https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103985
--- Comment #2 from Dr. Thomas Orgis <thomas.or...@uni-hamburg.de> --- You mean every call to a write(), even to a buffer variable, should be a thread synchronization point? That would mean that I swiftly should get rid of those in the performance-critical paths. I hoped it's not more elaborate than sprintf() (which is harmless, I really, really, hope;-).