Missing intrinsic functions on aarch64/armv7 musl

[NobodyXu]

Checklist

• I've looked through the issues and pull requests for similar reports

Describe your issue

When using -Z build-std=std,panic_abort -Z build-std-features=panic_immediate_abort on nightly, the CI for armv7-unknown-linux-musleabihf failed with:

error: linking with `arm-linux-musleabihf-gcc` failed: exit status: 1
  |
  = note: "arm-linux-musleabihf-gcc" "/rust/lib/rustlib/armv7-unknown-linux-musleabihf/lib/self-contained/crt1.o" "/rust/lib/rustlib/armv7-unknown-linux-musleabihf/lib/self-contained/crti.o" "/rust/lib/rustlib/armv7-unknown-linux-musleabihf/lib/self-contained/crtbegin.o" "/tmp/rustchhh9b4/symbols.o" "/target/armv7-unknown-linux-musleabihf/release/deps/cargo_binstall-3e50bf6da12c20a5.cargo_binstall.a21ddfed-cgu.0.rcgu.o" "-Wl,--as-needed" "-L" "/target/armv7-unknown-linux-musleabihf/release/deps" "-L" "/target/release/deps" "-L" "/target/armv7-unknown-linux-musleabihf/release/build/bzip2-sys-c8079e4346e62d12/out/lib" "-L" "/target/armv7-unknown-linux-musleabihf/release/build/ring-ebc6c8a01f6ba0cc/out" "-L" "/target/armv7-unknown-linux-musleabihf/release/build/libz-ng-sys-f0f6c53a33219098/out/lib" "-L" "/target/armv7-unknown-linux-musleabihf/release/build/lzma-sys-b43b0fc572ecbfdb/out" "-L" "/target/armv7-unknown-linux-musleabihf/release/build/zstd-sys-2590e47ee852bb0f/out" "-L" "/rust/lib/rustlib/armv7-unknown-linux-musleabihf/lib" "-Wl,-Bstatic" "/tmp/rustchhh9b4/libzstd_sys-f7d06c8757472495.rlib" "/tmp/rustchhh9b4/liblzma_sys-2e2684a73a1d7334.rlib" "/tmp/rustchhh9b4/liblibz_ng_sys-3508004d4f9f58ad.rlib" "/tmp/rustchhh9b4/libbzip2_sys-d3cb4d953a9c8aa6.rlib" "/tmp/rustchhh9b4/libring-4ed7a44158b48a92.rlib" "-Wl,--start-group" "-lunwind" "-lc" "-Wl,--end-group" "/target/armv7-unknown-linux-musleabihf/release/deps/libcompiler_builtins-6e6f29f70316d02a.rlib" "-Wl,-Bdynamic" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-nostartfiles" "-L" "/rust/lib/rustlib/armv7-unknown-linux-musleabihf/lib" "-L" "/rust/lib/rustlib/armv7-unknown-linux-musleabihf/lib/self-contained" "-o" "/target/armv7-unknown-linux-musleabihf/release/deps/cargo_binstall-3e50bf6da12c20a5" "-Wl,--gc-sections" "-static" "-no-pie" "-Wl,-zrelro,-znow" "-Wl,--strip-all" "-nodefaultlibs" "/rust/lib/rustlib/armv7-unknown-linux-musleabihf/lib/self-contained/crtend.o" "/rust/lib/rustlib/armv7-unknown-linux-musleabihf/lib/self-contained/crtn.o"
  = note: /usr/local/bin/../lib/gcc/arm-linux-musleabihf/9.2.0/../../../../arm-linux-musleabihf/bin/ld: /tmp/rustchhh9b4/liblibz_ng_sys-3508004d4f9f58ad.rlib(compare256_neon.c.o): in function `compare256_neon_static':
          compare256_neon.c:(.text.compare256_neon_static+0x28): undefined reference to `__ctzdi2'
          /usr/local/bin/../lib/gcc/arm-linux-musleabihf/9.2.0/../../../../arm-linux-musleabihf/bin/ld: compare256_neon.c:(.text.compare256_neon_static+0x42): undefined reference to `__ctzdi2'
          collect2: error: ld returned 1 exit status
          
