---
 linuxthreads/Makeconfig |    5 +++++
 1 file changed, 5 insertions(+)

--- a/linuxthreads/Makeconfig
+++ b/linuxthreads/Makeconfig
@@ -9,3 +9,8 @@
 bounded-thread-library = $(common-objpfx)linuxthreads/libpthread_b.a
 
 rpath-dirs += linuxthreads
+
+# This makes for ptw-*.? object rules in sysd-rules.
+ptw-CPPFLAGS := -DPTW
+sysd-rules-patterns += ptw-%:%
+