Arm64: clang error - unable to create target: No available targets are compatible with triple "bpf" about image-tools

[errordeveloper]

/xref #5

[errordeveloper]

Here is the way I've tested this:

$ cat Dockerfile.test-llvm
FROM docker.io/cilium/cilium-llvm:629310350b8cf33a1e426e167e1caadb6848f6c5 as llvm-dist

FROM ubuntu:20.04
RUN apt-get update && apt-get install -y libelf1 libmnl0 file libc-bin

COPY --from=llvm-dist /bin/llc /bin/clang /bin/
RUN /bin/llc --version
RUN /bin/clang --version

RUN echo 'int main() { return 0; }' > /tmp/test.c && clang -O2 -target bpf -c /tmp/test.c -o /tmp/test.o
$ cat Dockerfile.test-llvm | docker buildx build --platform linux/amd64,linux/arm64 --progress plain --no-cache

<SNIP>

#11 [linux/amd64 stage-1 4/6] RUN /bin/llc --version
#11 0.090 LLVM (http://llvm.org/):
#11 0.090   LLVM version 10.0.0
#11 0.090   Optimized build.
#11 0.090   Default target: x86_64-unknown-linux-gnu
#11 0.090   Host CPU: skylake
#11 0.090 
#11 0.090   Registered Targets:
#11 0.090     bpf   - BPF (host endian)
#11 0.090     bpfeb - BPF (big endian)
#11 0.090     bpfel - BPF (little endian)
#11 DONE 0.1s

#12 [linux/amd64 stage-1 5/6] RUN /bin/clang --version
#12 0.112 clang version 10.0.0 (https://github.com/llvm/llvm-project.git 1548db2d7ed11eed6b42cf31943a634be1047ba5)
#12 0.112 Target: x86_64-unknown-linux-gnu
#12 0.112 Thread model: posix
#12 0.112 InstalledDir: /bin
#12 DONE 0.2s

#13 [linux/amd64 stage-1 6/6] RUN echo 'int main() { return 0; }' > /tmp/tes...
#13 DONE 0.1s

<SNIP>

#18 [linux/arm64 stage-1 4/6] RUN /bin/llc --version
#18 0.225 LLVM (http://llvm.org/):
#18 0.225   LLVM version 10.0.0
#18 0.225   Optimized build.
#18 0.225   Default target: aarch64-linux-gnu
#18 0.225   Host CPU: (unknown)
#18 0.225 
#18 0.225   Registered Targets:
#18 0.225     aarch64    - AArch64 (little endian)
#18 0.225     aarch64_32 - AArch64 (little endian ILP32)
#18 0.225     aarch64_be - AArch64 (big endian)
#18 0.225     arm64      - ARM64 (little endian)
#18 0.225     arm64_32   - ARM64 (little endian ILP32)
#18 DONE 0.3s

#19 [linux/arm64 stage-1 5/6] RUN /bin/clang --version
#19 0.231 clang version 10.0.0 (https://github.com/llvm/llvm-project.git 1548db2d7ed11eed6b42cf31943a634be1047ba5)
#19 0.231 Target: aarch64-unknown-linux-gnu
#19 0.231 Thread model: posix
#19 0.231 InstalledDir: /bin
#19 DONE 0.3s

#20 [linux/arm64 stage-1 6/6] RUN echo 'int main() { return 0; }' > /tmp/tes...
#20 0.335 error: unable to create target: 'No available targets are compatible with triple "bpf"'
#20 0.339 1 error generated.
#20 ERROR: executor failed running [/bin/sh -c echo 'int main() { return 0; }' > /tmp/test.c && clang -O2 -target bpf -c /tmp/test.c -o /tmp/test.o]: buildkit-runc did not terminate successfully
------
 > [linux/arm64 stage-1 6/6] RUN echo 'int main() { return 0; }' > /tmp/test.c && clang -O2 -target bpf -c /tmp/test.c -o /tmp/test.o:
------
failed to solve: rpc error: code = Unknown desc = executor failed running [/bin/sh -c echo 'int main() { return 0; }' > /tmp/test.c && clang -O2 -target bpf -c /tmp/test.c -o /tmp/test.o]: buildkit-runc did not terminate successfully
$