def build_extensions()

in setup.py [0:0]
34 lines of code
9 McCabe index (conditional complexity)

    def build_extensions(self):
        if sys.platform == 'darwin':
            mac_osx_version = float('.'.join(platform.mac_ver()[0].split('.')[:2]))
            os.environ['MACOSX_DEPLOYMENT_TARGET'] = str(mac_osx_version)
            all_flags = ['-stdlib=libc++', '-mmacosx-version-min=10.7']
            if has_flag(self.compiler, [all_flags[0]]):
                self.c_opts['unix'] += [all_flags[0]]
            elif has_flag(self.compiler, all_flags):
                self.c_opts['unix'] += all_flags
            else:
                raise RuntimeError(
                    'libc++ is needed! Failed to compile with {} and {}.'.
                    format(" ".join(all_flags), all_flags[0])
                )
        ct = self.compiler.compiler_type
        opts = self.c_opts.get(ct, [])
        extra_link_args = []

        if coverage:
            coverage_option = '--coverage'
            opts.append(coverage_option)
            extra_link_args.append(coverage_option)

        if ct == 'unix':
            opts.append('-DVERSION_INFO="%s"' % self.distribution.get_version())
            opts.append(cpp_flag(self.compiler))
            if has_flag(self.compiler, ['-fvisibility=hidden']):
                opts.append('-fvisibility=hidden')
        elif ct == 'msvc':
            opts.append(
                '/DVERSION_INFO=\\"%s\\"' % self.distribution.get_version()
            )
        for ext in self.extensions:
            ext.extra_compile_args = opts
            ext.extra_link_args = extra_link_args
        build_ext.build_extensions(self)