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# -*- mode:python -*-
# Copyright (c) 2018, 2020 ARM Limited
#
# The license below extends only to copyright in the software and shall
# not be construed as granting a license to any other intellectual
# property including but not limited to intellectual property relating
# to a hardware implementation of the functionality of the software
# licensed hereunder. You may use the software subject to the license
# terms below provided that you ensure that this notice is replicated
# unmodified and in its entirety in all distributions of the software,
# modified or unmodified, in source code or in binary form.
#
# Copyright (c) 2004-2005 The Regents of The University of Michigan
# 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 the copyright holders 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 collections
import distutils.spawn
import itertools
import os
import os.path
import re
import sys
import SCons
from gem5_scons import Transform, warning, error, ToValue, FromValue
from gem5_scons.sources import *
Export(SourceFilter.factories)
# This file defines how to build a particular configuration of gem5
# based on variable settings in the 'env' build environment.
Import('*')
# Children need to see the environment
Export('env')
build_env = [(opt, env[opt]) for opt in export_vars]
from code_formatter import code_formatter
def GdbXml(xml_id, symbol, tags=None, add_tags=None):
cc, hh = env.Blob(symbol, xml_id)
Source(cc, tags=tags, add_tags=add_tags)
class Source(SourceFile):
pass
build_tools = Dir('#build_tools')
# Build a small helper that runs Python code using the same version of Python
# as gem5. This is in an unorthodox location to avoid building it for every
# variant.
gem5py_env = gem5py_env.Clone()
gem5py = gem5py_env.File('gem5py')
gem5py_m5 = gem5py_env.File('gem5py_m5')
gem5py_env['GEM5PY'] = gem5py
gem5py_env['GEM5PY_M5'] = gem5py_m5
gem5py_env['OBJSUFFIX'] = '.pyo'
# Inject build_tools into PYTHONPATH for when we run gem5py.
pythonpath = gem5py_env['ENV'].get('PYTHONPATH', '').split(':')
pythonpath.append(build_tools.abspath)
gem5py_env['ENV']['PYTHONPATH'] = ':'.join(pythonpath)
class PySource(SourceFile):
'''Add a python source file to the named package'''
def __init__(self, package, source, tags=None, add_tags=None):
'''specify the python package, the source file, and any tags'''
super().__init__(source, tags, add_tags)
basename = os.path.basename(self.filename)
modname, ext = os.path.splitext(basename)
assert ext == '.py'
if package:
modpath = package.split('.')
else:
modpath = []
if modname != '__init__':
modpath += [ modname ]
modpath = '.'.join(modpath)
abspath = self.snode.abspath
if not os.path.exists(abspath):
abspath = self.tnode.abspath
self.modpath = modpath
cpp = File(self.filename + '.cc')
overrides = {
'PYSOURCE_MODPATH': modpath,
'PYSOURCE_ABSPATH': abspath,
'PYSOURCE': File(source),
'MARSHAL_PY': build_tools.File('marshal.py')
}
gem5py_env.Command(cpp,
[ '${PYSOURCE}', '${GEM5PY}', '${MARSHAL_PY}' ],
MakeAction('"${GEM5PY}" "${MARSHAL_PY}" "${TARGET}" ' \
'"${PYSOURCE}" "${PYSOURCE_MODPATH}" ' \
'"${PYSOURCE_ABSPATH}"',
Transform("EMBED PY", max_sources=1)),
**overrides)
Source(cpp, tags=self.tags, add_tags=['python', 'm5_module'])
class SimObject(PySource):
'''Add a SimObject python file as a python source object and add
it to a list of sim object modules'''
def __init__(self, source, *, sim_objects=None, enums=None,
tags=None, add_tags=None):
'''Specify the source file and any tags (automatically in
the m5.objects package)'''
if sim_objects is None:
if enums is None:
error(f"SimObject({source}...) must list c++ sim_objects or "
"enums (set either to [] if there are none).")
