[Mesa-users] Building Mesa with LLVM in $HOME/opt

[Jackman]

Thank you for your suggestions!

After digging around, trying to find the mechanism (method) the Meson was
actually using to find the dependencies, I was stuck, unable to determine
what 'config-tool' meant. After reading the documentation, I concluded that
I could manipulate 'cmake' or 'llvm-config' methods, something I
understood. On my first attempt at a fix, I decided to just comment out the
method altogether, using Meson's default 'auto' method:

dep_llvm = null_dep
with_llvm = false
if _llvm != 'false'
  dep_llvm = dependency(
    'llvm',
    version : _llvm_version,
    modules : llvm_modules,
    optional_modules : llvm_optional_modules,
    required : (
      with_amd_vk or with_gallium_radeonsi or with_gallium_swr or
      with_gallium_opencl or _llvm == 'true'
    ),
    static : not _shared_llvm,
#    method : _llvm_method,
    fallback : ['llvm', 'dep_llvm'],
  )
  with_llvm = dep_llvm.found()
endif


Now, I am sure that there was very good reason to use 'config-tool', but I
just don't know what it means. In the context of my system with my putting
LLVM in my $HOME/opt folder, 'auto' seems to work just fine.

Right now I'm re-compiling LLVM with RTTI enabled because now it's
complaining about that.

I'm happy to talk to developers that know more about Meson in order to
create a PR/patch for this kind of thing. I'd also be happy to test other
conditions (OSX, Windows, etc.) as long as I know what I'm looking for.

Anyway, thank you again! It takes a lot of discipline and commitment to
offer help to newcomers on a mailing list.

Have a great week and stay healthy!

Andrew Jackman
kd7nyq at gmail.com


On Sun, Apr 26, 2020 at 6:56 PM Ken Moffat <zarniwhoop at ntlworld.com> wrote:

> On Sun, Apr 26, 2020 at 05:59:04PM +0300, Ruslan Kabatsayev wrote:
> > Hi,
> >
> > On Sun, 26 Apr 2020 at 07:36, Jackman <kd7nyq at gmail.com> wrote:
> > >
> > > Good evening! I hope you are all doing well.
> > >
> > > My goal is simply to get OpenCL 1.2+ working on my MXLinux (Debian
> Buster derivative) machine with an AMD GPU.
> > >
> [...]
> > >
> > > When I try to build Mesa, however, I am still getting this error:
> > >
> > > Message: libdrm 2.4.100 needed because amdgpu has the highest
> requirement
> > > Run-time dependency libdrm_intel found: YES 2.4.101
> > > Run-time dependency libdrm_amdgpu found: YES 2.4.101
> > > Run-time dependency libdrm_radeon found: YES 2.4.101
> > > Run-time dependency libdrm_nouveau found: YES 2.4.101
> > > Run-time dependency libdrm found: YES 2.4.101
> > > llvm-config found: YES (/home/jackman/opt/bin/llvm-config) 10.0.0
> > > Run-time dependency LLVM (modules: amdgpu, asmparser, bitreader,
> bitwriter, engine, ipo, mcdisassembler, mcjit, native, coroutines) found:
> NO (tried config-tool)
> >
> > This hints that LLVM is not fully functional. In particular, if you
> > look at the section for LLVM in BLFS[1], you'll find the following
> > cmake option is used there:
> >
> > -DLLVM_TARGETS_TO_BUILD="host;AMDGPU;BPF"
> >
> > You may want to enable these targets too. Then at least the amdgpu
> > module from the list should be found (not sure if the other modules
> > listed have also not been found).
> >
>
> Just to expand on that: in BLFS we added BPF for v4lutils.  The
> AMDGPU target has been needed (for amdgpu, which the OP is trying to
> enable) for a long time.  But we don't build any more than llvm,
> clang and compiler-rt so it is possible that one of the other parts
> of llvm might need another target.
>
> For mesa itself, we have some explanation of the options - maybe
> useful to reduce how much gets built.  I think we removed the new
> iris target earlier, because of segfaults, or else we are going to
> (not relevant to amdgpu, nor to previous versions of mesa).
>
> OTOH, if someone is building all of it then perhaps the full set of
> drivers might be what they want - for me, building more than I need
> wastes time and space, but YMMV.
>
> ĸen
> --
> He could send for Ptraci, his favourite handmaiden. She was special.
> Her singing always cheered him up. Life seemed so much brighter when
> she stopped.   -- Pyramids
> _______________________________________________
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> mesa-users at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/mesa-users
>
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