diff --git a/cpu/stm32w108/Makefile.stm32w108 b/cpu/stm32w108/Makefile.stm32w108
index 29e2f9c72..dce0b1383 100644
--- a/cpu/stm32w108/Makefile.stm32w108
+++ b/cpu/stm32w108/Makefile.stm32w108
@@ -100,9 +100,13 @@ endif
 
 ifeq ($(STM32W_CPUREV), CC)
   LD-EXT=-stm32w108CC
+  RAM_SIZE = 2*8192
+  FLASH_SIZE = 2*128*1024
  ${warning "using stm32w108CC specific ld file"}
 else ifeq ($(STM32W_CPUREV), xB)
   LD-EXT=-stm32w108xB
+  RAM_SIZE = 8192
+  FLASH_SIZE = 128*1024
  ${warning "using stm32w108xB specific ld file"}
 else
  ${error "Bad STM32W_CPUREV value or no STM32W_CPUREV value specified. Cpu revision should be specified. Please read cpu/stm32w108/README.txt for more details."}
@@ -207,8 +211,6 @@ endif
 
 ### Custom rules
 
-OBJECTDIR = obj_$(TARGET)
-
 ssubst = ${patsubst %.s,%.o,${patsubst %.s79,%.o,$(1)}}
 
 CONTIKI_OBJECTFILES += ${addprefix $(OBJECTDIR)/,${call ssubst, $(STM32W_S)}}
@@ -229,18 +231,21 @@ endif
 
 CUSTOM_RULE_C_TO_OBJECTDIR_O = 1
 $(OBJECTDIR)/%.o: %.c | $(OBJECTDIR)
-	$(CC) $(CFLAGS) $< --dependencies=m $(@:.o=.P) -o $@
+	$(TRACE_CC)
+	$(Q)$(CC) $(CFLAGS) $< --dependencies=m $(@:.o=.P) -o $@
 	@$(SEDCOMMAND); rm -f $(@:.o=.P)
 	@$(FINALIZE_DEPENDENCY)
 
 CUSTOM_RULE_C_TO_CO = 1
 %.co: %.c
-	$(CC) $(CFLAGS) -DAUTOSTART_ENABLE $< -o $@
+	$(TRACE_CC)
+	$(Q)$(CC) $(CFLAGS) -DAUTOSTART_ENABLE $< -o $@
 else #IAR
 
 CUSTOM_RULE_C_TO_CE = 1
 %.ce: %.c
-	$(CC) $(CFLAGS) -fno-merge-constants -fno-function-sections -DAUTOSTART_ENABLE -c $< -o $@
+	$(TRACE_CC)
+	$(Q)$(CC) $(CFLAGS) -fno-merge-constants -fno-function-sections -DAUTOSTART_ENABLE -c $< -o $@
 	$(STRIP) --strip-unneeded -g -x $@
 
 CUSTOM_RULE_LINK = 1
@@ -259,12 +264,14 @@ symbols.c symbols.h:
 endif
 
 %.$(TARGET): %.co $(PROJECT_OBJECTFILES) $(PROJECT_LIBRARIES) contiki-$(TARGET).a $(OBJECTDIR)/symbols.o
-	$(LD) $(LDFLAGS) $(TARGET_STARTFILES) ${filter-out %.a,$^} -Wl,-\( ${filter %.a,$^} $(TARGET_LIBFILES) -Wl,-\) -o $@
+	$(TRACE_LD)
+	$(Q)$(LD) $(LDFLAGS) $(TARGET_STARTFILES) ${filter-out %.a,$^} -Wl,-\( ${filter %.a,$^} $(TARGET_LIBFILES) -Wl,-\) -o $@
 	@echo >> contiki-$(TARGET).map
 	@$(SIZE) $(SIZEFLAGS) $@ >> contiki-$(TARGET).map
 
 #%.$(TARGET): %.co $(PROJECT_OBJECTFILES) $(PROJECT_LIBRARIES) $(CONTIKI_OBJECTFILES)
-#	$(LD) $(LDFLAGS) $(TARGET_STARTFILES) ${filter-out %.a,$^} ${filter %.a,$^} $(TARGET_LIBFILES) -o $@
+#	$(TRACE_LD)
+#	$(Q)$(LD) $(LDFLAGS) $(TARGET_STARTFILES) ${filter-out %.a,$^} ${filter %.a,$^} $(TARGET_LIBFILES) -o $@
 #	@echo "\n" >> contiki-$(TARGET).map
 #	@$(SIZE) $(SIZEFLAGS) $@ >> contiki-$(TARGET).map
 
@@ -283,10 +290,12 @@ stm-motes:
 	@echo $(MOTES)
 
 $(OBJECTDIR)/%.o: %.s79 | $(OBJECTDIR)
-	$(AS) $(ASFLAGS) -o $@ $<
+	$(TRACE_AS)
+	$(Q)$(AS) $(ASFLAGS) -o $@ $<
 
 $(OBJECTDIR)/%.o: %.s | $(OBJECTDIR)
-	$(AS) $(ASFLAGS) -o $@ $<
+	$(TRACE_AS)
+	$(Q)$(AS) $(ASFLAGS) -o $@ $<
 
 %.bin: %.$(TARGET)
 	$(OBJCOPY) $(OBJOPTS) $< $@
@@ -314,9 +323,13 @@ endif
 
 # a target that gives a user-friendly memory profile, taking into account the RAM
 # that is statically occupied by the stack as defined in cpu/stm32w108/gnu.ld
-RAM_SIZE = 2*8192
-FLASH_SIZE = 2*128*1024
 STACK_SIZE = 1280
+ifndef RAM_SIZE
+ ${error no ram size configured}
+endif
+ifndef FLASH_SIZE
+ ${error no flash size configured}
+endif
 %.size: %.$(TARGET)
 	@size -A $< | egrep "data|bss" | awk '{s+=$$2} END {s=s+$(STACK_SIZE); f=$(RAM_SIZE)-s; printf "[RAM]   used %6d, free %6d\n",s,f;}'
 	@size -A $< | egrep "text|isr_vector" | awk '{s+=$$2} END {f=$(FLASH_SIZE)-s; printf "[Flash] used %6d, free %6d\n",s,f;}'