Unable to use GMP with Omnet++

Question

I have installed GMP on ubuntu. I download GMP-6.1.2 from \"https://gmplib.org\".Then I extracted it in Home folder and installed like:

1. cd gmp-6.1.2
2../confi         


        

Answer 1

Assuming that you have installed libgmp using sudo apt-get install libgmp3-dev in your OMNeT++ project you have to do:

1. In header file (*.h) of simple module where you want to use gmp add:

   #include <gmp.h>
   

2. Go to Project Properties, choose OMNeT++ | Makemake | select src | Options | Custom | Makefrag and write:

   EXTRA_OBJS=-lgmp
   

To check you can add the following code somewhere in your source file, for example in initialize():

    mpz_t a, b, c;
    mpz_init_set_str(a, "123", 10);
    mpz_init_set_str(b, "458", 10);
    mpz_init(c);
    mpz_add(c, a, b);

    char * ctxt = mpz_get_str(NULL, 10, c);
    EV << "c=" << ctxt << std::endl;  // print the result
    mpz_clear(a);
    mpz_clear(b);
    mpz_clear(c);

Answer 2

I think I can do that.

I have installed gmp in ubuntu. Then I added "gmp.h" and "gmpXX.h" to my project.

After that,I went to project properties | omnet++ | select SRC | Options | link | Additional libraries to link with:(-l option) and I inserted these two Option: gmpxx , gmp .

Also,I added "/usr/local/include" in "paths and symbols(in project properties) | includes " and "/usr/local/lib" in " paths and symbols | library paths ".

After that,I added "/usr/include" in "paths and symbols(in project properties) | includes " and "/usr/lib/i386-linux-gnu" in " paths and symbols | library paths ".

And I built my project without any error.

At last,I run dear Jurzy D's example without any error.

I did not change any thing else.