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# Copyright 2020 Google, Inc.
#
# 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 copy
import os
main = Environment()
gem5_root = Dir('..').Dir('..')
# Includes which are shared with gem5 itself.
common_include = gem5_root.Dir('include')
ext_dir = gem5_root.Dir('ext')
googletest_dir = ext_dir.Dir('googletest')
src_dir = Dir('src')
build_dir = Dir('build')
def abspath(d):
return os.path.abspath(str(d))
# Universal settings.
main.Append(CXXFLAGS=[ '-O2' ])
main.Append(CCFLAGS=[ '-O2' ])
main.Append(CPPPATH=[ common_include ])
# Propogate the environment's PATH setting.
main['ENV']['PATH'] = os.environ['PATH']
# Detect some dependencies of some forms of the m5 utility/library.
main['HAVE_JAVA'] = all(key in main for key in ('JAVAC', 'JAR'))
main['HAVE_PKG_CONFIG'] = main.Detect('pkg-config') is not None
main['HAVE_LUA51'] = (main['HAVE_PKG_CONFIG'] and
os.system('pkg-config --exists lua51') == 0)
# Put the sconsign file in the build dir so everything can be deleted at once.
main.SConsignFile(os.path.join(abspath(build_dir), 'sconsign'))
# Use soft links instead of hard links when setting up a build directory.
main.SetOption('duplicate', 'soft-copy')
def GTest(env, name, *srcs, **kwargs):
if 'GTEST_ENV' not in env:
gtest_env = env.Clone(OBJSUFFIX='.to', SHOBJSUFFIX='.sto')
gtest_env.Append(CPPFLAGS=[ '${GTEST_CPPFLAGS}' ])
gtest_env.Append(LIBS=[ '${GTEST_LIBS}' ])
env['GTEST_ENV'] = gtest_env
if not srcs:
srcs = [ name + '.cc', name + '.test.cc' ]
env['GTEST_ENV'].Program('test/%s' % name, srcs, **kwargs)
main.AddMethod(GTest)
native = main.Clone()
native_dir = build_dir.Dir('native')
# Bring in the googletest sources.
native.SConscript(googletest_dir.File('SConscript'),
variant_dir=native_dir.Dir('googletest'), exports={ 'main': native })
native.SConscript(src_dir.File('SConscript.native'),
variant_dir=native_dir, exports={ 'env': native })
main['CC'] = '${CROSS_COMPILE}gcc'
main['CXX'] = '${CROSS_COMPILE}g++'
main['AS'] = '${CROSS_COMPILE}as'
main['LD'] = '${CROSS_COMPILE}ld'
main['AR'] = '${CROSS_COMPILE}ar'
class CallType(object):
def __init__(self, name):
self.name = name
self.impl_file = None
self.enabled = False
self.verifier = None
self.default = False
def impl(self, impl, verifier=None, default=False):
self.impl_file = impl
self.enabled = True
self.verifier = verifier
self.default = default
# Being the default can be disabled for testing purposes, so we can tell if
# a call type was selected because it was chosen, or because nobody else
# was.
def setup_env(self, env, allow_default=True):
env = env.Clone()
is_default = 'true' if self.default and allow_default else 'false'
env.Append(CXXFLAGS=[ '-DCALL_TYPE_IS_DEFAULT=%s' % is_default ])
return env
call_types = {
# Magic instruction.
'inst': CallType('inst'),
# Magic address.
'addr': CallType('addr'),
# Semihosting extension.
'semi': CallType('semi'),
}
for root, dirs, files in os.walk(abspath(src_dir)):
# Each SConsopts file describes an ABI of the m5 utility.
if 'SConsopts' in files:
env = main.Clone()
env['CALL_TYPE'] = copy.deepcopy(call_types)
# The user may override ABI settings by setting environment
# variables of the form ${ABI}.${OPTION}. For instance, to set the
# CROSS_COMPILE prefix for abi foo to bar-, the user would set an
# environment variable foo.CROSS_COMPILE=bar-.
#
# This also considers scons command line settings which may look like
# environment variables, but are set after "scons" on the command line.
def get_abi_opt(name, default):
var_name = env.subst('${ABI}.%s' % name)
env[name] = os.environ.get(
var_name, ARGUMENTS.get(var_name, default))
# Process the ABI's settings in the SConsopts file, storing them
# in a copy of the primary environment.
env.SConscript(Dir(root).File('SConsopts'),
exports=[ 'env', 'get_abi_opt' ])
# Once all the options have been configured, set up build targets for
# this abi.
abi_dir = build_dir.Dir(env.subst('${ABI}'))
# Bring in the googletest sources.
env.SConscript(googletest_dir.File('SConscript'),
variant_dir=abi_dir.Dir('googletest'),
exports={ 'main': env })
env.SConscript(src_dir.File('SConscript'),
variant_dir=abi_dir, exports='env')