Merge branch 'ralf/noref' into 'master'

add back the ability to skip reference file checks on some Coq versions

See merge request iris/iris!1011

Makefile.coq.local

@@ -26,8 +26,9 @@ test: $(TESTFILES:.v=.vo)
 .PHONY: test
 
 COQ_TEST=$(COQTOP) $(COQDEBUG) -batch -test-mode
+# These versions of Coq are known to have different output so we don't test them.
 # Need to make this a lazy variable (`=` instead of `:=`) since COQ_VERSION is only set later.
-COQ_MINOR_VERSION=$(shell echo "$(COQ_VERSION)" | grep -E '^[0-9]+\.[0-9]+\b' -o)
+COQ_NOREF=$(shell echo "$(COQ_VERSION)" | egrep "^8\.19\." -q && echo 1)
 
 tests/.coqdeps.d: $(TESTFILES)
 	$(SHOW)'COQDEP TESTFILES'
@@ -43,17 +44,15 @@ tests/.coqdeps.d: $(TESTFILES)
 # - Either compare the result with the reference file, or move it over the reference file.
 # - Cleanup, and mark as done for make.
 $(TESTFILES:.v=.vo): %.vo: %.v $(if $(MAKE_REF),,%.ref) $(NORMALIZER)
-	$(HIDE)if test -f $*".$(COQ_MINOR_VERSION).ref"; then \
-	    REF=$*".$(COQ_MINOR_VERSION).ref"; \
-	  else \
-	    REF=$*".ref"; \
-	  fi && \
-	  echo "COQTEST$(if $(MAKE_REF), [make ref],) $< (ref: $$REF)" && \
+	$(HIDE)REF=$*".ref" && \
+	  echo "COQTEST$(if $(COQ_NOREF), [ref diff ignored],$(if $(MAKE_REF), [make ref],)) $< (ref: $$REF)" && \
 	  TMPFILE="$$(mktemp)" && \
 	  unset OCAMLRUNPARAM && \
 	  $(TIMER) $(COQ_TEST) $(COQFLAGS) $(COQLIBS) -load-vernac-source $< > "$$TMPFILE" && \
 	  sed -f $(NORMALIZER) "$$TMPFILE" > "$$TMPFILE".new && \
 	  mv "$$TMPFILE".new "$$TMPFILE" && \
-	  $(if $(MAKE_REF),mv "$$TMPFILE" "$$REF",diff --strip-trailing-cr -u "$$REF" "$$TMPFILE") && \
+	  $(if $(COQ_NOREF), (diff --strip-trailing-cr -u "$$REF" "$$TMPFILE" || true) , \
+	    $(if $(MAKE_REF),mv "$$TMPFILE" "$$REF",diff --strip-trailing-cr -u "$$REF" "$$TMPFILE") \
+	  ) && \
 	  rm -f "$$TMPFILE" && \
 	  touch $@