Date: Fri, 31 Jul 2015 20:24:24 +0200
   From: Martin Husemann <mar...@duskware.de>

   Index: Makefile
   ===================================================================
   RCS file: /cvsroot/src/tests/lib/libc/sys/Makefile,v
   retrieving revision 1.39
   diff -u -r1.39 Makefile
   --- Makefile 22 Jun 2015 00:05:23 -0000      1.39
   +++ Makefile 31 Jul 2015 18:22:48 -0000
   @@ -38,7 +38,6 @@
   ...
   +t_mprotect: t_mprotect_nopax
   +    ${TOOL_PAXCTL} +M t_mprotect
   +    cp t_mprotect t_mprotect_nopax

No comment on the original issue, but -- in addition to fixing the
obvious order of arguments mistake here -- please write makefile rules
to be robust against interruption:

        cp t_mprotect_nopax t_mprotect.tmp && mv -f t_mprotect.tmp t_mprotect

That way if the power goes out in the middle of cp, your objdir is not
corrupted and make can pick up where it left off.

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