Can't run x86_64-unknown-linux-musltoolchain on Centos7

[bigdogs]

hi, I'm trying to build musl target on centos 7. but seems the cargo on musl toolchain is invalid.. which says libgcc_s.so.1 is invalid, I hava no idea why this error happending.

[root@localhost bin]# pwd
/root/.rustup/toolchains/nightly-2023-06-20-x86_64-unknown-linux-musl/bin


[root@localhost bin]# ./cargo
Error loading shared library libgcc_s.so.1: Exec format error (needed by ./cargo)
Error relocating ./cargo: _Unwind_Resume: symbol not found
Error relocating ./cargo: _Unwind_GetIPInfo: symbol not found
Error relocating ./cargo: _Unwind_GetDataRelBase: symbol not found
Error relocating ./cargo: _Unwind_GetRegionStart: symbol not found
Error relocating ./cargo: _Unwind_SetGR: symbol not found
Error relocating ./cargo: _Unwind_FindEnclosingFunction: symbol not found
Error relocating ./cargo: _Unwind_GetTextRelBase: symbol not found
Error relocating ./cargo: _Unwind_DeleteException: symbol not found
Error relocating ./cargo: _Unwind_RaiseException: symbol not found
Error relocating ./cargo: _Unwind_GetIP: symbol not found
Error relocating ./cargo: _Unwind_Backtrace: symbol not found
Error relocating ./cargo: _Unwind_GetCFA: symbol not found
Error relocating ./cargo: _Unwind_GetLanguageSpecificData: symbol not found
Error relocating ./cargo: _Unwind_SetIP: symbol not found
[root@localhost bin]# file /usr/lib64/libgcc_s.so.1
/usr/lib64/libgcc_s.so.1: symbolic link to `libgcc_s-4.8.5-20150702.so.1'
[root@localhost bin]# file /usr/lib64/libgcc_s-4.8.5-20150702.so.1
/usr/lib64/libgcc_s-4.8.5-20150702.so.1: ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, BuildID[sha1]=edf51350c7f71496149d064aa8b1441f786df88a, stripped

[hax10]

Your dynamic linker doesn't know where to find libgcc_s.so.1. You can explicitly tell it where to look by setting the LD_LIBRARY_PATH variable, like so:

LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/lib64/ ./cargo

If your libgcc_s shared object wasn't built with musl, you'll probably get a new set of errors. You can download an appropriate shared object from here:

musl libc toolchains | static cross/native toolchains

The x86_64-linux-musl-native.tgz tarball should have what you need.

If that works, you can set the LD_LIBRARY_PATH permanently in whatever way is convenient for you.

[bjorn3]

You can't run a program compiled for dynamically linked musl on a distro based on glibc like CentOS without installing musl on this system too. If you want to build for musl on a glibc based distro you should install rustc compiled for glibc and then use this rustc to compile for musl instead.