Blumenthal, Uri - 0553 - MITLL via llvm-dev
2021-Jul-16 19:24 UTC
[llvm-dev] Clang-12 fails build on MacOS
It seems there’s a problem with parallel builds, but I don’t really know the
cause of the problem. You can see the screen log and the complete build log
here: https://trac.macports.org/ticket/63026#comment:5
iMac Pro (Intel Core i9, 10 cores), MacOS Big Sur 11.4, Xcode-12.5.1,
clang-12.0.1.
It would be great if this problem is resolved.
Thanks!
--
Regards,
Uri Blumenthal Voice: (781) 981-1638
Secure Resilient Systems and Technologies Cell: (339) 223-5363
MIT Lincoln Laboratory
244 Wood Street, Lexington, MA 02420-9108
Web: https://www.ll.mit.edu/biographies/uri-blumenthal
Root CA: https://www.ll.mit.edu/llrca2.pem
There are two ways to design a system. One is to make is so simple there are
obviously no deficiencies.
The other is to make it so complex there are no obvious deficiencies.
- C. A. R. Hoare
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.llvm.org/pipermail/llvm-dev/attachments/20210716/70107606/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/pkcs7-signature
Size: 5249 bytes
Desc: not available
URL:
<http://lists.llvm.org/pipermail/llvm-dev/attachments/20210716/70107606/attachment.bin>
The error is basically: :info:build CMake Error: failed to create symbolic link '/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_llvm-12/clang-12/work/build/projects/compiler-rt/lib/builtins/outline_atomic_helpers.dir/outline_atomic_ldadd2_1.S': file already exists Looks like this is caused by https://reviews.llvm.org/D93178 <https://reviews.llvm.org/D93178>. It seems that when you build multiple arm64 slice (in this case, arm64 and arm64e), the LSE builtin will be generated twice. In the rare case that when two same `cmake -E create_symlink` running at the same time, you get that error. Before the change, it was compiling using clang so you don't get this weird race condition. You can probably workaround by manually set `DARWIN_osx_BUILTIN_ARCHS` to remove `arm64e` since you don't really need that. At the meantime, can you file a bug report to bugs.llvm.org <http://bugs.llvm.org/>? Steven> On Jul 16, 2021, at 12:24 PM, Blumenthal, Uri - 0553 - MITLL via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > It seems there’s a problem with parallel builds, but I don’t really know the cause of the problem. You can see the screen log and the complete build log here: https://trac.macports.org/ticket/63026#comment:5 <https://trac.macports.org/ticket/63026#comment:5> > > iMac Pro (Intel Core i9, 10 cores), MacOS Big Sur 11.4, Xcode-12.5.1, clang-12.0.1. > > It would be great if this problem is resolved. > > Thanks! > -- > Regards, > Uri Blumenthal Voice: (781) 981-1638 > Secure Resilient Systems and Technologies Cell: (339) 223-5363 > MIT Lincoln Laboratory > 244 Wood Street, Lexington, MA 02420-9108 > > Web: https://www.ll.mit.edu/biographies/uri-blumenthal <https://www.ll.mit.edu/biographies/uri-blumenthal> > Root CA: https://www.ll.mit.edu/llrca2.pem <https://www.ll.mit.edu/llrca2.pem> > > There are two ways to design a system. One is to make is so simple there are obviously no deficiencies. > The other is to make it so complex there are no obvious deficiencies. > - C. A. R. Hoare > > _______________________________________________ > LLVM Developers mailing list > llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org> > https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev <https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev>-------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20210716/e8a2796c/attachment.html>