src/FOLP/Makefile

 EX_FILES = ex/ROOT.ML ex/cla.ML ex/foundn.ML ex/If.ML ex/If.thy ex/int.ML\
 	   ex/intro.ML ex/Nat.ML ex/Nat.thy ex/Prolog.ML ex/Prolog.thy\
 	   ex/prop.ML ex/quant.ML
 
 $(BIN)/FOLP:   $(BIN)/Pure  $(FILES) 
-	case "$(COMP)" in \
+	@case `expr "//$(COMP)" : '[^ ]*/\(.*\)'` in \
 	poly*)	echo 'make_database"$(BIN)/FOLP"; quit();'  \
 			| $(COMP) $(BIN)/Pure;\
 		if [ "$${MAKE_HTML}" = "true" ]; \
 		then echo 'open PolyML; make_html := true; exit_use_dir".";' \
 		       | $(COMP) $(BIN)/FOLP;\

 		       | $(BIN)/Pure;\
 		else echo 'exit_use_dir"."; xML"$(BIN)/FOLP" banner;' \
 		       | $(BIN)/Pure;\
 		fi;;\
 	*)	echo Bad value for ISABELLECOMP: \
-			$(COMP) is not poly or sml;;\
+			\"$(COMP)\" is not poly or sml;;\
 	esac
 
 $(BIN)/Pure:
 	cd ../Pure;  $(MAKE)
 
 test:	ex/ROOT.ML  $(BIN)/FOLP	 $(EX_FILES) 
-	case "$(COMP)" in \
+	@case `expr "//$(COMP)" : '[^ ]*/\(.*\)'` in \
 	poly*)	if [ "$${MAKE_HTML-undefined}" != "undefined" ]; \
 		then echo 'make_html := true; exit_use_dir"ex"; quit();' \
 		       | $(COMP) $(BIN)/FOLP;\
 		else echo 'exit_use_dir"ex"; quit();' | $(COMP) $(BIN)/FOLP;\
 		fi;;\

 		then echo 'make_html := true; exit_use_dir"ex";' \
 		       | $(BIN)/FOLP;\
 		else echo 'exit_use_dir"ex";' | $(BIN)/FOLP;\
 		fi;;\
 	*)	echo Bad value for ISABELLECOMP: \
-			$(COMP) is not poly or sml;;\
+			\"$(COMP)\" is not poly or sml;;\
 	esac
 
 .PRECIOUS:   $(BIN)/Pure  $(BIN)/FOLP