Compiling C/C++ Programs For gdb Support

• An executable program needs to have "debug symbols" in order to be properly debugged under gdb.
• To compile a single-file program with debug info, use the '-g' flag:

  gcc -g prog.c -o prog

• The same manner works with g++ for C++ programs.
• Use '-g' also when compiling separate source files of a multi-file program.
• You don't need to compile all source files of a program with debug information...
• ... but then you'll only be able to step through the sources that were compiled with '-g'.

Originally written by guy keren