  = help: some `extern` functions couldn't be found; some native libraries may need to be installed or have their path specified
  = note: use the `-l` flag to specify native libraries to link
  = note: use the `cargo:rustc-link-lib` directive to specify the native libraries to link with Cargo (see https://doc.rust-lang.org/cargo/reference/build-scripts.html#cargorustc-link-libkindname)

error: could not compile `cargo-binstall` due to previous error
Error: Process completed with exit code 101.

And the CI for aarch64-unknown-linux-musl failed with similar error.

What target(s) are you cross-compiling for?

aarch64-unknown-linux-musl, armv7-unknown-linux-musleabihf

Which operating system is the host (e.g computer cross is on) running?

• macOS
• Windows
• Linux / BSD
• other OS (specify in description)

What architecture is the host?

• x86_64 / AMD64
• arm32
• arm64 (including Mac M1)

What container engine is cross using?

• docker
• podman
• other container engine (specify in description)

cross version

cross 0.2.4 (4645d93 2022-07-10)

Example

cross seems to have missing intrinsic functions on aarch64/armv7 musl build when using build-std features:

cross build --target aarch64-unknown-linux-musl --profile release -Z build-std=std,panic_abort -Z build-std-features=panic_immediate_abort

It only happens if we have the build-std configurations.

Additional information / notes

This might be related to #896

This issue was discovered in cargo-bins/cargo-binstall#256 .

[Alexhuszagh]

Interestingly, this doesn't seem to reproduce in a simple package with a C++ dependency:

$ cross +nightly --version
cross 0.2.4 (678e3d7 2022-07-29)
[cross] warning: using newer rustc `1.63.0-nightly (fee3a459d 2022-06-05)` for the target. Current active rustc on the host is `rustc 1.61.0 (fe5b13d68 2022-05-18)`.
 > Update with `rustup update`
[cross] note: Falling back to `cargo` on the host.
cargo 1.63.0-nightly (38472bc19 2022-05-31)

$ git clone https://github.com/cross-rs/rust-cpp-hello-word
$ cd rust-cpp-hello-word

$ cross +nightly build --target armv7-unknown-linux-musleabihf -Z build-std=std,panic_abort -Z build-std-features=panic_immediate_abort
[cross] warning: using newer rustc `1.63.0-nightly (fee3a459d 2022-06-05)` for the target. Current active rustc on the host is `rustc 1.61.0 (fe5b13d68 2022-05-18)`.
 > Update with `rustup update`
   Compiling core v0.0.0 (/home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core)
   Compiling std v0.0.0 (/home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/std)
   Compiling rustc-std-workspace-core v1.99.0 (/home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/rustc-std-workspace-core)
   Compiling compiler_builtins v0.1.73
   Compiling libc v0.2.126
   Compiling alloc v0.0.0 (/home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/alloc)
   Compiling cfg-if v0.1.10
   Compiling rustc-demangle v0.1.21
   Compiling unwind v0.0.0 (/home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/unwind)
   Compiling rustc-std-workspace-alloc v1.99.0 (/home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/rustc-std-workspace-alloc)
   Compiling panic_abort v0.0.0 (/home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/panic_abort)
   Compiling panic_unwind v0.0.0 (/home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/panic_unwind)
   Compiling std_detect v0.1.5 (/home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/stdarch/crates/std_detect)
   Compiling hashbrown v0.12.0
   Compiling proc_macro v0.0.0 (/home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/proc_macro)
   Compiling hellopp v0.1.0 (/mnt/c/Users/ahusz/git/rust-cpp-hello-word)
    Finished dev [unoptimized + debuginfo] target(s) in 31.84s

