Compilation

[pavolgaj]

I tried to compile robospect under the latest Linux Mint. I got this error:
gsllm-multigauss.c: In function ‘lm_multigauss’:
gsllm-multigauss.c:180:25: error: ‘gsl_multifit_fdfsolver’ {aka ‘struct <anonymous>’} has no member named ‘J’
180 | gsl_multifit_covar(S->J,0.0,covar);
| ^~
# cc1 0.06 0.01

I think it's related with different version of libgsl. I have v2.5 in which used structure
typedef struct
{
const gsl_multifit_fdfsolver_type * type;
gsl_multifit_function_fdf * fdf ;
gsl_vector * x;
gsl_vector * f;
gsl_matrix * J;
gsl_vector * dx;
void *state;
}
gsl_multifit_fdfsolver;
changed to
typedef struct
{
const gsl_multifit_fsolver_type * type;
gsl_multifit_function * function ;
gsl_vector * x ;
gsl_vector * f ;
gsl_vector * dx ;
void *state;
}
gsl_multifit_fsolver;
It's without matrix J.

How to modify robospect file nlls-multigauss.c to work also with newer versions of libgsl?