https://github.com/thestk/stk/commit/b3439132339fc0fc649b8e305d7872e60b9520bf

From b3439132339fc0fc649b8e305d7872e60b9520bf Mon Sep 17 00:00:00 2001
From: Tristan Matthews <tmatth@videolan.org>
Date: Wed, 9 Feb 2022 17:20:26 -0500
Subject: [PATCH] configure: fix build for --with-pulse

--- a/configure.ac
+++ b/configure.ac
@@ -162,6 +162,14 @@ api="$api -D__UNIX_JACK__"
     AC_MSG_RESULT(using ALSA)
     AC_CHECK_LIB(asound, snd_pcm_open, , AC_MSG_ERROR(ALSA support requires the asound library!))])
 
+    # Look for PulseAudio flag
+    AC_ARG_WITH(pulse, [  --with-pulse = choose PulseAudio support (linux only)])
+    AS_IF([test "x$with_pulse" == "xyes"], [
+    api="$api -D__LINUX_PULSE__"
+    AC_MSG_RESULT(using PulseAudio)
+    AC_CHECK_LIB(pulse, pa_proplist_gets, , AC_MSG_ERROR(PulseAudio support requires the libpulse library!))
+    AC_CHECK_LIB(pulse-simple, pa_simple_new, , AC_MSG_ERROR(PulseAudio support requires the libpulse-simple library!))])
+
     # Look for OSS flag
     AC_ARG_WITH(oss, [  --with-oss = choose OSS API support (unixes only)])
     AS_IF([test "x$with_oss" == "xyes"], [
--- a/include/Stk.h
+++ b/include/Stk.h
@@ -622,7 +622,7 @@ const StkFloat ONE_OVER_128 = 0.0078125;
 #if defined(__WINDOWS_DS__) || defined(__WINDOWS_ASIO__) || defined(__WINDOWS_MM__)
   #define __OS_WINDOWS__
   #define __STK_REALTIME__
-#elif defined(__LINUX_OSS__) || defined(__LINUX_ALSA__) || defined(__UNIX_JACK__)
+#elif defined(__LINUX_OSS__) || defined(__LINUX_ALSA__) || defined(__UNIX_JACK__) || defined(__LINUX_PULSE__)
   #define __OS_LINUX__
   #define __STK_REALTIME__
 #elif defined(__IRIX_AL__)