[FFmpeg-cvslog] r21522 - trunk/configure

[Carl Eugen Hoyos]

M?ns Rullg?rd <mans <at> mansr.com> writes:

> >> +check_cc <<EOF && enable attribute_may_alias
> >> +union { int x; } __attribute__((may_alias)) x;
> >> +EOF
> >
> > How is this supposed to work?
> > On all compilers I tested (gcc 2.95.3, icc 11.1), attribute may_alias is not
> > supported, but configure happily reports it's working.
> 
> Then the compiler is silently ignoring it, and no harm is done.

Please define silently.

Why is this attribute not set the same as all other attributes? We already know
that is currently impossible for configure to correctly test them.

Carl Eugen