I forgot to undo a gcc46 unneeded change.
Undoing glibc 2.13 work for the pi

(previous attempt of bootstrapping from the armv5tel bootstrap tools)
Undoing more glibc unneeded changes
Removing a glibc outdated mention in stdenvLinux
Adding the armv6l bootstrap; I forgot that file in previous commits.
Going with armv6l-linux bootstrap-tools.

I had lost this change in some branch.
gcc4.7: making the cross-built gcc respect withAbi, withArch, ...
The glibc doesn't like "gnueabihf" in the triplet.

I better set "gnueabi".
Setting a public URL for the pi bootstrap tools
gcc46: moving the bootstrap logic into nix

It was in the builder.sh.
gcc47: moving the bootstrap logic into nix

It was in the builder.sh. Similar to the previous patch
to gcc46.
Merge pull request #229 from viric/niximpure2-stdenv-updates

Allow /niximpure/impure.sh impurity, only for users wanting it
gcc46: moving the bootstrap logic into nix

It was in the builder.sh.
gcc47: moving the bootstrap logic into nix

It was in the builder.sh. Similar to the previous patch
to gcc46.
Merge branch 'stdenv-updates' into pi-stdenv-updates
Removing unneeded changes in stdenvLinux, for the pi.

I had those changes from the time when I wanted to bootstrap
its stdenvLinux from armv5tel bootstrap-tools. But that
never worked.
Adding linux-3.6-rpi

I picked the change from
https://github.com/aforemny/nixpkgs/commit/7b4d69eeff2eb10c395c8d1a52a0c1e246cddb45
stdenv: Stripping out/lib32 too

If not, in mips64/n32, lib32/libiberty.a was left without stripping, and
it contained (debug) references to bootstrap-tools.
Revert "Merge pull request #229 from viric/niximpure2-stdenv-updates"

This reverts commit e04b17bfbaa4dbd5252d59f727d7d84ffe25f568, reversing
changes made to 1af2ada7d4c61e79356a0f3f8bcced6159a6e751.
Add an option ‘stdenv.userHook’ to set a global stdenv setup hook

This allows various applications.  It allows users to set global
optimisation flags, e.g.

  stdenv.userHook = ''NIX_CFLAGS_COMPILE+=" -funroll-loops"'';

But the impetus is as an alternative to issue #229, allowing impure
stdenv setup for people who want to use distcc:

  stdenv.userHook = "source /my/impure/setup-script.sh";

This is probably a bad idea, but at least now it's a bad idea in
people's configuration and not in Nixpkgs. :-)