error: 'LOG_TAG' macro redefined

Android build error:

frameworks/native/services/inputflinger/EventHub.cpp:34:9: error: 'LOG_TAG' macro redefined [-Werror,-Wmacro-redefined]
#define LOG_TAG "EventHub"
        ^
system/core/liblog/include/log/log.h:51:9: note: previous definition is here
#define LOG_TAG NULL
        ^

AuthBlog：秋城https://www.cnblogs.com/houser0323

Solution

1.Use #undef
look this : 去除使用log时的警告信息:"LOG_TAG" redefined 的方法

#ifdef LOG_TAG
#undef LOG_TAG
#define LOG_TAG "EventHub"
#endif

2.Change order
first : #define and after that : #include

#define LOG_TAG "EventHub"
 ... 
#include<utils/CallStack.h>