/usr/bin/ld: cannot find -lgmp

Hi all,

I'm interested in using the GNU Multiple Precision library so I can work with big numbers however after a successful installation I can't run an example code.

My code is as follows:

Code:

#include <stdio.h>								/* for printf */
#include </state/partition1/home/mcdonnellj/assignmentB/gmp-5.0.5/gmp.h>

int main( int argc, char *argv[] )
{
	mpz_t a, b;                 				/* working numbers */
	if( argc < 3 )
	{											/* not enough words */
		printf( "Please supply two numbers to add.\n" );
		return 1;
	}
	mpz_init_set_str( a, argv[1], 10 );			/* Assume decimal integers */
	mpz_init_set_str( b, argv[2], 10 );			/* Assume decimal integers */
	mpz_add( a, a, b );							/* a=a+b */

	printf( "%s + %s => %s\n", argv[1], argv[2], mpz_get_str ( NULL, 10, a ) );
}

But when I run it using the 'gcc -o test test.c -lgmp -lm' command as specified I get the following error:
/usr/bin/ld: cannot find -lgmp

Does anybody know where I'm going wrong?

Given the strange path for your #include, you didn't install gmp in the usual place.

So perhaps you need
gcc -L/state/partition1/home/mcdonnellj/assignmentB/gmp-5.0.5/lib -o test test.c -lgmp -lm

Well, the -L option should be the directory where libgmp.a resides.

Likewise, you should have
#include <gmp.h>

And use the -I/path/to/somewhere option to tell the compiler where to find the header file.