Without musl-root in config.toml the build stop with the following error:
thread 'main' panicked at 'couldn't find libc.a in musl libdir: output/host/arm-buildroot-linux-musleabihf/sysroot/lib/lib', src/bootstrap/sanity.rs:192:25
musl-root is needed to provide the path to libc.a and libunwind.a because
rust link them statically into the standard library and liblibc [1].
For other libc, musl-root is not used and ignored [2].
[1] cd980b3bee
[2] https://github.com/rust-lang/rust/blob/1.58.1/src/bootstrap/sanity.rs#L181
Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
a41b0f31de