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-rw-r--r--nuttx-configs/px4io-v1/nsh/Make.defs2
1 files changed, 1 insertions, 1 deletions
diff --git a/nuttx-configs/px4io-v1/nsh/Make.defs b/nuttx-configs/px4io-v1/nsh/Make.defs
index c0f4f07f8..0565606f7 100644
--- a/nuttx-configs/px4io-v1/nsh/Make.defs
+++ b/nuttx-configs/px4io-v1/nsh/Make.defs
@@ -54,7 +54,7 @@ NM = $(CROSSDEV)nm
OBJCOPY = $(CROSSDEV)objcopy
OBJDUMP = $(CROSSDEV)objdump
-MAXOPTIMIZATION = -O3
+MAXOPTIMIZATION = -Os
ARCHCPUFLAGS = -mcpu=cortex-m3 \
-mthumb \
-march=armv7-m