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75 lines
1.9 KiB
75 lines
1.9 KiB
4 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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try: from fwgslib import get_flags_by_compiler
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except: from waflib.extras.fwgslib import get_flags_by_compiler
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from waflib import Configure
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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 false
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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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CXX11_LAMBDA_FRAGMENT='''
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class T
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{
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static void M(){}
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public:
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void t()
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{
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auto l = []()
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{
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T::M();
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};
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}
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};
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int main()
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{
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T t;
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t.t();
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}
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'''
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@Configure.conf
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def check_cxx11(ctx, *k, **kw):
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if not 'msg' in kw:
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kw['msg'] = 'Checking if \'%s\' supports C++11' % ctx.env.COMPILER_CXX
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if not 'mandatory' in kw:
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kw['mandatory'] = False
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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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return ctx.check_cxx(fragment=CXX11_LAMBDA_FRAGMENT, *k, **kw)
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def configure(conf):
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flags = get_flags_by_compiler(modern_cpp_flags, conf.env.COMPILER_CXX)
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if conf.check_cxx11():
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conf.env.HAVE_CXX11 = True
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elif len(flags) != 0 and conf.check_cxx11(msg='...trying with additional flags', cxxflags = flags):
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conf.env.HAVE_CXX11 = True
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conf.env.CXXFLAGS += flags
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else:
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conf.env.HAVE_CXX11 = False
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if conf.env.CXX11_MANDATORY:
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conf.fatal('C++11 support not available!')
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