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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Update documentation for using custom llvm to build Mesa with Meson"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109155">109155</a>
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<th>Summary</th>
<td>Update documentation for using custom llvm to build Mesa with Meson
</td>
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<th>Product</th>
<td>Mesa
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>OS</th>
<td>Linux (All)
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>Other
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<th>Assignee</th>
<td>mesa-dev@lists.freedesktop.org
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<th>Reporter</th>
<td>shtetldik@gmail.com
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<th>QA Contact</th>
<td>mesa-dev@lists.freedesktop.org
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<p>
<div>
<pre>Current documentation at <a href="https://www.mesa3d.org/meson.html">https://www.mesa3d.org/meson.html</a> says:
<span class="quote">> LLVM
> Meson includes upstream logic to wrap llvm-config using its standard dependency
> interface. It will search $PATH (or %PATH% on windows) for llvm-config (and
> llvm-config$version and llvm-config-$version), so using an LLVM from a
> non-standard path is as easy as PATH=/path/with/llvm-config:$PATH meson build.</span >
That's really a very inflexible method, for instance you can't use different
llvm configs installed in the same directory.
As per <a href="https://github.com/mesonbuild/meson/issues/2887#issuecomment-439586787">https://github.com/mesonbuild/meson/issues/2887#issuecomment-439586787</a>
as of Meson 0.49, it's now possible to override llvm-config using --native-file
option.
Here is an example:
llvm_config=/usr/bin/llvm-config-8 # or whatever you need
read -r -d '' native_config <<EOF
[binaries]
llvm-config = "$llvm_config"
EOF
meson ... --native-file=<(echo "$native_config") ...
Please update Mesa documentation above, since this option is very obscure and
hard to find.</pre>
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