This does fail however for aarch64-unknown-linux-musl:

error: linking with `aarch64-linux-musl-gcc.sh` failed: exit status: 1
  |
  = note: "aarch64-linux-musl-gcc.sh" "/home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-musl/lib/self-contained/crt1.o" "/home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-musl/lib/self-contained/crti.o" "/home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-musl/lib/self-contained/crtbegin.o" "/tmp/rustcgsdU4c/symbols.o" "/target/aarch64-unknown-linux-musl/debug/deps/hellopp-e18a46c88e8651c0.17yj6cbrqsa7ydok.rcgu.o" "/target/aarch64-unknown-linux-musl/debug/deps/hellopp-e18a46c88e8651c0.31ozsu1nxvk40u8p.rcgu.o" "/target/aarch64-unknown-linux-musl/debug/deps/hellopp-e18a46c88e8651c0.3jb6c2penqwbl1tw.rcgu.o" "/target/aarch64-unknown-linux-musl/debug/deps/hellopp-e18a46c88e8651c0.43s4nhow0bh4mdu7.rcgu.o" "/target/aarch64-unknown-linux-musl/debug/deps/hellopp-e18a46c88e8651c0.4jh1kcigexzy7mj.rcgu.o" "/target/aarch64-unknown-linux-musl/debug/deps/hellopp-e18a46c88e8651c0.86k6xqe3mcfnldm.rcgu.o" "/target/aarch64-unknown-linux-musl/debug/deps/hellopp-e18a46c88e8651c0.37wbsb42mhp6kphi.rcgu.o" "-Wl,--as-needed" "-L" "/target/aarch64-unknown-linux-musl/debug/deps" "-L" "/target/debug/deps" "-L" "/target/aarch64-unknown-linux-musl/debug/build/hellopp-be12ba6d38a66dd4/out" "-L" "/home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-musl/lib" "-Wl,-Bstatic" "-lhellopp" "-Wl,-Bdynamic" "-lstdc++" "-Wl,--start-group" "-Wl,-Bstatic" "/target/aarch64-unknown-linux-musl/debug/deps/libstd-2b9a1a9c35b1230a.rlib" "/target/aarch64-unknown-linux-musl/debug/deps/libpanic_unwind-d70e14d6e59177bc.rlib" "/target/aarch64-unknown-linux-musl/debug/deps/librustc_demangle-f3d5b949b7b1a5de.rlib" "/target/aarch64-unknown-linux-musl/debug/deps/libstd_detect-59b5d3ce85adba29.rlib" "/target/aarch64-unknown-linux-musl/debug/deps/libhashbrown-2f24b7025c0e4078.rlib" "/target/aarch64-unknown-linux-musl/debug/deps/librustc_std_workspace_alloc-f93333caf4316797.rlib" "/target/aarch64-unknown-linux-musl/debug/deps/libunwind-755d10c7440dc2d0.rlib" "-lunwind" "/target/aarch64-unknown-linux-musl/debug/deps/libcfg_if-22929b06043a7aec.rlib" "/target/aarch64-unknown-linux-musl/debug/deps/liblibc-3e7ed81f524f85a0.rlib" "-lc" "/target/aarch64-unknown-linux-musl/debug/deps/liballoc-64350ab48d7b62c5.rlib" "/target/aarch64-unknown-linux-musl/debug/deps/librustc_std_workspace_core-ab8f7e806a10a573.rlib" "/target/aarch64-unknown-linux-musl/debug/deps/libcore-b2d649ba95a0a0a1.rlib" "-Wl,--end-group" "/target/aarch64-unknown-linux-musl/debug/deps/libcompiler_builtins-d8af7abe78822f7d.rlib" "-Wl,-Bdynamic" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-nostartfiles" "-L" "/home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-musl/lib" "-L" "/home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-musl/lib/self-contained" "-o" "/target/aarch64-unknown-linux-musl/debug/deps/hellopp-e18a46c88e8651c0" "-Wl,--gc-sections" "-static" "-no-pie" "-Wl,-zrelro,-znow" "-nodefaultlibs" "/home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-musl/lib/self-contained/crtend.o" "/home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-musl/lib/self-contained/crtn.o"
  = note: + set -euo pipefail
