add sndio support

CMakeLists.txt

@@ -143,6 +143,10 @@ elseif(${CMAKE_SYSTEM_NAME} STREQUAL "FreeBSD")
   configure_file("${CMAKE_SOURCE_DIR}/cmake/cpack/${CMAKE_PROJECT_NAME}.desktop.in"
     "${CMAKE_BINARY_DIR}/${CMAKE_PROJECT_NAME}.desktop" @ONLY)
 
+elseif(${CMAKE_SYSTEM_NAME} STREQUAL "OpenBSD")
+  set(OPENBSD TRUE)
+  set(HAVE_SNDIO TRUE)
+
 elseif(APPLE)
   if("${CMAKE_OSX_DEPLOYMENT_TARGET}" STREQUAL "")
     message(STATUS "Build for macOS target: local version")
@@ -276,6 +280,12 @@ if(LINUX)
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DUSE_CM108")
   endif()
 
+elseif (HAVE_SNDIO)
+  find_package(sndio REQUIRED)
+  if(SNDIO_FOUND)
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DUSE_SNDIO")
+  endif()
+
 elseif (NOT WIN32 AND NOT CYGWIN)
   find_package(Portaudio REQUIRED)
   if(PORTAUDIO_FOUND)
@@ -289,6 +299,8 @@ else()
   set(UDEV_LIBRARIES "")
   set(PORTAUDIO_INCLUDE_DIRS "")
   set(PORTAUDIO_LIBRARIES "")
+  set(SNDIO_INCLUDE_DIRS "")
+  set(SNDIO_LIBRARIES "")
 endif()
 
 # manage and fetch new data

cmake/modules/Findsndio.cmake

@@ -0,0 +1,42 @@
+# - Try to find sndio
+#
+#  SNDIO_FOUND - system has sndio
+#  SNDIO_LIBRARIES - location of the library for sndio
+#  SNDIO_INCLUDE_DIRS - location of the include files for sndio
+
+set(SNDIO_ROOT_DIR
+  "${SNDIO_ROOT_DIR}"
+  CACHE
+  PATH
+  "Directory to search for sndio")
+
+# no need to check pkg-config
+
+find_path(SNDIO_INCLUDE_DIRS
+  NAMES
+  sndio.h
+  PATHS
+  /usr/local/include
+  /usr/include
+  /opt/local/include
+  HINTS
+  ${SNDIO_ROOT_DIR}
+  )
+
+find_library(SNDIO_LIBRARIES
+  NAMES
+  sndio
+  PATHS
+  /usr/local/lib
+  /usr/lib
+  /usr/lib64
+  /opt/local/lib
+  HINTS
+  ${SNDIIO_ROOT_DIR}
+  )
+
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(SNDIO DEFAULT_MSG SNDIO_INCLUDE_DIRS SNDIO_LIBRARIES)
+
+mark_as_advanced(SNDIO_INCLUDE_DIRS SNDIO_LIBRARIES)

src/CMakeLists.txt

@@ -7,6 +7,7 @@ include_directories(
   ${ALSA_INCLUDE_DIRS}
   ${UDEV_INCLUDE_DIRS}
   ${PORTAUDIO_INCLUDE_DIRS}
+  ${SNDIO_INCLUDE_DIRS}
   ${CUSTOM_GEOTRANZ_DIR}
   )
 
@@ -107,7 +108,11 @@ if(LINUX)
     list(REMOVE_ITEM direwolf_SOURCES
       dwgpsd.c
       )
-  else() # macOS freebsd openbsd
+  elseif(HAVE_SNDIO)
+    list(APPEND direwolf_SOURCES
+      audio.c
+      )
+  else() # macOS freebsd
     list(APPEND direwolf_SOURCES
       audio_portaudio.c
       )
@@ -127,6 +132,7 @@ target_link_libraries(direwolf
   ${ALSA_LIBRARIES}
   ${UDEV_LIBRARIES}
   ${PORTAUDIO_LIBRARIES}
+  ${SNDIO_LIBRARIES}
   )
 
 if(WIN32 OR CYGWIN)