Link error on aarch64

[SparrowLii]

My Cargo.toml:

[package]
name = "untitled1"
version = "0.1.0"
edition = "2021"

[profile.release]
lto = true
codegen-units = 1
panic = "abort"

My main.rs:

fn main() {
    println!("Hello, world!");
}

My Xargo.toml:

[dependencies.std]
stage = 2

And when I run xargo build --release --target=aarch64-unknown-linux-gnu, it fault with:

   Compiling untitled1 v0.1.0 (/home/liyuan/untitled1)
error: linking with `cc` failed: exit status: 1
  |
  = note: "cc" "/home/liyuan/untitled1/target/aarch64-unknown-linux-gnu/release/deps/untitled1-65dedcf1a56c19ff.untitled1.cd53ad71-cgu.0.rcgu.o" "-Wl,--as-needed" "-L" "/home/liyuan/untitled1/target/aarch64-unknown-linux-gnu/release/deps" "-L" "/home/liyuan/untitled1/target/release/deps" "-L" "/root/.xargo/HOST/lib/rustlib/aarch64-unknown-linux-gnu/lib" "-Wl,--start-group" "-Wl,--end-group" "-Wl,-Bstatic" "/root/.xargo/HOST/lib/rustlib/aarch64-unknown-linux-gnu/lib/libcompiler_builtins-0549068cc816ada1.rlib" "-Wl,-Bdynamic" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-Wl,--eh-frame-hdr" "-Wl,-znoexecstack" "-L" "/root/.xargo/HOST/lib/rustlib/aarch64-unknown-linux-gnu/lib" "-o" "/home/liyuan/untitled1/target/aarch64-unknown-linux-gnu/release/deps/untitled1-65dedcf1a56c19ff" "-Wl,--gc-sections" "-pie" "-Wl,-zrelro" "-Wl,-znow" "-Wl,-O1" "-nodefaultlibs"
  = note: /home/liyuan/untitled1/target/aarch64-unknown-linux-gnu/release/deps/untitled1-65dedcf1a56c19ff.untitled1.cd53ad71-cgu.0.rcgu.o: In function `main':
          untitled1.cd53ad71-cgu.0:(.text.main+0x574): undefined reference to `__aarch64_ldadd8_rel'
          /home/liyuan/untitled1/target/aarch64-unknown-linux-gnu/release/deps/untitled1-65dedcf1a56c19ff.untitled1.cd53ad71-cgu.0.rcgu.o: In function `std::thread::current':
          untitled1.cd53ad71-cgu.0:(.text._ZN3std6thread7current17h8875f1997c00dfceE+0x94): undefined reference to `__aarch64_ldadd8_relax'
          /home/liyuan/untitled1/target/aarch64-unknown-linux-gnu/release/deps/untitled1-65dedcf1a56c19ff.untitled1.cd53ad71-cgu.0.rcgu.o: In function `std::sys_common::thread_info::THREAD_INFO::__getit::destroy':
          untitled1.cd53ad71-cgu.0:(.text._ZN3std10sys_common11thread_info11THREAD_INFO7__getit7destroy17h75e88f60ab7c870eE+0x30): undefined reference to `__aarch64_ldadd8_rel'
          /home/liyuan/untitled1/target/aarch64-unknown-linux-gnu/release/deps/untitled1-65dedcf1a56c19ff.untitled1.cd53ad71-cgu.0.rcgu.o: In function `std::panicking::rust_panic_with_hook':
          untitled1.cd53ad71-cgu.0:(.text._ZN3std9panicking20rust_panic_with_hook17hcbdc16408d196971E+0x34): undefined reference to `__aarch64_ldadd8_relax'
          untitled1.cd53ad71-cgu.0:(.text._ZN3std9panicking20rust_panic_with_hook17hcbdc16408d196971E+0x218): undefined reference to `__aarch64_ldadd8_relax'
          untitled1.cd53ad71-cgu.0:(.text._ZN3std9panicking20rust_panic_with_hook17hcbdc16408d196971E+0x5f0): undefined reference to `__aarch64_ldadd8_relax'
          untitled1.cd53ad71-cgu.0:(.text._ZN3std9panicking20rust_panic_with_hook17hcbdc16408d196971E+0x6d8): undefined reference to `__aarch64_ldadd8_rel'
          untitled1.cd53ad71-cgu.0:(.text._ZN3std9panicking20rust_panic_with_hook17hcbdc16408d196971E+0x6f8): undefined reference to `__aarch64_ldadd8_relax'
          /home/liyuan/untitled1/target/aarch64-unknown-linux-gnu/release/deps/untitled1-65dedcf1a56c19ff.untitled1.cd53ad71-cgu.0.rcgu.o: In function `alloc::sync::Arc<T>::drop_slow':
