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-rw-r--r--ports/zephyr/Makefile6
1 files changed, 4 insertions, 2 deletions
diff --git a/ports/zephyr/Makefile b/ports/zephyr/Makefile
index ec2bbbcb6..2327cf73c 100644
--- a/ports/zephyr/Makefile
+++ b/ports/zephyr/Makefile
@@ -89,8 +89,10 @@ z_clean:
$(MAKE) -f Makefile.zephyr BOARD=$(BOARD) clean
# This rule is for prj_$(BOARD)_merged.conf, not $(CONF_FILE), which
-# can be overriden
-prj_$(BOARD)_merged.conf: prj_base.conf prj_$(BOARD).conf
+# can be overriden.
+# prj_$(BOARD).conf is optional, that's why it's resolved with $(wildcard)
+# function.
+prj_$(BOARD)_merged.conf: prj_base.conf $(wildcard prj_$(BOARD).conf)
$(PYTHON) makeprj.py prj_base.conf prj_$(BOARD).conf $@
test: