[Qt-jambi-interest] Using the system qt4 libs

[Eskil Abrahamsen Blomfeldt]

Dusan Zatkovsky wrote:
>>> For us, this is made more difficult by the fact that a fair share of
>>> Linux distributions have Qt 4 pre-installed to support KDE 4, and by
>>> the fact that Qt Jambi requires certain build flags to be set to work
>>> around bugs in the JVM, which makes it binary incompatible with the
>>> standard installation of Qt.
>>>       
>
> Could you explain it shortly, please? What kind of jvm bugs?
>
>   

The JVM in Sun's JDK 5 on Linux has a bug causing a memory corruption if 
Qt is built with SSE instructions, so when configuring Qt to use with Qt 
Jambi, you need to add "-no-sse" and "-no-sse2" to avoid the bug.

Helge is absolutely right that we have not seen this bug with newer 
versions of Java, so with a dependency manager the correct solution is 
probably to use the system Qt version and add a dependency on Java 6.

-- Eskil