Coexistence of Qt3 and Qt4 development (or at least compilation)

From: Gregory Seidman (gsslist+debian_at_anthropohedron.net)
Date: 09/02/05

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To: Debian users list <debian-user@lists.debian.org>

    I have written some apps with Qt3 and I still work on them from time to
    time. I have libqt3-mt-dev installed for this purpose. I'd like to start
    working with Qt4, so I tried installing libqt4-dev. Of course, it conflicts
    with libqt3-mt-dev. Is this a permanent situation? I'd really like them to
    coexist. The same goes for qt3-dev-tools and qt4-dev-tools (or, rather,
    their dependencies).

    I understand that Qt4 has compatibility headers for Qt3, but that they are
    deprecated. Furthermore, new code is supposed to include headers without
    the .h suffix, which has been dropped to match standard C++ library
    headers. It should be possible to split off the suffix-less headers for new
    code and the headers for compatibility into separate packages, and only the
    compatibility headers should need to conflict with libqt3-mt-dev. libqt4-dev
    can become a virtual package which depends on both header packages.

    The dev tools (and dependencies) should be easy enough to deal with just by
    using alternatives.

    Does anyone see anything wrong with this?

    --Greg 

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