sim_objects = []
if enums is None:
enums = []
super().__init__('m5.objects', source, tags, add_tags)
build_dir = Dir(env['BUILDDIR'])
module = self.modpath
# Generate all of the SimObject param C++ files.
for simobj in sim_objects:
# Some helper functions
srcs = [ Value(module), Value(simobj),
"${GEM5PY_M5}", "${PYSCRIPT}" ]
def cmdline(*args):
all_args = [ 'GEM5PY_M5', 'PYSCRIPT', 'MODULE' ] + list(args)
return ' '.join(list('"${%s}"' % arg for arg in all_args))
# Params header.
gem5py_env.Command([ "${PARAMS_HH}" ], srcs,
MakeAction(cmdline('PARAMS_HH'), Transform("SO Param", 2)),
MODULE=module,
SIMOBJ=simobj,
PYSCRIPT=build_tools.File('sim_object_param_struct_hh.py'),
PARAMS_HH=build_dir.File(f'params/{simobj}.hh'))
# Params cc.
cc_file = build_dir.File(f'python/_m5/param_{simobj}.cc')
gem5py_env.Command([ "${PARAMS_CC}" ], srcs,
MakeAction(cmdline('PARAMS_CC', 'USE_PYTHON'),
Transform("SO Param", 2)),
PYSCRIPT=build_tools.File('sim_object_param_struct_cc.py'),
MODULE=module,
SIMOBJ=simobj,
PARAMS_CC=cc_file,
USE_PYTHON=env['USE_PYTHON'])
Source(cc_file, tags=self.tags, add_tags='python')
# CXX config header.
gem5py_env.Command([ "${CXXCONFIG_HH}" ], srcs,
MakeAction(cmdline('CXXCONFIG_HH'),
Transform("CXXCPRHH", 2)),
PYSCRIPT=build_tools.File('cxx_config_hh.py'),
MODULE=module,
CXXCONFIG_HH=build_dir.File(f'cxx_config/{simobj}.hh'))
# CXX config cc.
cc_file=build_dir.File(f'cxx_config/{simobj}.cc')
gem5py_env.Command([ "${CXXCONFIG_CC}" ], srcs,
MakeAction(cmdline('CXXCONFIG_CC'),
Transform("CXXCPRCC", 2)),
PYSCRIPT=build_tools.File('cxx_config_cc.py'),
MODULE=module,
CXXCONFIG_CC=cc_file)
if GetOption('with_cxx_config'):
Source(cc_file, tags=self.tags)
# C++ versions of enum params.
for enum in enums:
gem5py_env.Command([ "${ENUM_HH}" ],
[ Value(module), Value(enum),
"${GEM5PY_M5}", "${ENUMHH_PY}" ],
MakeAction('"${GEM5PY_M5}" "${ENUMHH_PY}" "${MODULE}" ' \
'"${ENUM_HH}"',
Transform("ENUMDECL", 2)),
MODULE=module,
ENUM=enum,
ENUM_HH=build_dir.File(f'enums/{enum}.hh'),
ENUMHH_PY=build_tools.File('enum_hh.py'))
cc_file = build_dir.File(f'enums/{enum}.cc')
gem5py_env.Command([ "${ENUM_CC}" ],
[ Value(module), Value(enum),
"${GEM5PY_M5}", "${ENUMCC_PY}" ],
MakeAction('"${GEM5PY_M5}" "${ENUMCC_PY}" "${MODULE}" ' \
'"${ENUM_CC}" "${USE_PYTHON}"',
Transform("ENUM STR", 2)),
MODULE=module,
ENUM=enum,
ENUM_CC=cc_file,
ENUMCC_PY=build_tools.File('enum_cc.py'),
USE_PYTHON='--use-python' if env['USE_PYTHON'] else '')
Source(cc_file, tags=self.tags, add_tags='python')
