['WIN32', '_CRT_SECURE_NO_DEPRECATE',
'_CRT_NONSTDC_NO_DEPRECATE', '_USE_32BIT_TIME_T',
'PCRE_STATIC'],
'LINKFLAGS': ['/NOLOGO', '/MACHINE:X86', '/INCREMENTAL:NO',
'/NXCOMPAT', '/IGNORE:4221'],
'ARFLAGS': ['/NOLOGO'],
'CCPDBFLAGS': ['/Zi']
},
'mode:debug': {
'CCFLAGS': ['/Od', '/Gm', '/MTd'],
'CPPDEFINES': ['_DEBUG', 'ENABLE_DISASSEMBLER', 'DEBUG'],
'LINKFLAGS': ['/DEBUG']
},
'mode:release': {
'CCFLAGS': ['/Ox', '/MT', '/Ob2', '/Oi', '/Oy'],
'LINKFLAGS': ['/OPT:REF', '/OPT:ICF']
}
}
}
V8_EXTRA_FLAGS = {
'gcc': {
'all': {
'CXXFLAGS': [], #['-fvisibility=hidden'],
'WARNINGFLAGS': ['-pedantic', '-Wall', '-Werror', '-W',
'-Wno-unused-parameter']
},
'arch:arm': {
'CPPDEFINES': ['ARM']
},
},
'msvc': {
'all': {
'WARNINGFLAGS': ['/W3', '/WX', '/wd4355', '/wd4800']
},
'library:shared': {
'CPPDEFINES': ['BUILDING_V8_SHARED']
},
'arch:arm': {
'CPPDEFINES': ['ARM']
},
}
}
JSCRE_EXTRA_FLAGS = {
'gcc': {
'all': {
'CPPDEFINES': ['SUPPORT_UTF8', 'NO_RECURSE', 'SUPPORT_UCP'],
'WARNINGFLAGS': ['-w']
},
},
'msvc': {
'all': {
'CPPDEFINES': ['SUPPORT_UTF8', 'NO_RECURSE', 'SUPPORT_UCP'],
'WARNINGFLAGS': ['/W3', '/WX', '/wd4355', '/wd4800']
},
'library:shared': {
'CPPDEFINES': ['BUILDING_V8_SHARED']
}
}
}
DTOA_EXTRA_FLAGS = {
'gcc': {
'all': {
'WARNINGFLAGS': ['-Werror']
}
},
'msvc': {
'all': {
'WARNINGFLAGS': ['/WX', '/wd4018', '/wd4244']
}
}
}
CCTEST_EXTRA_FLAGS = {
'all': {
'CPPPATH': [join(root_dir, 'src')],
'LIBS': ['$LIBRARY']
},
'gcc': {
'all': {
'LIBPATH': [abspath('.')]
},
'wordsize:64': {
'CCFLAGS': ['-m32'],
'LINKFLAGS': ['-m32']
},
},
'msvc': {
'all': {
'CPPDEFINES': ['_HAS_EXCEPTIONS=0']
},
'library:shared': {
'CPPDEFINES': ['USING_V8_SHARED']
}
}
}
SAMPLE_FLAGS = {
'all': {
'CPPPATH': [join(abspath('.'), 'include')],
'LIBS': ['$LIBRARY'],
},
'gcc': {
'all': {
'LIBS': ['pthread'],
'LIBPATH': ['.']
