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# Copyright (c) 2013, 2015-2020 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 contextlib
import os
import SCons.Script
import SCons.Util
def CheckCxxFlag(context, flag, autoadd=True):
context.Message("Checking for compiler %s support... " % flag)
last_cxxflags = context.env["CXXFLAGS"]
context.env.Append(CXXFLAGS=[flag])
pre_werror = context.env["CXXFLAGS"]
context.env.Append(CXXFLAGS=["-Werror"])
ret = context.TryCompile("// CheckCxxFlag DO NOTHING", ".cc")
context.env["CXXFLAGS"] = pre_werror
if not (ret and autoadd):
context.env["CXXFLAGS"] = last_cxxflags
context.Result(ret)
return ret
def CheckLinkFlag(context, flag, autoadd=True, set_for_shared=True):
context.Message("Checking for linker %s support... " % flag)
last_linkflags = context.env["LINKFLAGS"]
context.env.Append(LINKFLAGS=[flag])
pre_werror = context.env["LINKFLAGS"]
context.env.Append(LINKFLAGS=["-Werror"])
ret = context.TryLink("int main(int, char *[]) { return 0; }", ".cc")
context.env["LINKFLAGS"] = pre_werror
if not (ret and autoadd):
context.env["LINKFLAGS"] = last_linkflags
if ret and set_for_shared:
assert autoadd
context.env.Append(SHLINKFLAGS=[flag])
context.Result(ret)
return ret
# Add a custom Check function to test for structure members.
def CheckMember(context, include, decl, member, include_quotes="<>"):
context.Message("Checking for member %s in %s..." % (member, decl))
text = """
#include %(header)s
int main(){
%(decl)s test;
(void)test.%(member)s;
return 0;
};
""" % {
"header": include_quotes[0] + include + include_quotes[1],
"decl": decl,
"member": member,
}
ret = context.TryCompile(text, extension=".cc")
context.Result(ret)
return ret
def CheckPythonLib(context):
context.Message("Checking Python version... ")
ret = context.TryRun(
r"""
#include <pybind11/embed.h>
int
main(int argc, char **argv) {
pybind11::scoped_interpreter guard{};
pybind11::exec(
"import sys\n"
"vi = sys.version_info\n"
"sys.stdout.write('%i.%i.%i' % (vi.major, vi.minor, vi.micro));\n");
return 0;
}
""",
extension=".cc",
)
context.Result(ret[1] if ret[0] == 1 else 0)
if ret[0] == 0:
return None
else:
return tuple(map(int, ret[1].split(".")))
def CheckPkgConfig(context, pkgs, *args):
if not SCons.Util.is_List(pkgs):
pkgs = [pkgs]
assert pkgs
for pkg in pkgs:
context.Message("Checking for pkg-config package %s... " % pkg)
ret = context.TryAction("pkg-config %s" % pkg)[0]
if not ret:
context.Result(ret)
continue
if len(args) == 0:
break
cmd = " ".join(["pkg-config"] + list(args) + [pkg])
try:
context.env.ParseConfig(cmd)
ret = 1
context.Result(ret)
break
except Exception as e:
ret = 0
context.Result(ret)
return ret
@contextlib.contextmanager
def Configure(env, *args, **kwargs):
kwargs.setdefault(
"conf_dir", os.path.join(env["GEM5BUILD"], "scons_config")
)
kwargs.setdefault(
"log_file", os.path.join(env["GEM5BUILD"], "scons_config.log")
)
kwargs.setdefault("custom_tests", {})
kwargs["custom_tests"].update(
{
"CheckCxxFlag": CheckCxxFlag,
"CheckLinkFlag": CheckLinkFlag,
"CheckMember": CheckMember,
"CheckPkgConfig": CheckPkgConfig,
"CheckPythonLib": CheckPythonLib,
}
)
conf = SCons.Script.Configure(env, *args, **kwargs)
# Recent versions of scons substitute a "Null" object for Configure()
# when configuration isn't necessary, e.g., if the "--help" option is
# present. Unfortuantely this Null object always returns false,
# breaking all our configuration checks. We replace it with our own
# more optimistic null object that returns True instead.
if not conf:
def NullCheck(*args, **kwargs):
return True
class NullConf:
def __init__(self, env):
self.env = env
def Finish(self):
return self.env
def __getattr__(self, mname):
return NullCheck
conf = NullConf(main)
try:
yield conf
finally:
env.Replace(**conf.Finish().Dictionary())