# This regular expression is simplistic and assumes that the import takes up
# the entire line, doesn't have the keyword "public", uses double quotes, has
# no whitespace at the end before or after the ;, and is all on one line. This
# should still cover most cases, and a completely accurate scanner would be
# MUCH more complex.
protoc_import_re = re.compile(r'^import\s+\"(.*\.proto)\"\;$', re.M)
def protoc_scanner(node, env, path):
deps = []
for imp in protoc_import_re.findall(node.get_text_contents()):
deps.append(Dir(env['BUILDDIR']).File(imp))
return deps
env.Append(SCANNERS=Scanner(function=protoc_scanner, skeys=['.proto']))
def protoc_emitter(target, source, env):
root, ext = os.path.splitext(source[0].get_abspath())
return [root + '.pb.cc', root + '.pb.h'], source
protoc_action = MakeAction('${PROTOC} --cpp_out ${BUILDDIR} '
'--proto_path ${BUILDDIR} ${SOURCE.get_abspath()}',
Transform("PROTOC"))
protobuf_builder = Builder(action=protoc_action, emitter=protoc_emitter,
src_suffix='.proto')
env.Append(BUILDERS={'ProtoBufCC' : protobuf_builder})
c_file, cxx_file = SCons.Tool.createCFileBuilders(env)
cxx_file.add_action('.proto', protoc_action)
cxx_file.add_emitter('.proto', protoc_emitter)
def ProtoBuf(source, tags=None, add_tags=None):
'''Add a Protocol Buffer to build'''
if not env['HAVE_PROTOC'] or not env['HAVE_PROTOBUF']:
error('Got protobuf to build, but lacks support!')
'''Specify the source file, and any tags'''
Source(source, tags, add_tags, append={'CXXFLAGS': '-Wno-array-bounds'})
env['PROTOC_GRPC'] = distutils.spawn.find_executable('grpc_cpp_plugin')
if env['PROTOC_GRPC']:
env.Append(LIBS=['grpc++'])
def protoc_grpc_emitter(target, source, env):
root, ext = os.path.splitext(source[0].get_abspath())
return [root + '.grpc.pb.cc', root + '.grpc.pb.h'], source
protoc_grpc_action=MakeAction('${PROTOC} --grpc_out ${BUILDDIR} '
'--plugin=protoc-gen-grpc=${PROTOC_GRPC} --proto_path ${BUILDDIR} '
'${SOURCE.get_abspath()}',
Transform("PROTOC"))
env.Append(BUILDERS={'GrpcProtoBufCC' : Builder(
action=protoc_grpc_action,
emitter=protoc_grpc_emitter
)})
def GrpcProtoBuf(source, tags=None, add_tags=None):
'''Add a GRPC protocol buffer to the build'''
if not env['PROTOC_GRPC']:
error('No grpc_cpp_plugin found')
Source(env.GrpcProtoBufCC(source=source)[0], tags=tags, add_tags=add_tags)
Source(env.ProtoBufCC(source=source)[0], tags=tags, add_tags=add_tags)
date_source = File('base/date.cc')
class TopLevelMeta(type):
'''Meta class for top level build products, ie binaries and libraries.'''
all = []
def __init__(cls, name, bases, d):
TopLevelMeta.all.append(cls)
super().__init__(name, bases, d)
cls.all = []
class TopLevelBase(object, metaclass=TopLevelMeta):
'''Base class for linked build products.'''
def __init__(self, target, *srcs_and_filts):
'''Specify the target name and any sources. Sources that are
not SourceFiles are evalued with Source().'''
super().__init__()
self.all.append(self)
self.target = target
isFilter = lambda arg: isinstance(arg, SourceFilter)
self.filters = filter(isFilter, srcs_and_filts)
sources = filter(lambda a: not isFilter(a), srcs_and_filts)
srcs = SourceList()
for src in sources:
if not isinstance(src, SourceFile):
src = Source(src, tags=[])
srcs.append(src)
self.srcs = srcs
self.dir = Dir('.')
def sources(self, env):
srcs = self.srcs
for f in self.filters:
srcs += Source.all.apply_filter(env, f)
return srcs
def srcs_to_objs(self, env, sources):
return list([ s.static(env) for s in sources ])
@classmethod
def declare_all(cls, env):
return list([ instance.declare(env) for instance in cls.all ])
class StaticLib(TopLevelBase):
'''Base class for creating a static library from sources.'''
def declare(self, env):
objs = self.srcs_to_objs(env, self.sources(env))
date_obj = env.StaticObject(date_source)
env.Depends(date_obj, objs)
return env.StaticLibrary(self.target, [date_obj, objs])[0]
class SharedLib(TopLevelBase):
'''Base class for creating a shared library from sources.'''
def srcs_to_objs(self, env, sources):
return list([ s.shared(env) for s in sources ])
def declare(self, env):
objs = self.srcs_to_objs(env, self.sources(env))
date_obj = env.SharedObject(date_source)
env.Depends(date_obj, objs)
return env.SharedLibrary(self.target, [date_obj, objs])[0]
class Executable(TopLevelBase):
'''Base class for creating an executable from sources.'''
