@property<EOL><INDENT>def has_pkgconfig(self):<DEDENT>
if self._has_pkgconfig is None:<EOL><INDENT>if self.use_pkgconfig:<EOL><INDENT>line, exit_code = get_output("<STR_LIT>")<EOL>self._has_pkgconfig = (exit_code == <NUM_LIT:0>)<EOL><DEDENT>else:<EOL><INDENT>self._has_pkgconfig = False<EOL><DEDENT><DEDENT>return self._has_pkgconfig<EOL>
Returns whether ``pkg-config`` is available on the current system
        and it knows about igraph or not.