gdb: No symbol “i” in current context

Question

While debugging a C program in gdb I have a breakpoint in a for loop. I cannot print the value of \"i\" ( I get : No symbol \"i\" in current context.). I can print the value of

Answer 1

It has probably been optimised out of your compiled code as you only use feature_mask[i] within the loop.

Did you specify an optimization level when you called your compiler? If you were using gcc, then just omit any -O options and try again.