Archive for libc 20.1.0

[MehdiChinoune]

libcxx 20.1.0 now depends on libc source code, but unfortunately there is no tarball for libc source code.

[llvmbot]

@llvm/issue-subscribers-libc

Author: مهدي شينون (Mehdi Chinoune) (MehdiChinoune)

Details

libcxx 20.1.0 now depends on libc source code, but unfortunately there is no tarball for libc source code.

[michaelrj-google]

I asked the libc++ maintainers about this and was told that the libcxx tarball should be deprecated. @ldionne can you confirm?

[ldionne]

In the past, we've had reports of the individual projects tarballs being broken (for libc++ but perhaps for other projects too). The state of things is that most projects require being built as part of the monorepo, so distributing a "standalone" tarball of the sources of a subproject provides the false impression that the project can build in isolation. That's certainly not the case for libcxx/, libcxxabi/ and libunwind/.

For that reason, I am still of the opinion that subproject tarballs should be retired from our releases, but last time we discussed it (I can't find the Github issue anymore) I think @tstellar had reasons to want to keep them around. Perhaps he can provide additional context.

[MehdiChinoune]

We were able to build libcxx+libcxxabi+libunwind with previous releases using their sources plus the source of llvm and runtimes, without downloading the whole llvm-project.

[tstellar]

@ldionne It seems like people still use them, but I agree, it's getting a little hard at this point to construct the right tarballs especially now that we have more top-level directories, like offload, and flang-rt. We had talked about posting them elsewhere kind of like we do for the third-party binaries.

[ldionne]

We were able to build libcxx+libcxxabi+libunwind with previous releases using their sources plus the source of llvm and runtimes, without downloading the whole llvm-project.

Yes, it's definitely possible. But the set of dependencies you'll need is subject to change and we don't want to start guaranteeing any kind of stability here.

[ldionne]

Closing since there is nothing actionable here.