Makefile: various consistency matters

Using defined variables ${RM} for common tools
error handling
ensuring default target (is not install)

lisp/Makefile

@@ -11,6 +11,8 @@ SCMSRC    = default.scm box.scm label.scm draw.scm drc.scm \
             stack.scm layout.scm prs.scm help.scm gate.scm \
             sel.scm
 
+all:
+
 include ${MAGICDIR}/defs.mak
 
 INST_SCMSRC = ${SCMSRC:%=$(DESTDIR)${INSTALL_SCMDIR}/%}

oa/Makefile

@@ -27,7 +27,7 @@ DEP_FILES = $(addprefix .deps/,$(SRCS:.c=.P))\
 	tr ' ' '\012' < .deps/$(*F).pp \
 	| sed -e 's/^\\$$//' -e '/^$$/ d' -e '/:$$/ d' -e 's/$$/ :/' \
 	>> .deps/$(*F).P; \
-	rm .deps/$(*F).pp
+	${RM} .deps/$(*F).pp
 
 clean:
 	${RM} *.o

scmos/Makefile

@@ -98,11 +98,11 @@ $(HCIFin):
 $(HCIFout):
 $(SCIFin):
 $(SCIFout):
-	cd cif_template; ${MAKE} clean; ${MAKE};
+	cd cif_template && ${MAKE} clean && ${MAKE}
 
 $(DESTDIR)${INSTALL_SYSDIR}/%: %
 	cp $* $(DESTDIR)${INSTALL_SYSDIR}/$*
 
 clean:;
-	-rm -f *.tech *.tech27
-	cd cif_template && ${MAKE} clean;
+	-$(RM) *.tech *.tech27
+	cd cif_template && ${MAKE} clean