1) Remove lang/gnat-aux dependency
2) USE_LANGUAGES+= ada (invokes lang/gcc-aux dependency)
3) Restore use of pkgsrc wrappers
4) Utilize custom capability of devel/gprbuild-aux Library_Options ("-R"
and "-Wl,-R" to redefine rpaths of shared libraries to remove
references to the work directory. This error was highlighted by new
updates to the PKG_DEVELOPER=yes checks.
5) Fix for Ada 2012 binding interpretation that prevented build on
lang/gcc-aux. (AI05-0115, aggregates with invisible components)
6) GPRBuild-based packages require USE_LANGUAGES+= c++ fortran in addition
to "c" and "ada" because GPRBUILD probes for these languages. If they
aren't on the language list, pkgsrc comes back with a warning message
that causes gprbuild to throw an unhandled exception due to a regex
failure. www/aws doesn't contain c++ or fortran despite the value of
USE_LANGUAGES.
and could cause problems when building as non-root, from John Marino
-put the build of demo programs (which was optionally, not switched
on per default) into its own pkg, to avoid builds in the "install"
phase and conditional PLIST entries
-misc cleanup, fix a DESTDIR glitch
