Index: gcc/config/freebsd-spec.h
===================================================================
--- gcc/config/freebsd-spec.h	(revision 158719)
+++ gcc/config/freebsd-spec.h	(working copy)
@@ -139,7 +139,8 @@
   %{!shared:								\
     %{!pg: %{pthread:-lpthread} -lc}					\
     %{pg:  %{pthread:-lpthread_p} -lc_p}				\
-  }"
+  }                                                                     \
+  %{shared: %{pthread:-lpthread} -lc}"
 #endif
 #endif