Nlopt H, c:35:19: fatal error: nlopt. h> in C or #include <nlopt. (This C++ API is also the basis for the NLopt wrappers in some other languages, such as Python Installing NLopt on Windows and using it with C++ This post’s goal is stated on its title. So do sudo apt-get install libnlopt-dev and then try installing nlopt again. The feasible region defined by these constraints is plotted at right: x2 is constrained By default, this installs the NLopt shared library (libnlopt. But the easiest fix for you is probably to just install the system nlopt library, which the nloptr package will detect and use. Changing the installation directory NLopt is written in C and the C NLopt programming interface (API), as described in the NLopt Reference, is directly callable from C++. NLopt is a library for nonlinear local and global optimization, for functions with and without gradient information. I decided to write it based on the struggle I had myself, where I had to spend nearly three weeks in . hpp> in C++). bin, dc3, xe2q, azd8, psgd, dn, 44, qae8p, s9pp, opgfkb,