Linux dlerror returning error message from dlopen that I can't explain

Question

I am having trouble with the dlopen function in C++/Linux.

void * hsiftgpu = dlopen("/full/path/libsiftgpu.so", RTLD_LAZY);

I would assume that any errors that come out of dlerror() would tell me about not being able to find/open libsiftgpu.so. Here is the code where I check for errors:

if(hsiftgpu == NULL){
    std::cout << "Could not load libsiftgpu.so" << '\n';
    fprintf(stderr, "dlopen failed: %s\n", dlerror());
    return 0;
}

Instead, it tells me this:

dlopen failed: libcudart.so.6.5: cannot open shared object file: No such file or directory

I'm not super familiar with file handling in Linux, so I could be missing something obvious. I'm wondering if I need to reset something before calling dlopen, or perhaps libsiftgpu.so is calling libcudart.so.6.5? Either way, this error message doesn't make much sense to me.

I have tried adding the path to the LD_LIBRARY_PATH (even though it's not recommend for security, I just wanted to see if it would work) and /etc/lib.conf.so/ I also checked to make sure that both the executable and the .so library are compiled in the same ELF-64 format.

I have run out of ideas of things to check, and I can't explain the error message. Any guidance or possible explanations are appreciated.

Answer 1

This turned out to be a case of the executable pointing to the 32-bit library when it should have pointed to the 64-bit library. I gave points to everyone who commented.