def path(self, env):
return self.dir.File(self.target + '.${ENV_LABEL}')
def declare(self, env, objs=None):
if objs is None:
objs = self.srcs_to_objs(env, self.sources(env))
env = env.Clone()
env['BIN_RPATH_PREFIX'] = os.path.relpath(
env['BUILDDIR'], self.path(env).dir.abspath)
executable = env.Program(self.path(env).abspath, objs)[0]
if sys.platform == 'sunos5':
cmd = 'cp $SOURCE $TARGET; strip $TARGET'
else:
cmd = 'strip $SOURCE -o $TARGET'
stripped = env.Command(str(executable) + '.stripped',
executable, MakeAction(cmd, Transform("STRIP")))[0]
return [executable, stripped]
class Gem5(Executable):
'''Base class for the main gem5 executable.'''
def declare(self, env):
objs = self.srcs_to_objs(env, self.sources(env))
date_obj = env.StaticObject(date_source)
env.Depends(date_obj, objs)
objs.append(date_obj)
return super().declare(env, objs)
class GTest(Executable):
'''Create a unit test based on the google test framework.'''
all = []
def __init__(self, *srcs_and_filts, **kwargs):
if not kwargs.pop('skip_lib', False):
srcs_and_filts = srcs_and_filts + (with_tag('gtest lib'),)
super().__init__(*srcs_and_filts)
@classmethod
def declare_all(cls, env):
env = env.Clone()
env['OBJSUFFIX'] = '.t' + env['OBJSUFFIX'][1:]
env['SHOBJSUFFIX'] = '.t' + env['SHOBJSUFFIX'][1:]
env.Append(LIBS=env['GTEST_LIBS'])
env.Append(CPPFLAGS=env['GTEST_CPPFLAGS'])
env['GTEST_OUT_DIR'] = \
Dir(env['BUILDDIR']).Dir('unittests.${ENV_LABEL}')
return super().declare_all(env)
def declare(self, env):
binary, stripped = super().declare(env)
out_dir = env['GTEST_OUT_DIR']
xml_file = out_dir.Dir(str(self.dir)).File(self.target + '.xml')
AlwaysBuild(env.Command(xml_file.abspath, binary,
"${SOURCES[0]} --gtest_output=xml:${TARGETS[0]}"))
return binary
# Children should have access
Export('GdbXml')
Export('Source')
Export('PySource')
Export('SimObject')
Export('ProtoBuf')
Export('GrpcProtoBuf')
Export('Executable')
Export('GTest')
########################################################################
#
# Debug Flags
#
debug_flags = set()
def DebugFlagCommon(name, flags, desc, fmt, tags, add_tags):
if name == "All":
raise AttributeError('The "All" flag name is reserved')
if name in debug_flags:
raise AttributeError(f'Flag {name} already specified')
debug_flags.add(name)
hh_file = Dir(env['BUILDDIR']).Dir('debug').File(f'{name}.hh')
gem5py_env.Command(hh_file,
[ '${GEM5PY}', '${DEBUGFLAGHH_PY}' ],
MakeAction('"${GEM5PY}" "${DEBUGFLAGHH_PY}" "${TARGET}" "${NAME}" ' \
'"${DESC}" "${FMT}" "${COMPONENTS}"',
Transform("TRACING", 0)),
DEBUGFLAGHH_PY=build_tools.File('debugflaghh.py'),
NAME=name, DESC=desc, FMT=('True' if fmt else 'False'),
COMPONENTS=':'.join(flags))
cc_file = Dir(env['BUILDDIR']).Dir('debug').File('%s.cc' % name)
gem5py_env.Command(cc_file,
[ "${GEM5PY}", "${DEBUGFLAGCC_PY}" ],
MakeAction('"${GEM5PY}" "${DEBUGFLAGCC_PY}" "${TARGET}" "${NAME}"',
Transform("TRACING", 0)),
DEBUGFLAGCC_PY=build_tools.File('debugflagcc.py'), NAME=name)
if not add_tags:
add_tags = set()
if isinstance(add_tags, str):
add_tags = { add_tags }
if not isinstance(add_tags, set):
add_tags = set(add_tags)
add_tags.add('gem5 trace')
Source(cc_file, tags=tags, add_tags=add_tags)
def DebugFlag(name, desc=None, fmt=False, tags=None, add_tags=None):
DebugFlagCommon(name, (), desc, fmt, tags=tags, add_tags=add_tags)
def CompoundFlag(name, flags, desc=None, tags=None, add_tags=None):
DebugFlagCommon(name, flags, desc, False, tags=tags, add_tags=add_tags)
def DebugFormatFlag(name, desc=None, tags=None, add_tags=None):
DebugFlag(name, desc, True, tags=tags, add_tags=add_tags)
Export('DebugFlag')
Export('CompoundFlag')
Export('DebugFormatFlag')
