Besides Lisp versions of the original functions (such as hybrd1), simple interface functions that wrap user-supplied functions to make them more "Fortran-style" (eg multivariate arguments returned by copying into arrays given as parameters) and signal errors using Lisp's condition system are available (work in progress).
The package is asdf-installable. The link to the git repository is available at my homepage.
Download ASDF package from http://www.princeton.edu/~tpapp/software/minpack.tar.gz
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