1 files changed, 2 insertions, 0 deletions

diff --git a/Makefile b/Makefile
index 370bd08..dc19372 100644
--- a/Makefile
+++ b/Makefile
@@ -2,6 +2,8 @@ TARGET = demo.bin
 LIBDEPS = FreeRTOS/libFreeRTOS.a arch/libarch.a os/libos.a
 LIBS = -Wl,--start-group -lc $(LIBDEPS) -Wl,--end-group
 
+TARGET_SRCS = extern.c
+
 export ROOTDIR = $(CURDIR)
 
 include common.mk