Make bindings no_std compatible

examples/demo/Cargo.toml

@@ -3,10 +3,12 @@ name = "demo"
 version = "0.1.0"
 authors = ["Rafael Caricio <crates@caric.io>"]
 edition = "2018"
+publish = false
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
 lvgl-sys = { path = "../../lvgl-sys" }
+lvgl = { path = "../../lvgl" }
 sdl2 = "0.33.0"
 lazy_static = "1.4.0"

lvgl-sys/Cargo.toml

@@ -12,6 +12,7 @@ links = "lvgl"
 name = "lvgl_sys"
 
 [dependencies]
+cty = "0.2.1"
 
 [build-dependencies]
 cc = "1.0.50"

lvgl-sys/build.rs

@@ -37,6 +37,10 @@ fn main() {
     ];
     bindgen::Builder::default()
         .header(src.parent().unwrap().join("lvgl.h").to_str().unwrap())
+        .layout_tests(false)
+        .use_core()
+        .ctypes_prefix("cty")
+        .raw_line("use cty;")
         .clang_args(&cc_args)
         .generate()
         .expect("Unable to generate bindings")

lvgl/Cargo.toml

@@ -3,8 +3,10 @@ name = "lvgl"
 version = "0.1.0"
 authors = ["Rafael Caricio <crates.lvgl@caric.io>"]
 edition = "2018"
+repository = "https://github.com/rafaelcaricio/lvgl-rs"
 license = "MIT"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+lvgl-sys = { path = "../lvgl-sys" }

lvgl/src/lib.rs

@@ -1,3 +1,5 @@
+#![no_std]
+
 #[cfg(test)]
 mod tests {
     #[test]