          + main /home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-musl/lib/self-contained/crt1.o /home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-musl/lib/self-contained/crti.o /home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-musl/lib/self-contained/crtbegin.o /tmp/rustcgsdU4c/symbols.o /target/aarch64-unknown-linux-musl/debug/deps/hellopp-e18a46c88e8651c0.17yj6cbrqsa7ydok.rcgu.o /target/aarch64-unknown-linux-musl/debug/deps/hellopp-e18a46c88e8651c0.31ozsu1nxvk40u8p.rcgu.o /target/aarch64-unknown-linux-musl/debug/deps/hellopp-e18a46c88e8651c0.3jb6c2penqwbl1tw.rcgu.o /target/aarch64-unknown-linux-musl/debug/deps/hellopp-e18a46c88e8651c0.43s4nhow0bh4mdu7.rcgu.o /target/aarch64-unknown-linux-musl/debug/deps/hellopp-e18a46c88e8651c0.4jh1kcigexzy7mj.rcgu.o /target/aarch64-unknown-linux-musl/debug/deps/hellopp-e18a46c88e8651c0.86k6xqe3mcfnldm.rcgu.o /target/aarch64-unknown-linux-musl/debug/deps/hellopp-e18a46c88e8651c0.37wbsb42mhp6kphi.rcgu.o -Wl,--as-needed -L /target/aarch64-unknown-linux-musl/debug/deps -L /target/debug/deps -L /target/aarch64-unknown-linux-musl/debug/build/hellopp-be12ba6d38a66dd4/out -L /home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-musl/lib -Wl,-Bstatic -lhellopp -Wl,-Bdynamic -lstdc++ -Wl,--start-group -Wl,-Bstatic /target/aarch64-unknown-linux-musl/debug/deps/libstd-2b9a1a9c35b1230a.rlib /target/aarch64-unknown-linux-musl/debug/deps/libpanic_unwind-d70e14d6e59177bc.rlib /target/aarch64-unknown-linux-musl/debug/deps/librustc_demangle-f3d5b949b7b1a5de.rlib /target/aarch64-unknown-linux-musl/debug/deps/libstd_detect-59b5d3ce85adba29.rlib /target/aarch64-unknown-linux-musl/debug/deps/libhashbrown-2f24b7025c0e4078.rlib /target/aarch64-unknown-linux-musl/debug/deps/librustc_std_workspace_alloc-f93333caf4316797.rlib /target/aarch64-unknown-linux-musl/debug/deps/libunwind-755d10c7440dc2d0.rlib -lunwind /target/aarch64-unknown-linux-musl/debug/deps/libcfg_if-22929b06043a7aec.rlib /target/aarch64-unknown-linux-musl/debug/deps/liblibc-3e7ed81f524f85a0.rlib -lc /target/aarch64-unknown-linux-musl/debug/deps/liballoc-64350ab48d7b62c5.rlib /target/aarch64-unknown-linux-musl/debug/deps/librustc_std_workspace_core-ab8f7e806a10a573.rlib /target/aarch64-unknown-linux-musl/debug/deps/libcore-b2d649ba95a0a0a1.rlib -Wl,--end-group /target/aarch64-unknown-linux-musl/debug/deps/libcompiler_builtins-d8af7abe78822f7d.rlib -Wl,-Bdynamic -Wl,--eh-frame-hdr -Wl,-znoexecstack -nostartfiles -L /home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-musl/lib -L /home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-musl/lib/self-contained -o /target/aarch64-unknown-linux-musl/debug/deps/hellopp-e18a46c88e8651c0 -Wl,--gc-sections -static -no-pie -Wl,-zrelro,-znow -nodefaultlibs /home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-musl/lib/self-contained/crtend.o /home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-musl/lib/self-contained/crtn.o
          + local release=
          ++ rustc -Vv
          ++ grep '^release:'
          ++ cut -d : -f2
          + release=' 1.63.0-nightly'
          + local minor=
          ++ echo ' 1.63.0-nightly'
          ++ cut -d . -f2
          + minor=63
          + ((  minor >= 48  ))
