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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file LICENSE.rst or https://cmake.org/licensing for details.
#[=======================================================================[.rst:
FindLua51
---------
.. note::
This module is specifically for Lua version branch 5.1, which is obsolete and
not maintained anymore. In new code use the latest supported Lua version and
the version-agnostic module :module:`FindLua` instead.
Finds the Lua library. Lua is a embeddable scripting language.
When working with Lua, its library headers are intended to be included in
project source code as:
.. code-block:: c
#include <lua.h>
and not:
.. code-block:: c
#include <lua/lua.h>
This is because, the location of Lua headers may differ across platforms and may
exist in locations other than ``lua/``.
Result Variables
^^^^^^^^^^^^^^^^
This module defines the following variables:
``Lua51_FOUND``
Boolean indicating whether Lua is found. For backward compatibility, the
``LUA51_FOUND`` variable is also set to the same value.
``LUA_VERSION_STRING``
The version of Lua found.
Cache Variables
^^^^^^^^^^^^^^^
The following cache variables may also be set:
``LUA_INCLUDE_DIR``
The directory containing the Lua header files, such as ``lua.h``,
``lualib.h``, and ``lauxlib.h``, needed to use Lua.
``LUA_LIBRARIES``
Libraries needed to link against to use Lua.
Examples
^^^^^^^^
Finding the Lua 5.1 library and creating an interface :ref:`imported target
<Imported Targets>` that encapsulates its usage requirements for linking to a
project target:
.. code-block:: cmake
find_package(Lua51)
if(Lua51_FOUND AND NOT TARGET Lua51::Lua51)
add_library(Lua51::Lua51 INTERFACE IMPORTED)
set_target_properties(
Lua51::Lua51
PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES "${LUA_INCLUDE_DIR}"
INTERFACE_LINK_LIBRARIES "${LUA_LIBRARIES}"
)
endif()
target_link_libraries(project_target PRIVATE Lua51::Lua51)
See Also
^^^^^^^^
* The :module:`FindLua` module to find Lua in version-agnostic way.
#]=======================================================================]
cmake_policy(PUSH)
cmake_policy(SET CMP0159 NEW) # file(STRINGS) with REGEX updates CMAKE_MATCH_<n>
find_path(LUA_INCLUDE_DIR lua.h
HINTS
ENV LUA_DIR
PATH_SUFFIXES lua51 lua5.1 lua-5.1 lua
PATHS
~/Library/Frameworks
/Library/Frameworks
/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
/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(FindPackageHandleStandardArgs)
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)
cmake_policy(POP)
|
