make sure there are no duplicate object files linked when building syspatches

diff --git a/share/mk/bsd.lib.mk b/share/mk/bsd.lib.mk
index 3d6ea9d..c4c5856 100644 (file)
--- a/share/mk/bsd.lib.mk
+++ b/share/mk/bsd.lib.mk
@@ -1,4 +1,4 @@
-#      $OpenBSD: bsd.lib.mk,v 1.82 2017/06/05 09:51:27 robert Exp $
+#      $OpenBSD: bsd.lib.mk,v 1.83 2017/06/07 16:01:07 robert Exp $
 #      $NetBSD: bsd.lib.mk,v 1.67 1996/01/17 20:39:26 mycroft Exp $
 #      @(#)bsd.lib.mk  5.26 (Berkeley) 5/2/91
 
@@ -186,7 +186,7 @@ ${FULLSHLIBNAME}: ${SOBJS} ${DPADD}
 .if defined(SYSPATCH)
        ${CC} -shared ${PICFLAG} -o ${.TARGET} \
            `readelf -Ws ${LIBDIR}/${.TARGET} | awk '/ FILE/{gsub(/\..*/, ".so", $$NF); sub(".*/", "", $$NF); print $$NF}' | \
-           egrep -v "(cmll-586|libgcc2|unwind-dw2)"` ${LDADD}
+           egrep -v "(cmll-586|libgcc2|unwind-dw2)" | awk '!x[$$0]++'` ${LDADD}
 .else
        ${CC} -shared ${PICFLAG} -o ${.TARGET} \
            `echo ${SOBJS} | tr ' ' '\n' | sort -R` ${LDADD}