1) You may want to adjust the --enable-languages="c,ada,c++,f77,objc,java"
configuration option before building this package.
2) The Ada compiler front-end of gcc is itself written
in Ada. Consequently, an Ada compiler must be used
to build this pkg. In pkgsrc, lang/gcc3-ada is version
3.3 of the gcc Ada compiler; it also requires an Ada
compiler to build. This pkg may also be built from
wip/gcc-3.4-ada.
For bootstrapping, you can download a pre-built version
of gccAda-3.4.0 from:
https://www.johnrshannon.com/NetBSD/ix86/gccAda-3.4.0.tgz
https://www.johnrshannon.com/NetBSD/pentium4/gccAda-3.4.0.tgz
Both pkgs were built on NetBSD 2.0C for Intel ix86 hardware.