Functionality without boost?

[MatthiasKauer]

Hi, I tried this library assuming that it was header-only as advertised and ran straight into compilation problems when trying the main.cpp. I removed the THREADING and SYSTEM_IDS as well as the boost libs from the Makefile and now I can build and all the threads pass.

Is there some documentation as to what I am missing out if I use the library in this way?

ifdef CPPLOG_SYSTEM_IDS seems to relate to printing process / thread ids.

ifdef CPPLOG_THREADING runs the logger in its own thread.

Can I still use the library without boost-thread using, say OpenMPI? What kind of shortcomings do I need to expect?

Best, Matthias

[MatthiasKauer]

[–]andrew-d[S] 1 point 1 year ago

If you #define CPPLOG_NO_THREADING and CPPLOG_NO_SYSTEM_IDS, it doesn't depend on Boost any more - though you lose the ability to track process/thread IDs and the use of BackgroundLogger.

I found this on the related reddit thread: http://www.reddit.com/r/programming/comments/krd8f/show_proggit_a_simple_headeronly_mitlicensed_c/ so I guess I won't lose too much.

Could you still comment on the MPI interaction? (although for projects where I use that, I probably shouldn't be so picky about installing/building boost)

[andrew-d]

Hi there,

I've never tested it with MPI, but if you #define the two variables, cpplog will only use standard C++ code. If you want all your logs to show up on the root process, you may have to write a custom logger, however. If you want to do this, see OstreamLogger for a really simple example of how to do that. I'm not super familiar with MPI, but perhaps write a logger that will check if it's process 0 and use MPI_Isend or MPI_Ibsend to send log messages to the main process?

[MatthiasKauer]

Hi, thanks for the comment. To clarify, you would assume that if I don't take care of it, I'd end up with one logfile per thread started, right?