          untitled1.cd53ad71-cgu.0:(.text._ZN5alloc4sync12Arc$LT$T$GT$9drop_slow17hed7f2db05f2ab185E+0x34): undefined reference to `__aarch64_ldadd8_rel'
          /home/liyuan/untitled1/target/aarch64-unknown-linux-gnu/release/deps/untitled1-65dedcf1a56c19ff.untitled1.cd53ad71-cgu.0.rcgu.o: In function `std::sys_common::thread_local_key::StaticKey::lazy_init':
          untitled1.cd53ad71-cgu.0:(.text._ZN3std10sys_common16thread_local_key9StaticKey9lazy_init17h7c8dd114f0263e40E+0x68): undefined reference to `__aarch64_cas8_acq_rel'
          /home/liyuan/untitled1/target/aarch64-unknown-linux-gnu/release/deps/untitled1-65dedcf1a56c19ff.untitled1.cd53ad71-cgu.0.rcgu.o: In function `std::sync::once::Once::call_inner':
          untitled1.cd53ad71-cgu.0:(.text.unlikely._ZN3std4sync4once4Once10call_inner17h216c077ed7c4dd2dE+0x80): undefined reference to `__aarch64_cas8_acq'
          untitled1.cd53ad71-cgu.0:(.text.unlikely._ZN3std4sync4once4Once10call_inner17h216c077ed7c4dd2dE+0x1f8): undefined reference to `__aarch64_ldadd8_relax'
          untitled1.cd53ad71-cgu.0:(.text.unlikely._ZN3std4sync4once4Once10call_inner17h216c077ed7c4dd2dE+0x230): undefined reference to `__aarch64_cas8_rel'
          untitled1.cd53ad71-cgu.0:(.text.unlikely._ZN3std4sync4once4Once10call_inner17h216c077ed7c4dd2dE+0x24c): undefined reference to `__aarch64_ldadd8_rel'
          untitled1.cd53ad71-cgu.0:(.text.unlikely._ZN3std4sync4once4Once10call_inner17h216c077ed7c4dd2dE+0x374): undefined reference to `__aarch64_ldadd8_relax'
          untitled1.cd53ad71-cgu.0:(.text.unlikely._ZN3std4sync4once4Once10call_inner17h216c077ed7c4dd2dE+0x3a0): undefined reference to `__aarch64_ldadd4_acq'
          untitled1.cd53ad71-cgu.0:(.text.unlikely._ZN3std4sync4once4Once10call_inner17h216c077ed7c4dd2dE+0x3d0): undefined reference to `__aarch64_cas4_acq'
          untitled1.cd53ad71-cgu.0:(.text.unlikely._ZN3std4sync4once4Once10call_inner17h216c077ed7c4dd2dE+0x3e4): undefined reference to `__aarch64_ldadd8_rel'
          untitled1.cd53ad71-cgu.0:(.text.unlikely._ZN3std4sync4once4Once10call_inner17h216c077ed7c4dd2dE+0x418): undefined reference to `__aarch64_ldadd8_rel'
          untitled1.cd53ad71-cgu.0:(.text.unlikely._ZN3std4sync4once4Once10call_inner17h216c077ed7c4dd2dE+0x46c): undefined reference to `__aarch64_swp8_acq_rel'
          untitled1.cd53ad71-cgu.0:(.text.unlikely._ZN3std4sync4once4Once10call_inner17h216c077ed7c4dd2dE+0x4b8): undefined reference to `__aarch64_swp4_rel'
          untitled1.cd53ad71-cgu.0:(.text.unlikely._ZN3std4sync4once4Once10call_inner17h216c077ed7c4dd2dE+0x4cc): undefined reference to `__aarch64_ldadd8_rel'
          untitled1.cd53ad71-cgu.0:(.text.unlikely._ZN3std4sync4once4Once10call_inner17h216c077ed7c4dd2dE+0x4f8): undefined reference to `__aarch64_ldadd8_rel'
          /home/liyuan/untitled1/target/aarch64-unknown-linux-gnu/release/deps/untitled1-65dedcf1a56c19ff.untitled1.cd53ad71-cgu.0.rcgu.o: In function `core::ptr::drop_in_place<std::thread::Thread>':
          untitled1.cd53ad71-cgu.0:(.text._ZN4core3ptr40drop_in_place$LT$std..thread..Thread$GT$17h0c50201822c51a71E+0x10): undefined reference to `__aarch64_ldadd8_rel'
          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 `untitled1` due to previous error

I wonder if it is because xargo has a problem on aarch64

[SparrowLii]

This problem can currently be solved by adding the compilation parameter -Ctarget-feature=-outline-atomics, so I think this issue can be closed.