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Hello,

On Sat, 8 Jun 2019, hyc@symas.com wrote:

The gcc/clang folks have their heads up their asses. They've deliberately misinterpreted the spec claiming undefined behaviors are forbidden, supposedly to enable essential optimizations. Most of which only apply to obscure corner cases in compiler benchmark suites, that nobody in the real world ever benefits from.

I realize this thread is very old, but Jeff and the C compiler folks are right. All C programs that invoke undefined behavior are illegal C programs and should be fixed.

Posix threads are well-defined by Posix standards, so calling them "undefined behaviour" is not a valid argument.

Best regards, Jokke Hämäläinen ---1463811718-806940296-1580670508=:196090--