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-rw-r--r--plugins/c_src.mk3
1 files changed, 3 insertions, 0 deletions
diff --git a/plugins/c_src.mk b/plugins/c_src.mk
index 11b1f79..71c0099 100644
--- a/plugins/c_src.mk
+++ b/plugins/c_src.mk
@@ -226,6 +226,9 @@ endif
ifneq ($(wildcard src/$n.erl),)
$(error Error: src/$n.erl already exists)
endif
+ifndef n
+ $(error Usage: $(MAKE) new-nif n=NAME [in=APP])
+endif
ifdef in
$(verbose) $(MAKE) -C $(APPS_DIR)/$(in)/ new-nif n=$n in=
else