Hi All, I am new to gcc (used other C compilers before). I have construct of the like in my C code . . . if(cond) { e=e; } . . The reasoning here is that I need to stuff a GDB break point on e=e; cond goes from false to true after some long to wait condition occurs. Basically my debug session goes like this set a temp break in this function reach it, then stick a BP on e=e, then run and wait the BP. The e=e; comes form the idea that I reuse here whatever int scalar is in the vincinity. I tried to compile with -O0 but to no joy gcc always remove my 'NOP' intruction knowing better than me what I could do with it. Is there any other idioms I should use, may be an asm("nop") or the like I guess ? Thanx in advance Cheers, Phi