uses /usr/lib/libstdc++.dylib, and so we get segfaults when using
Perl modules that depend on another libstdc++.dylib (like Nix's Perl
bindings). It doesn't appear that libutil provides useful
functionality for Perl on Darwin.
svn path=/nixpkgs/branches/stdenv-updates/; revision=32364
libraries in /usr/local/lib, but the linker doesn't look there by
default, so linking against libgdbm failed. So don't look in
/usr/local/lib.
svn path=/nixpkgs/branches/stdenv-updates/; revision=31741
