llvmPackages.clang: Fix special-case for OpenBSD to be less special

{ lowPrio, newScope, pkgs, lib, stdenv, cmake, ninja

, preLibcCrossHeaders

, libxml2, python3, fetchFromGitHub, substituteAll, overrideCC, wrapCCWith, wrapBintoolsWith

, libxml2, python3, fetchFromGitHub, fetchpatch, substituteAll, overrideCC, wrapCCWith, wrapBintoolsWith

, buildLlvmTools # tools, but from the previous stage, for cross

, targetLlvmLibraries # libraries, but from the next stage, for cross

, targetLlvm

        # https://reviews.llvm.org/D51899

        ./clang/gnu-install-dirs.patch

        ../common/clang/add-nostdlibinc-flag.patch

        (fetchpatch {

          url = "https://github.com/llvm/llvm-project/commit/48c1364200b5649dda2f9ccbe382b0bd908b99de.patch";

          sha256 = "sha256-beSydky0P/06YDLk0GJDtcREpMcU2FspxuYU6EnQGfA=";

          stripLen = 1;

        })

        (substituteAll {

          src = ../common/clang/clang-at-least-16-LLVMgold-path.patch;

          libllvmLibdir = "${tools.libllvm.lib}/lib";