Add rustc's sysroot/lib to LD_LIBRARY_PATH

The default way to use rust is rustup. Rustup maintains its own sysroot.
This is fine for most rust applications, as they don't dynamically link
to anything in that sysroot. rustfmt does, however, and thus must be
called with the correct LD_LIBRARY_PATH.

Author: Naseschwarz

bootstrap.sh

@@ -6,6 +6,8 @@
 
 cargo build --release
 
+export LD_LIBRARY_PATH="$(rustc --print sysroot)/lib:${LD_LIBRARY_PATH}"
+
 target/release/rustfmt src/lib.rs
 target/release/rustfmt src/bin/main.rs
 target/release/rustfmt src/cargo-fmt/main.rs