Add erasure rust logic under feature flag

Cargo.toml

@@ -8,6 +8,7 @@ repository = "https://github.com/solana-labs/solana"
 authors = [
     "Anatoly Yakovenko <[email protected]>",
     "Greg Fitzgerald <[email protected]>",
+    "Stephen Akridge <[email protected]>",
 ]
 license = "Apache-2.0"
 
@@ -42,6 +43,7 @@ codecov = { repository = "solana-labs/solana", branch = "master", service = "git
 unstable = []
 ipv6 = []
 cuda = []
+erasure = []
 
 [dependencies]
 rayon = "1.0.0"

build.rs

@@ -1,12 +1,15 @@
 use std::env;
 
 fn main() {
+    println!("cargo:rustc-link-search=native=.");
     if !env::var("CARGO_FEATURE_CUDA").is_err() {
-        println!("cargo:rustc-link-search=native=.");
         println!("cargo:rustc-link-lib=static=cuda_verify_ed25519");
         println!("cargo:rustc-link-search=native=/usr/local/cuda/lib64");
         println!("cargo:rustc-link-lib=dylib=cudart");
         println!("cargo:rustc-link-lib=dylib=cuda");
         println!("cargo:rustc-link-lib=dylib=cudadevrt");
     }
+    if !env::var("CARGO_FEATURE_ERASURE").is_err() {
+        println!("cargo:rustc-link-lib=dylib=Jerasure");
+    }
 }