From 6c87e4f77e6072ae7e8587d327b2ff80af2c3e6a Mon Sep 17 00:00:00 2001
From: Keith Packard <keithp@keithp.com>
Date: Sat, 21 May 2011 21:06:29 -0700
Subject: [PATCH] src-avr: Check RAM usage for telescience

ATmega32u4 has only 2.5kB of ram, so check the output of the compiler
to make sure it will work.

Signed-off-by: Keith Packard <keithp@keithp.com>
---
 src-avr/check-avr-mem        | 9 +++++++++
 src-avr/telescience/Makefile | 3 +++
 2 files changed, 12 insertions(+)
 create mode 100644 src-avr/check-avr-mem

diff --git a/src-avr/check-avr-mem b/src-avr/check-avr-mem
new file mode 100644
index 00000000..c73edbd1
--- /dev/null
+++ b/src-avr/check-avr-mem
@@ -0,0 +1,9 @@
+#!/bin/sh
+nm "$@" |
+grep ' N _end' |
+awk '{ iram = strtonum("0x" $1) % 0x10000;
+if ( iram > 0xaff) {
+	printf ("%d bytes of ram more than %d available\n", iram, 0xaff);
+	exit(1);
+} else
+	exit(0); }'
diff --git a/src-avr/telescience/Makefile b/src-avr/telescience/Makefile
index b964e1e6..2618ee06 100644
--- a/src-avr/telescience/Makefile
+++ b/src-avr/telescience/Makefile
@@ -77,8 +77,11 @@ quiet ?= $($1)
 
 all: $(PROG)
 
+CHECK=sh ../check-avr-mem
+
 $(PROG): Makefile $(OBJ)
 	$(call quiet,CC) $(LDFLAGS) $(CFLAGS) -o $(PROG) $(OBJ)
+	$(call quiet,CHECK) $(PROG) || ($(RM) -f $(PROG); exit 1)
 
 $(PROG).hex: $(PROG)
 	avr-size $(PROG)
-- 
2.47.2