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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
#.rst:
# FindLua
# -------
#
#
#
# Locate Lua library This module defines
#
# ::
#
# LUA_FOUND - if false, do not try to link to Lua
# LUA_LIBRARIES - both lua and lualib
# LUA_INCLUDE_DIR - where to find lua.h
# LUA_VERSION_STRING - the version of Lua found
# LUA_VERSION_MAJOR - the major version of Lua
# LUA_VERSION_MINOR - the minor version of Lua
# LUA_VERSION_PATCH - the patch version of Lua
#
#
#
# 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/
unset(_lua_include_subdirs)
unset(_lua_library_names)
unset(_lua_append_versions)
# this is a function only to have all the variables inside go away automatically
function(_lua_set_version_vars)
set(LUA_VERSIONS5 5.3 5.2 5.1 5.0)
if (Lua_FIND_VERSION_EXACT)
if (Lua_FIND_VERSION_COUNT GREATER 1)
set(_lua_append_versions ${Lua_FIND_VERSION_MAJOR}.${Lua_FIND_VERSION_MINOR})
endif ()
elseif (Lua_FIND_VERSION)
# once there is a different major version supported this should become a loop
if (NOT Lua_FIND_VERSION_MAJOR GREATER 5)
if (Lua_FIND_VERSION_COUNT EQUAL 1)
set(_lua_append_versions ${LUA_VERSIONS5})
else ()
foreach (subver IN LISTS LUA_VERSIONS5)
if (NOT subver VERSION_LESS ${Lua_FIND_VERSION})
list(APPEND _lua_append_versions ${subver})
endif ()
endforeach ()
endif ()
endif ()
else ()
# once there is a different major version supported this should become a loop
set(_lua_append_versions ${LUA_VERSIONS5})
endif ()
list(APPEND _lua_include_subdirs "include/lua" "include")
foreach (ver IN LISTS _lua_append_versions)
string(REGEX MATCH "^([0-9]+)\\.([0-9]+)$" _ver "${ver}")
list(APPEND _lua_include_subdirs
include/lua${CMAKE_MATCH_1}${CMAKE_MATCH_2}
include/lua${CMAKE_MATCH_1}.${CMAKE_MATCH_2}
include/lua-${CMAKE_MATCH_1}.${CMAKE_MATCH_2}
)
endforeach ()
set(_lua_include_subdirs "${_lua_include_subdirs}" PARENT_SCOPE)
set(_lua_append_versions "${_lua_append_versions}" PARENT_SCOPE)
endfunction(_lua_set_version_vars)
function(_lua_check_header_version _hdr_file)
# At least 5.[012] have different ways to express the version
# so all of them need to be tested. Lua 5.2 defines LUA_VERSION
# and LUA_RELEASE as joined by the C preprocessor, so avoid those.
file(STRINGS "${_hdr_file}" lua_version_strings
REGEX "^#define[ \t]+LUA_(RELEASE[ \t]+\"Lua [0-9]|VERSION([ \t]+\"Lua [0-9]|_[MR])).*")
string(REGEX REPLACE ".*;#define[ \t]+LUA_VERSION_MAJOR[ \t]+\"([0-9])\"[ \t]*;.*" "\\1" LUA_VERSION_MAJOR ";${lua_version_strings};")
if (LUA_VERSION_MAJOR MATCHES "^[0-9]+$")
string(REGEX REPLACE ".*;#define[ \t]+LUA_VERSION_MINOR[ \t]+\"([0-9])\"[ \t]*;.*" "\\1" LUA_VERSION_MINOR ";${lua_version_strings};")
string(REGEX REPLACE ".*;#define[ \t]+LUA_VERSION_RELEASE[ \t]+\"([0-9])\"[ \t]*;.*" "\\1" LUA_VERSION_PATCH ";${lua_version_strings};")
set(LUA_VERSION_STRING "${LUA_VERSION_MAJOR}.${LUA_VERSION_MINOR}.${LUA_VERSION_PATCH}")
else ()
