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# Copyright (c) 2013, 2015-2017 ARM Limited
# All rights reserved.
#
# 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) 2011 Advanced Micro Devices, Inc.
# Copyright (c) 2009 The Hewlett-Packard Development Company
# 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 os
from gem5_python_paths import extra_python_paths
def EnvDefaults(env):
# export TERM so that clang reports errors in color
use_vars = set([ 'AS', 'AR', 'CC', 'CXX', 'HOME', 'LD_LIBRARY_PATH',
'LIBRARY_PATH', 'PATH', 'PKG_CONFIG_PATH', 'PROTOC',
'PYTHONPATH', 'RANLIB', 'TERM', 'PYTHON_CONFIG',
'CCFLAGS_EXTRA', 'GEM5PY_CCFLAGS_EXTRA',
'GEM5PY_LINKFLAGS_EXTRA', 'LINKFLAGS_EXTRA', 'LANG'])
use_prefixes = [
"ASAN_", # address sanitizer symbolizer path and settings
"CCACHE_", # ccache (caching compiler wrapper) configuration
"CCC_", # clang static analyzer configuration
"DISTCC_", # distcc (distributed compiler wrapper) config
"INCLUDE_SERVER_", # distcc pump server settings
"M5", # M5 configuration (e.g., path to kernels)
"NIX_", # wrapped binaries if using nix package manager
]
for key,val in sorted(os.environ.items()):
if key in use_vars or \
any([key.startswith(prefix) for prefix in use_prefixes]):
env['ENV'][key] = val
# These variables from the environment override/become SCons variables,
# with a default if they weren't in the host environment.
var_overrides = {
'CC': env['CC'],
'CXX': env['CXX'],
'PROTOC': 'protoc',
'PYTHON_CONFIG': [ 'python3-config', 'python-config' ],
'CCFLAGS_EXTRA': '',
'GEM5PY_CCFLAGS_EXTRA': '',
'GEM5PY_LINKFLAGS_EXTRA': '',
'LINKFLAGS_EXTRA': '',
}
for key,default in var_overrides.items():
env[key] = env['ENV'].get(key, default)
# Tell scons to avoid implicit command dependencies to avoid issues
# with the param wrappes being compiled twice (see
# https://github.com/SCons/scons/issues/2811
env['IMPLICIT_COMMAND_DEPENDENCIES'] = 0
env.Decider('MD5-timestamp')
# add useful python code PYTHONPATH so it can be used by subprocesses
# as well
env.AppendENVPath('PYTHONPATH', extra_python_paths)
# Default duplicate option is to use hard links, but this messes up
# when you use emacs to edit a file in the target dir, as emacs moves
# file to file~ then copies to file, breaking the link. Symbolic
# (soft) links work better.
env.SetOption('duplicate', 'soft-copy')