The GNU Debugger, usually called just GDB,'s the standard debugger for the GNU software system. It's a portable debugger that runs on many Unix-like systems and works for many programming languages, including Ada, C, C++, FreeBASIC, and Fortran. History GDB was first written by Richard Stallman in 1986 as part of his GNU system, after his GNU Emacs was "reasonably stable". GDB's free software released under the GNU General Public License (GPL). It was modeled after the Dbx debugger, which came… (More on Gdb)