Fixes for Solaris X86.

diff --git a/include/config.h.in b/include/config.h.in
index 9280b9b..dc7b309 100644
--- a/include/config.h.in
+++ b/include/config.h.in
@@ -322,6 +322,9 @@
 /* Define if you have the <sys/ipc.h> header file.  */
 #undef HAVE_SYS_IPC_H
 
+/* Define if you have the <sys/link.h> header file.  */
+#undef HAVE_SYS_LINK_H
+
 /* Define if you have the <sys/lwp.h> header file.  */
 #undef HAVE_SYS_LWP_H