Short source code path vs Absolute source code path, returned by MFU_LOG function in mfu_util.h

The MFU_LOG function gives some debuging informations such as the full or absolute path of the source code. Here is an example:

[XXX ~]$ dbcast
[2022-03-09T11:06:23] [0] [/stck/montreui/rpmbuild/BUILD/mpiFileUtils-0.11.1/mpifileutils-0.11.1/src/dbcast/dbcast.c:550] ERROR: Failed to find source and/or destination file names

Usage: dbcast [options] <SRC> <DEST>
...

Well, in a context of deploying on a HPC calculator, I found a bit tricky to have in this example the absolute path with my user name. I would rather see a short source code path such as :

[XXX ~]$ dbcast
[2022-03-09T11:06:23] [0] [src/dbcast/dbcast.c:550] ERROR: Failed to find source and/or destination file names

Usage: dbcast [options] <SRC> <DEST>
...

I have test a modification in the source code :

#define MFU_LOG(level, ...) do {  \
        if (mfu_initialized && level <= mfu_debug_level) { \
            char timestamp[256]; \
            char *longfilename=__FILE__; \
            char shortfilename[256]; \
            char *buildpath="/stck/montreui/rpmbuild/BUILD/mpiFileUtils-0.11.1/mpifileutils--0.11.1"; \
            time_t ltime = time(NULL); \
            struct tm *ttime = localtime(&ltime); \
            strftime(timestamp, sizeof(timestamp), \
                     "%Y-%m-%dT%H:%M:%S", ttime); \
            strncpy(shortfilename,&longfilename[strlen(buildpath)],256-strlen(buildpath)); \
            if(level == MFU_LOG_DBG) { \
                fprintf(mfu_debug_stream,"[%s] [%d] [%s:%d] ", \
                        timestamp, mfu_rank, \
                        shortfilename, __LINE__); \
            } else if(level <= MFU_LOG_ERR) { \
                fprintf(mfu_debug_stream,"[%s] [%d] [%s:%d] ERROR: ", \
                        timestamp, mfu_rank, \
                        shortfilename, __LINE__); \
            } else { \
                fprintf(mfu_debug_stream,"[%s] ", \
                        timestamp); \
            } \
            fprintf(mfu_debug_stream, __VA_ARGS__); \
            fprintf(mfu_debug_stream, "\n"); \
            fflush(mfu_debug_stream); \
        } \
    } while (0)

So my idea here is to shorten the path to code source to avoid the guy's username path that have compile the library.

What ever the way of doing that... Changing the mfu_debug_level at MFU_LOG_NONE is a pity because those informations are interesting however. I did not find any way in compile options or whatsoever to avoid the long path source code.

Does it sound right or silly ?

It is my firt post, so, be cool and don't upset yoursef, please ;-)

Start in mfu_util.h at the MFU_LOG macro and inspect how FILE is currently formatted in debug and error output. Review the reported path-shortening example and determine a portable way to omit the build-directory prefix without hiding useful source locations. Done means MFU_LOG output uses a short source path while retaining the existing timestamp, rank, line, and message information.