diff --git a/Cargo.toml b/Cargo.toml
index ca6c267..60bb4ac 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,7 +3,13 @@ name = "phash"
 version = "0.1.0"
 edition = "2021"
 
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+#See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[lib]
+crate-type = ["rlib", "staticlib", "cdylib"]
+
+[[bin]]
+name="phash-sum"
 
 [dependencies]
 #atomic_refcell = "0.1.8"
diff --git a/src/bin/phash-sum.rs b/src/bin/phash-sum.rs
new file mode 100644
index 0000000..c7f613d
--- /dev/null
+++ b/src/bin/phash-sum.rs
@@ -0,0 +1,7 @@
+extern crate phash;
+use phash::*;
+
+fn main()
+{
+    //TODO: mmap first argument if it exists; or attempt to mmap stdin; or stream read from stdin into a ParallelDigest etc
+}