cxx17.py

#! /usr/bin/env python
# encoding: utf-8


def configure(conf):
    def get_param(varname, default):
        return getattr(Options.options, varname, "") or default

    cxx17_fragment = "#include <memory>\nint main() { std::make_unique<int>(); enum class color {red, blue}; }"

    flags = ["-std=c++17", "-std=c++1y"]
    if conf.options.cxx17_flag:
        flags = [conf.options.cxx17_flag]
    found_cxx17 = False
    for flag in flags:
        try:
            conf.check_cxx(
                msg="Checking C++ 17 flag " + flag,
                fragment=cxx17_fragment,
                cxxflags=flag,
                linkflags=flag,
                uselib_store="cxx17",
            )
        except conf.errors.ConfigurationError:
            continue
        else:
            found_cxx17 = True
            break
    if not found_cxx17:
        conf.fatal("Could not find C++ 17 flag")


def options(opt):
    cxx17 = opt.add_option_group("C++ 17 Options")
    cxx17.add_option("--cxx17-flag", help="Flag to enable C++ 17")