},
'wordsize:64': {
'CCFLAGS': ['-m32'],
'LINKFLAGS': ['-m32']
},
},
'msvc': {
'all': {
'CCFLAGS': ['/nologo'],
},
'library:shared': {
'CPPDEFINES': ['USING_V8_SHARED']
},
'mode:release': {
'CCFLAGS': ['/MT'],
},
'mode:debug': {
'CCFLAGS': ['/MTd']
}
}
}
SUFFIXES = {
'release': '',
'debug': '_g'
}
def Abort(message):
print message
sys.exit(1)
def GuessOS():
id = platform.system()
if id == 'Linux':
return 'linux'
elif id == 'Darwin':
return 'macos'
elif id == 'Windows':
return 'win32'
else:
return None
def GuessWordsize():
if '64' in platform.machine():
return '64'
else:
return '32'
def GuessToolchain(os):
tools = Environment()['TOOLS']
if 'gcc' in tools:
return 'gcc'
elif 'msvc' in tools:
return 'msvc'
else:
return None
OS_GUESS = GuessOS()
TOOLCHAIN_GUESS = GuessToolchain(OS_GUESS)
ARCH_GUESS = utils.GuessArchitecture()
WORDSIZE_GUESS = GuessWordsize()
SIMPLE_OPTIONS = {
'toolchain': {
'values': ['gcc', 'msvc'],
'default': TOOLCHAIN_GUESS,
'help': 'the toolchain to use'
},
'os': {
'values': ['linux', 'macos', 'win32'],
'default': OS_GUESS,
'help': 'the os to build for'
},
'arch': {
'values':['arm', 'ia32'],
'default': ARCH_GUESS,
'help': 'the architecture to build for'
},
'snapshot': {
'values': ['on', 'off'],
'default': 'off',
'help': 'build using snapshots for faster start-up'
},
'library': {
'values': ['static', 'shared'],
'default': 'static',
'help': 'the type of library to produce'
},
'wordsize': {
'values': ['64', '32'],
'default': WORDSIZE_GUESS,
'help': 'the word size'
},
'simulator': {
'values': ['arm', 'none'],
'default': 'none',
'help': 'build with simulator'
}
}
def GetOptions():
result = Options()
result.Add('mode', 'compilation mode (debug, release)', 'release')
result.Add('sample', 'build sample (shell, process)', '')
result.Add('env', 'override environment settings (NAME1:value1,NAME2:value2)', '')
for (name, option) in SIMPLE_OPTIONS.items():
help = '%s (%s)' % (name, ", ".join(option['values']))
result.Add(name, help, option.get('default'))
return result
def SplitList(str):
return [ s for s in str.split(",") if len(s) > 0 ]
def IsLegal(env, option, values):
str = env[option]
for s in SplitList(str):
if not s in values:
Abort("Illegal value for option %s '%s'." % (option, s))
return False
return True
def VerifyOptions(env):
if not IsLegal(env, 'mode', ['debug', 'release']):
return False
if not IsLegal(env, 'sample', ["shell", "process"]):
return False
for (name, option) in SIMPLE_OPTIONS.items():
if (not option.get('default')) and (name not in ARGUMENTS):
message = ("A value for option %s must be specified (%s)." %
(name, ", ".join(option['values'])))
Abort(message)
if not env[name] in option['values']:
message = ("Unknown %s value '%s'. Possible values are (%s)." %
(name, env[name], ", ".join(option['values'])))
Abort(message)
class BuildContext(object):
def __init__(self, options, env_overrides, samples):
self.library_targets = []
self.cctest_targets = []
self.sample_targets = []
self.options = options
self.env_overrides = env_overrides
self.samples = samples
self.use_snapshot = (options['snapshot'] == 'on')
self.flags = None
def AddRelevantFlags(self, initial, flags):
result = initial.copy()
self.AppendFlags(result, flags.get('all'))
toolchain = self.options['toolchain']
self.AppendFlags(result, flags[toolchain].get('all'))
for option in sorted(self.options.keys()):
value = self.options[option]
self.AppendFlags(result, flags[toolchain].get(option + ':' + value))
return result
def GetRelevantSources(self, source):
result = []
result += source.get('all', [])
for (name, value) in self.options.items():
result += source.get(name + ':' + value, [])
return sorted(result)
def AppendFlags(self, options, added):
if not added:
return
for (key, value) in added.items():
if not key in options:
options[key] = value
else:
options[key] = options[key] + value
def ConfigureObject(self, env, input, **kw):
if self.options['library'] == 'static':
return env.StaticObject(input, **kw)
else:
return env.SharedObject(input, **kw)
def ApplyEnvOverrides(self, env):
if not self.env_overrides:
