编译期移除__FILE__的冗余前缀

 

On the CMakeLists.txt file, define a macro that has the length of the path to your project on CMake:

# The additional / is important to remove the last character from the path.
# Note that it does not matter if the OS uses / or \, because we are only
# saving the path size.
string(LENGTH "${CMAKE_SOURCE_DIR}/" SOURCE_PATH_SIZE)
add_definitions("-DSOURCE_PATH_SIZE=${SOURCE_PATH_SIZE}")

On your source code, define a __FILENAME__ macro that just adds the source path size to the __FILE__ macro:

#define __FILENAME__ (__FILE__ + SOURCE_PATH_SIZE)