$NetBSD: patch-CMakeLists.txt,v 1.4 2020/10/06 00:26:51 mrg Exp $

Add NetBSD support.

--- CMakeLists.txt.orig	2020-08-13 18:03:03.000000000 -0500
+++ CMakeLists.txt	2020-10-05 17:46:13.721846309 -0500
@@ -133,6 +133,12 @@
     set(OSX_VERSION " ")
 endif()
 
+if(CMAKE_SYSTEM_NAME MATCHES "NetBSD")
+    set(NETBSD YES)
+else()
+    set(NETBSD NO)
+endif()
+
 ## USER OPTIONS ##
 # Optional targets, they should all default to ON (check_deps will disable them if not possible to build)
 option(USE_DOUBLE "Set to use double-precision floating point for audio samples." ON)
@@ -1233,7 +1243,9 @@
       list(APPEND libcsound_LIBS ${LIBRT_LIBRARY})
       message(STATUS "  ADDING LIBRT LIBRARY: ${LIBRT_LIBRARY}.")
     endif()
+endif()
 
+if(LINUX OR NETBSD)
     find_library(LIBEXECINFO_LIBRARY execinfo)
 
     if(LIBEXECINFO_LIBRARY)