findlua.cmake

# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
	# file Copyright.txt or https://cmake.org/licensing for details.
	#.rst:
	# FindLua51
	# ---------
	#
	#
	#
	# Locate Lua library This module defines
	#
	# ::
	#
	# LUA51_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
	#
	# This is because, the lua location is not standardized and may exist in
	# locations other than lua/
	find_path(LUA_INCLUDE_DIR lua.h
	HINTS
	ENV LUA_DIR
	PATH_SUFFIXES include/lua51 include/lua5.1 include/lua-5.1 include/lua include
	PATHS
	~/Library/Frameworks
	/Library/Frameworks
	/sw # Fink
	/opt/local # DarwinPorts
	/opt/csw # Blastwave
	/opt
	)
	find_library(LUA_LIBRARY
	NAMES lua51 lua5.1 lua-5.1 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 AND NOT HAIKU)
	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(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
	# handle the QUIETLY and REQUIRED arguments and set LUA_FOUND to TRUE if
	# all listed variables are TRUE
	FIND_PACKAGE_HANDLE_STANDARD_ARGS(Lua51
	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)