diff -urN libpst-0.6.45/configure.in libpst-0.6.45.new//configure.in
--- libpst-0.6.45/configure.in	2009-12-11 17:46:02.000000000 +0100
+++ libpst-0.6.45.new//configure.in	2010-02-25 21:54:45.915342007 +0100
@@ -136,7 +136,7 @@
 AC_HEADER_DIRENT
 AC_HEADER_STDC
 AC_CHECK_HEADERS([ctype.h dirent.h errno.h fcntl.h inttypes.h limits.h regex.h semaphore.h signal.h stdarg.h stdint.h stdio.h stdlib.h string.h sys/param.h sys/shm.h sys/stat.h sys/types.h time.h unistd.h wchar.h])
-AC_SEARCH_LIBS([sem_init],rt)
+AC_SEARCH_LIBS([sem_init], [pthread pthreads thread threads])
 
 
 # Checks for typedefs, structures, and compiler characteristics.