--- CMakeLists.txt.orig	2020-10-09 03:20:26 UTC
+++ CMakeLists.txt
@@ -299,13 +299,17 @@ if(UNIX)
       portaudio/src/hostapi/coreaudio/pa_mac_core_internal.h
       portaudio/src/hostapi/coreaudio/pa_mac_core.c)
     set(portaudio_SRCS ${portaudio_SRCS} ${portaudio_mac_SRCS})
-  else(APPLE)
+  elseif(CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
+    set(portaudio_freebsd_SRCS 
+      portaudio/src/hostapi/oss/pa_unix_oss.c)
+    set(portaudio_SRCS ${portaudio_SRCS} ${portaudio_freebsd_SRCS})
+  else()
     # Linux
     set(portaudio_linux_SRCS 
       portaudio/src/hostapi/alsa/pa_linux_alsa.c
       portaudio/src/hostapi/oss/pa_unix_oss.c)
     set(portaudio_SRCS ${portaudio_SRCS} ${portaudio_linux_SRCS})
-  endif(APPLE)
+  endif()
 else(UNIX)
   #WIN32
   set(portaudio_SRCS ${portaudio_SRCS} 
@@ -343,8 +347,8 @@ if(UNIX)
   target_include_directories(portaudio_static PRIVATE
           PROPERTY INCLUDE_DIRECTORIES
           ${CMAKE_CURRENT_SOURCE_DIR}/portaudio/src/os/unix)
-if(APPLE)
-else(APPLE)
+if(APPLE OR CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
+else(APPLE OR CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
     # Linux
     set(USE_ALSA 1 CACHE BOOL "Use ALSA audio rather than OSS")
     
@@ -355,7 +359,7 @@ else(APPLE)
     endif(USE_ALSA)
     set_target_properties(portaudio_static PROPERTIES COMPILE_FLAGS 
       "-DPA_USE_OSS=1 -DHAVE_LINUX_SOUNDCARD_H ${ALSA_FLAGS}")
-endif(APPLE)
+endif(APPLE OR CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
 else(UNIX)
     # Windows
     set_target_properties(portaudio_static PROPERTIES COMPILE_FLAGS 
@@ -807,7 +811,9 @@ if(UNIX)
     add_definitions("-DPA_USE_COREAUDIO")
     add_definitions("-DCMTSTUFF")
     add_definitions("-Dmacintosh")
-  else(APPLE)
+  elseif(CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
+    set(EXTRA_PA_LIBS pthread m)
+  else()
     # Linux
     set(EXTRA_PA_LIBS asound pthread m)
   endif(APPLE)