I tried to use compiled rustc to compile webassembly but failed. I add custom build rustc to toolchain and tried to add
wasm32-unknown-unknown target but get error message below:
rustup target add --toolchain stage2 wasm32-unknown-unknown error: toolchain 'stage2' does not support components error: caused by: invalid toolchain name: 'stage2'
It seems that custom toolchain don't support components adding. And I can't find any related issue and document, even rustc-guide doesn't mention it. Could someone give me a hint?