Replace std::assoc_legendre with boost implementation for clang builds (!428) · Merge requests · Air Shower Physics / corsika

I work on AppleClang 12.0.0.12000032. When I try to build the corsika.cpp example on master, I get the error

error: no member named 'assoc_legendre' in namespace 'std'

Apparently, this function is not included in cmath on Clang (see here)

Replace std::assoc_legendre with boost implementation for clang builds