Používám verzi Dev-C++ 4.9.9.2 s knihovnou lmysql a lcurses

• First, make sure you are using a project.
• Go to Project Options - Compiler - Linker and set Generate debugging information to „yes“
• Make sure you are not using any optimization options
• check the Parameters tab, make sure you don't have any optimization options (like -O2 or -O3, but -O0 is ok because it means no optimization) or strip option (-s).
• Do a full rebuild (Ctrl-F11)
• Set breakpoint(s) where you want the debugger to stop. To set a breakpoint on a line, just click on the gutter (the gray band on the left), or press Ctrl-F5.

Zdroj: http://eilat.sci.brooklyn.cuny.edu/cis1_5/HowToDebug.htm