Some cleaning in the Makefile, and 616bytes flash saved, thanks to Michal idea!

src/Makefile

@@ -583,9 +583,7 @@ GENDEPFLAGS = -MD -MP -MF .dep/$(@F).d
 
 # Combine all necessary flags and optional flags.
 # Add target processor to flags.
-ALL_CFLAGS = -mmcu=$(MCU) -I. $(CFLAGS) $(GENDEPFLAGS)
-ALL_CPPFLAGS = -mmcu=$(MCU) -I. -x c++ $(CPPFLAGS) $(GENDEPFLAGS) $(AVRGCCFLAGS)
-ALL_ASFLAGS = -mmcu=$(MCU) -I. -x assembler-with-cpp $(ASFLAGS)
+ALL_CPPFLAGS = -mmcu=$(MCU) -I. -x c++ $(CPPFLAGS) $(GENDEPFLAGS) $(AVRGCCFLAGS) -fwhole-program
 
 MAJ_VER = ${shell sh -c "grep \"MAJ_VERS\" open9x.h | cut -d\  -f3 | egrep -o \"[[:digit:]]\""}
 MIN_VER = ${shell sh -c "grep \"MIN_VERS\" open9x.h | cut -d\  -f3"}
@@ -598,7 +596,6 @@ all: begin gccversion sizebefore build sizeafter end
 
 # Change the build target to build a HEX file or a library.
 build: stamp_header font.lbm font_dblsize.lbm sticks.lbm s9xsplash.lbm elf hex eep lss sym
-#build: lib
 
 
 elf: $(TARGET).elf
@@ -606,9 +603,6 @@ hex: $(TARGET).hex
 eep: $(TARGET).eep
 lss: $(TARGET).lss
 sym: $(TARGET).sym
-LIBNAME=lib$(TARGET).a
-lib: $(LIBNAME)
-
 
 # Build stamp-file
 stamp_header:
@@ -795,61 +789,13 @@ extcoff: $(TARGET).elf
 	@echo $(MSG_SYMBOL_TABLE) $@
 	$(NM) -n $< > $@
 
-
-
-# Create library from object files.
-.SECONDARY : $(TARGET).a
-.PRECIOUS : $(OBJ)
-%.a: $(OBJ)
-	@echo
-	@echo $(MSG_CREATING_LIBRARY) $@
-	$(AR) $@ $(OBJ)
-
-
 # Link: create ELF output file from object files.
-.SECONDARY : $(TARGET).elf
-.PRECIOUS : $(OBJ)
-%.elf: $(OBJ)
+%.elf:
 	@echo
 	@echo $(MSG_LINKING) $@
-	$(CC) $(ALL_CFLAGS) $^ --output $@ $(LDFLAGS)
-
-
-# Compile: create object files from C source files.
-$(OBJDIR)/%.o : %.c
+	cat $(CPPSRC) > allsrc.cpp
 	@echo
-	@echo $(MSG_COMPILING) $<
-	$(CC) -c $(ALL_CFLAGS) $< -o $@
-
-
-# Compile: create object files from C++ source files.
-$(OBJDIR)/%.o : %.cpp
-	@echo
-	@echo $(MSG_COMPILING_CPP) $<
-	$(CC) -c $(ALL_CPPFLAGS) $< -o $@
-
-
-# Compile: create assembler files from C source files.
-%.s : %.c
-	$(CC) -S $(ALL_CFLAGS) $< -o $@
-
-
-# Compile: create assembler files from C++ source files.
-%.s : %.cpp
-	$(CC) -S $(ALL_CPPFLAGS) $< -o $@
-
-
-# Assemble: create object files from assembler source files.
-$(OBJDIR)/%.o : %.S
-	@echo
-	@echo $(MSG_ASSEMBLING) $<
-	$(CC) -c $(ALL_ASFLAGS) $< -o $@
-
-
-# Create preprocessed source for use in sending a bug report.
-%.i : %.c
-	$(CC) -E -mmcu=$(MCU) -I. $(CFLAGS) $< -o $@
-
+	$(CC) $(ALL_CPPFLAGS) allsrc.cpp --output $@ $(LDFLAGS)
 
 # Target: clean project.
 clean: begin clean_list end