cmake/FindAlsa.cmake

   1 # Alsa check, based on libkmid/configure.in.in.
   2 # Only the support for Alsa >= 0.9.x was included; 0.5.x was dropped (but feel free to re-add it if you need it)
   3 # It defines ...
   4 # It offers the following macros:
   5 #  ALSA_CONFIGURE_FILE(config_header) - generate a config.h, typical usage:
   6 #                                       ALSA_CONFIGURE_FILE(${CMAKE_BINARY_DIR}/config-alsa.h)
   7 #  ALSA_VERSION_STRING(version_string)  looks for alsa/version.h and reads the version string into
   8 #                                       the first argument passed to the macro
   9
  10 # Copyright (c) 2006, David Faure, <faure@kde.org>
  11 # Copyright (c) 2007, Matthias Kretz <kretz@kde.org>
  12 #
  13 # Redistribution and use is allowed according to the terms of the BSD license.
  14 # For details see the accompanying COPYING-CMAKE-SCRIPTS file.
  15
  16 include(CheckIncludeFiles)
  17 include(CheckIncludeFileCXX)
  18 include(CheckLibraryExists)
  19
  20 # Already done by toplevel
  21 find_library(ASOUND_LIBRARY asound)
  22 set(ASOUND_LIBRARY_DIR "")
  23 if(ASOUND_LIBRARY)
  24    get_filename_component(ASOUND_LIBRARY_DIR ${ASOUND_LIBRARY} PATH)
  25 endif(ASOUND_LIBRARY)
  26
  27 check_library_exists(asound snd_seq_create_simple_port "${ASOUND_LIBRARY_DIR}" HAVE_LIBASOUND2)
  28 if(HAVE_LIBASOUND2)
  29     message(STATUS "Found ALSA: ${ASOUND_LIBRARY}")
  30 else(HAVE_LIBASOUND2)
  31     message(STATUS "ALSA not found")
  32 endif(HAVE_LIBASOUND2)
  33 set(ALSA_FOUND ${HAVE_LIBASOUND2})
  34
  35 find_path(ALSA_INCLUDES alsa/version.h)
  36
  37 macro(ALSA_VERSION_STRING _result)
  38     # check for version in alsa/version.h
  39     if(ALSA_INCLUDES)
  40         file(READ "${ALSA_INCLUDES}/alsa/version.h" _ALSA_VERSION_CONTENT)
  41         string(REGEX REPLACE ".*SND_LIB_VERSION_STR.*\"(.*)\".*" "\\1" ${_result} ${_ALSA_VERSION_CONTENT})
  42     else(ALSA_INCLUDES)
  43         message(STATUS "ALSA version not known. ALSA output will probably not work correctly.")
  44     endif(ALSA_INCLUDES)
  45 endmacro(ALSA_VERSION_STRING _result)
  46
  47
  48 get_filename_component(_FIND_ALSA_MODULE_DIR ${CMAKE_CURRENT_LIST_FILE} PATH)
  49 macro(ALSA_CONFIGURE_FILE _destFile)
  50     check_include_files(sys/soundcard.h HAVE_SYS_SOUNDCARD_H)
  51     check_include_files(machine/soundcard.h HAVE_MACHINE_SOUNDCARD_H)
  52
  53     check_include_files(linux/awe_voice.h HAVE_LINUX_AWE_VOICE_H)
  54     check_include_files(awe_voice.h HAVE_AWE_VOICE_H)
  55     check_include_files(/usr/src/sys/i386/isa/sound/awe_voice.h HAVE__USR_SRC_SYS_I386_ISA_SOUND_AWE_VOICE_H)
  56     check_include_files(/usr/src/sys/gnu/i386/isa/sound/awe_voice.h HAVE__USR_SRC_SYS_GNU_I386_ISA_SOUND_AWE_VOICE_H)
  57
  58     check_include_file_cxx(sys/asoundlib.h HAVE_SYS_ASOUNDLIB_H)
  59     check_include_file_cxx(alsa/asoundlib.h HAVE_ALSA_ASOUNDLIB_H)
  60
  61     check_library_exists(asound snd_pcm_resume "${ASOUND_LIBRARY_DIR}" ASOUND_HAS_SND_PCM_RESUME)
  62     if(ASOUND_HAS_SND_PCM_RESUME)
  63         set(HAVE_SND_PCM_RESUME 1)
  64     endif(ASOUND_HAS_SND_PCM_RESUME)
  65
  66     configure_file(${_FIND_ALSA_MODULE_DIR}/config-alsa.h.cmake ${_destFile})
  67 endmacro(ALSA_CONFIGURE_FILE _destFile)
  68
  69 mark_as_advanced(ALSA_INCLUDES ASOUND_LIBRARY)