devernay/cminpack v1.3.12 on GitHub

Changes in 1.3.12

Fix non-convergence / NaN in lmder, lmdif and lmstr on problems whose solution is the zero vector, by guarding a 0/0 division in lmpar (#76).
Compare test output using a numeric tolerance instead of an exact text match, so the tests pass across compilers and math libraries (#37, #77).
Fix Windows linking: correct the DLL export/import macros and document that static-library users define CMINPACK_NO_DLL (#18).
Detect and link the CBLAS interface when USE_BLAS is enabled (#12).
Add cminpackcpp.hpp, a header-only C++ wrapper so the solvers accept lambdas, functors and std::function (#74).
Make CMake the standard build system (the Makefile is kept for backward compatibility) and reorganize the tree into include/ and src/ (with src/f2c/ for the f2c conversions); remove the unmaintained Xcode, Visual Studio and Eclipse project files.
Move CI to GitHub Actions (keeping the CMake-based AppVeyor build) and remove the obsolete Travis CI, Coveralls and Coverity configuration and badges.