I got the following error:
CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
F2C_LIBRARY
linked by target "special_functions" in directory ../ngsolve-src/ngs-special-functions/src
-- Configuring incomplete, errors occurred!
Is it due to my outdated version of Ngsolve?