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Aegisub/cmake/FindLuaJIT.cmake
wangqr 6702556776 Use system luajit 
And drop luabins from preloaded modules
2019-09-07 22:07:22 -04:00

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#.rst:
# FindLuaJIT
# ----------
#
#
#
# Locate Lua library This module defines
#
# ::
#
# LUAJIT_FOUND - if false, do not try to link to Lua
# LUAJIT_EXECUTABLE - path to luajit command
# LUAJIT_LIBRARIES - both lua and lualib
# LUAJIT_LIBRARY_DIR - list of dir(s) that contain the libraries to link
# LUAJIT_INCLUDE_DIR - where to find lua.h
# LUAJIT_LINK_FLAGS - Link flags that are required, platform dependant
# LUAJIT_VERSION_STRING - the version of Lua found
# LUAJIT_VERSION_MAJOR - the major version of Lua
# LUAJIT_VERSION_MINOR - the minor version of Lua
# LUAJIT_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)
# this is a function only to have all the variables inside go away automatically
function(set_lua_version_vars)
set(LUA_VERSIONS5 5.3 5.2 5.1 5.0)
set(LUAJIT_VERSIONS 2.0)
if (LuaJIT_FIND_VERSION_EXACT)
if (LuaJIT_FIND_VERSION_COUNT GREATER 1)
set(luajit_append_versions ${LuaJIT_FIND_VERSION_MAJOR}.${LuaJIT_FIND_VERSION_MINOR})
endif ()
elseif (LuaJIT_FIND_VERSION)
# once there is a different major version supported this should become a loop
if (NOT LuaJIT_FIND_VERSION_MAJOR GREATER 5)
if (LuaJIT_FIND_VERSION_COUNT EQUAL 1)
set(luajit_append_versions ${LUA_VERSIONS5})
else ()
foreach (subver IN LISTS LUA_VERSIONS5)
if (NOT subver VERSION_LESS ${LuaJIT_FIND_VERSION})
list(APPEND luajit_append_versions ${subver})
endif ()
endforeach ()
endif ()
endif ()
else ()
# once there is a different major version supported this should become a loop
set(luajit_append_versions ${LUA_VERSIONS5})
endif ()
foreach (ver IN LISTS luajit_append_versions LUAJIT_VERSIONS)
string(REGEX MATCH "^([0-9]+)\\.([0-9]+)$" _ver "${ver}")
list(APPEND _luajit_include_subdirs
include/luajit${CMAKE_MATCH_1}${CMAKE_MATCH_2}
include/luajit${CMAKE_MATCH_1}.${CMAKE_MATCH_2}
include/luajit-${CMAKE_MATCH_1}.${CMAKE_MATCH_2}
)
list(APPEND _luajit_library_names
luajit${CMAKE_MATCH_1}${CMAKE_MATCH_2}
luajit${CMAKE_MATCH_1}.${CMAKE_MATCH_2}
luajit.${CMAKE_MATCH_1}.${CMAKE_MATCH_2}
luajit-${CMAKE_MATCH_1}.${CMAKE_MATCH_2}
)
endforeach ()
foreach (ver IN LISTS LUA_VERSIONS5)
string(REGEX MATCH "^([0-9]+)\\.([0-9]+)$" _ver "${ver}")
list(APPEND _luajit_library_names
luajit${CMAKE_MATCH_1}${CMAKE_MATCH_2}
luajit${CMAKE_MATCH_1}.${CMAKE_MATCH_2}
luajit.${CMAKE_MATCH_1}.${CMAKE_MATCH_2}
luajit-${CMAKE_MATCH_1}.${CMAKE_MATCH_2}
)
endforeach ()
set(_luajit_include_subdirs "${_luajit_include_subdirs}" PARENT_SCOPE)
set(_luajit_library_names "${_luajit_library_names}" PARENT_SCOPE)
endfunction(set_lua_version_vars)
set_lua_version_vars()
find_path(LUAJIT_INCLUDE_DIR luajit.h
HINTS
ENV LUAJIT_DIR
PATH_SUFFIXES ${_luajit_include_subdirs} include/luajit-2.1 include/luajit include
PATHS
${LUAJIT_DIR}
~/Library/Frameworks
/Library/Frameworks
/sw # Fink
/opt/local # DarwinPorts
/opt/csw # Blastwave
/opt
)
unset(_luajit_include_subdirs)
find_library(LUAJIT_LIBRARY
NAMES ${_luajit_library_names} luajit
HINTS
ENV LUAJIT_DIR
PATH_SUFFIXES lib
PATHS
${LUAJIT_DIR}
~/Library/Frameworks
/Library/Frameworks
/sw
/opt/local
/opt/csw
/opt
)
unset(_luajit_library_names)
if (LUAJIT_LIBRARY)
# include the math library for Unix
if (UNIX AND NOT APPLE AND NOT BEOS)
find_library(LUAJIT_MATH_LIBRARY m)
set(LUAJIT_LIBRARIES "${LUAJIT_LIBRARY};${LUAJIT_MATH_LIBRARY}")
# For Windows and Mac, don't need to explicitly include the math library
else ()
set(LUAJIT_LIBRARIES "${LUAJIT_LIBRARY}")
endif ()
set(LUAJIT_LIBRARY_DIR )
foreach (lib ${LUAJIT_LIBRARIES})
get_filename_component(lib_dir ${lib} DIRECTORY CACHE)
list(APPEND LUAJIT_LIBRARY_DIR ${lib_dir})
endforeach ()
endif ()
# This macro is taken word-for-word from the FindLua module and placed into a macro to keep the semantics the same
macro(get_lua_versions include_dir)
