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Modernized Minpack: for solving nonlinear equations and nonlinear least squares problems

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Wrt the Minpack Python bindings, the README says ``` If you already have a minpack installation, e.g. from conda-forge, you can build the Python extension module directly without cloning this...

I have read the tester.c file and it will work within the repo environment. If somebody is going to use the library in their own code, additional information is perhaps...

It is possible (and maybe planned) to add a cmake support ? Or is there any technical reason blocking this support in the current time ?

### Description * When `minpack` is the main `meson` project, using `install-mod.py` to install the `*.mod file`, `meson install` will be expected. * When `minpack` is a `meson` subprojects project,...

Currently, we are using double precision. Consider having the option of: 1. exporting multiple precisions 2. specify the precision via preprocessor flag For 2, I usually would do something like...

enhancement

Assuming the [C interface](https://github.com/fortran-lang/minpack/blob/main/include/minpack.h) of MINPACK is used in C++ program, should the callback types also have C linkage specified? ```cpp extern "C" { //

Almost all Fortran compilers today support the Fortran 2008 standard, and `minpack` uses the Fortran 2018 syntax for error stop in the pure function. Given that some users are not...

Follow on to #40. Consolidate all the duplicated code from the various units tests.

tests

Should we have an option to provide the callback functions with deferred shape arrays rather than the current explicit shaped ones? Of course we want to retain the old API...

refactoring

I have archived the https://github.com/certik/minpack repository and moved the open issue from there to here. What remains is to port all the improvements that were implemented there over to this...

enhancement