/usr/bin/comp_err

/usr/bin/comp_err  Ver 9.4.0 for Linux on x86_64 (Source distribution)
This software comes with ABSOLUTELY NO WARRANTY. This is free software,
and you are welcome to modify and redistribute it under the GPL license.
Usage:
  -#, --debug[=#]     This is a non-debug version. Catch this and exit
  -T, --debug-info    Print some debug info at exit.
  -t, --self-test=name
                      Process a number of test files.
  -?, --help          Displays this help and exits.
  -V, --version       Prints version
  -e, --in-file-errlog=name
                      Input file
  -c, --in-file-toclient=name
                      Input file
  -D, --out-dir=name  Output base directory
  -O, --out-file=name Output filename (errmsg.sys)
  -H, --header-file=name
                      mysqld_error.h file
  -N, --name-file=name
                      mysqld_ername.h file
  -N, --errmsg-file=name
                      mysqld_errmsg.h file

Variables (--variable-name=value)
and boolean options {FALSE|TRUE}  Value (after reading options)
--------------------------------- ----------------------------------------
debug-info                        FALSE
self-test                         (No default value)
in-file-errlog                    ../share/messages_to_error_log.txt
in-file-toclient                  ../share/messages_to_clients.txt
out-dir                           ../share/
out-file                          errmsg.sys
header-file                       mysqld_error.h
name-file                         mysqld_ername.h
errmsg-file                       mysqld_errmsg.h