【原创】php7安装扩展错误AS_CASE、AC_DEFINE、AC_CANONICAL_HOST

今天服务器安装swoole扩展死活提示错误： [root@netpc.com.cn swoole-4.0.0]# /usr/local/php7/bin/phpize Configuring for: PHP Api Version: 20151012 Zend Module Api No: 20151012 Zend Extension Api No: 320151012 config.m4:262: warning: AC_CANONICAL_HOST invoked multiple times configure:7794: error: possibly undefined macro: AS_CASE If this token and others are legitimate, please use m4_pattern_allow. See the Autoconf documentation. configure:7801: error: possibly undefined macro: AC_DEFINE 查README和文档里 autoconf 2.69 gcc 4.8 查询本机发现autoconf版本低了 [root@netpc.com.cn swoole-4.0.0]# rpm -qf /usr/bin/autoconf autoconf-2.59-12 升级后搞定。