Ryan Hill wrote: > Hey all. > > I'd like to add two warnings to the QA GCC warning message reporter for > GCC 4.2. > > The first is a new warning that is given when GCC makes an optimization > assuming that overflow for operations on signed ints is undefined, as > per the standard. Apparently a lot of code assumes that it will wrap > instead. The reason for this warning is the new -fstrict-overflow flag > that is enabled at >= -O2. The warning will only appear with the > -Wstrict-overflow flag set, but it is enabled by -Wall so it will be > seen pretty often. > > The other is actually a warning already present in <=4.1. 4.2 now > forbids function casts and will actually generate a runtime abort in the > code if they're used. This is bad because the code will compile fine > but then segfault when executed :(. openssl is a good example (bug > #158324). This warning is always reported, even without -Wall. I hope > this check will help identify packages that might not be GCC 4.2 ready.
If you expect these warnings to be *fixed* by developers please provide documentation to enable developers to do so. SpanKY has some docs in trunk/doc/ for this express purpose. As much as I love QA checks I really don't like forcing them on people (doubly so for a failure mode check like this) without giving people advice on how to fix them. Thanks, -Alec -- gentoo-portage-dev@gentoo.org mailing list
