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-rw-r--r--testhal/STM32F4xx/USB_CDC/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/testhal/STM32F4xx/USB_CDC/Makefile b/testhal/STM32F4xx/USB_CDC/Makefile
index 1a6ac2d74..233e47d0e 100644
--- a/testhal/STM32F4xx/USB_CDC/Makefile
+++ b/testhal/STM32F4xx/USB_CDC/Makefile
@@ -5,7 +5,7 @@
# Compiler options here.
ifeq ($(USE_OPT),)
- USE_OPT = -O2 -ggdb -fomit-frame-pointer -falign-functions=16
+ USE_OPT = -O0 -ggdb -fomit-frame-pointer -falign-functions=16
endif
# C specific options here (added to USE_OPT).