lujisen commented on issue #4113:
URL: https://github.com/apache/doris/issues/4113#issuecomment-1522887048
starrocks 编译报错信息：
opt/starrocks/starrocks-2.5.4/be/src/common/logconfig.cpp: In function ‘bool
starrocks::init_glog(const char*, bool)’:
/opt/starrocks/starrocks-2.5.4/be/src/common/logconfig.cpp:144:5: error:
‘FLAGS_log_filenum_quota’ was not declared in this scope
144 | FLAGS_log_filenum_quota = config::sys_log_roll_num;
| ^~~~~~~~~~~~~~~~~~~~~~~
/opt/starrocks/starrocks-2.5.4/be/src/common/logconfig.cpp:174:9: error:
‘FLAGS_log_split_method’ was not declared in this scope
174 | FLAGS_log_split_method = "day";
| ^~~~~~~~~~~~~~~~~~~~~~
/opt/starrocks/starrocks-2.5.4/be/src/common/logconfig.cpp:177:9: error:
‘FLAGS_log_split_method’ was not declared in this scope
177 | FLAGS_log_split_method = "hour";
| ^~~~~~~~~~~~~~~~~~~~~~
/opt/starrocks/starrocks-2.5.4/be/src/common/logconfig.cpp:180:9: error:
‘FLAGS_log_split_method’ was not declared in this scope
180 | FLAGS_log_split_method = "size";
| ^~~~~~~~~~~~~~~~~~~~~~
make[2]: *** [src/common/CMakeFiles/Common.dir/build.make:118:
src/common/CMakeFiles/Common.dir/logconfig.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:649:
src/common/CMakeFiles/Common.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
解决方案：
1、这个报错是由于FLAGS_log_split_method
没有声明，logconfig.cpp文件中其实有很多FLAGS_开头的变量，部分没有声明，修改添加声明即可，这里引用的是Google的glog日志，所以需要在2中先了解下glog的用法和原理；
2、可以参考下这个链接，GFlags使用文档:https://blog.csdn.net/weixin_43778179/article/details/104668113,了解下；
3、logconfig.cpp文件引入#include
<glog/logging.h>（本身已经引入的不用再次引入），然后找个starrocks的已安装的第三方库，路径一般为：/opt/starrocks/starrocks-2.5.4/thirdparty/installed/include/glog,这是编译好的，直接修改这个也可以，或者直接修改第三方库的源码中的glog/logging.h文件，重新编译三方库都可以；
4、在很多DECLARE_int32的下方声明上面报错的变量即可，我这里报错的是：FLAGS_log_split_method
和FLAGS_log_split_method ，所以这在文件中添加了两个变量的声明，如下：
// add by lujise...@inspur.com
DECLARE_int32(log_filenum_quota);
DECLARE_string(log_split_method);
详细信息请登录我的CSDN账号查看：[https://blog.csdn.net/lujisen/article/details/130386165?csdn_share_tail=%7B%22type%22%3A%22blog%22%2C%22rType%22%3A%22article%22%2C%22rId%22%3A%22130386165%22%2C%22source%22%3A%22lujisen%22%7D](https://blog.csdn.net/lujisen/article/details/130386165?csdn_share_tail=%7B%22type%22%3A%22blog%22%2C%22rType%22%3A%22article%22%2C%22rId%22%3A%22130386165%22%2C%22source%22%3A%22lujisen%22%7D)
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