Re: core dump in ld during buildworld

On 19 Feb 2023, at 06:15, Steve Kargl <sgk@troutmask.apl.washington.edu> wrote:
> 
> On Sat, Feb 18, 2023 at 04:57:45PM -0800, Steve Kargl wrote:
>>> 
>>> At that point it is still using the system compiler and linker, and it
>>> seems that the latter is lld. Do you know which version it is?
>>> 
>> 
>> Good question.  Unfortunate ident(1) is useless in a git world.
>> 
>> % ll /usr/bin/ld.lld
>> -r-xr-xr-x  1 root  wheel  - 41754432 Jan 15 12:03 /usr/bin/ld.lld
>> 
>> This was built from source from Jan 15 2023.
>> 
>> % /usr/bin/ld.lld --version
>> LLD 14.0.5 (FreeBSD llvmorg-14.0.5-0-gc12386ae247c-1400004) (compatible with GNU linkers)
>> 
> 
> So, is there some way to rebild only ld.lld and install a new loader?
> 
> % cd /usr/src/usr.bin/clang/lld
> % make depend
> llvm-tblgen -gen-opt-parser-defs -I /usr/src/contrib/llvm-project/llvm/include -d Options.inc.d  -o Options.inc /usr/src/contrib/llvm-project/lld/ELF/Options.td
> make: exec(llvm-tblgen) failed (No such file or directory)
> *** Error code 1
> 
> How to I fix this?

Assuming llvm-tblgen has already been built (it's a bootstrap-tool),
and you have a regular setup, it should be in:

/usr/obj/usr/src/amd64.amd64/tmp/obj-tools/usr.bin/clang/llvm-tblgen/llvm-tblgen

You could try setting LLVM_TBLGEN to that path, then first build libllvm
just to be sure, then usr.bin/clang/lld:

export LLVM_TBLGEN=/usr/obj/usr/src/amd64.amd64/tmp/obj-tools/usr.bin/clang/llvm-tblgen/llvm-tblgen
make -C /usr/src/lib/clang/libllvm
make -C /usr/src/usr.bin/clang/lld

If that works, you can run make install from usr.bin/clang/lld.

-Dimitry