--- tools/build/src/tools/gcc.py.orig	2019-04-09 21:36:57.000000000 +0200
+++ tools/build/src/tools/gcc.py	2020-06-30 23:05:12.356653000 +0200
@@ -714,6 +714,9 @@
     elif host_os_name.endswith('BSD'):
         flags('gcc', 'OPTIONS', ['<threading>multi'], ['-pthread'])
         # there is no -lrt on BSD
+    elif host_os_name == 'BSDSUniX':
+        flags('gcc', 'OPTIONS', ['<threading>multi'], ['-pthread'])
+	# just in case...
     elif host_os_name == 'DragonFly':
         flags('gcc', 'OPTIONS', ['<threading>multi'], ['-pthread'])
         # there is no -lrt on BSD - DragonFly is a FreeBSD variant,