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Using callable IDL from a Qt application [message #58675]

Thu, 14 February 2008 01:50

Tiemen
Messages: 3
Registered: February 2008

Junior Member

Hello,

I'm trying to link an existing application with IDL on linux, using
lidbidl.so. I started creating a small testing application and
everything went great, I had things up and running quite quickly.
However, the existing application uses Qt (www.trolltech.com) for its
GUI. I want to keep it that way, so I don't want to use IDLs widgets,
I only want IDL to perform some calculations on data provided by the
Qt application.

At this point the trouble started.

Compiling/linking of a small example application seems to go fine, but
starting the program gives me a lot of

"libpngerror: zlib version error"

After which my Qt GUI appears, but without any icons or graphics (as
they are in png format). My best guess is that IDL links with libpng
and/or libz statically instead of dynamically, and that therefore the
wrong zlib is used. So, the normal thing would be to recompile IDL,
but that's a bit hard with commercial software. I've looked into the
possibility to recompile Qt with another static zlib, but this gives a
lot of problems and no solution yet.

I'm using IDL 7, system zlib version: 1.2.3.

Hope you can help. If you need any more information I will of course
be happy to supply. I can supply a simple program which will
demonstrate the problem if you wish (needs Qt, and maybe it won't show
the problem if your zlib differs or so).

Thanks in advance,

Tiemen

PS Of course I've asked both IDL and Qt for support, but Qt mainly
seems to think the problem is at IDL and IDL is quite slow to reply,
so I thought about you guys :)

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[Message index]

		Using callable IDL from a Qt application By: Tiemen on Thu, 14 February 2008 01:50
		Re: Using callable IDL from a Qt application By: Tiemen on Thu, 14 February 2008 07:24
		Re: Using callable IDL from a Qt application By: Nigel Wade on Thu, 14 February 2008 06:53
		Re: Using callable IDL from a Qt application By: Tiemen on Thu, 14 February 2008 05:17

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