On 5 Sep 2012, at 10:31, Dimitry Andric wrote: > These are just the default FreeBSD optimization flags for building > clang, which are probably used by the majority of users out there. > This is the case that I was interested in particularly. The > -fno-strict-aliasing is not really my choice, but it was introduced > in the past by Nathan Whitehorn, who apparently saw problems without > it. It will hopefully disappear in the future.
Clang currently defaults to no strict aliasing on FreeBSD. In my experience, most C programmers misunderstand the aliasing rules of C and even people on the C++ standards committee often get them wrong for C++, so trading a 1-10% performance increase for a significant chance of generating non-working code seems like a poor gain. If people are certain that they do understand the rules, then they can add -fstrict-aliasing to their own CFLAGS. David_______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