# At least 5.[012] have different ways to express the version
# so all of them need to be tested. Lua 5.2 defines LUA_VERSION
# and LUA_RELEASE as joined by the C preprocessor, so avoid those.
file(STRINGS "${${include_dir}}/lua.h" lua_version_strings
REGEX "^#define[ \t]+LUA_(RELEASE[ \t]+\"Lua [0-9]|VERSION([ \t]+\"Lua [0-9]|_[MR])).*")
string(REGEX REPLACE ".*;#define[ \t]+LUA_VERSION_MAJOR[ \t]+\"([0-9])\"[ \t]*;.*" "\\1" LUAJIT_LUA_VERSION_MAJOR ";${lua_version_strings};")
if (LUAJIT_LUA_VERSION_MAJOR MATCHES "^[0-9]+$")
string(REGEX REPLACE ".*;#define[ \t]+LUA_VERSION_MINOR[ \t]+\"([0-9])\"[ \t]*;.*" "\\1" LUAJIT_LUA_VERSION_MINOR ";${lua_version_strings};")
string(REGEX REPLACE ".*;#define[ \t]+LUA_VERSION_RELEASE[ \t]+\"([0-9])\"[ \t]*;.*" "\\1" LUAJIT_LUA_VERSION_PATCH ";${lua_version_strings};")
set(LUA_VERSION_STRING "${LUAJIT_LUA_VERSION_MAJOR}.${LUAJIT_LUA_VERSION_MINOR}.${LUAJIT_LUA_VERSION_PATCH}")
else ()
string(REGEX REPLACE ".*;#define[ \t]+LUA_RELEASE[ \t]+\"Lua ([0-9.]+)\"[ \t]*;.*" "\\1" LUAJIT_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" LUAJIT_LUA_VERSION_STRING ";${lua_version_strings};")
endif ()
string(REGEX REPLACE "^([0-9]+)\\.[0-9.]*$" "\\1" LUAJIT_LUA_VERSION_MAJOR "${LUAJIT_LUA_VERSION_STRING}")
string(REGEX REPLACE "^[0-9]+\\.([0-9]+)[0-9.]*$" "\\1" LUAJIT_LUA_VERSION_MINOR "${LUAJIT_LUA_VERSION_STRING}")
string(REGEX REPLACE "^[0-9]+\\.[0-9]+\\.([0-9]).*" "\\1" LUAJIT_LUA_VERSION_PATCH "${LUAJIT_LUA_VERSION_STRING}")
endif ()
unset(lua_version_strings)
endmacro(get_lua_versions)
if (LUAJIT_INCLUDE_DIR AND EXISTS "${LUAJIT_INCLUDE_DIR}/luajit.h")
# LuaJIT defines two preprocessor macros:
# LUA_VERSION -> version string with lua version in it
# LUA_VERSION_NUM -> numeric representation, i.e. 20003 for 2.0.3
# This just parses the LUAJIT_VERSION macro and extracts the version.
file(STRINGS "${LUAJIT_INCLUDE_DIR}/luajit.h" version_strings
REGEX "^#define[ \t]+LUAJIT_VERSION?[ \t]+(\"LuaJIT [0-9\\.]+(-(beta|alpha)[0-9]*)?\").*")
string(REGEX REPLACE ".*;#define[ \t]+LUAJIT_VERSION[ \t]+\"LuaJIT ([0-9\\.]+(-(beta|alpha)[0-9]*)?)\"[ \t]*;.*" "\\1" LUAJIT_VERSION_STRING_SHORT ";${version_strings};")
string(REGEX REPLACE ".*;([0-9]+\\.[0-9]+\\.[0-9]+(-(beta|alpha)[0-9]*)?);.*" "\\1" luajit_version_num ";${LUAJIT_VERSION_STRING_SHORT};")
string(REGEX REPLACE "^([0-9]+)\\.[0-9]+\\.(-(beta|alpha)[0-9]*)?$" "\\1" LUAJIT_VERSION_MAJOR "${luajit_version_num}")
string(REGEX REPLACE "^[0-9]+\\.([0-9]+)\\.[0-9](-(beta|alpha)[0-9]*)?$" "\\1" LUAJIT_VERSION_MINOR "${luajit_version_num}")
string(REGEX REPLACE "^[0-9]+\\.[0-9]+\\.([0-9]+(-(beta|alpha)[0-9]*)?)$" "\\1" LUAJIT_VERSION_PATCH "${luajit_version_num}")
get_lua_versions(LUAJIT_INCLUDE_DIR)
set(LUAJIT_VERSION_STRING "${LUAJIT_LUA_VERSION_STRING} (${LUAJIT_VERSION_STRING_SHORT})")
message("Found LuaJIT ${LUAJIT_VERSION_STRING}")
endif()
if(APPLE)
# Not sure why this is true, but its mentioned here:
# http://luajit.org/install.html#embed
set(LUAJIT_LINK_FLAGS "-pagezero_size 10000 -image_base 100000000")
else()
set(LUAJIT_LINK_FLAGS "")
endif()
find_program(LUAJIT_EXECUTABLE luajit)
include(FindPackageHandleStandardArgs)
# handle the QUIETLY and REQUIRED arguments and set LuaJIT_FOUND to TRUE if
# all listed variables are TRUE
FIND_PACKAGE_HANDLE_STANDARD_ARGS(LuaJIT
FOUND_VAR LuaJIT_FOUND
REQUIRED_VARS LUAJIT_EXECUTABLE LUAJIT_LIBRARIES LUAJIT_INCLUDE_DIR
VERSION_VAR LUAJIT_VERSION_STRING)
mark_as_advanced(LUAJIT_INCLUDE_DIR LUAJIT_LIBRARY LUAJIT_MATH_LIBRARY LUAJIT_LIBRARY_DIR LUAJIT_LINK_FLAGS)
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