rfc: new libgcc build mechanism

[Mark Mitchell]

>>>>> "Richard" == Richard Kenner <kenner@vlsi1.ultra.nyu.edu> writes:

    Richard>     Well, we're going to keep it for now, anyhow.  But
    Richard> why not just use --enable-languages?  That's what it's
    Richard> for.

    Richard> Because that means I have to re-run configure and it
    Richard> changes my directories.  Many times all I want to do is
    Richard> just build some languages, leaving everything else alone
    Richard> (including the old binaries of the other languages).

So, in that case, if I understand everything, Richard's scheme might
actually do the wrong thing; you don't want libgcc to suddenly contain
different functions.  Instead, libgcc should be rebuilt using whatever
languages you specified with --enable-languages at configure time.

Basically, it doesn't make sense to use the same thing to say what
languages you want to build *right now* and what languages you want to
build ever in this tree.

--
Mark Mitchell                   mark@codesourcery.com
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