Issue building zstd-sys on mips-unknown-linux-musl

[Alexhuszagh]

Discussed in #1136

^{Originally posted by brentalanmiller November 14, 2022}
I'm not sure if this is a bug in cross or zstd-sys, but when I try to build a package that depends on zstd-sys, it throws an error:

error occurred: Command "mips-linux-musl-ar" "cq" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/libzstd.a" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/common/debug.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/common/entropy_common.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/common/error_private.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/common/fse_decompress.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/common/pool.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/common/threading.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/common/zstd_common.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/compress/fse_compress.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/compress/hist.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/compress/huf_compress.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/compress/zstd_compress.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/compress/zstd_compress_literals.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/compress/zstd_compress_sequences.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/compress/zstd_compress_superblock.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/compress/zstd_double_fast.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/compress/zstd_fast.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/compress/zstd_lazy.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/compress/zstd_ldm.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/compress/zstd_opt.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/compress/zstdmt_compress.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/decompress/huf_decompress.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/decompress/zstd_ddict.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/decompress/zstd_decompress.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/decompress/zstd_decompress_block.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/dictBuilder/cover.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/dictBuilder/divsufsort.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/dictBuilder/fastcover.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/dictBuilder/zdict.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/legacy/zstd_v01.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/legacy/zstd_v02.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/legacy/zstd_v03.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/legacy/zstd_v04.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/legacy/zstd_v05.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/legacy/zstd_v06.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/legacy/zstd_v07.o" "/target/mips-unknown-linux-musl/release/build/zstd-sys-fc191d4aac616782/out/zstd/lib/decompress/huf_decompress_amd64.o" with args "mips-linux-musl-ar" did not execute successfully (status code exit status: 127).

Basically, its looking for the command mips-linux-musl-ar and not mips-linux-muslsf-ar, which is strange because it used the correct version of gcc, mips-linux-muslsf-gcc.

I can work around this by simply adding a pre-build script that links mips-linux-muslsf-ar to mips-linux-musl-ar to my Cross.toml:

[target.mips-unknown-linux-musl]
pre-build = ["ln -s /usr/local/bin/mips-linux-muslsf-ar /usr/local/bin/mips-linux-musl-ar"]

But I wasn't sure if this is an issue that should be raised here or with zstd-sys.

Also related is #1100.