snc: several Makefile fixes

- fixed a long-standing problem with parallel builds
- work-arounds for various EPICS base versions

src/snc/Makefile

@@ -13,11 +13,8 @@ PROD_HOST += snc
 
 snc_LIBS += $(EPICS_BASE_IOC_LIBS)
 
-#snc_SRCS += snl.re         # lexer spec
-#snc_SRCS += snl.lem        # parser spec
-
-snc_SRCS += lexer.c         # generated by re2c
-snc_SRCS += snl.c           # generated by lemon
+snc_OBJS += lexer.o         # generated by re2c from snl.re
+snc_OBJS += snl.o           # generated by lemon from snl.lem
 
 snc_SRCS += main.c          # main program
 snc_SRCS += expr.c          # generate expressions
@@ -42,29 +39,47 @@ include $(TOP)/configure/RULES
 vpath %.lem ..
 vpath %.lt ..
 
-snl.c: snl.lem snl.lt $(LEMON)
-	$(RM) snl.c snl.h
-	$(LEMON) o=. $<
+# this extra dependency needed for 3.14.8 compatibility
+lexer.o: snl.h
 
-# empty recipy needed to work around make bug #35455
-snl.h: snl.c ;
+snl.c snl.h snl.out: parser_created
+
+parser_created: snl.lem snl.lt $(LEMON)
+	$(LEMON) o=. $<
+	@echo > parser_created
 
 vpath %.re ..
 
+# this ifdef needed for 3.14.8 compatibility
+ifdef T_A
 lexer.c: snl.re
 	$(RE2C) -s -b -o $@ $<
-
-# work around bug in base rules
-lexer$(OBJ): snl.h
+endif
 
 $(COMMON_DIR)/snl.bnf: snl.lem
-	$(RM) $@
-	$(LEMON) o=. -g $< > $@.tmp
-	$(MV) $@.tmp $@
+	$(LEMON) o=. -g $< > $@
 
 $(COMMON_DIR)/bnf.inc: ../bnf2txt.pl snl.re $(COMMON_DIR)/snl.bnf
-	$(RM) $@
 	$(PERL) $^ > $@
 
 $(INSTALL_DOC)/%: $(COMMON_DIR)/%
-	@$(INSTALL) -d -m 644 $< $(INSTALL_DOC)
+	$(INSTALL) -d -m 644 $< $(INSTALL_DOC)
+
+ifdef BASE_3_14
+%$(DEP): %.c
+	@-$(MKMF) $(HDEPENDS_FLAGS) -m $*$(DEP) $(HDEPENDS_INCLUDES) $*$(OBJ) $<
+endif
+
+ifdef BASE_3_15
+CLEANS += lexer.c lexer$(DEP) parser_created snl.c snl$(DEP) snl.h
+else
+ifdef T_A
+clean::
+	@$(RM) lexer.c lexer$(DEP) parser_created snl.c snl$(DEP) snl.h
+endif
+endif
+
+# this ifdef needed for 3.14.8 compatibility
+ifdef T_A
+-include lexer$(DEP) snl$(DEP)
+endif

test/validate/Makefile

@@ -86,6 +86,7 @@ DBD += vxTestHarness.dbd
 vxTestHarness_DBD += base.dbd
 vxTestHarness_DBD += $(COMMON_DIR)/vxTestHarnessRegistrars.dbd
 
+# needed for base 3.14.10 compatibility:
 USR_DBDFLAGS += -I $(COMMON_DIR)
 
 DB += vxTestHarness.db