$NetBSD: patch-CMakeLists.txt,v 1.1 2022/07/03 16:09:15 nia Exp $

Make ALSA optional. Add Sun Audio support for NetBSD.

--- CMakeLists.txt.orig	2021-12-22 17:40:36.000000000 +0000
+++ CMakeLists.txt
@@ -178,10 +178,12 @@ if(NOT WIN32 AND NOT ANDROID)
         list(APPEND INCLUDE_DIRS "/usr/local/include")
     else()
 
-        pkg_search_module(ALSA REQUIRED alsa)
+        if(BUILD_WITH_ALSA)
+        pkg_search_module(ALSA alsa)
         if (ALSA_FOUND)
             add_definitions(-DHAS_ALSA)
         endif (ALSA_FOUND)
+        endif(BUILD_WITH_ALSA)
 
         if(BUILD_WITH_PULSE)
             pkg_search_module(PULSE libpulse)
@@ -206,6 +208,11 @@ if(NOT WIN32 AND NOT ANDROID)
             link_directories("/usr/local/lib")
             list(APPEND INCLUDE_DIRS "/usr/local/include")
         endif()
+
+        check_include_file("sys/audioio.h" SUN_FOUND)
+        if (SUN_FOUND)
+            add_definitions(-DHAS_SUN)
+        endif (SUN_FOUND)
     endif()
 
     pkg_search_module(SOXR soxr)