282 

   283 * Useful program logging.

   284 

   285 Put first line to your log file, you must replace default-directory to dir where you build program:

   286 

   287   -*- mode: compilation-minor; mode: auto-revert-tail; default-directory: "~/devel/proj" -*-

   288 

   289 Program must use one of supported by 'compilation-minor-mode' (see

   290 'compilation-error-regexp-alist'), like:

   291 

   292   printf(__FILE__ ":%d: %s\n", __LINE__, msg);  /* msg - user defined string */

   293