From b37470526c798c5b4d7411c6eb9dc060a129557a Mon Sep 17 00:00:00 2001
From: David Demelier <markand@malikania.fr>
Date: Wed, 18 Dec 2013 13:36:36 +0100
Subject: [PATCH] Add support for Lua 5.2

---
 CMakeLists.txt                | 32 ++++++++------
 cmake/Modules/FindLua52.cmake | 81 +++++++++++++++++++++++++++++++++++
 2 files changed, 100 insertions(+), 13 deletions(-)
 create mode 100644 cmake/Modules/FindLua52.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2fecd37..1f53740 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,9 +1,9 @@
 project(Lua-cURL C)
 
-cmake_minimum_required(VERSION 2.6)
+cmake_minimum_required(VERSION 2.8)
 
 option(USE_LUA "Use Lua (also called 'C' Lua) version 5.1 includes (default)" ON)
-#option(USE_LUA52 "Use Lua (also called 'C' Lua) version 5.2 includes (currelty unsupported)")
+option(USE_LUA52 "Use Lua (also called 'C' Lua) version 5.2 includes (currelty unsupported)")
 option(USE_LUAJIT "Use LuaJIT includes instead of 'C' Lua ones (recommended, if you're using LuaJIT, but disabled by default)")
 
 
@@ -31,21 +31,23 @@ if(USE_LUAJIT)
 	find_package(LuaJIT REQUIRED)
 	set(USE_LUA52 OFF)
 	set(USE_LUA OFF)
-endif()
-
-#if(USE_LUA52)
-##TODO
-#	find_package(Lua52 REQUIRED)
-#	unset(USE_LUA)
-#endif()
-
-if(USE_LUA)
+elseif(USE_LUA52)
+	find_package(Lua52 REQUIRED)
+	set(USE_LUA OFF)
+	set(USE_LUAJIT OFF)
+elseif(USE_LUA)
 	find_package(Lua51 REQUIRED)
+	set(USE_LUA52 OFF)
+	set(USE_LUAJIT OFF)
 endif()
 
 
 find_package(CURL REQUIRED)
-include_directories(${LUA_INCLUDE_DIR})
+
+include_directories(
+	${LUA_INCLUDE_DIR}
+	${CURL_INCLUDE_DIRS}
+)
 
 set(_MODULE_LINK "${CURL_LIBRARY}")
 get_filename_component(_lua_lib_dir ${LUA_LIBRARY} PATH)
@@ -62,7 +64,11 @@ if(WIN32)
     # Windows sprintf()/strtod() handle NaN/inf differently. Not supported.
     add_definitions(-DDISABLE_INVALID_NUMBERS)
 else()
-    set(_lua_module_dir "${_lua_lib_dir}/lua/5.1")
+    if (USE_LUA52)
+        set(_lua_module_dir "${_lua_lib_dir}/lua/5.2")
+    else ()
+	set(_lua_module_dir "${_lua_lib_dir}/lua/5.1")
+    endif ()
 endif()
 
 
diff --git a/cmake/Modules/FindLua52.cmake b/cmake/Modules/FindLua52.cmake
new file mode 100644
index 0000000..6a45f74
--- /dev/null
+++ b/cmake/Modules/FindLua52.cmake
@@ -0,0 +1,81 @@
+# Locate Lua library
+# This module defines
+#  LUA52_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/lua52 include/lua5.2 include/lua include
+  PATHS
+  ~/Library/Frameworks
+  /Library/Frameworks
+  /sw # Fink
+  /opt/local # DarwinPorts
+  /opt/csw # Blastwave
+  /opt
+)
+
+FIND_LIBRARY(LUA_LIBRARY 
+  NAMES lua52 lua5.2 lua-5.2 lua
+  HINTS
+  $ENV{LUA_DIR}
+  PATH_SUFFIXES lib64 lib
+  PATHS
+  ~/Library/Frameworks
+  /Library/Frameworks
+  /sw
+  /opt/local
+  /opt/csw
+  /opt
+)
+
+IF(LUA_LIBRARY)
+  # include the math library for Unix
+  IF(UNIX AND NOT APPLE)
+    FIND_LIBRARY(LUA_MATH_LIBRARY m)
+    SET( LUA_LIBRARIES "${LUA_LIBRARY};${LUA_MATH_LIBRARY}" CACHE STRING "Lua Libraries")
+  # For Windows and Mac, don't need to explicitly include the math library
+  ELSE(UNIX AND NOT APPLE)
+    SET( LUA_LIBRARIES "${LUA_LIBRARY}" CACHE STRING "Lua Libraries")
+  ENDIF(UNIX AND NOT APPLE)
+ENDIF(LUA_LIBRARY)
+
+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(Lua52
+                                  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)
+