Fix c feature

Cargo.toml

@@ -42,7 +42,7 @@ default = ["compiler-builtins"]
 
 # Enable compilation of C code in compiler-rt, filling in some more optimized
 # implementations and also filling in unimplemented intrinsics
-# c = ["cc"]
+c = []
 
 # Flag this library as the unstable compiler-builtins lib
 compiler-builtins = []

build.rs

@@ -91,7 +91,7 @@ fn compile_memcpy() {
         "memcpy.S",
     ];
 
-    let root = Path::new("./asm");
+    let root = Path::new("asm");
     for src in sources {
         println!("cargo:rerun-if-changed={}", src);
         cfg.file(root.join(src));