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llvm21: add AMDGPU LLVM target for Mesa radeonsi/radv (amd64-only)

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Mesa's radeonsi/radv AMD-GPU drivers require the LLVM 'amdgpu' codegen backend
(dependency('llvm', modules: [... amdgpu ...])). llvm21 built X86 only, so the
host llvm-config the mesa build reads reported amdgpu(missing). Add AMDGPU to
LLVM_TARGETS_TO_BUILD (X86;AMDGPU per the amd64-only policy — AMDGPU is a GPU
backend, not a second CPU platform). This is the redox-target LLVM whose libs
mesa links AND the source of the prefix clang-install host LLVM. NB: the
~/.redoxer toolchain host llvm-config (a provisioned prebuilt) still needs the
rebuilt AMDGPU host-LLVM propagated into it (follow-up).
This commit is contained in:
vasilito
2026-07-31 11:03:12 +03:00
parent 567b195713
commit 5d087d63bc
1 changed files with 10 additions and 4 deletions
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recipes/dev/llvm21/recipe.toml
+10 -4
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@@ -68,14 +68,20 @@ set(ENV{CFLAGS} "")
set(ENV{CXXFLAGS} "")
NATIVE_EOF
# amd64-only (see local/AGENTS.md): the CPU target is X86 (= amd64/x86_64).
# AMDGPU is the GPU codegen backend Mesa's radeonsi/radv (AMD GPU) drivers
# require via `dependency('llvm', modules: [... amdgpu ...])` — without it the
# host llvm-config the mesa build reads reports amdgpu(missing) and mesa fails
# to configure. AMDGPU is a GPU backend, not a second CPU platform, so it does
# not violate amd64-only.
case "${ARCH}" in
x86 | x86_64) LLVM_TARGETS_TO_BUILD="X86";;
aarch64) LLVM_TARGETS_TO_BUILD="AArch64";;
riscv64gc) LLVM_TARGETS_TO_BUILD="RISCV";;
x86 | x86_64) LLVM_TARGETS_TO_BUILD="X86;AMDGPU";;
aarch64) LLVM_TARGETS_TO_BUILD="AArch64;AMDGPU";;
riscv64gc) LLVM_TARGETS_TO_BUILD="RISCV;AMDGPU";;
esac
if [ "${COOKBOOK_HOST_SYSROOT}" = "/usr" ]; then
LLVM_TARGETS_TO_BUILD="X86;AArch64;RISCV"
LLVM_TARGETS_TO_BUILD="X86;AMDGPU"
fi
# This just build the LLVM library and tools just enough for Rust, to build the rest of LLVM see