setupext.py 文件源码

def __init__(self):
        """
        Determines whether pkg-config exists on this machine.
        """
        if sys.platform == 'win32':
            self.has_pkgconfig = False
        else:
            try:
                self.pkg_config = os.environ['PKG_CONFIG']
            except KeyError:
                self.pkg_config = 'pkg-config'

            self.set_pkgconfig_path()
            status, output = getstatusoutput(self.pkg_config + " --help")
            self.has_pkgconfig = (status == 0)
            if not self.has_pkgconfig:
                print("IMPORTANT WARNING:")
                print(
                    "    pkg-config is not installed.\n"
                    "    matplotlib may not be able to find some of its dependencies")