diff -ur orage-4.3.90.2.orig/libical/src/libical/Makefile.in orage-4.3.90.2/libical/src/libical/Makefile.in
--- orage-4.3.90.2.orig/libical/src/libical/Makefile.in	2006-07-12 23:34:32.000000000 +0300
+++ orage-4.3.90.2/libical/src/libical/Makefile.in	2006-07-12 23:41:39.000000000 +0300
@@ -95,7 +95,7 @@
 	$(AM_CFLAGS) $(CFLAGS)
 CCLD = $(CC)
 LINK = $(LIBTOOL) --mode=link --tag=CC $(CCLD) $(AM_CFLAGS) $(CFLAGS) \
-	$(AM_LDFLAGS) $(LDFLAGS) -o $@
+	$(AM_LDFLAGS) $(LDFLAGS) -lpthread -o $@
 SOURCES = $(libical_la_SOURCES)
 DIST_SOURCES = $(libical_la_SOURCES)
 ETAGS = etags