Static musl hello-world segfaults on nixos

[g-w1]

I tried this code:

cargo new bug
cd bug
cargo build --target x86_64-unknown-linux-musl
./target/x86_64-unknown-linux-musl/debug/bug
> Segmentation fault (core dumped)

I expected to have it say hello world.

Instead, this happened:

(gdb) r
Starting program: /tmp/bug/target/x86_64-unknown-linux-musl/debug/bug

Program received signal SIGSEGV, Segmentation fault.
0x000055555555916b in _start_c ()
(gdb) bt
#0  0x000055555555916b in _start_c ()
#1  0x00007fffffffbb89 in ?? ()
#2  0x00000000bfebfbff in ?? ()
#3  0x0000000000000064 in ?? ()
#4  0x0000000000000000 in ?? ()
(gdb)

Meta

rustc --version --verbose:

rustc 1.49.0 (e1884a8e3 2020-12-29)
binary: rustc
commit-hash: e1884a8e3c3e813aada8254edfa120e85bf5ffca
commit-date: 2020-12-29
host: x86_64-unknown-linux-gnu
release: 1.49.0

I am on nixos 20.09.2812.f18fbc33930 (Nightingale)
uname -a: Linux dell 5.4.93 #1-NixOS SMP Wed Jan 27 10:47:55 UTC 2021 x86_64 GNU/Linux

[JustAnotherStrange]

Cannot reproduce on EndeavourOS (Arch based) - creates a statically linked binary just fine. Must be an issue related to NixOS.

$ rustc --version --verbose
rustc 1.52.0-nightly (07194ffcd 2021-02-10)
binary: rustc
commit-hash: 07194ffcd25b0871ce560b9f702e52db27ac9f77
commit-date: 2021-02-10
host: x86_64-unknown-linux-gnu
release: 1.52.0-nightly
LLVM version: 11.0.1

$ uname -a 
Linux dell 5.10.15-arch1-1 #1 SMP PREEMPT Wed, 10 Feb 2021 18:32:40 +0000 x86_64 GNU/Linux

[cole-h]

Also can't reproduce, but on NixOS.

$ rustc --version --verbose
rustc 1.50.0 (cb75ad5db 2021-02-10)
binary: rustc
commit-hash: cb75ad5db02783e8b0222fee363c5f63f7e2cf5b
commit-date: 2021-02-10
host: x86_64-unknown-linux-gnu
release: 1.50.0

$ uname -a
Linux scadrial 5.11.1-zen1 #1-NixOS ZEN SMP Tue Jan 1 00:00:00 UTC 1980 x86_64 GNU/Linux

Running from NixOS/nixpkgs@cb5f00d -- possibly fixed "recently" (e.g. after the release of 20.09) but not backported?

(Note: I used rustup and added the musl target, since I don't know how to add the musl target in a NixOS-native way... :)

[g-w1]

After some googling, seems like #74757 (probably a dupe) I have to disable PIE and then it works RUSTFLAGS='-C relocation-model=static' cargo build --target=x86_64-unknown-linux-musl. Seems like it warrants a nixos bug as well as maybe a musl one. Here is the nixos one. NixOS/nixpkgs#94228 I think it is due to compiling static musl binaries with gcc on nixos. @cole-h when it said can't find linker cc, did you do nix-shell -p gcc or did you already have cc? I think this is due to how rustc links the final binary with musl. (Not sure though.)

[cole-h]

Ah, I have gcc in my environment.systemPackages. That may be why.

[g-w1]

Closing since it is a upstream bug.