v2.9.1

• Fixed PRAXIS box constraints ([#528])

v2.9.0

• New NLOPT_LUKSAN cmake option to build without Luksan LGPL code (#568).

• Dropped unused LD_LBFGS_NOCEDAL enum value.

• Python 3.13 support (#565).

• Fixed COBYLA not returning the optimum (#57)

• Fixed SLSQP returning infeasible optimum (#368)

• Fixed STOGO not registering new optimum (#504)

• Various minor bugfixes (#570, #563, #379, #511)

NLopt 2.8.0

• Support C++ functors for objective functions (#457).

• CCSA/MMA an now use the initial_step parameter to bound their initial stepsize,
  and also expose a new internal parameter rho_init (#561).

• Install pkg-config file on Windows (#534).

• Allow having more equality constraints than there are variables (#509).

• Bugfixes to nlopt_algorithm_name (#558), Matlab NLOPT_GN_AGS (#533), forced stop for empty dimensions (#473), SLSQP (#465), and build improvements (#551, #535,#510, #445…).

NLopt 2.7.1

• Various minor bugfixes (#268, #409, #420) and build
  improvements (support Octave 6.x, Guile 3.x, Cmake 3.2).

NLopt 2.7.0

• New nlopt_set_param API for setting internal algorithm parameters ([#365]).

• Avoid library-symbol conflicts ([#355], [#361])

NLopt 2.6.2

• Fixed forced stop exception with dimension elimination ([#317])

• Fixed get_initial_step wrapping ([#319])

• Various build fixes ([#314], [#308], [#303], [#278])

NLopt 2.6.1

Fix nlopt_version return value for 2.6.x and update soname and docs.

NLopt 2.6.0

New set_upper_bound and set_lower_bound functions in the low-level C API to set one bound at a time (#257). There is no longer a separate libnlopt_cxx library — C++ algorithms (stogo) are compiled and included by default (#198). Various build fixes (#197, #216, #245, #250, #230, #261, etc.), other fixes (#242, #258).

NLopt 2.5.0

See NEWS: switch to cmake, various new functions, a new algorithm…

nlopt-2.4.2

copyright year update for 2014