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-rw-r--r--src/stm/Makefile.defs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/stm/Makefile.defs b/src/stm/Makefile.defs
index d0e5a699..1e31e590 100644
--- a/src/stm/Makefile.defs
+++ b/src/stm/Makefile.defs
@@ -24,7 +24,7 @@ include $(TOPDIR)/Makedefs
CC=$(ARM_CC)
LIBS=$(PDCLIB_LIBS_M3) -lgcc
-WARN_FLAGS=-Wall
+WARN_FLAGS=-Wall -Wextra
AO_CFLAGS=-I. -I../stm -I../core -I../drivers -I../math -I.. $(PDCLIB_INCLUDES)
STM_CFLAGS=-std=gnu99 -mlittle-endian -mcpu=cortex-m3 -mthumb \