          + aarch64-linux-musl-gcc /home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-musl/lib/self-contained/crt1.o /home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-musl/lib/self-contained/crti.o /home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-musl/lib/self-contained/crtbegin.o /tmp/rustcgsdU4c/symbols.o /target/aarch64-unknown-linux-musl/debug/deps/hellopp-e18a46c88e8651c0.17yj6cbrqsa7ydok.rcgu.o /target/aarch64-unknown-linux-musl/debug/deps/hellopp-e18a46c88e8651c0.31ozsu1nxvk40u8p.rcgu.o /target/aarch64-unknown-linux-musl/debug/deps/hellopp-e18a46c88e8651c0.3jb6c2penqwbl1tw.rcgu.o /target/aarch64-unknown-linux-musl/debug/deps/hellopp-e18a46c88e8651c0.43s4nhow0bh4mdu7.rcgu.o /target/aarch64-unknown-linux-musl/debug/deps/hellopp-e18a46c88e8651c0.4jh1kcigexzy7mj.rcgu.o /target/aarch64-unknown-linux-musl/debug/deps/hellopp-e18a46c88e8651c0.86k6xqe3mcfnldm.rcgu.o /target/aarch64-unknown-linux-musl/debug/deps/hellopp-e18a46c88e8651c0.37wbsb42mhp6kphi.rcgu.o -Wl,--as-needed -L /target/aarch64-unknown-linux-musl/debug/deps -L /target/debug/deps -L /target/aarch64-unknown-linux-musl/debug/build/hellopp-be12ba6d38a66dd4/out -L /home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-musl/lib -Wl,-Bstatic -lhellopp -Wl,-Bdynamic -lstdc++ -Wl,--start-group -Wl,-Bstatic /target/aarch64-unknown-linux-musl/debug/deps/libstd-2b9a1a9c35b1230a.rlib /target/aarch64-unknown-linux-musl/debug/deps/libpanic_unwind-d70e14d6e59177bc.rlib /target/aarch64-unknown-linux-musl/debug/deps/librustc_demangle-f3d5b949b7b1a5de.rlib /target/aarch64-unknown-linux-musl/debug/deps/libstd_detect-59b5d3ce85adba29.rlib /target/aarch64-unknown-linux-musl/debug/deps/libhashbrown-2f24b7025c0e4078.rlib /target/aarch64-unknown-linux-musl/debug/deps/librustc_std_workspace_alloc-f93333caf4316797.rlib /target/aarch64-unknown-linux-musl/debug/deps/libunwind-755d10c7440dc2d0.rlib -lunwind /target/aarch64-unknown-linux-musl/debug/deps/libcfg_if-22929b06043a7aec.rlib /target/aarch64-unknown-linux-musl/debug/deps/liblibc-3e7ed81f524f85a0.rlib -lc /target/aarch64-unknown-linux-musl/debug/deps/liballoc-64350ab48d7b62c5.rlib /target/aarch64-unknown-linux-musl/debug/deps/librustc_std_workspace_core-ab8f7e806a10a573.rlib /target/aarch64-unknown-linux-musl/debug/deps/libcore-b2d649ba95a0a0a1.rlib -Wl,--end-group /target/aarch64-unknown-linux-musl/debug/deps/libcompiler_builtins-d8af7abe78822f7d.rlib -Wl,-Bdynamic -Wl,--eh-frame-hdr -Wl,-znoexecstack -nostartfiles -L /home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-musl/lib -L /home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-musl/lib/self-contained -o /target/aarch64-unknown-linux-musl/debug/deps/hellopp-e18a46c88e8651c0 -Wl,--gc-sections -static -no-pie -Wl,-zrelro,-znow -nodefaultlibs /home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-musl/lib/self-contained/crtend.o /home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-musl/lib/self-contained/crtn.o
          /usr/local/bin/../lib/gcc/aarch64-linux-musl/9.2.0/../../../../aarch64-linux-musl/bin/ld: /home/ahusz/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/aarch64-unknown-linux-musl/lib/self-contained/libc.a(fmodl.lo): undefined reference to symbol '__letf2@@GCC_3.0'
          /usr/local/bin/../lib/gcc/aarch64-linux-musl/9.2.0/../../../../aarch64-linux-musl/bin/ld: /usr/local/bin/../aarch64-linux-musl/lib/libgcc_s.so.1: error adding symbols: DSO missing from command line
          collect2: error: ld returned 1 exit status