########################################################################
#
# Set some compiler variables
#
# Include file paths are rooted in this directory. SCons will
# automatically expand '.' to refer to both the source directory and
# the corresponding build directory to pick up generated include
# files.
env.Append(CPPPATH=Dir('.'))
for extra_dir in extras_dir_list:
env.Append(CPPPATH=Dir(extra_dir))
########################################################################
#
# Walk the tree and execute all SConscripts in subdirectories
#
here = Dir('.').srcnode().abspath
for root, dirs, files in os.walk(base_dir, topdown=True):
if root == here:
# we don't want to recurse back into this SConscript
continue
if 'SConscript' in files:
build_dir = os.path.join(env['BUILDDIR'], root[len(base_dir) + 1:])
SConscript(os.path.join(root, 'SConscript'), variant_dir=build_dir)
for extra_dir in extras_dir_list:
prefix_len = len(os.path.dirname(extra_dir)) + 1
# Also add the corresponding build directory to pick up generated
# include files.
env.Append(CPPPATH=Dir(env['BUILDDIR']).Dir(extra_dir[prefix_len:]))
for root, dirs, files in os.walk(extra_dir, topdown=True):
# if build lives in the extras directory, don't walk down it
if 'build' in dirs:
dirs.remove('build')
if 'SConscript' in files:
build_dir = os.path.join(env['BUILDDIR'], root[prefix_len:])
SConscript(os.path.join(root, 'SConscript'), variant_dir=build_dir)
for opt in export_vars:
env.ConfigFile(opt)
def makeTheISA(source, target, env):
isas = sorted(set(env.Split('${ALL_ISAS}')))
target_isa = env['TARGET_ISA']
is_null_isa = '1' if (target_isa.lower() == 'null') else '0'
def namespace(isa):
return isa[0].upper() + isa[1:].lower() + 'ISA'
code = code_formatter()
code('''\
#ifndef __CONFIG_THE_ISA_HH__
#define __CONFIG_THE_ISA_HH__
#define IS_NULL_ISA ${{is_null_isa}}
#define TheISA ${{namespace(target_isa)}}
#endif // __CONFIG_THE_ISA_HH__''')
code.write(str(target[0]))
env.Command('config/the_isa.hh', [],
MakeAction(makeTheISA, Transform("CFG ISA", 0)))
def makeTheGPUISA(source, target, env):
gpu_isa = env['TARGET_GPU_ISA']
namespace = gpu_isa[0].upper() + gpu_isa[1:].lower() + 'ISA'
code = code_formatter()
code('''\
#ifndef TheGpuISA
#define TheGpuISA ${namespace}
#endif // TheGpuISA''')
code.write(str(target[0]))
env.Command('config/the_gpu_isa.hh', [],
MakeAction(makeTheGPUISA, Transform("CFG ISA", 0)))
