build: initialize variable before use

found with make --warn-undefined-variables PR-URL: #320 Reviewed-By: Rod Vagg <rod@vagg.org>
nodejs · Jan 13, 2015 · 5ea716d · 5ea716d
1 parent 17217c3
commit 5ea716d
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/Makefile b/Makefile
@@ -20,6 +20,7 @@ NODE_G_EXE = iojs_g$(EXEEXT)
 # or set the V environment variable to an empty string.
 V ?= 1
 
+USE_NINJA ?= 0
 ifeq ($(USE_NINJA),1)
 ifneq ($(V),)
 NINJA := $(NINJA) -v