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