Linker error for LLVM-10-rust-1.45.0-nightly when building compiler plugins

[jdm]

Servo has a crate of compiler plugins (https://github.com/servo/servo/tree/master/components/script_plugins) which now fails to build on linux starting with the 5/22 nightly.

error: linking with `cc` failed: exit code: 1
  |
  = note: "cc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-m64" "-L" "/root/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "/repo/target/debug/deps/script_plugins.script_plugins.blvvqtbe-cgu.0.rcgu.o" "/repo/target/debug/deps/script_plugins.script_plugins.blvvqtbe-cgu.1.rcgu.o" "/repo/target/debug/deps/script_plugins.script_plugins.blvvqtbe-cgu.10.rcgu.o" "/repo/target/debug/deps/script_plugins.script_plugins.blvvqtbe-cgu.11.rcgu.o" "/repo/target/debug/deps/script_plugins.script_plugins.blvvqtbe-cgu.12.rcgu.o" "/repo/target/debug/deps/script_plugins.script_plugins.blvvqtbe-cgu.13.rcgu.o" "/repo/target/debug/deps/script_plugins.script_plugins.blvvqtbe-cgu.14.rcgu.o" "/repo/target/debug/deps/script_plugins.script_plugins.blvvqtbe-cgu.15.rcgu.o" "/repo/target/debug/deps/script_plugins.script_plugins.blvvqtbe-cgu.2.rcgu.o" "/repo/target/debug/deps/script_plugins.script_plugins.blvvqtbe-cgu.3.rcgu.o" "/repo/target/debug/deps/script_plugins.script_plugins.blvvqtbe-cgu.4.rcgu.o" "/repo/target/debug/deps/script_plugins.script_plugins.blvvqtbe-cgu.5.rcgu.o" "/repo/target/debug/deps/script_plugins.script_plugins.blvvqtbe-cgu.6.rcgu.o" "/repo/target/debug/deps/script_plugins.script_plugins.blvvqtbe-cgu.7.rcgu.o" "/repo/target/debug/deps/script_plugins.script_plugins.blvvqtbe-cgu.8.rcgu.o" "/repo/target/debug/deps/script_plugins.script_plugins.blvvqtbe-cgu.9.rcgu.o" "-o" "/repo/target/debug/deps/libscript_plugins.so" "-Wl,--version-script=/tmp/rustctxfHYp/list" "/repo/target/debug/deps/script_plugins.a9q7pget1xzpz9k.rcgu.o" "-Wl,-zrelro" "-Wl,-znow" "-nodefaultlibs" "-L" "/repo/target/debug/deps" "-L" "/root/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-L" "/root/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-lrustc_driver-36ab768154a08cc2" "-Wl,--start-group" "-L" "/root/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-lstd-265ff16c7b6b86f9" "-Wl,--end-group" "-Wl,-Bstatic" "/tmp/rustctxfHYp/libcompiler_builtins-a1755b3e88842f5d.rlib" "-Wl,-Bdynamic" "-lLLVM-10-rust-1.45.0-nightly" "-lutil" "-ldl" "-lutil" "-ldl" "-lrt" "-lpthread" "-lgcc_s" "-lc" "-lm" "-lrt" "-lpthread" "-lutil" "-ldl" "-lutil" "-shared" "-fuse-ld=gold"
  = note: /usr/bin/ld.gold: error: cannot find -lLLVM-10-rust-1.45.0-nightly
          collect2: error: ld returned 1 exit status
          
error: aborting due to previous error
error: could not compile `script_plugins`.

[JohnTitor]

I think you should add llvm-tools(-preview) component.

[Mark-Simulacrum]

Yes, this is expected fallout from a recent change. Please let me know if it's causing serious problems though, it's plausible we can find an alternative way of achieving the goals of the PR that broke this.
The rustc-dev component which you need for this isn't shipped on stable so this isn't a stable-to-nightly regression.

[jdm]

Thanks!