Add some scaffolding for building more crates.

The src/tools directory contains the cretonne-tools crate which will build
binaries for testing cretonne.

The src/libctonfile directory contains the ctonfile library crate which
provides reading and writing of .cton files.

src/.gitignore

@@ -1,2 +1,2 @@
 target
-Cargo.lock
+lib*/Cargo.lock

src/libcretonne/Cargo.toml

@@ -2,6 +2,10 @@
 authors = ["The Cretonne Project Developers"]
 name = "cretonne"
 version = "0.0.0"
+description = "Low-level code generator library"
+documentation = "https://cretonne.readthedocs.org/"
+repository = "https://github.com/stoklund/cretonne"
+publish = false
 build = "build.rs"
 
 [lib]

src/libctonfile/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+authors = ["The Cretonne Project Developers"]
+name = "ctonfile"
+version = "0.0.0"
+publish = false
+
+[lib]
+name = "ctonfile"
+path = "lib.rs"
+
+[dependencies]
+cretonne = { path = "../libcretonne" }

src/libctonfile/lib.rs

@@ -0,0 +1,12 @@
+
+// ====------------------------------------------------------------------------------------==== //
+//
+// Cretonne file read/write library
+//
+// ====------------------------------------------------------------------------------------==== //
+//
+// The libctonfile library supports reading and writing .cton files. This functionality is needed
+// for testing Cretonne, but is not essential for a JIT compiler.
+
+extern crate cretonne;
+pub mod parser;

src/libctonfile/parser.rs

@@ -0,0 +1,2 @@
+
+use cretonne;

src/tools/Cargo.lock

@@ -0,0 +1,19 @@
+[root]
+name = "cretonne-tools"
+version = "0.0.0"
+dependencies = [
+ "cretonne 0.0.0",
+ "ctonfile 0.0.0",
+]
+
+[[package]]
+name = "cretonne"
+version = "0.0.0"
+
+[[package]]
+name = "ctonfile"
+version = "0.0.0"
+dependencies = [
+ "cretonne 0.0.0",
+]
+

src/tools/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+authors = ["The Cretonne Project Developers"]
+name = "cretonne-tools"
+version = "0.0.0"
+description = "Binaries for testing the Cretonne library"
+publish = false
+
+[[bin]]
+name = "cretonne"
+path = "main.rs"
+
+[dependencies]
+cretonne = { path = "../libcretonne" }
+ctonfile = { path = "../libctonfile" }

src/tools/main.rs

@@ -0,0 +1,5 @@
+
+extern crate cretonne;
+extern crate ctonfile;
+
+fn main() {}