Allow static linking

Cargo.lock

@@ -10,19 +10,34 @@ checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
 [[package]]
 name = "cat-box"
-version = "0.1.5"
+version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6f1c7d6dd0dea2e5869d7d63428606d9d789216b9e1230c6f6057aa1b4d68886"
+checksum = "24bda0d6fb9dc5a286c9afe6286b1de1f3fe7175310b4b0c2c34174fccafbd19"
 dependencies = [
  "sdl2",
 ]
 
+[[package]]
+name = "cc"
+version = "1.0.73"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2fff2a6927b3bb87f9595d67196a70493f627687a71d87a0d692242c33f58c11"
+
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
+[[package]]
+name = "cmake"
+version = "0.1.48"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e8ad8cef104ac57b68b89df3208164d228503abbdce70f6880ffa3d970e7443a"
+dependencies = [
+ "cc",
+]
+
 [[package]]
 name = "getrandom"
 version = "0.2.6"
@@ -101,6 +116,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e3586be2cf6c0a8099a79a12b4084357aa9b3e0b0d7980e3b67aaf7a9d55f9f0"
 dependencies = [
  "cfg-if",
+ "cmake",
  "libc",
  "version-compare",
 ]

Cargo.toml

@@ -6,6 +6,10 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-cat-box = "0.1.5"
+cat-box = "0.1.6"
 rand = "0.8.5"
 sdl2 = "0.35.2"
+
+[features]
+default = []
+static = ["cat-box/static"]