git: 23408297fbf3 - main - Merge llvm-project 12.0.1 rc2

[Hartmann, O.]

On Sun, 20 Jun 2021 21:56:40 +0200
Dimitry Andric <dim at FreeBSD.org> wrote:

> On 20 Jun 2021, at 15:58, Hartmann, O. <o.hartmann at walstatt.org> wrote:
> > 
> > On Sat, 19 Jun 2021 18:11:04 GMT
> > Dimitry Andric <dim at FreeBSD.org> wrote:
> >   
> >> The branch main has been updated by dim:
> >> 
> >> URL: https://cgit.FreeBSD.org/src/commit/?id=23408297fbf3089f0388a8873b02fa75ab3f5bb9
> >> 
> >> commit 23408297fbf3089f0388a8873b02fa75ab3f5bb9
> >> Merge: cac129e60300 e4bbddaec868
> >> Author:     Dimitry Andric <dim at FreeBSD.org>
> >> AuthorDate: 2021-06-19 10:06:00 +0000
> >> Commit:     Dimitry Andric <dim at FreeBSD.org>
> >> CommitDate: 2021-06-19 18:09:28 +0000
> >> 
> >>    Merge llvm-project 12.0.1 rc2
> >> 
> >>    This updates llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and
> >>    openmp to llvmorg-12.0.1-rc2-0-ge7dac564cd0e, a.k.a. 12.0.1 rc2.  
> ...
> > running  FreeBSD 14.0-CURRENT #13 main-n247423-7bd295750b1: Fri Jun 18 17:32:58 CEST
> > 2021 amd64, buildworld fails with the error
> > 
> > /usr/src/contrib/llvm-project/clang/lib/Basic/SourceManager.cpp:1256:10: fatal error:
> > 'emmintrin.h' file not found
> > 
> > How can I fix this?  
> 
> I have never been able to figure out why some people encounter this,
> except that they seem to have manually deleted files from their base
> system, thereby effectively destroying their toolchain.

I think in my case it is very simple - first of all: thanks for the explanation, the
folder "/usr/lib/clang/" is empty and that is the result of "make delete-old".

The running system as shown above has llvm 12.0.0 and I forgot to run "make delete-old"
days ago when FreeBSD 14-CURRENT moved towards 12.0.0. Obviously, there was anlther move
towards 12.0.1 today or yesterday, I pulled the sources and did a rebuild of the whole
system - and issued then make delete-old. That renders the system unusabel. Desperate and
not with the full understanding what happened before your mail, I also made a "make
cleanworld" to "rebuild/rescue" the system - with the result reported here. Havoc.
> 
> Normally these intrinsics headers are in /usr/lib/clang/X.Y.Z/include,
> and you have to explicity rm -rf this directory to make them disappear.
> Or maybe, if you install the base system via pkg, you can uninstall the
> toolchain package?
> 
> In both cases, you'll have to find a backup of that directory, and
> restore it. Or reinstall it from the installation media. With pkg-base,
> you might be able to reinstall the toolchain package (if it exists).

I have neither of that handy (data only, not the system).

oh
> 
> -Dimitry
> 

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