I am trying, successfully to debug it through gdb: gcc -g test.c -lds
This is not a GDB command, but a GCC one, building a file named test.c, adding debugging info and linking `libds`.
Running under GDB would look like ```console $ gdb a.out ... (gdb) run ... ```
BTW, note that Geany doesn't have any builtin debugger, but three plugins: *debugger*, *scope* and *geanygdb*, so it's unlikely to be a Geany issue. And code 127 usually means "program not found", so maybe you just don't have GDB installed?
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