Reanabled some compiler warnings
diff --git a/sam3s_example/Makefile b/sam3s_example/Makefile
index f61cb10..ba686cd 100644
--- a/sam3s_example/Makefile
+++ b/sam3s_example/Makefile
@@ -97,23 +97,24 @@
INCLUDES += $(INCLUDES_USB)
#INCLUDES += -I$(LIBRARIES)
-CFLAGS += -Wall -Wchar-subscripts -Wcomment -Wimplicit-int #-Wformat=2
+CFLAGS += -Wall -Wchar-subscripts -Wcomment -Wimplicit-int -Wformat=2
CFLAGS += -Werror-implicit-function-declaration -Wmain -Wparentheses
CFLAGS += -Wsequence-point -Wreturn-type -Wswitch -Wtrigraphs #-Wunused
CFLAGS += -Wuninitialized -Wunknown-pragmas -Wfloat-equal -Wundef
CFLAGS += -Wshadow -Wpointer-arith -Wbad-function-cast -Wwrite-strings
CFLAGS += -Wsign-compare -Waggregate-return
-#CFLAGS += -Wformat
+CFLAGS += -Wformat
CFLAGS += -Wmissing-format-attribute -Wno-deprecated-declarations
-#CFLAGS += -Wpacked
+CFLAGS += #-Wpacked
CFLAGS += -Wredundant-decls -Wnested-externs -Winline #-Wlong-long
CFLAGS += -Wunreachable-code
CFLAGS += -Wcast-align
CFLAGS += -std=c11
+CFLAGS += -Wmissing-noreturn
+#CFLAGS += -Wconversion
# Disable unused variable warnings
CFLAGS += -Wno-unused-but-set-variable -Wno-unused-variable
-#CFLAGS += -Wmissing-noreturn
-#CFLAGS += -Wconversion
+CFLAGS += -Wno-suggest-attribute=noreturn
# To reduce application size use only integer printf function.
#CFLAGS += -Dprintf=iprintf