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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:
FindSDL_mixer
-------------
Finds the SDL_mixer library that provides an audio mixer with support for
various file formats in SDL (Simple DirectMedia Layer) applications.
.. note::
This module is specifically intended for SDL_mixer version 1. Starting with
version 2.5, SDL_mixer provides a CMake package configuration file when built
with CMake and should be found using ``find_package(SDL2_mixer)``. These
newer versions provide :ref:`Imported Targets` that encapsulate usage
requirements. Refer to the official SDL documentation for more information.
Result Variables
^^^^^^^^^^^^^^^^
This module defines the following variables:
``SDL_mixer_FOUND``
Boolean indicating whether the (requested version of) SDL_mixer library is
found. For backward compatibility, the ``SDL_MIXER_FOUND`` variable is also
set to the same value.
``SDL_MIXER_VERSION_STRING``
The human-readable string containing the version of SDL_mixer found.
``SDL_MIXER_INCLUDE_DIRS``
Include directories containing headers needed to use the SDL_mixer library.
``SDL_MIXER_LIBRARIES``
Libraries needed to link against to use SDL_mixer.
Hints
^^^^^
This module accepts the following variables:
``SDLDIR``
Environment variable that can be set to help locate an SDL library installed
in a custom location. It should point to the installation destination that
was used when configuring, building, and installing SDL library:
``./configure --prefix=$SDLDIR``.
Deprecated Variables
^^^^^^^^^^^^^^^^^^^^
For backward compatibility the following variables are also set:
``SDLMIXER_FOUND``
.. deprecated:: 2.8.10
Use ``SDL_mixer_FOUND``, which has the same value.
``SDLMIXER_INCLUDE_DIR``
.. deprecated:: 2.8.10
Use ``SDL_MIXER_INCLUDE_DIRS``, which has the same value.
``SDLMIXER_LIBRARY``
.. deprecated:: 2.8.10
Use ``SDL_MIXER_LIBRARIES``, which has the same value.
Examples
^^^^^^^^
Finding SDL_mixer library and creating an imported interface target for linking
it to a project target:
.. code-block:: cmake
find_package(SDL_mixer)
if(SDL_mixer_FOUND AND NOT TARGET SDL::SDL_mixer)
add_library(SDL::SDL_mixer INTERFACE IMPORTED)
set_target_properties(
SDL::SDL_mixer
PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES "${SDL_MIXER_INCLUDE_DIRS}"
INTERFACE_LINK_LIBRARIES "${SDL_MIXER_LIBRARIES}"
)
endif()
target_link_libraries(project_target PRIVATE SDL::SDL_mixer)
When working with SDL_mixer version 2, the upstream package provides the
``SDL2_mixer::SDL2_mixer`` imported target directly. It can be used in a
project without using this module:
.. code-block:: cmake
find_package(SDL2_mixer)
target_link_libraries(project_target PRIVATE SDL2_mixer::SDL2_mixer)
See Also
^^^^^^^^
* The :module:`FindSDL` module to find the main SDL library.
#]=======================================================================]
cmake_policy(PUSH)
cmake_policy(SET CMP0159 NEW) # file(STRINGS) with REGEX updates CMAKE_MATCH_<n>
if(NOT SDL_MIXER_INCLUDE_DIR AND SDLMIXER_INCLUDE_DIR)
set(SDL_MIXER_INCLUDE_DIR ${SDLMIXER_INCLUDE_DIR} CACHE PATH "directory cache
entry initialized from old variable name")
endif()
find_path(SDL_MIXER_INCLUDE_DIR SDL_mixer.h
HINTS
ENV SDLMIXERDIR
ENV SDLDIR
PATH_SUFFIXES SDL
# path suffixes to search inside ENV{SDLDIR}
include/SDL include/SDL12 include/SDL11 include
)
if(CMAKE_SIZEOF_VOID_P EQUAL 8)
set(VC_LIB_PATH_SUFFIX lib/x64)
else()
set(VC_LIB_PATH_SUFFIX lib/x86)
endif()
if(NOT SDL_MIXER_LIBRARY AND SDLMIXER_LIBRARY)
set(SDL_MIXER_LIBRARY ${SDLMIXER_LIBRARY} CACHE FILEPATH "file cache entry
initialized from old variable name")
endif()
find_library(SDL_MIXER_LIBRARY
NAMES SDL_mixer
HINTS
ENV SDLMIXERDIR
ENV SDLDIR
PATH_SUFFIXES lib ${VC_LIB_PATH_SUFFIX}
)
if(SDL_MIXER_INCLUDE_DIR AND EXISTS "${SDL_MIXER_INCLUDE_DIR}/SDL_mixer.h")
file(STRINGS "${SDL_MIXER_INCLUDE_DIR}/SDL_mixer.h" SDL_MIXER_VERSION_MAJOR_LINE REGEX "^#define[ \t]+SDL_MIXER_MAJOR_VERSION[ \t]+[0-9]+$")
file(STRINGS "${SDL_MIXER_INCLUDE_DIR}/SDL_mixer.h" SDL_MIXER_VERSION_MINOR_LINE REGEX "^#define[ \t]+SDL_MIXER_MINOR_VERSION[ \t]+[0-9]+$")
file(STRINGS "${SDL_MIXER_INCLUDE_DIR}/SDL_mixer.h" SDL_MIXER_VERSION_PATCH_LINE REGEX "^#define[ \t]+SDL_MIXER_PATCHLEVEL[ \t]+[0-9]+$")
string(REGEX REPLACE "^#define[ \t]+SDL_MIXER_MAJOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL_MIXER_VERSION_MAJOR "${SDL_MIXER_VERSION_MAJOR_LINE}")
string(REGEX REPLACE "^#define[ \t]+SDL_MIXER_MINOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL_MIXER_VERSION_MINOR "${SDL_MIXER_VERSION_MINOR_LINE}")
string(REGEX REPLACE "^#define[ \t]+SDL_MIXER_PATCHLEVEL[ \t]+([0-9]+)$" "\\1" SDL_MIXER_VERSION_PATCH "${SDL_MIXER_VERSION_PATCH_LINE}")
set(SDL_MIXER_VERSION_STRING ${SDL_MIXER_VERSION_MAJOR}.${SDL_MIXER_VERSION_MINOR}.${SDL_MIXER_VERSION_PATCH})
unset(SDL_MIXER_VERSION_MAJOR_LINE)
unset(SDL_MIXER_VERSION_MINOR_LINE)
unset(SDL_MIXER_VERSION_PATCH_LINE)
unset(SDL_MIXER_VERSION_MAJOR)
unset(SDL_MIXER_VERSION_MINOR)
unset(SDL_MIXER_VERSION_PATCH)
endif()
set(SDL_MIXER_LIBRARIES ${SDL_MIXER_LIBRARY})
set(SDL_MIXER_INCLUDE_DIRS ${SDL_MIXER_INCLUDE_DIR})
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(SDL_mixer
REQUIRED_VARS SDL_MIXER_LIBRARIES SDL_MIXER_INCLUDE_DIRS
VERSION_VAR SDL_MIXER_VERSION_STRING)
# for backward compatibility
set(SDLMIXER_LIBRARY ${SDL_MIXER_LIBRARIES})
set(SDLMIXER_INCLUDE_DIR ${SDL_MIXER_INCLUDE_DIRS})
set(SDLMIXER_FOUND ${SDL_mixer_FOUND})
mark_as_advanced(SDL_MIXER_LIBRARY SDL_MIXER_INCLUDE_DIR)
cmake_policy(POP)
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