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NAME

       DL - generate logging messages in C and C++ using a debugger

SYNOPSIS

       #include <DL.h>

       DL(format,...)

       DLG(guard,format,...)

       DLH(handler,format,...)

       DLP(param,format,...)

       DLGH(guard,handler,format,...)

       DLHP(handler,param,format,...)

       DLGHP(guard,handler,param,format,...)

DESCRIPTION

       The  DL  macro  is  used to print logging or debugging messages using a
       debugger. The nana(1) command generates  a  set  of  debugger  commands
       which  are  then  sourced  into gdb(1) to implement the logging. If you
       don’t run the executable under gdb(1) then no tracing will occur.   The
       arguments are:

       format,... - a printf(3) style argument list containing the message

       guard - print only if the guard is true.

       handler - the code that does the printing. Default: fprintf

       param - a parameter to be passed off to the handler. Default: stdout

       See nana.info for details on configuring the behaviour.

SEE ALSO

       nana-clg(1),  nana(1),  nana(3),  I(3),  DI(3),  L(3),  , Q(3) and
       nana.info.

       The nana.info file is the primary documentation for this library.

AUTHOR

       Phil Maker <pjm@gnu.org>