how to use a shared variable in parallel computing with lsqnonlin

Is there a way to share a variable in the objective function for parallel computing with lsqnonlin optimization? The variable should be updated at the end of objective function, i.e.

[x,resnorm,residual,exitflag,output,lambda,jacobian] = lsqnonlin(@(X)ObjFunLSQnonlin(X),X0,[],[],options);

Function obj = ObjFunLSQnonlin(X)
    % doing something using sharedVariable
    obj = someFunction(X,sharedVariable);
    % updating sharedVariable
    sharedVariable = sharedVariable  + 1;
end