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