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-rw-r--r--software/demo_gpio/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/software/demo_gpio/Makefile b/software/demo_gpio/Makefile
index 0a0b148..04a11b7 100644
--- a/software/demo_gpio/Makefile
+++ b/software/demo_gpio/Makefile
@@ -1,7 +1,7 @@
TARGET = demo_gpio
C_SRCS += demo_gpio.c
C_SRCS += plic_driver.c
-CFLAGS += -fno-builtin-printf -DUSE_PLIC -DUSE_M_TIME
+CFLAGS += -O2 -fno-builtin-printf -DUSE_PLIC -DUSE_M_TIME
BSP_BASE = ../../bsp
include $(BSP_BASE)/env/common.mk