Fix Lua55 support

Author: khvzak

src/lib.rs

@@ -147,7 +147,7 @@ impl Build {
             }
             _ if target.contains("apple-ios") => {
                 match version {
-                    Lua54 => config.define("LUA_USE_IOS", None),
+                    Lua54 | Lua55 => config.define("LUA_USE_IOS", None),
                     _ => config.define("LUA_USE_POSIX", None),
                 };
             }
@@ -212,7 +212,10 @@ impl Build {
 
         if let Lua54 = version {
             config.define("LUA_COMPAT_5_3", None);
-            #[cfg(feature = "ucid")]
+        }
+
+        #[cfg(feature = "ucid")]
+        if let Lua54 | Lua55 = version {
             config.define("LUA_UCID", None);
         }
 

testcrate/src/lib.rs

@@ -1,10 +1,15 @@
-#![allow(unsafe_op_in_unsafe_fn, clippy::missing_safety_doc)]
+#![allow(unsafe_op_in_unsafe_fn, non_snake_case, clippy::missing_safety_doc)]
 
 use std::os::raw::{c_char, c_int, c_long, c_void};
 
 unsafe extern "C" {
     pub fn luaL_newstate() -> *mut c_void;
+
+    #[cfg(not(feature = "lua55"))]
     pub fn luaL_openlibs(state: *mut c_void);
+    #[cfg(feature = "lua55")]
+    pub fn luaL_openselectedlibs(state: *mut c_void, load: c_int, preload: c_int);
+
     pub fn lua_getfield(state: *mut c_void, index: c_int, k: *const c_char);
     pub fn lua_tolstring(state: *mut c_void, index: c_int, len: *mut c_long) -> *const c_char;
     pub fn luaL_loadstring(state: *mut c_void, s: *const c_char) -> c_int;
@@ -43,6 +48,11 @@ unsafe extern "C" {
     pub fn lua_getglobal(state: *mut c_void, k: *const c_char) -> c_int;
 }
 
+#[cfg(feature = "lua55")]
+pub unsafe fn luaL_openlibs(state: *mut c_void) {
+    luaL_openselectedlibs(state, !0, 0);
+}
+
 #[cfg(feature = "lua51")]
 pub unsafe fn lua_getglobal(state: *mut c_void, k: *const c_char) {
     lua_getfield(state, -10002 /* LUA_GLOBALSINDEX */, k);