From 1f856ecd8ead5b3f7933bc94c77e9b7c77399197 Mon Sep 17 00:00:00 2001
From: planetmaker <i.vonborstel@tu-bs.de>
Date: Thu, 16 Sep 2021 17:13:20 +0200
Subject: [PATCH] Add: Support for Lua 5.4 bindings

---
 CMakeModules/FindLua54.cmake   | 81 ++++++++++++++++++++++++++++++++++
 CMakeModules/FindLuabind.cmake | 24 +++++++---
 2 files changed, 100 insertions(+), 5 deletions(-)
 create mode 100644 CMakeModules/FindLua54.cmake

diff --git a/CMakeModules/FindLua54.cmake b/CMakeModules/FindLua54.cmake
new file mode 100644
index 000000000..89812a406
--- /dev/null
+++ b/CMakeModules/FindLua54.cmake
@@ -0,0 +1,81 @@
+# Locate Lua library
+# This module defines
+#  LUA54_FOUND, if false, do not try to link to Lua
+#  LUA_LIBRARIES
+#  LUA_INCLUDE_DIR, where to find lua.h
+#  LUA_VERSION_STRING, the version of Lua found (since CMake 2.8.8)
+#
+# Note that the expected include convention is
+#  #include "lua.h"
+# and not
+#  #include <lua/lua.h>
+# This is because, the lua location is not standardized and may exist
+# in locations other than lua/
+
+#=============================================================================
+# Copyright 2007-2009 Kitware, Inc.
+#
+# Distributed under the OSI-approved BSD License (the "License");
+# see accompanying file Copyright.txt for details.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+# (To distribute this file outside of CMake, substitute the full
+#  License text for the above reference.)
+
+find_path(LUA_INCLUDE_DIR lua.h
+  HINTS
+    ENV LUA_DIR
+  PATH_SUFFIXES include/lua54 include/lua5.4 include/lua-5.4 include/lua include
+  PATHS
+  ~/Library/Frameworks
+  /Library/Frameworks
+  /sw # Fink
+  /opt/local # DarwinPorts
+  /opt/csw # Blastwave
+  /opt
+)
+
+find_library(LUA_LIBRARY
+  NAMES lua54 lua5.4 lua-5.4 lua
+  HINTS
+    ENV LUA_DIR
+  PATH_SUFFIXES lib
+  PATHS
+  ~/Library/Frameworks
+  /Library/Frameworks
+  /sw
+  /opt/local
+  /opt/csw
+  /opt
+)
+
+if(LUA_LIBRARY)
+  # include the math library for Unix
+  if(UNIX AND NOT APPLE AND NOT BEOS)
+    find_library(LUA_MATH_LIBRARY m)
+    set( LUA_LIBRARIES "${LUA_LIBRARY};${LUA_MATH_LIBRARY}" CACHE STRING "Lua Libraries")
+  # For Windows and Mac, don't need to explicitly include the math library
+  else()
+    set( LUA_LIBRARIES "${LUA_LIBRARY}" CACHE STRING "Lua Libraries")
+  endif()
+endif()
+
+if(LUA_INCLUDE_DIR AND EXISTS "${LUA_INCLUDE_DIR}/lua.h")
+  file(STRINGS "${LUA_INCLUDE_DIR}/lua.h" lua_version_str REGEX "^#define[ \t]+LUA_RELEASE[ \t]+\"Lua .+\"")
+
+  string(REGEX REPLACE "^#define[ \t]+LUA_RELEASE[ \t]+\"Lua ([^\"]+)\".*" "\\1" LUA_VERSION_STRING "${lua_version_str}")
+  unset(lua_version_str)
+endif()
+
+include(FindPackageHandleStandardArgs)
+# handle the QUIETLY and REQUIRED arguments and set LUA_FOUND to TRUE if
+# all listed variables are TRUE
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(Lua54
+                                  REQUIRED_VARS LUA_LIBRARIES LUA_INCLUDE_DIR
+                                  VERSION_VAR LUA_VERSION_STRING)
+
+mark_as_advanced(LUA_INCLUDE_DIR LUA_LIBRARIES LUA_LIBRARY LUA_MATH_LIBRARY)
+
diff --git a/CMakeModules/FindLuabind.cmake b/CMakeModules/FindLuabind.cmake
index dae1dbd99..6b68821b6 100644
--- a/CMakeModules/FindLuabind.cmake
+++ b/CMakeModules/FindLuabind.cmake
@@ -10,18 +10,32 @@ MACRO(FIND_CORRECT_LUA_VERSION)
   IF(LUABIND_LIBRARY_RELEASE MATCHES "\\.so")
     INCLUDE(CheckDepends)
 
-    # check for Lua 5.3
-    SET(LUA53_LIBRARIES liblua5.3 liblua-5.3 liblua.so.5.3)
+    # check for Lua 5.4
+    SET(LUA54_LIBRARIES liblua5.4 liblua-5.4 liblua.so.5.4)
 
-    FOREACH(_LIB ${LUA53_LIBRARIES})
+    FOREACH(_LIB ${LUA54_LIBRARIES})
       CHECK_LINKED_LIBRARY(LUABIND_LIBRARY_RELEASE _LIB LUALIB_FOUND)
       IF(LUALIB_FOUND)
-        MESSAGE(STATUS "Luabind is using Lua 5.3")
-        FIND_PACKAGE(Lua53 REQUIRED)
+        MESSAGE(STATUS "Luabind is using Lua 5.4")
+        FIND_PACKAGE(Lua54 REQUIRED)
         BREAK()
       ENDIF()
     ENDFOREACH()
 
+    IF(NOT LUALIB_FOUND)
+      # check for Lua 5.3
+      SET(LUA53_LIBRARIES liblua5.3 liblua-5.3 liblua.so.5.3)
+
+      FOREACH(_LIB ${LUA53_LIBRARIES})
+        CHECK_LINKED_LIBRARY(LUABIND_LIBRARY_RELEASE _LIB LUALIB_FOUND)
+        IF(LUALIB_FOUND)
+          MESSAGE(STATUS "Luabind is using Lua 5.3")
+          FIND_PACKAGE(Lua53 REQUIRED)
+          BREAK()
+        ENDIF()
+      ENDFOREACH()
+    ENDIF()
+
     IF(NOT LUALIB_FOUND)
       # check for Lua 5.2
       SET(LUA52_LIBRARIES liblua5.2 liblua-5.2 liblua.so.5.2)