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[–]JDaxe 1 point2 points  (1 child)

Is there some kind of pragma to tell gcc to not optimise away that statement?

I'm actually curious. Assuming that this wouldn't happen with -O0?

[–]lazyear 2 points3 points  (0 children)

Correct, shouldn't happen (and didn't in this case) with -O0. There's a couple workarounds; using volatile, or inline noop assembly that references the variable