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93 lines
2.6 KiB
CMake
93 lines
2.6 KiB
CMake
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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# file LICENSE.rst or https://cmake.org/licensing for details.
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#[=======================================================================[.rst:
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FindALSA
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--------
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Finds the Advanced Linux Sound Architecture (ALSA) library (``asound``).
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Imported Targets
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^^^^^^^^^^^^^^^^
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This module provides the following :ref:`Imported Targets`:
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``ALSA::ALSA``
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.. versionadded:: 3.12
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Target encapsulating the ALSA library usage requirements. This target is
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available only if ALSA is found.
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Result Variables
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^^^^^^^^^^^^^^^^
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This module defines the following variables:
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``ALSA_FOUND``
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Boolean indicating whether the ALSA library is found.
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``ALSA_LIBRARIES``
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List of libraries needed for linking to use ALSA library.
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``ALSA_INCLUDE_DIRS``
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Include directories containing headers needed to use ALSA library.
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Cache Variables
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^^^^^^^^^^^^^^^
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The following cache variables may also be set:
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``ALSA_INCLUDE_DIR``
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The ALSA include directory.
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``ALSA_LIBRARY``
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The absolute path of the asound library.
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Examples
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^^^^^^^^
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Finding the ALSA library and linking it to a project target:
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.. code-block:: cmake
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find_package(ALSA)
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target_link_libraries(project_target PRIVATE ALSA::ALSA)
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#]=======================================================================]
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cmake_policy(PUSH)
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cmake_policy(SET CMP0159 NEW) # file(STRINGS) with REGEX updates CMAKE_MATCH_<n>
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find_path(ALSA_INCLUDE_DIR NAMES alsa/asoundlib.h
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DOC "The ALSA (asound) include directory"
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)
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find_library(ALSA_LIBRARY NAMES asound
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DOC "The ALSA (asound) library"
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)
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if(ALSA_INCLUDE_DIR AND EXISTS "${ALSA_INCLUDE_DIR}/alsa/version.h")
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file(STRINGS "${ALSA_INCLUDE_DIR}/alsa/version.h" alsa_version_str REGEX "^#define[\t ]+SND_LIB_VERSION_STR[\t ]+\".*\"")
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string(REGEX REPLACE "^.*SND_LIB_VERSION_STR[\t ]+\"([^\"]*)\".*$" "\\1" ALSA_VERSION_STRING "${alsa_version_str}")
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unset(alsa_version_str)
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endif()
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include(FindPackageHandleStandardArgs)
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find_package_handle_standard_args(ALSA
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REQUIRED_VARS ALSA_LIBRARY ALSA_INCLUDE_DIR
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VERSION_VAR ALSA_VERSION_STRING)
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if(ALSA_FOUND)
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set( ALSA_LIBRARIES ${ALSA_LIBRARY} )
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set( ALSA_INCLUDE_DIRS ${ALSA_INCLUDE_DIR} )
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if(NOT TARGET ALSA::ALSA)
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add_library(ALSA::ALSA UNKNOWN IMPORTED)
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set_target_properties(ALSA::ALSA PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${ALSA_INCLUDE_DIRS}")
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set_property(TARGET ALSA::ALSA APPEND PROPERTY IMPORTED_LOCATION "${ALSA_LIBRARY}")
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endif()
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endif()
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mark_as_advanced(ALSA_INCLUDE_DIR ALSA_LIBRARY)
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cmake_policy(POP)
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