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<H1>[Mono-list] P/Invoke on amd64 was :Marshalling problems
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<B>James Fitzsimons
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</B>
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<A HREF="mailto:james.fitzsimons%40gmail.com"
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TITLE="[Mono-list] P/Invoke on amd64 was :Marshalling problems">james.fitzsimons@gmail.com
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<I>Sat, 12 Feb 2005 22:04:54 +0000</I>
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<PRE>--=-9uFeqiIVMdg8Va705SGW
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Hi Jonathan,
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On Sat, 2005-02-12 at 16:47, Jonathan Pryor wrote:
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><i> > libhighgui.so is located in /usr/local/lib. This should be fine however
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</I>><i> > as according to this <A HREF="http://www.jprl.com/interop.html#library-linux">http://www.jprl.com/interop.html#library-linux</A> if
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</I>><i> > your target library is in /etc/ld.so.cache P/Invoke should find it.
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</I>><i>=20
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</I>><i> I know what it says; I wrote it. =20
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</I>Sorry, my bad. I didn't catch that when I wrote my reply!
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><i> I also know that I have virtually zero
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</I>><i> knowledge or experience with mixed 64-bit/32-bit platforms, which
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</I>><i> Linux/Amd64 is. Consequently, my guide is somewhat lacking, if only
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</I>><i> because I don't know everything. :-)
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</I>Fair enough, I can't blame you for that ;-) To be honest, I haven't notice=
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d much=20
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difference at all between my 64 linux environment and my 32 bit enviroment.=
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Most
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things are still in the same place and work exactly as they did under a
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32bit environment.
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><i> I have heard that there are /lib64 directories that are searched for 64-
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</I>><i> bit libraries, but that's about it. Not having an AMD64 platform of my
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</I>><i> own, it's hard to test for anything else.
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</I>There is a /lib64 directory, but on my system there is a symlink from /lib =
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to=20
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/lib64 so it looks just like a normal 32 bit system.
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><i> So as an experiment, try writing a C program which uses that library,
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</I>><i> and compile/link with the 64-bit GCC (whatever that may be named), and
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</I>><i> run your C program. If this fails, which I suspect it will, you will
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</I>><i> know why Mono can't find your library. :-)
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</I>Actually I have written a bunch of C programs which compile, link and run a=
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gainst=20
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that library just fine so unfortunately that doesn't help us much.
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><i> Then, you can tell us what it takes to find the library, I can update my
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</I>><i> guide, and everyone can be happy. :-)
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</I>I wish I could. Actually as an example the little program (one of the examp=
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les from
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Mono - A developers Notebook ) I have attached runs fine in my 32 bit
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chroot but not under 64 bit. Both installations are using Mono 1.1.4=20
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built from the daily release a couple of days ago. On my 32 bit chroot
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libncurses.so lives in /lib. In my 64 bit install it lives in /lib64
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(which has a /lib symlink).
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Cheers,
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James
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--=20
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It's 5.50 a.m.... Do you know where your stack pointer is ?
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