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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('*')
from gem5_scons import warning
import gem5_scons
with gem5_scons.Configure(main) as conf:
# Check for <fenv.h> (C99 FP environment control)
conf.env['CONF']['HAVE_FENV'] = conf.CheckHeader('fenv.h', '<>')
if conf.env['CONF']['HAVE_FENV']:
conf.env.TagImplies('fenv', 'gem5 lib')
else:
warning("Header file <fenv.h> not found.\n"
"This host has no IEEE FP rounding mode control.")
# Check for <png.h> (libpng library needed if wanting to dump
# frame buffer image in png format)
conf.env['CONF']['HAVE_PNG'] = conf.CheckHeader('png.h', '<>')
if conf.env['CONF']['HAVE_PNG']:
conf.env.TagImplies('png', 'gem5 lib')
else:
warning("Header file <png.h> not found.\n"
"This host has no libpng library.\n"
"Disabling support for PNG framebuffers.")
conf.env['CONF']['HAVE_POSIX_CLOCK'] = \
conf.CheckLibWithHeader([None, 'rt'], 'time.h', 'C',
'clock_nanosleep(0,0,NULL,NULL);')
if not conf.env['CONF']['HAVE_POSIX_CLOCK']:
warning("Can't find library for POSIX clocks.")
# Valgrind gets much less confused if you tell it when you're using
# alternative stacks.
conf.env['CONF']['HAVE_VALGRIND'] = \
conf.CheckCHeader('valgrind/valgrind.h')
# Check if the compiler supports the [[gnu::deprecated]] attribute
# Create a temporary environment with -Werror in CCFLAGS
werror_env = main.Clone()
werror_env.Append(CCFLAGS=['-Werror'])
with gem5_scons.Configure(werror_env) as conf:
# Store result in the main environment
main['CONF']['HAVE_DEPRECATED_NAMESPACE'] = conf.TryCompile('''
int main() {return 0;}
namespace [[gnu::deprecated("Test namespace deprecation")]]
test_deprecated_namespace {}
''', '.cc')
if not main['CONF']['HAVE_DEPRECATED_NAMESPACE']:
warning("Deprecated namespaces are not supported by this compiler.\n"
"Please make sure to check the mailing list for deprecation "
"announcements.")
sticky_vars.Add(BoolVariable('USE_POSIX_CLOCK', 'Use POSIX Clocks',
'${CONF["HAVE_POSIX_CLOCK"]}'))