Defining global variables in the C language header file causes duplicate definition errors

After the partner upgrades the SDK, the program compiles a duplicate definition of the variable error, through the error message cannot find where the duplicate definition, but to determine the introduction of the new SDK before the error occurs, from the SDK header file lookup, and finally found in the header file defined in the global variables

Our projects include the SDK header files in multiple header files, so the equivalent of this global variable is defined in multiple header files and therefore an error.

Summary: Header files do not have any definition of global variables appearing

Defining global variables in the C language header file causes duplicate definition errors