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Am Wed, 08 Jul 2009 16:47:57 +0200 (CEST) |
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schrieb Helmut Jarausch <jarausch@××××××××××××××××.de>: |
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|
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> Hi, |
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|
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Hi, |
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|
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> I'm in need to use some commercial software (Matlab and Maple) which |
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> come with their own (probably old) version of Java. |
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> |
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> Now, both of those software packages cannot print, they don't see any |
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> CUPS printer UNLESS I remove the symlink /usr/lib/libcups.so which |
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> points to libcups.so.2 |
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> |
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> But some GenToo packages do need that link, e.g. x11-lib/qt-gui won't |
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> install unless that link is there. |
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> |
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> I remember there is a bug with older versions of Java accessing CUPS, |
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> and probably my commercial packages contain such an old version. |
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> |
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> Does anybody know how to fix or circumvent this. |
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> (Currently I have to remove the symlink when using one of these |
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> commercial packages and reinstall it afterwards, but ... for a normal |
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> user without root priviledges that's not possible unless I write an SUID |
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> script) |
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|
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I can't speak for Maple, but for Matlab you can export the variable |
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$MATLAB_JAVA. I have |
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marcec@marcec ~ % echo $MATLAB_JAVA |
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/usr/lib/jvm/emul-linux-x86-java-1.6 |
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|
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You can check if it worked via "matlab -e" in a shell or with the following |
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Matlab command: |
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|
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EDU>> version('-java') |
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ans = |
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Java 1.5.0 with Sun Microsystems Inc. Java HotSpot(TM) Client VM mixed mode |
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|
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That's the Java that's shipped with my 2007a installation. For comparison, |
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with $MATLAB_JAVA set as above: |
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|
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EDU>> version('-java') |
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ans = |
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Java 1.6.0_13 with Sun Microsystems Inc. Java HotSpot(TM) Client VM mixed |
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mode, sharing |
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|
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I just tested printing from the editor and it works with the system 32bit JVM, |
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but not with the shipped one, so it should work for you. |
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I'm not sure about stability, though. I never used to have problems, but more |
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or less recently Matlab would SEGFAULT occasionally (even though I set this |
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variable long before the SEGFAULTs started). While using the shipped JVM, it |
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never crashed. It could be completely unrelated to the JVM being used, but I |
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think it's better to be aware of the possibility. |
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|
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> Thanks for any hints, |
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> |
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> Helmut Jarausch |
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> |
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> Lehrstuhl fuer Numerische Mathematik |
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> RWTH - Aachen University |
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> D 52056 Aachen, Germany |
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|
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HTH |
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-- |
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Marc Joliet |
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-- |
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"People who think they know everything really annoy those of us who know we |
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don't" - Bjarne Stroustrup |
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