  = help: some `extern` functions couldn't be found; some native libraries may need to be installed or have their path specified
  = note: use the `-l` flag to specify native libraries to link
  = note: use the `cargo:rustc-link-lib` directive to specify the native libraries to link with Cargo (see https://doc.rust-lang.org/cargo/reference/build-scripts.html#cargorustc-link-libkindname)

error: could not compile `hellopp` due to previous error

Or, missing the __letf2 routine.

[Alexhuszagh]

This seems to be related to, but not exactly the same as, rust-lang/rust#46651, which was a previous issue for our aarch64-unknown-linux-musl. We've had to link to -lgcc due to missing symbols from Rust before for multiple targets before, so this is likely an upstream issue (but with a simple fix):

• mips64-linux-muslabi64-gcc.sh
• aarch64-linux-musl-gcc.sh

This is probably a generic musl issue, and upstream in Rust itself. A simple temporary fix though is to always link to libgcc. I'll file issues upstream.

[Alexhuszagh]

The patch in #986 seems to fix this issue: if you want to test the above patch to see if it works, let me know. I've tried using your fork of cargo-bininstalland everything works on my end (and the resulting binary is statically linked, as expected).

[Alexhuszagh]

Missing __ctzdi2 is very unusual, since it should be provided always by the Rust compiler builtins for all targets (and was present in v0.1.73 (which is what I was using). It might have been missing from an older target.

https://github.com/rust-lang/compiler-builtins/blob/5e2d31689d6446c5c767f6a75c24aed81786e949/build.rs#L202

Some of the other missing intrinsics seem to be due to consider_float_intrinsics not being set (which would only occur if either the +nofp or +nosimd target feature was set).

https://github.com/NobodyXu/cargo-binstall/runs/7576062950?check_suite_focus=true#step:11:250

We can clearly see from the source that these symbols should be defined:

https://github.com/rust-lang/compiler-builtins/blob/5e2d31689d6446c5c767f6a75c24aed81786e949/build.rs#L414-L443

[NobodyXu]

The patch in #986 seems to fix this issue: if you want to test the above patch to see if it works, let me know

Thanks, I will have a try later.

Some of the other missing intrinsics seem to be due to consider_float_intrinsics not being set (which would only occur if either the +nofp or +nosimd target feature was set)

I only disable the panic unwind/backtract/fmt-message stuff, so I am pretty sure I didn't disable that.

[Alexhuszagh]

Actually, this might be an issue due to not having the c feature enabled and the image not having the LLVM builtin sources. In short, it's actually impossible to build aarch64-unknown-linux-musl std until those intrinsics are implemented natively in Rust itself. The only good solution is to link to -lgcc itself (see #986).

[Alexhuszagh]

This has now been fully documented on the wiki. Let me know if anything is unclear so we can improve the documentation.

[NobodyXu]

This has now been fully documented on the wiki. Let me know if anything is unclear so we can improve the documentation.

Thanks, this fixed the problem for me!