Details
Description
on nixos linux, clang's lib and include have different prefix
$ llvm-config --libdir /nix/store/srnidikg9sksfx97m5ifg2bid0icyzf3-llvm-11.1.0-lib/lib $ llvm-config --includedir /nix/store/g2fj9qmm5gh1kffpaz6zh34hba12z4b4-llvm-11.1.0-dev/include
see attachment compilersupport.cpp.patch
this will use llvm-config --includedir to locate the include dir