From 8b7171966d8589afe7fb802f84204b059602ae3c Mon Sep 17 00:00:00 2001
From: David Phillips <david@yeah.nah.nz>
Date: Mon, 8 Feb 2021 19:18:27 +1300
Subject: Print cross ELF section size on make

---
 Makefile | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/Makefile b/Makefile
index 7b2f59b..7f8886e 100644
--- a/Makefile
+++ b/Makefile
@@ -2,11 +2,14 @@ include config.mk
 
 CC ?= gcc
 AVR_CC ?= avr-gcc
+AVR_SIZE ?= avr-size
 GDB ?= avr-gdb
 OBJCOPY ?= avr-objcopy
 AVRDUDE ?= avrdude
 QEMU ?= qemu-system-avr
 
+REAL_ELF = build/altimeter.elf
+
 # options for native (i.e. unit test)
 UNITY_SRC ?= unity/src
 UNITY_O = $(UNITY_SRC)/unity.o
@@ -29,7 +32,7 @@ SIM_LDFLAGS += $(AVR_COMMON_LDFLAGS) -mmcu=$(SIM_MCU)
 
 $(shell mkdir -p build/{real,sim,native})
 
-all: build/altimeter_sim.elf build/altimeter.hex test
+all: build/altimeter_sim.elf build/altimeter.hex test size
 
 # Run the sim build software in qemu, halted ready for `make gdb` to attach and
 # continue. Note that sim build mocks out some hardware components
@@ -62,6 +65,9 @@ build/altimeter.elf: \
 	build/real/util.o
 	$(AVR_CC) $(AVR_LDFLAGS) -o $@ $^
 
+size:
+	[ -f "$(REAL_ELF)" ] && $(AVR_SIZE) "$(REAL_ELF)"
+
 # ELF for simulator/emu. Note that whever I/O is required, the *_sim.{o,c}
 # versions of each component will provide a mocked interface. This allows for
 # operation in QEMU (see `emu` recipe) without requring SPI, I²C and
@@ -85,7 +91,4 @@ build/native/%.o: %.c
 build/%.hex: build/%.elf
 	$(OBJCOPY) -O ihex -R .eeprom $< $@
 
-build/%.elf:
-	$(AVR_CC) $(AVR_CFLAGS) -o $@ $^
-
-.PHONY: all emu gdb flash clean test
+.PHONY: all emu gdb flash clean test size
-- 
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