[Bug 264783] graphics/mesa-dri pulls in the entire llvm package

From: <bugzilla-noreply_at_freebsd.org>
Date: Tue, 21 Jun 2022 12:40:37 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=264783

--- Comment #8 from Jan Beich <jbeich@FreeBSD.org> ---
(In reply to Emmanuel Vadot from comment #6)
None of the Intel drivers (crocus, iris, anv) need LLVM. libLLVM.so is only
referenced because Gallium is built as one mega driver with hard links for each
DRI name.

lang/clover inherits pinned LLVM_DEFAULT from graphics/mesa-dri which is
devel/llvm13 but devel/libclc uses devel/llvm12. Mixing LLVM bitcode is
error-prone (e.g., www/firefox + LTO vs. lang/rust) but maybe backward
compatibility is better than forward compatibility.

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