Xash3D FWGS engine.
 
 
 
 

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# encoding: utf-8
# cxx11.py -- check if compiler can compile C++11 code with lambdas
# Copyright (C) 2018 a1batross
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
from fwgslib import get_flags_by_compiler
# Input:
# CXX11_MANDATORY(optional) -- fail if C++11 not available
# Output:
# HAVE_CXX11 -- true if C++11 available, otherwise else
def check_cxx11(ctx, msg):
try:
# not best way, but this check
# was written for exactly mainui_cpp,
# where lambdas are mandatory
ctx.check_cxx(
fragment='int main( void ){ auto pfnLambda = [](){}; return 0;}',
msg = msg)
except ctx.errors.ConfigurationError:
return False
return True
def configure(conf):
conf.env.HAVE_CXX11 = True # predict state
if not check_cxx11(conf, 'Checking if \'{0}\' supports C++11'.format(conf.env.COMPILER_CC)):
modern_cpp_flags = {
'msvc': [],
'default': ['-std=c++11']
}
flags = get_flags_by_compiler(modern_cpp_flags, conf.env.COMPILER_CC)
if(len(flags) == 0):
conf.env.HAVE_CXX11 = False
else:
env_stash = conf.env
conf.env.append_unique('CXXFLAGS', flags)
if not check_cxx11(conf, '...trying with additional flags'):
conf.env.HAVE_CXX11 = False
conf.env = env_stash
if getattr(conf.env, 'CXX11_MANDATORY'):
conf.fatal('C++11 support not available!')