Fix deprecated use of cc::Build::compile in build.rs (#59)

Signed-off-by: Jiahao XU <Jiahao_XU@outlook.com>

md5/build.rs

@@ -8,8 +8,5 @@ fn main() {
     } else {
         panic!("Unsupported target architecture");
     };
-    cc::Build::new()
-        .flag("-c")
-        .file(asm_path)
-        .compile("libmd5.a");
+    cc::Build::new().flag("-c").file(asm_path).compile("md5");
 }

sha1/build.rs

@@ -17,5 +17,5 @@ fn main() {
     if target_arch == "aarch64" {
         build.flag("-march=armv8-a+crypto");
     }
-    build.flag("-c").file(asm_path).compile("libsha1.a");
+    build.flag("-c").file(asm_path).compile("sha1");
 }

sha2/build.rs

@@ -1,6 +1,6 @@
-fn main() {
-    use std::env;
+use std::env;
 
+fn main() {
     let target_arch = env::var("CARGO_CFG_TARGET_ARCH").unwrap_or_default();
     let target_vendor = env::var("CARGO_CFG_TARGET_VENDOR").unwrap_or_default();
 
@@ -25,5 +25,5 @@ fn main() {
             .file(sha512_path)
             .compile("libsha512.a");
     }
-    build256.flag("-c").file(sha256_path).compile("libsha256.a");
+    build256.flag("-c").file(sha256_path).compile("sha256");
 }

whirlpool/build.rs

@@ -11,5 +11,5 @@ fn main() {
     cc::Build::new()
         .flag("-c")
         .file(asm_path)
-        .compile("libwhirlpool.a");
+        .compile("whirlpool");
 }