diff -up wrk/mpn/m4-ccas.wrk wrk/mpn/m4-ccas

--- wrk/mpn/m4-ccas.wrk	2015-04-02 16:44:03.645305407 +0200

+++ wrk/mpn/m4-ccas	2015-04-02 16:21:57.893870969 +0200

@@ -104,4 +104,4 @@ echo "$CC"

 $CC || exit

 # Comment this out to preserve .s intermediates

-rm -f $TMP

+#rm -f $TMP

diff -up wrk/mpn/Makeasm.am.wrk wrk/mpn/Makeasm.am

--- wrk/mpn/Makeasm.am.wrk	2015-04-02 16:42:41.692278742 +0200

+++ wrk/mpn/Makeasm.am	2015-04-02 16:21:57.891870945 +0200

@@ -66,7 +66,7 @@ SUFFIXES = .s .S .asm

 # can be overridden during development, eg. "make RM_TMP=: mul_1.lo"

-RM_TMP = rm -f

+RM_TMP = true

 # .S assembler, preprocessed with cpp.