Hey Kaleb,

don't worry about, it was really my fault. Such a stupid mistake, but I was too determined on the idea that the problem would be caused by something bigger.
Everything works now and makes sense . Thank you very much! I am trying to get the code to run on the board now.
I had some troubles configuring the library to cross-compile for sparc-rtems but I got something working now.

Out of interest:
I was using --enable-mcapi, but it requires me to define --with-libz and I cannot do that, because I can't cross compile libz for sparc-rtems. If I don't use --enable-mcapi, I get undefined references for both wc_AesCtrEncrypt and wc_AesSetKeyDirect. After searching through the configure file, I realised the necessary defines are set with --enable-fortress as well, so I am using that instead. Is there a reason theres nothing like --enable-ctr ? At least to me it was not obvious that I had to use --enable-fortress, maybe this could be made more obvious/added to the documentation ?

Best Regards
telina

Hello,

I was indeed not including the options.h and just set the flags I need myself. I deleted all of them and included the wolfssl/options.h instead but it did not make a difference.
I am working on Debian Linux:

$ uname -a
Linux dev 3.16.0-4-amd64 #1 SMP Debian 3.16.39-1+deb8u2 (2017-03-07) x86_64 GNU/Linux

and I configured with the following flags:

with generated the options.h attached to this post. It should be noted that I also wrote code for running AES with different modes of operation using fastmath without problems. In the future, this code is supposed to run on a board and I did cross compile the AES-tests with fastmath for it without problems, too.
After configuration I run make clean, make, sudo make install..

When I encountered this error in my code I tried to run a more simple example code taken but adjusted from the test.c.

#include <wolfssl/wolfcrypt/aes.h>
#include <wolfssl/wolfcrypt/dh.h>
#include <wolfssl/options.h>

void
simple_test()
{
    size_t testVal = 23;
    WC_RNG rng;
    int    ret;
    ret = wc_InitRng(&rng);
    DhKey  smallKey;

    byte   p[2] = { 0, 5 };
    byte   g[2] = { 0, 2 };
    byte   priv[2];
    word32 privSz = sizeof(priv);
    byte   pub[2];
    word32 pubSz = sizeof(pub);
    
    printf("testval is %zi\n", testVal);
    wc_InitDhKey(&smallKey);
    printf("testval is %zi\n", testVal);

    ret = wc_DhSetKey(&smallKey, p, sizeof(p), g, sizeof(g));
    if (ret != 0)
        printf("Error");

    ret = wc_DhGenerateKeyPair(&smallKey, &rng, priv, &privSz, pub, &pubSz);
    wc_FreeDhKey(&smallKey);
    if (ret != 0)
        printf("Error");
    
    wc_FreeRng(&rng);
    wc_FreeDhKey(&smallKey);
}

int main(int argc, char** argv) 
{
    simple_test();
   
    return 0;
}

I am using netbeans with its default generated Makefile. The compilation process looks like this

And the output like this:

I might have found something: Netbeans showed that there are 'unresolved includes' in wolfssl/wolfcrypt/dh.h leading to integer.h and to mpi_class.h, but I don't know what to do about it.

Hope that helps,
telina