def _check_compiler(self):
        """Check that 'self.compiler' really is a CCompiler object;
        if not, make it one.
        """
        # We do this late, and only on-demand, because this is an expensive
        # import.
        from ..ccompiler import CCompiler, new_compiler

        if not isinstance(self.compiler, CCompiler):
            self.compiler = new_compiler(
                compiler=self.compiler, dry_run=self.dry_run, force=1
            )
            customize_compiler(self.compiler)
            if self.include_dirs:
                self.compiler.set_include_dirs(self.include_dirs)
            if self.libraries:
                self.compiler.set_libraries(self.libraries)
            if self.library_dirs:
                self.compiler.set_library_dirs(self.library_dirs)
Check that 'self.compiler' really is a CCompiler object;
        if not, make it one.
        
product/gradle-plugin/src/main/python/setuptools/_distutils/command/config.py