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Squashed commit of the following:

commit 929bc31a
Author: Łukasz Nowak <luke@nexedi.com>
Date:   Fri Sep 23 15:52:48 2011 +0200

    Freeze versions.

    Driven by correctly working Vifib code.

commit 8f0bb8ae
Author: Łukasz Nowak <luke@nexedi.com>
Date:   Fri Sep 23 15:09:30 2011 +0200

    Froze external resource version.

    Since long time both never changed, so it seems easier to have them in frozen
    state.

commit 51fa4920
Author: Łukasz Nowak <luke@nexedi.com>
Date:   Fri Sep 23 13:06:27 2011 +0200

    Partially revert de6adaeb

    Keep original intention of extending gcc, but as there are problems with
    libc conflict (libppl is linked against system libc, but later used with
    old gcc provided libc, and detects features not available in old version
    of libc) provide trimmed down gcc in order to compile ...