How to get libclang.dll compatible with llvm-mingw?

[mirek-fidler]

I wonder how to get compatible libclang.dll (that is stable C API to clang) with this toolchain?

Context: We have been using libclang.dll from win32 llvm, but that one is really configured for Visual C++ headers and libraries (well, predefined macros are). We simply redefine those macros for llvm-mingw, but recently have run into issues on certain cpus (really!) where libclang seems to detect some CPU features (like evex512 or missing it, hard to say) and then parsing fails with error in intrinsics headers. So I guess it is time for proper solution.

[mstorsjo]

The build actually already builds a libclang.dll, but we omit it from the installed files as we normally don't need it here (and it's a nontrivial size of >30 MB).

With a tiny tweak, removing libclang.dll from this line in strip-llvm.sh, you'll get a build that includes it:

cd bin
for i in amdgpu-arch bugpoint c-index-test clang-* [...] libclang.dll *LTO.dll *Remarks.dll *.bat; do

For unix builds, you'd need to tweak the following lines instead:

for i in *.so* *.dylib* cmake; do
    case $i in
    liblldb*|libclang-cpp*|libLLVM*)
        ;;
    *)
        rm -rf $i
        ;;
    esac
done

[mirek-fidler]

Perfect, I thought it must be something like that, thank you.