1 files changed, 46 insertions, 0 deletions

diff --git a/cmake/modules/FindAlsa.cmake b/cmake/modules/FindAlsa.cmake
new file mode 100644
index 0000000..c99f509
--- /dev/null
+++ b/cmake/modules/FindAlsa.cmake
@@ -0,0 +1,46 @@
+#.rst:
+# FindAlsa
+# --------
+# Finds the Alsa library
+#
+# This will will define the following variables::
+#
+# ALSA_FOUND - system has Alsa
+# ALSA_INCLUDE_DIRS - the Alsa include directory
+# ALSA_LIBRARIES - the Alsa libraries
+# ALSA_DEFINITIONS - the Alsa compile definitions
+#
+# and the following imported targets::
+#
+#   ALSA::ALSA   - The Alsa library
+
+if(PKG_CONFIG_FOUND)
+  pkg_check_modules(PC_ALSA alsa QUIET)
+endif()
+
+find_path(ALSA_INCLUDE_DIR NAMES alsa/asoundlib.h
+                           PATHS ${PC_ALSA_INCLUDEDIR})
+find_library(ALSA_LIBRARY NAMES asound
+                          PATHS ${PC_ALSA_LIBDIR})
+
+set(ALSA_VERSION ${PC_ALSA_VERSION})
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(Alsa
+                                  REQUIRED_VARS ALSA_LIBRARY ALSA_INCLUDE_DIR
+                                  VERSION_VAR ALSA_VERSION)
+
+if(ALSA_FOUND)
+  set(ALSA_INCLUDE_DIRS "") # Don't want these added as 'timer.h' is a dangerous file
+  set(ALSA_LIBRARIES ${ALSA_LIBRARY})
+  set(ALSA_DEFINITIONS -DHAVE_ALSA=1 -DUSE_ALSA=1)
+
+  if(NOT TARGET ALSA::ALSA)
+    add_library(ALSA::ALSA UNKNOWN IMPORTED)
+    set_target_properties(ALSA::ALSA PROPERTIES
+                                     IMPORTED_LOCATION "${ALSA_LIBRARY}"
+                                     INTERFACE_COMPILE_DEFINITIONS "${ALSA_DEFINITIONS}")
+  endif()
+endif()
+
+mark_as_advanced(ALSA_INCLUDE_DIR ALSA_LIBRARY)