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

[Dimitry Andric]

On 20 Jun 2021, at 22:53, Hartmann, O. <o.hartmann at walstatt.org> wrote:
> 
> 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.

Ah yes, at least it is now clear that was the problem. Always run
"make delete-old" *after* installworld, etcupdate and so on, as the very
last step.

Or even better, run "make check-old" and use the list of files and
directories it outputs, so you can optionally make a backup of those
first. I can remember instances of ports not starting up anymore,
because they were still linked to some old system library that had been
cleaned up...

-Dimitry

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