Branch :
Patch from Debian: "use system gsl", see https://sources.debian.org/patches/k2pdfopt/2.55%2Bds-2/0008-willuslib-gslpolyfit.c-use-system-gsl.patch/ Index: willuslib/gslpolyfit.c --- willuslib/gslpolyfit.c.orig +++ willuslib/gslpolyfit.c @@ -24,7 +24,7 @@ #include <stdlib.h> #include "willus.h" #ifdef HAVE_GSL_LIB -#include <gsl.h> +#include <gsl/gsl_multifit.h> #endif void gslpolyfit(double *x,double *y0,int n,int d,double *c0)