It's set in _G_config.h, but this file doesn't include that, so in many cases the "unlocked" function was called instead. (Most of the stdc++ .cc files did have it set, though.)
It's set in _G_config.h, but this file doesn't include that, so in many cases the "unlocked" function was called instead. (Most of the stdc++ .cc files did have it set, though.)