return
if type(env['ENV']) == DictType:
env['ENV'].update(**self.env_overrides)
else:
env['ENV'] = self.env_overrides
def PostprocessOptions(options):
# Adjust architecture if the simulator option has been set
if (options['simulator'] != 'none') and (options['arch'] != options['simulator']):
if 'arch' in ARGUMENTS:
# Print a warning if arch has explicitly been set
print "Warning: forcing architecture to match simulator (%s)" % options['simulator']
options['arch'] = options['simulator']
def ParseEnvOverrides(arg):
# The environment overrides are in the format NAME1:value1,NAME2:value2
overrides = {}
for override in arg.split(','):
pos = override.find(':')
if pos == -1:
continue
overrides[override[:pos].strip()] = override[pos+1:].strip()
return overrides
def BuildSpecific(env, mode, env_overrides):
options = {'mode': mode}
for option in SIMPLE_OPTIONS:
options[option] = env[option]
PostprocessOptions(options)
context = BuildContext(options, env_overrides, samples=SplitList(env['sample']))
library_flags = context.AddRelevantFlags(os.environ, LIBRARY_FLAGS)
v8_flags = context.AddRelevantFlags(library_flags, V8_EXTRA_FLAGS)
jscre_flags = context.AddRelevantFlags(library_flags, JSCRE_EXTRA_FLAGS)
dtoa_flags = context.AddRelevantFlags(library_flags, DTOA_EXTRA_FLAGS)
cctest_flags = context.AddRelevantFlags(v8_flags, CCTEST_EXTRA_FLAGS)
sample_flags = context.AddRelevantFlags(os.environ, SAMPLE_FLAGS)
context.flags = {
'v8': v8_flags,
'jscre': jscre_flags,
'dtoa': dtoa_flags,
'cctest': cctest_flags,
'sample': sample_flags
}
target_id = mode
suffix = SUFFIXES[target_id]
library_name = 'v8' + suffix
env['LIBRARY'] = library_name
# Build the object files by invoking SCons recursively.
object_files = env.SConscript(
join('src', 'SConscript'),
build_dir=join('obj', target_id),
exports='context',
duplicate=False
)
# Link the object files into a library.
context.ApplyEnvOverrides(env)
if context.options['library'] == 'static':
library = env.StaticLibrary(library_name, object_files)
else:
# There seems to be a glitch in the way scons decides where to put
# PDB files when compiling using MSVC so we specify it manually.
# This should not affect any other platforms.
pdb_name = library_name + '.dll.pdb'
library = env.SharedLibrary(library_name, object_files, PDB=pdb_name)
context.library_targets.append(library)
for sample in context.samples:
sample_env = Environment(LIBRARY=library_name)
sample_env.Replace(**context.flags['sample'])
sample_env['ENV'].update(**context.env_overrides)
sample_object = sample_env.SConscript(
join('samples', 'SConscript'),
build_dir=join('obj', 'sample', sample, target_id),
exports='sample context',
duplicate=False
)
sample_name = sample + suffix
sample_program = sample_env.Program(sample_name, sample_object)
sample_env.Depends(sample_program, library)
context.sample_targets.append(sample_program)
cctest_program = env.SConscript(
join('test', 'cctest', 'SConscript'),
build_dir=join('obj', 'test', target_id),
exports='context object_files',
duplicate=False
)
context.cctest_targets.append(cctest_program)
return context
def Build():
opts = GetOptions()
env = Environment(options=opts)
Help(opts.GenerateHelpText(env))
VerifyOptions(env)
env_overrides = ParseEnvOverrides(env['env'])
libraries = []
cctests = []
samples = []
modes = SplitList(env['mode'])
for mode in modes:
context = BuildSpecific(env.Copy(), mode, env_overrides)
libraries += context.library_targets
cctests += context.cctest_targets
samples += context.sample_targets
env.Alias('library', libraries)
env.Alias('cctests', cctests)
env.Alias('sample', samples)
if env['sample']:
env.Default('sample')
else:
env.Default('library')
# We disable deprecation warnings because we need to be able to use
# env.Copy without getting warnings for compatibility with older
# version of scons. Also, there's a bug in some revisions that
# doesn't allow this flag to be set, so we swallow any exceptions.
# Lovely.
try:
SetOption('warn', 'no-deprecated')
except:
pass
Build()
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