From 3bb9dc272d8f56504805d30dfcb3d6902915a3d2 Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Mon, 24 Feb 2020 19:12:17 +0100
Subject: [PATCH] Makefile: MAX_SIZE

---
 mk/bluepill.mk | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/mk/bluepill.mk b/mk/bluepill.mk
index cf034b3..a155801 100644
--- a/mk/bluepill.mk
+++ b/mk/bluepill.mk
@@ -8,6 +8,8 @@
 #	LIB_OBJS		list of library object files
 #	WITH_BOOT_LOADER	define if code origin should be shifted by 8K for boot loader
 #	WITH_DFU_FLASH		flashing uses dfu-util
+#	WITH_SERIAL_FLASH	flashing uses the built-in serial boot-loader
+#	MAX_SIZE		complain if the built firmware exceeds this size
 #
 
 vpath %.c $(ROOT)/lib
@@ -83,6 +85,9 @@ include $(OPENCM3_DIR)/mk/genlink-rules.mk
 %.bin: %.elf
 	@printf "  OBJCOPY $(*).bin\n"
 	$(Q)$(OBJCOPY) -Obinary $(*).elf $(*).bin
+ifdef MAX_SIZE
+	$(Q)if [ $$(stat -c '%s' $(*).bin) -gt $(MAX_SIZE) ] ; then echo >&2 "Output too large!" ; false ; fi
+endif
 
 %.elf: $(OBJS) $(UCW_LDSCRIPT)
 	@printf "  LD      $(*).elf\n"
-- 
2.39.2