On Sun, Nov 10, 2019 at 10:12:06PM +0530, Herbert Laubner via blfs-support
wrote:
> I am not sure where I lost the path of the book. But compiling Mesa, the
> compilation stops in cmake
>
> Run-time dependency libdrm_amdgpu found: YES 2.4.100
> Run-time dependency libdrm_nouveau found: YES 2.4.100
> Run-time dependency libdrm found: YES 2.4.100
> llvm-config found: YES (/usr/bin/llvm-config) 8.0.1
> Run-time dependency LLVM (modules: amdgpu, bitreader, bitwriter, engine,
> ipo, mcdisassembler, mcjit, native, coroutines) found: YES 8.0.1
> WARNING: Project targetting '>= 0.46' but tried to use feature introduced in
> '0.51.0': dep.get_variable
> Run-time dependency libelf found: YES 0.177
> Program bison found: YES (/usr/bin/bison)
> Program flex found: YES (/usr/bin/flex)
> Run-time dependency libunwind found: NO (tried pkgconfig and cmake)
>
> meson.build:1513:4: ERROR: Problem encountered: OSMesa gallium requires
> gallium softpipe or llvmpipe.
>
> I have tried a newer version of mesa, which required newer version of
> libdrm, but that did not solve the issue in cmake.
>
> I found at https://www.mesa3d.org/llvmpipe.html an explanation on the how to
> create an llvmpipe driver, but I have the impression, it guides me on the
> wrong path. I assume, I made something wrong before I came to mesa, to force
> mesa to look for the galluim softpipe or llvmpipe.
>
> Any hint, where to look?
>
> Herbert
>
Maybe in the options you used. Looking at one of the versions of
mesa I have here (you didn't say which later version you were using,
beyond mentioning you tried something later) I found the following
in meson.build:
The generation of the error message -
with_gallium_softpipe = gallium_drivers.contains('swrast')
if with_osmesa != 'none'
if with_osmesa == 'classic' and not with_dri_swrast
error('OSMesa classic requires dri (classic) swrast.')
endif
if with_osmesa == 'gallium' and not with_gallium_softpipe
error('OSMesa gallium requires gallium softpipe or llvmpipe.')
endif
[snip]
So you are using gallium (good). Looks as if the reference to
llvmpipe in the message is old, because it wants whatever sets
with_gallium_softpipe.
That turns out to be set *much* earlier in meson.build -
with_gallium_softpipe = gallium_drivers.contains('swrast')
So, I assume that you have specified a subset of gallium drivers,
but excluded swrast.
Maybe we need to mention that swrast should always be included,
since we tell it to use -Dosmesa=gallium. I see we mention the need
for swrast under the explanation for gallium-nine, which we disable
be default but not under the osmesa explanation. I'll amend that in
a little while.
ĸen
--
Whilst all mushrooms are edible, the trick is to eat only those which
will prove to be edible more than once. The Celebrated Discworld Almanak
recommends you play safe and eat beans on toast.
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