Solved Compilation error /opt/bin/ld: cannot find

[Fallujah]

Headers and variables have been set

Using GCC for native compilation

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file.cpp

#include<iostream>
#include<gmp.h>

using namespace std;

int main (int argc, char **argv) {

    mpz_t a,b,c;
    mpz_inits(a,b,c,NULL);

    mpz_set_str(a, "1234", 10);
    mpz_set_str(b,"-5678", 10); //Decimal base

    mpz_add(c,a,b);

    cout<<"\nThe exact result is:";
    mpz_out_str(stdout, 10, c); //Stream, numerical base, var
    cout<<endl;

    mpz_abs(c, c);
    cout<<"The absolute value result is:";
    mpz_out_str(stdout, 10, c);
    cout<<endl;

    cin.get();

    return 0;
}

opkg install libgmp
Package libgmp (6.2.1-1a) installed in root is up to date.
# find /opt/lib -name libgmp.so*
/opt/lib/libgmp.so.10.4.1
/opt/lib/libgmp.so.10
# g++ -lgmp file.cpp -o file
/opt/bin/ld: cannot find -lgmp: No such file or directory
collect2: error: ld returned 1 exit status

Need help


Solved by manually creating a symbolic link
/opt/lib/libgmp.so -> /opt/lib/libgmp.so.10

 

[ColinTaylor]

Try setting the load library path explicitly.

g++ -L/opt/lib -lgmp file.cpp -o file

If that doesn't work you might need to create a soft link from /opt/lib/libgmp.so.

ln -s libgmp.so.10.4.1 /opt/lib/libgmp.so