[Bug go/46986] Go is not supported on Darwin

[ian at airs dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46986

--- Comment #26 from Ian Lance Taylor <ian at airs dot com> 2012-02-16 15:48:18 UTC ---
I think it would be great if somebody would tell me something I can used
instead of makecontext/getcontext/setcontext.  Unless somebody can come up with
one, then I think the only alternative is to write our own processor-specific
versions and distribute them with libgo.

The functions were removed from POSIX not because there was any adequate
replacement, but because they suffer from some design deficiencies.