Re: Problem with 64 bit gtk binaries in Win 7 (32 bit works fine)

[Jaroslav ÅmÃd <jardasmid gmail com>]

Mingw64 defaults to no leading underscores (this is quite new
feature), make sure GTK+ libraries are compiled by mingw64 version
built after this was done. If you use newer mingw64 and older GTK+ or
vice versa - trouble ahead :-)


On Tue, Nov 2, 2010 at 9:03 AM, Mario M <maqueo mario gmail com> wrote:
> Hello, I have Windows 7 64 bits and I am working on a GTK+ project that uses
> OpenGL in C++. I am using GLADE and the normal version of GTK+ (not gtkmm).
>
> I was working on a laptop with Windows 7 32 bits and the program worked
> fine, but the video card in that laptop was really bad (Intel, integrated)
> so I switched to a desktop with 64 bit windows and a better video card
> (Nvidia GT 240).
>
> The code compiles fine in both versions of windows, using the 32 bit version
> of gtk. However, some horrible things have been happening:
>
> - The OpenGL window would not update correctly, taking a long time to do so,
> seemingly at random times. ÂI was using gtkglext for the OpenGL binding but
> I found out this problem was caused by gtkglext not being updated (since
> 2006) and the problem is with Aero in Windows, If desktop compositing was
> disabled, it would work fine. I decided to ditch gtkglext and use OpenGL
> directly, after a while I managed to and this problem was fixed.
>
> - Some colors were messed up with lighting enabled, at first I thought this
> and the previous problem had to do with the video card, but this was weird
> because the same program without gtk would work fine. However I managed to
> correct it adding a few simple OpenGL instructions. I'm not sure why it
> worked fine without GTK+, but it seems to work fine now with my fix.
>
> - I have a library for loading 3d models, in my laptop it worked fine, but
> on the new computer (and another one where i tested it), the 3d models
> render as a single horizontal :S, all of them. They are drawn using openGL
> functions and storing the vertex positions in lists. I discovered this: When
> I load an object in the main.cpp file, and draw it, it works fine, however,
> when I load it in an external file, and draw it, it doesn't work ( I get
> just a horizontal line, and again, without gtk+ it works fine). This has me
> really perplexed, I think it might have something to do with the linker but
> I have no idea how. I added some debugging and I think the problem is in the
> vertex positions, I printed their x,y,z values and they seemed to have x
> position in -1,0,1 and the y and z positions were values like 3.43e-039, I
> think the pointers might be messed up but I don't know how to fix them :S. I
> manually drew a triangle in the file that draws the 3d models, and the
> triangle rendered fine. I
>
> I thought this might somehow have something to do with using a 32 bit
> version of gtk+, do you think that is the case?
> I downloaded the 64 bit binaries, and tried to compile my code, but the
> linker didn't find any function! As soon as I changed the library location
> to point to the 64 bit version, I got a load of "undefined reference"s for
> everything concerning gtk+, even if I manually added the libraries in the
> project configuration of my IDE it would say the same.
>
> I am using Code::Blocks as an IDE and MingW as the compiler.
>
> Do I need to change additional configuration to use the 64 bit version of
> gtk+? Please help me, I haven't slept in two days trying to solve this and I
> am still confused. I downloaded the latest 64 bit version and then an older
> one to see if it was broken, but the results were the same.
>
> Or is the problem not related to the 64 bit thing? Any ideas/thoughts are
> welcome.
>
> Thanks in advance for your time.
>
> Mario Maqueo
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-- 
Jaroslav ÅmÃd