LabVIEW crashes in calling dynamically linked libraries

Question

I am using LabVIEW 7.1 for Linux.
I am interested in writing wrappers around Intel's OpenCV library. The Intel's OpenCV library contains image processing functions. I want to use LabVIEW in order to provide a "glue" for the OpenCV functions.
Using C, I wrote up edge.c which will display a OpenCV HighGUI (basically a GUI window) and wait for an event from the keyboard before closing. It is a very simple program. It compiles and executes correctly.
Using a Makefile, I created the Linux shared library .so file around it. A Linux .so shared library is the Linux's equivalent to the Window's DLL. I named the file edge.so .
When I use LabVIEW's Call Library Function Node, LabVIEW crashed. It just shut LabVIEW down automatically. It did not even display an error message which surprised me.
From the results of this forum message, I decided to write up a C wrapper around the .so file.
I wrote up the following code:
#include <stdio.h>
#include <stdlib.h>
#include <dlfcn.h>
int main()
   void *libhandle;
   int (*edge_func)();
   libhandle = dlopen("/home/elliot/opencv_code/edge_code/edge.so", RTLD_LAZY);
   edge_func = dlsym(libhandle, "main");
   (*edge_func)();
   dlclose(libhandle);
   return 0;
When I compiled and executed the code, it worked fine.
Since I want it to run in LabVIEW, I used LabVIEW's Code Interface Node.
I created a CIN and I have it auto create a C file.
I wrote the following code using the CIN:
#include "extcode.h"
#include <stdio.h>
#include <stdlib.h>
#include <dlfcn.h>
MgErr CINRun(float64 *Numeric);
MgErr CINRun(float64 *Numeric)
   /* Insert code here */
   void *libhandle;
   int (*edge_func)();
   libhandle = dlopen("/home/elliot/opencv_code/edge_code/edge.so", RTLD_LAZY);
   edge_func = dlsym(libhandle, "main");
   (*edge_func)();
   dlclose(libhandle);
   return noErr;
When I ran lvmkmf which is the LabVIEW function to create the necessary files, it created the necessary files and the makefile. I ran the makefile and it created the lsb file that is needed.
I used the CIN to call the lsb file. I ran the vi and again, LabVIEW crashed by closing the LabVIEW window without displaying any messages.
If anyone can help me, that will be great! I have no idea how LabVIEW is crashing without displaying any messages. I would assume when I used lvmkmf and the makefile to create the necessary files that it would catch any errors that it did not like. Did LabVIEW crashed because it did not like the call to display a GUI window?

Answer 1

From doing ldd edge.so, the dependencies (at least on the Linux box at work) are:
        libcxcore.so.0 => /usr/local/lib/libcxcore.so.0 (0x40020000)
        libcv.so.0 => /usr/local/lib/libcv.so.0 (0x40117000)
        libhighgui.so.0 => /usr/local/lib/libhighgui.so.0 (0x401ce000)
        libcvaux.so.0 => /usr/local/lib/libcvaux.so.0 (0x401eb000)
        libstdc++.so.5 => /usr/lib/libstdc++.so.5 (0x40250000)
        libm.so.6 => /lib/tls/libm.so.6 (0x40304000)
        libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x40326000)
        libc.so.6 => /lib/tls/libc.so.6 (0x42000000)
        libdl.so.2 => /lib/libdl.so.2 (0x4032e000)
        libpthread.so.0 => /lib/tls/libpthread.so.0 (0x40331000)
        libgtk-x11-2.0.so.0 => /usr/lib/libgtk-x11-2.0.so.0 (0x4033e000)
        libgdk-x11-2.0.so.0 => /usr/lib/libgdk-x11-2.0.so.0 (0x40593000)
        libatk-1.0.so.0 => /usr/lib/libatk-1.0.so.0 (0x40601000)
        libpangoxft-1.0.so.0 => /usr/lib/libpangoxft-1.0.so.0 (0x4061a000)
        libpangox-1.0.so.0 => /usr/lib/libpangox-1.0.so.0 (0x4063b000)
        libpango-1.0.so.0 => /usr/lib/libpango-1.0.so.0 (0x40648000)
        libgdk_pixbuf-2.0.so.0 => /usr/lib/libgdk_pixbuf-2.0.so.0 (0x4067b000)
        libgobject-2.0.so.0 => /usr/lib/libgobject-2.0.so.0 (0x4068f000)
        libgmodule-2.0.so.0 => /usr/lib/libgmodule-2.0.so.0 (0x406c4000)
        libglib-2.0.so.0 => /usr/lib/libglib-2.0.so.0 (0x406c8000)
        libpng12.so.0 => /usr/lib/libpng12.so.0 (0x40732000)
        libjpeg.so.62 => /usr/lib/libjpeg.so.62 (0x40755000)
        libz.so.1 => /usr/lib/libz.so.1 (0x40773000)
        libtiff.so.3 => /usr/lib/libtiff.so.3 (0x40782000)
        /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x80000000)
        libXrandr.so.2 => /usr/X11R6/lib/libXrandr.so.2 (0x407c3000)
        libXi.so.6 => /usr/X11R6/lib/libXi.so.6 (0x407c7000)
        libXext.so.6 => /usr/X11R6/lib/libXext.so.6 (0x407cf000)
        libXft.so.2 => /usr/X11R6/lib/libXft.so.2 (0x407dd000)
        libXrender.so.1 => /usr/X11R6/lib/libXrender.so.1 (0x407f0000)
        libfontconfig.so.1 => /usr/lib/libfontconfig.so.1 (0x407f8000)
        libX11.so.6 => /usr/X11R6/lib/libX11.so.6 (0x4081d000)
        libfreetype.so.6 => /usr/lib/libfreetype.so.6 (0x408fc000)
        libexpat.so.0 => /usr/lib/libexpat.so.0 (0x4094d000)