value has been optimized out

[18222901154]

When gdb debugger in VSCode, value has been optimized out, I want to see the value of the variable, how should it be resolved？

System：6.2.0-39-generic 4022.04.1-Ubuntu
gcc (Ubuntu 11.4.0-1ubuntu122.04) 11.4.0
g++ (Ubuntu 11.4.0-1ubuntu122.04) 11.4.0
GNU gdb (Ubuntu 12.1-0ubuntu122.04) 12.1

[misutoneko]

Rebuild with -O0 I guess...but there are also some more finegrained solutions:
https://stackoverflow.com/questions/24664865/preventing-the-optimizer-from-optimizing-a-variable-away-in-visual-studio
https://stackoverflow.com/questions/44212568/is-it-possible-to-disable-gcc-g-optimisations-for-specific-sections-of-code

And of course if everything else fails, theres always printf() debugging...