Building Ring for Docker Alpine Targets Fails

[marceloboeira]

Building Rocket for Alpine Targets Fails

CARGO_CFG_TARGET_FEATURE = Some("crt-static,fxsr,mmx,sse,sse2")
running "musl-gcc" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-m64" "-static" "-I" "include" "-Wall" "-Wextra" "-pedantic" "-pedantic-errors" "-Wall" "-Wextra" "-Wcast-align" "-Wcast-qual" "-Wenum
-compare" "-Wfloat-equal" "-Wformat=2" "-Winline" "-Winvalid-pch" "-Wmissing-declarations" "-Wmissing-field-initializers" "-Wmissing-include-dirs" "-Wredundant-decls" "-Wshadow" "-Wsign-compare" "-Wundef" "-W
uninitialized" "-Wwrite-strings" "-fno-strict-aliasing" "-fvisibility=hidden" "-Wno-cast-align" "-fstack-protector" "-g3" "-U_FORTIFY_SOURCE" "-DNDEBUG" "-D_XOPEN_SOURCE=700" "-c" "-o/home/kurz/target/x86_64-
unknown-linux-musl/release/build/ring-8c492a09f80a0133/out/aes-x86_64-elf.o" "/usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/ring-0.13.5/pregenerated/aes-x86_64-elf.S"

--- stderr
thread 'main' panicked at 'failed to execute ["musl-gcc" "-O3" "-ffunction-sections" "-fdata-sections" "-fPIC" "-m64" "-static" "-I" "include" "-Wall" "-Wextra" "-pedantic" "-pedantic-errors" "-Wall" "-Wextra
" "-Wcast-align" "-Wcast-qual" "-Wenum-compare" "-Wfloat-equal" "-Wformat=2" "-Winline" "-Winvalid-pch" "-Wmissing-declarations" "-Wmissing-field-initializers" "-Wmissing-include-dirs" "-Wredundant-decls" "-W
shadow" "-Wsign-compare" "-Wundef" "-Wuninitialized" "-Wwrite-strings" "-fno-strict-aliasing" "-fvisibility=hidden" "-Wno-cast-align" "-fstack-protector" "-g3" "-U_FORTIFY_SOURCE" "-DNDEBUG" "-D_XOPEN_SOURCE=
700" "-c" "-o/home/kurz/target/x86_64-unknown-linux-musl/release/build/ring-8c492a09f80a0133/out/aes-x86_64-elf.o" "/usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/ring-0.13.5/pregenerated/aes-x86_6
4-elf.S"]: No such file or directory (os error 2)', /usr/local/cargo/registry/src/github.com-1ecc6299db9ec823/ring-0.13.5/build.rs:642:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace.

warning: build failed, waiting for other jobs to finish...
error: build failed
The command '/bin/sh -c cargo build --bins --release --target x86_64-unknown-linux-musl' returned a non-zero code: 101

More info
https://gist.github.com/marceloboeira/478e02894f817afb093b073a2e7466c6

As seen here: rwf2/Rocket#1046

[briansmith]

@marceloboeira If I look at the discussion in rwf2/Rocket#1046, it seems like the problem is that cc-rs defaults to using musl-gcc if the target_env is "musl", but Alpine doesn't have musl-gcc installed. Is that correct? Which compiler/toolchain should we be using instead? Any clue why cc-rs doesn't use that by default?

[marceloboeira]

@briansmith Yeap, as I've mentioned there, targeting x86_64-unknown-linux-musl works when I use ekidd/rust-musl-builder:nightly-2019-06-08 docker image from https://github.com/emk/rust-musl-builder.

[briansmith]

#713 (comment) describes the current state of musl support.