Specify libc 0.2 or higher as a dependency

cargo test passes

CHANGELOG.md

@@ -3,6 +3,10 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [0.3.3] - 2016-03-17
+### Changed
+- Allow libc version 0.2 or higher
+
 ## [0.3.2] - 2016-02-10
 ### Changed
 - Automatically generate `bindings.rs` using `rust-bindgen` via `build.rs` script.

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "magick_rust"
-version = "0.3.2"
+version = "0.3.3"
 authors = ["Nathan Fiedler <nathanfiedler@fastmail.fm>"]
 description = "Selection of Rust bindings for the ImageMagick library."
 homepage = "https://github.com/nlfiedler/magick-rust"
@@ -11,4 +11,4 @@ keywords = ["magickwand", "imagemagick"]
 build = "build.rs"
 
 [dependencies]
-libc = "0.2.7"
+libc = ">=0.2"