string(REGEX REPLACE ".*;#define[ \t]+LUA_RELEASE[ \t]+\"Lua ([0-9.]+)\"[ \t]*;.*" "\\1" LUA_VERSION_STRING ";${lua_version_strings};")
if (NOT LUA_VERSION_STRING MATCHES "^[0-9.]+$")
string(REGEX REPLACE ".*;#define[ \t]+LUA_VERSION[ \t]+\"Lua ([0-9.]+)\"[ \t]*;.*" "\\1" LUA_VERSION_STRING ";${lua_version_strings};")
endif ()
string(REGEX REPLACE "^([0-9]+)\\.[0-9.]*$" "\\1" LUA_VERSION_MAJOR "${LUA_VERSION_STRING}")
string(REGEX REPLACE "^[0-9]+\\.([0-9]+)[0-9.]*$" "\\1" LUA_VERSION_MINOR "${LUA_VERSION_STRING}")
string(REGEX REPLACE "^[0-9]+\\.[0-9]+\\.([0-9]).*" "\\1" LUA_VERSION_PATCH "${LUA_VERSION_STRING}")
endif ()
foreach (ver IN LISTS _lua_append_versions)
if (ver STREQUAL "${LUA_VERSION_MAJOR}.${LUA_VERSION_MINOR}")
set(LUA_VERSION_MAJOR ${LUA_VERSION_MAJOR} PARENT_SCOPE)
set(LUA_VERSION_MINOR ${LUA_VERSION_MINOR} PARENT_SCOPE)
set(LUA_VERSION_PATCH ${LUA_VERSION_PATCH} PARENT_SCOPE)
set(LUA_VERSION_STRING ${LUA_VERSION_STRING} PARENT_SCOPE)
return()
endif ()
endforeach ()
endfunction(_lua_check_header_version)
_lua_set_version_vars()
if (LUA_INCLUDE_DIR AND EXISTS "${LUA_INCLUDE_DIR}/lua.h")
_lua_check_header_version("${LUA_INCLUDE_DIR}/lua.h")
endif ()
if (NOT LUA_VERSION_STRING)
foreach (subdir IN LISTS _lua_include_subdirs)
unset(LUA_INCLUDE_PREFIX CACHE)
find_path(LUA_INCLUDE_PREFIX ${subdir}/lua.h
HINTS
ENV LUA_DIR
PATHS
~/Library/Frameworks
/Library/Frameworks
/sw # Fink
/opt/local # DarwinPorts
/opt/csw # Blastwave
/opt
)
if (LUA_INCLUDE_PREFIX)
_lua_check_header_version("${LUA_INCLUDE_PREFIX}/${subdir}/lua.h")
if (LUA_VERSION_STRING)
set(LUA_INCLUDE_DIR "${LUA_INCLUDE_PREFIX}/${subdir}")
break()
endif ()
endif ()
endforeach ()
endif ()
unset(_lua_include_subdirs)
unset(_lua_append_versions)
if (LUA_VERSION_STRING)
set(_lua_library_names
lua${LUA_VERSION_MAJOR}${LUA_VERSION_MINOR}
lua${LUA_VERSION_MAJOR}.${LUA_VERSION_MINOR}
lua-${LUA_VERSION_MAJOR}.${LUA_VERSION_MINOR}
lua.${LUA_VERSION_MAJOR}.${LUA_VERSION_MINOR}
)
endif ()
find_library(LUA_LIBRARY
NAMES ${_lua_library_names} lua
HINTS
ENV LUA_DIR
PATH_SUFFIXES lib
PATHS
~/Library/Frameworks
/Library/Frameworks
/sw
/opt/local
/opt/csw
/opt
)
unset(_lua_library_names)
if (LUA_LIBRARY)
# include the math library for Unix
if (UNIX AND NOT APPLE AND NOT BEOS)
find_library(LUA_MATH_LIBRARY m)
set(LUA_LIBRARIES "${LUA_LIBRARY};${LUA_MATH_LIBRARY}")
# include dl library for statically-linked Lua library
get_filename_component(LUA_LIB_EXT ${LUA_LIBRARY} EXT)
if(LUA_LIB_EXT STREQUAL CMAKE_STATIC_LIBRARY_SUFFIX)
list(APPEND LUA_LIBRARIES ${CMAKE_DL_LIBS})
endif()
# For Windows and Mac, don't need to explicitly include the math library
else ()
set(LUA_LIBRARIES "${LUA_LIBRARY}")
endif ()
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(Lua
REQUIRED_VARS LUA_LIBRARIES LUA_INCLUDE_DIR
VERSION_VAR LUA_VERSION_STRING)
mark_as_advanced(LUA_INCLUDE_DIR LUA_LIBRARY LUA_MATH_LIBRARY)
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