# 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 # # 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 5.4 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(FindPackageHandleStandardArgs) # 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)