scc

 1#!/bin/sh
 2
 3trap 'rm -f $tmp1' EXIT
 4trap 'exit $?' HUP INT TERM
 5
 6tmp1=tmp1.$$
 7
 8SHELL=foo \
 9$EXEC scc make -f- SHELL=/bin/sh <<'EOF' > $tmp1 2>&1
10all:
11	@echo $$SHELL
12EOF
13
14diff $tmp1 - <<EOF
15foo
16EOF