diff -Naur ilmbase-1.0.0/m4/threads.m4 ilmbase-1.0.0.tpg/m4/threads.m4
--- ilmbase-1.0.0/m4/threads.m4	2006-12-13 22:51:56.000000000 +0000
+++ ilmbase-1.0.0.tpg/m4/threads.m4	2007-10-21 15:26:47.000000000 +0000
@@ -87,7 +87,7 @@
 # which indicates that we try without any flags at all, and "pthread-config"
 # which is a program returning the flags for the Pth emulation library.
 
-acx_pthread_flags="pthreads none -Kthread -kthread lthread -pthread -pthreads -mthreads pthread --thread-safe -mt pthread-config"
+acx_pthread_flags="pthreads none -Kthread -kthread lthread pthread -pthread -pthreads -mthreads --thread-safe -mt pthread-config"
 
 # The ordering *is* (sometimes) important.  Some notes on the
 # individual items follow: