https://lists.freedesktop.org/archives/beignet/2020-January/009251.html
With that partial patch, the errors are LLVM 10:builtin_acos_float()clang (LLVM option parsing): for the --pgo-warn-misexpect option: may only occur zero or one times!
LLVM 11:In file included from /build/beignet-1.3.2/backend/src/llvm/llvm_sampler_fix.cpp:24: /build/beignet-1.3.2/backend/src/llvm/llvm_includes.hpp:106:10: fatal error: 'llvm/IR/CallSite.h' file not found
#include "llvm/IR/CallSite.h"
