Build script does not rebuild when the LLVM prefix has been corrected from an invalid path to a valid one

[WolverinDEV]

Hey ho,
the build script does not rebuild when the LLVM prefix has been corrected from an invalid path to a valid one.
This is because cargo:rerun-if-env-changed will only be emitted when the LLVM_CONFIG_PATH is set.

If LLVM_CONFIG_PATHis not set, the build script returns early.

llvm-plugin-rs/llvm-plugin/build.rs

Line 9 in efdb66c

return;

llvm-plugin-rs/llvm-plugin/build.rs

Line 57 in efdb66c

println!("cargo:rerun-if-env-changed={}", &*llvm_sys::ENV_LLVM_PREFIX);