`libunwind` error while building for `aarch64-linux-android` using `ubuntu-latest`

[nikosszzz]

Hello!

I was searching for a good cross github action and I came across this fantastic action and when I try to build for Android, this error comes:

error: linking with 'aarch64-linux-android-gcc' failed: exit status: 1 | = note: LC_ALL="C" PATH="/rust/lib/rustlib/x86_64-unknown-linux-gnu/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/android-ndk/bin:/rust/bin" VSLANG="1033" "aarch64-linux-android-gcc" "/tmp/rustcYQ7k2L/symbols.o" "/target/aarch64-linux-android/release/deps/antinuke_test-f6c56bbb2cca27c4.antinuke_test.17a426cc96f3524d-cgu.0.rcgu.o" "-Wl,--as-needed" "-L" "/target/aarch64-linux-android/release/deps" "-L" "/target/release/deps" "-L" "/target/aarch64-linux-android/release/build/ring-6d28ca657858bd9f/out" "-L" "/rust/lib/rustlib/aarch64-linux-android/lib" "-Wl,-Bstatic" "/tmp/rustcYQ7k2L/libring-cfb44b8cfe867d79.rlib" "/rust/lib/rustlib/aarch64-linux-android/lib/libcompiler_builtins-cc66c9e5764dfbe4.rlib" "-Wl,-Bdynamic" "-ldl" "-llog" "-lunwind" "-ldl" "-lm" "-lc" "-Wl,--eh-frame-hdr" "-Wl,-z,noexecstack" "-L" "/rust/lib/rustlib/aarch64-linux-android/lib" "-o" "/target/aarch64-linux-android/release/deps/antinuke_test-f6c56bbb2cca27c4" "-Wl,--gc-sections" "-pie" "-Wl,-z,relro,-z,now" "-Wl,-O1" "-Wl,--strip-all" "-nodefaultlibs" = note: /android-ndk/bin/../lib/gcc/aarch64-linux-android/4.9.x/../../../../aarch64-linux-android/bin/ld: cannot find -lunwind clang90: error: linker command failed with exit code 1 (use -v to see invocation)

[autarch]

I'm not sure exactly what's going on here but I don't think it has anything to do with this action. When you build with cross, it builds inside a Docker image that runs QEMU to emulate the target arch. In this case, it looks like that Docker image is missing a library you need, libunwind. Maybe take a look at the cross docs here - https://github.com/cross-rs/cross/wiki/FAQ#linking-external-libraries

[nikosszzz]

Yup, Wasn't related to this action at all. Did some digging and found out this was fixed on cross, but not on 0.2.5, just the main branch: https://github.com/cross-rs/cross/issues/1222#issuecomment-1474110816

So, to build for ARM64 Android I'll have to wait till cross releases a version with this fix included or drop Rust to v1.67?

[autarch]

So, to build for ARM64 Android I'll have to wait till cross releases a version with this fix included or drop Rust to v1.67?

Yeah, I think that's correct.