From ed72803858ac2f3711dff0ea5555aa89bfb9c001 Mon Sep 17 00:00:00 2001
From: Andrey Mironov <diehertz@gmail.com>
Date: Tue, 22 May 2018 11:11:42 +0300
Subject: [PATCH] Added FAST_RAM usage correctness check

---
 .travis.sh |  1 +
 Makefile   | 15 +++++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/.travis.sh b/.travis.sh
index 1be2465df8c..7e5d7808315 100755
--- a/.travis.sh
+++ b/.travis.sh
@@ -68,6 +68,7 @@ elif [ $TARGET ] ; then
 elif [ $GOAL ] ; then
     if [ "test" == "$GOAL" ] ; then
         $MAKE check-target-independence || exit $?
+        $MAKE check-fastram-usage-correctness || exit $?
     fi
 
     $MAKE $GOAL || exit $?
diff --git a/Makefile b/Makefile
index d939fb3db31..80595b78dc3 100644
--- a/Makefile
+++ b/Makefile
@@ -485,6 +485,21 @@ check-target-independence:
 		fi; \
 	done
 
+check-fastram-usage-correctness:
+	$(V1) NON_TRIVIALLY_INITIALIZED=$$(grep -Ern "\W?FAST_RAM_ZERO_INIT\W.*=.*" src/main/ | grep -Ev "=\s*(false|NULL|0(\.0*f?)?)\s*[,;]"); \
+	if [ "$${NON_TRIVIALLY_INITIALIZED}" != "" ]; then \
+		echo "Non-trivially initialized FAST_RAM_ZERO_INIT variables found, use FAST_RAM instead:"; \
+		echo "$${NON_TRIVIALLY_INITIALIZED}"; \
+		exit 1; \
+	fi; \
+	TRIVIALLY_INITIALIZED=$$(grep -Ern "\W?FAST_RAM\W.*;" src/main/ | grep -v "="); \
+	EXPLICITLY_TRIVIALLY_INITIALIZED=$$(grep -Ern "\W?FAST_RAM\W.*;" src/main/ | grep -E "=\s*(false|NULL|0(\.0*f?)?)\s*[,;]"); \
+	if [ "$${TRIVIALLY_INITIALIZED}$${EXPLICITLY_TRIVIALLY_INITIALIZED}" != "" ]; then \
+		echo "Trivially initialized FAST_RAM variables found, use FAST_RAM_ZERO_INIT instead to save FLASH:"; \
+		echo "$${TRIVIALLY_INITIALIZED}\n$${EXPLICITLY_TRIVIALLY_INITIALIZED}"; \
+		exit 1; \
+	fi;
+
 # rebuild everything when makefile changes
 $(TARGET_OBJS) : Makefile