MaskRay added a comment. In D143306#4144396 <https://reviews.llvm.org/D143306#4144396>, @JonChesterfield wrote:
> So what is this configuration file? Joseph found a Gentoo blog post > https://blogs.gentoo.org/mgorny/2022/10/07/clang-in-gentoo-now-sets-default-runtimes-via-config-file/ > and I don't have a clang.cfg file in my install dir `clang.cfg` is not provided by default. You can create it for your needs. The official doc is https://clang.llvm.org/docs/UsersManual.html#configuration-files > Tests in clang look like it's a text file that you write command line flags > into and hopefully clang applies them, so if we write `-Wl, rpath` etc in > that text file and successfully distribute it to users, it'll behave > identically to setting rpath from clang and fedora will still be unhappy (I > don't see how to scope a flag to only -fopenmp, so it might set rpath on > every executable clang builds instead of only openmp ones, which will break > some applications and fail the rpm build check on all of them) > > I don't see how this helps anything? It's different. With the current status quo, `-fopenmp-implicit-rpath` is the default and affects all distributions which include users adverse to magic `DT_RUNPATH` tags. If you specify `-Wl,-rpath=...` in your build (possibly HPC related), it just affects your system, and Fedora and others (like I) won't complain. `clang -fuse-ld=lld -fopenmp=libgomp -fno-openmp-implicit-rpath a.c -o a` > I'm trying to work out how this works for libc++ and the like and as far as I > can see it doesn't - I think the binaries I've built go looking for libc++ in > the system libraries and totally ignore the one built as part of the > toolchain. I never noticed this because I statically link everything, am I > missing something here? This is the point. Specifying a driver option to use libc++/libc++abi/libunwind doesn't magically change `DT_RUNPATH`. This is exactly the behavior a user wants for a system Clang. It does make users with a non-system Clang inconvenient but that's the point that such users should specify rpath by themselves. openmp should not diverge from libc++/libc++abi/libunwind in this regard. Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D143306/new/ https://reviews.llvm.org/D143306 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