########################################################################
#
# Commands for the basic automatically generated python files
#
# Generate Python file containing a dict specifying the current
# buildEnv flags.
def makeDefinesPyFile(target, source, env):
code = code_formatter()
code("buildEnv = $0", FromValue(source[0]))
code.write(target[0].abspath)
# Generate a file with all of the compile options in it
env.Command('python/m5/defines.py', ToValue(dict(build_env)),
MakeAction(makeDefinesPyFile, Transform("DEFINES", 0)))
PySource('m5', 'python/m5/defines.py')
# Generate a file that wraps the basic top level files
gem5py_env.Command('python/m5/info.py',
[ File('#/COPYING'), File('#/LICENSE'), File('#/README'),
"${GEM5PY}", "${INFOPY_PY}" ],
MakeAction('"${GEM5PY}" "${INFOPY_PY}" "${TARGET}" '
'${SOURCES[:-2]}',
Transform("INFO", 3)),
INFOPY_PY=build_tools.File('infopy.py'))
PySource('m5', 'python/m5/info.py')
gem5py_m5_env = gem5py_env.Clone()
gem5py_env.Append(CPPPATH=env['CPPPATH'])
gem5py_env.Append(LIBS='z')
gem5py_env.Program(gem5py, 'python/gem5py.cc')[0]
m5_module_source = \
Source.all.with_all_tags(env, 'm5_module', 'gem5 lib')
m5_module_static = list(map(lambda s: s.static(gem5py_env), m5_module_source))
gem5py_env.Program(gem5py_m5, [ 'python/gem5py.cc' ] + m5_module_static)
# version tags
tags = \
env.Command('sim/tags.cc', None,
MakeAction('util/cpt_upgrader.py --get-cc-file > $TARGET',
Transform("VER TAGS")))
env.AlwaysBuild(tags)
########################################################################
#
# Define binaries. Each different build type (debug, opt, etc.) gets
# a slightly different build environment.
#
env['SHOBJSUFFIX'] = '${OBJSUFFIX}s'
envs = {
'debug': env.Clone(ENV_LABEL='debug', OBJSUFFIX='.do'),
'opt': env.Clone(ENV_LABEL='opt', OBJSUFFIX='.o'),
'fast': env.Clone(ENV_LABEL='fast', OBJSUFFIX='.fo'),
}
envs['debug'].Append(CPPDEFINES=['DEBUG', 'TRACING_ON=1'])
envs['opt'].Append(CCFLAGS=['-g'], CPPDEFINES=['TRACING_ON=1'])
envs['fast'].Append(CPPDEFINES=['NDEBUG', 'TRACING_ON=0'])
# For Link Time Optimization, the optimisation flags used to compile
# individual files are decoupled from those used at link time
# (i.e. you can compile with -O3 and perform LTO with -O0), so we need
# to also update the linker flags based on the target.
if env['GCC']:
if sys.platform == 'sunos5':
envs['debug'].Append(CCFLAGS=['-gstabs+'])
else:
envs['debug'].Append(CCFLAGS=['-ggdb3'])
envs['debug'].Append(LINKFLAGS=['-O0'])
# opt and fast share the same cc flags, also add the optimization to the
# linkflags as LTO defers the optimization to link time
for target in ['opt', 'fast']:
envs[target].Append(CCFLAGS=['-O3', '${LTO_CCFLAGS}'])
envs[target].Append(LINKFLAGS=['-O3', '${LTO_LINKFLAGS}'])
elif env['CLANG']:
envs['debug'].Append(CCFLAGS=['-g', '-O0'])
# opt and fast share the same cc flags
for target in ['opt', 'fast']:
envs[target].Append(CCFLAGS=['-O3'])
else:
error('Unknown compiler, please fix compiler options')
# To speed things up, we only instantiate the build environments we need. We
# try to identify the needed environment for each target; if we can't, we fall
# back on instantiating all the environments just to be safe.
# A set of all the extensions on targets.
target_exts = set({ os.path.splitext(t)[1] for t in BUILD_TARGETS })
needed_envs = set()
for ext in target_exts:
match = next((e for e in envs.values() if ext in (
'.' + e['ENV_LABEL'], e['OBJSUFFIX'])), None)
if match:
needed_envs.add(match['ENV_LABEL'])
else:
needed_envs |= set(envs.keys())
break
# SCons doesn't know to append a library suffix when there is a '.' in the
# name. Use '_' instead.
lib_name = 'gem5_${ENV_LABEL}'
lib_filter = with_tag('gem5 lib')
# Without Python, leave out all Python content from the library builds. The
# option doesn't affect gem5 built as a program.
if GetOption('without_python'):
lib_filter = lib_filter & without_tag('python')
StaticLib(lib_name, lib_filter)
SharedLib(lib_name, lib_filter)
Gem5('gem5', with_any_tags('gem5 lib', 'main'))
# Function to create a new build environment as clone of current
# environment 'env' with modified object suffix and optional stripped
# binary.
for env in (envs[e] for e in needed_envs):
for cls in TopLevelMeta.all:
cls.declare_all(env)