on DU4.0d/alpha, gethostbyname_r is only declared with -D_REENTRANT

[Alexandre Oliva]

On Jul 19, 1999, Alexandre Oliva <oliva@dcc.unicamp.br> wrote:

> So java/net/natInetAddress.cc fails to compile with g++ 2.95 (unless
> -fpermissive is given, of course).

And it is very good that it fails to compile!  After arranging that
_REENTRANT is declared, I found out the signature is completely
different.  Here's a patch that adds support for DU4's
gethostby{name,addr}_r: