setupext.py 文件源码

def check(self):
        self.__class__.found_external = True
        try:
            return self._check_for_pkg_config(
                'qhull', 'qhull/qhull_a.h', min_version='2003.1')
        except CheckFailed as e:
            self.__class__.found_pkgconfig = False
            # Qhull may not be in the pkg-config system but may still be
            # present on this system, so check if the header files can be
            # found.
            include_dirs = [
                os.path.join(x, 'qhull') for x in get_include_dirs()]
            if has_include_file(include_dirs, 'qhull_a.h'):
                return 'Using system Qhull (version unknown, no pkg-config info)'
            else:
                self.__class__.found_external = False
                return str(e) + ' Using local copy.'