--- lib/tsan/CMakeLists.txt.orig	2017-01-12 12:37:35.000000000 +1100
+++ lib/tsan/CMakeLists.txt	2020-05-14 09:10:58.627445000 +1000
@@ -207,7 +207,8 @@
 # in the base system due to incompatibilities between FreeBSD's and Clang's
 # versions. As a workaround do not use --sysroot=. on FreeBSD until this is
 # addressed.
-if(COMPILER_RT_HAS_SYSROOT_FLAG AND NOT CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
+if(COMPILER_RT_HAS_SYSROOT_FLAG AND NOT CMAKE_SYSTEM_NAME MATCHES "FreeBSD"
+    AND NOT CMAKE_SYSTEM_NAME MATCHES "BSDSUniX")
   file(GLOB _tsan_generic_sources rtl/tsan*)
   file(GLOB _tsan_platform_sources rtl/tsan*posix* rtl/tsan*mac*
                                    rtl/tsan*linux*)
--- lib/tsan/go/buildgo.sh.orig	2016-10-29 07:14:18.000000000 +1100
+++ lib/tsan/go/buildgo.sh	2020-05-26 14:49:12.300575000 +1000
@@ -51,6 +51,21 @@
 		../../sanitizer_common/sanitizer_linux_libcdep.cc
 		../../sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cc
 	"
+elif [ "`uname -a | grep BSDSUniX`" != "" ]; then
+	SUFFIX="bsdsunix_amd64"
+	OSCFLAGS="-fno-strict-aliasing -fPIC -Werror"
+	OSLDFLAGS="-lpthread -fPIC -fpie"
+	SRCS="
+		$SRCS
+		../rtl/tsan_platform_linux.cc
+		../../sanitizer_common/sanitizer_posix.cc
+		../../sanitizer_common/sanitizer_posix_libcdep.cc
+		../../sanitizer_common/sanitizer_procmaps_common.cc
+		../../sanitizer_common/sanitizer_procmaps_bsdsunix.cc
+		../../sanitizer_common/sanitizer_linux.cc
+		../../sanitizer_common/sanitizer_linux_libcdep.cc
+		../../sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cc
+	"
 elif [ "`uname -a | grep FreeBSD`" != "" ]; then
 	SUFFIX="freebsd_amd64"
 	OSCFLAGS="-fno-strict-aliasing -fPIC -Werror"