I get the same errors on Mac OSx 10.8.2 and gcc 4.6.3 : 
xs/Roots_wrap.1.15.c:3283:7: error: void function '_wrap_gsl_root_fdfs
+olver_fdf_set' should not return a value [-Wreturn-type]
      return (gsl_nan());
      ^      ~~~~~~~~~~~

...

xs/Roots_wrap.1.15.c:3840:7: error: void function '_wrap_gsl_root_fdfs
+olver_set' should not return a value [-Wreturn-type]
      return (gsl_nan());
      ^      ~~~~~~~~~~~

[download]
This thread is a bit old. I wonder if anybody has made any progress on this?

In reply to Re^5: Install Math::GSL fail by aixtal
in thread Install Math::GSL fail by cormanaz

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