Ruby extconf.rb and autoconf (in?)compatibility

Discussion in 'Ruby' started by Rudi Cilibrasi, Sep 25, 2004.

  1. I have made a software packagae, complearn-0.6.2.tar.gz ,
    that uses autoconf and automake to manage system configuration. One of
    the standard options is:
    ../configure --prefix=$HOME/wherever/placetoinstall

    In many autoconf or automake enabled software packages written in C
    (such as GNU / FSF utilities) this creates subdirectories like
    $HOME/wherever/placetoinstall/bin for executables
    $HOME/wherever/placetoinstall/lib for libraries
    $HOME/wherever/placetoinstall/man for manual_pages

    and so on for many common naming conventions.

    Unfortunately I cannot understand how to correctly pass this option on
    to ruby mkmf:
    ruby extconf.rb

    I have seen that there is an option to make using
    a DESTDIR variable such as:
    make DESTDIR=$HOME/wherever/placetoinstall

    but then this creates deep directory structure

    and to me it seems that the /usr/local portion of the above path
    structure is redundant. Is there a way to remove it in the ruby mkmf
    extconf.rb structure? The best I can come up with so far is to use an
    mv and then an rm command to correct things, and this seems somewhat
    complicated and error-prone.

    Is there a better solution to this problem?

    Thanks for any help you can provide,

    Rudi Cilibrasi, Sep 25, 2004
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  2. Rudi Cilibrasi

    Tim Hunter Guest

    The RMagick ( build process uses the
    standard ./configure, make, make install steps. The top-level Makefile,
    though, simply calls Minero Aoki's setup.rb
    ( to do the real work. It's
    setup.rb that actually calls extconf.rb to make the "real" Makefile, runs
    make, and installs the RMagick extension.

    The ./configure step generates the top-level Makefile and inserts the value
    of any --prefix option into the Makefile such that the value is passed
    along to setup.rb via setup.rb's --prefix option. The setup.rb script does
    the actual installing.

    My explanation is probably too vague to be helpful. It's easier to read the
    code than to explain it. RMagick's CVS repository is here:

    P.S. Actually, RMagick uses an older version of setup.rb called install.rb,
    but the principle is the same.
    Tim Hunter, Sep 25, 2004
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