From 50e9c6738f891af5e1a79f67d3a2103038c1eabc Mon Sep 17 00:00:00 2001
From: Kevin O'Connor <kevin@koconnor.net>
Date: Sat, 22 Dec 2018 13:05:58 -0500
Subject: [PATCH] scripts: Add a test case for Ubuntu 18.04 compiler error

Attempt to detect a bad build of Klipper and report an error.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
---
 Makefile             |  1 +
 scripts/check-gcc.sh | 18 ++++++++++++++++++
 2 files changed, 19 insertions(+)
 create mode 100755 scripts/check-gcc.sh

diff --git a/Makefile b/Makefile
index 8bdb534d..bf599e69 100644
--- a/Makefile
+++ b/Makefile
@@ -86,6 +86,7 @@ $(OUT)compile_time_request.o: $(patsubst %.c, $(OUT)src/%.o.ctr,$(src-y)) ./scri
 $(OUT)klipper.elf: $(patsubst %.c, $(OUT)src/%.o,$(src-y)) $(OUT)compile_time_request.o
 	@echo "  Linking $@"
 	$(Q)$(CC) $^ $(CFLAGS_klipper.elf) -o $@
+	$(Q)scripts/check-gcc.sh $@ $(OUT)compile_time_request.o
 
 ################ Kconfig rules
 
diff --git a/scripts/check-gcc.sh b/scripts/check-gcc.sh
new file mode 100755
index 00000000..2d89d98f
--- /dev/null
+++ b/scripts/check-gcc.sh
@@ -0,0 +1,18 @@
+#!/bin/sh
+# This script checks for a broken Ubuntu 18.04 arm-none-eabi-gcc compile
+
+f1="$1"
+f2="$2"
+
+s1=`readelf -A "$f1" | grep "Tag_ARM_ISA_use"`
+s2=`readelf -A "$f2" | grep "Tag_ARM_ISA_use"`
+
+if [ "$s1" != "$s2" ]; then
+    echo ""
+    echo "ERROR: The compiler failed to correctly compile Klipper"
+    echo "It will be necessary to upgrade the compiler"
+    echo "See: https://bugs.launchpad.net/ubuntu/+source/newlib/+bug/1767223"
+    echo ""
+    rm -f "$f1"
+    exit 99
+fi