* glibc_multi: a wrapper that combines the 32-bit and 64-bit Glibcs.
This is necessary so that 64-bit GCC can find gnu/stubs-32.h and the
32-bit Glibc libraries.
To build glibc_multi on x86_64-linux, you still need either the
i686-linux Glibc derivation from a channel, or to have configured
Nix with support for forwarding the build to a i686-linux machine.
In the future this may become unnecessary by providing a prebuilt
binary of 32-bit Glibc somewhere (like the binaries used in the
stdenvLinux bootstrap).
* With glibc_multi, it becomes possible to build gcc with multilib
support (i.e. it builds 32-bit and 64-bit versions of libgcc,
libstdc++, etc.).
svn path=/nixpkgs/trunk/; revision=12203
