Don't error out if build/ directory already exists.

5830fae2 · Paul Sokolovsky · eb7bfcb2 · 5830fae2
Commit 5830fae2 authored Jan 04, 2014 by Paul Sokolovsky
--- a/stm/Makefile
+++ b/stm/Makefile
@@ -162,7 +162,7 @@ $(BUILD)/flash.elf: $(OBJ)
 	arm-none-eabi-size $@

 $(BUILD):
-	mkdir $@
+	mkdir -p $@

 $(BUILD)/%.o: %.s
 	$(AS) -o $@ $<