[Bug go/63731] Fallback to netgo does not work

["ian at airs dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63731

Ian Lance Taylor <ian at airs dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-11-21
     Ever confirmed|0                           |1

--- Comment #16 from Ian Lance Taylor <ian at airs dot com> ---
Gccgo and GCC act the same on glibc systems: if you choose static linking, DNS
lookups only work if the dynamic libraries are available.

The only difference between Go and C here is that the Go library happens to
have code that will work for some people some of the time.  I don't want the
library to automatically fall back to the Go code in all cases, because in some
cases it will turn a possibly-explicable failure into a completely inexplicable
failure, and in a few cases it will turn a correct failure into an incorrect
success.

It's OK with me to make the go tool's -a option work with gccgo.  It will only
work if people have the library sources available.  If we do that, this issue
will be fixed.  I don't know how hard that would be--it might be easy.

I don't know of another good way to fix this.