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-rw-r--r--common.mak2
1 files changed, 1 insertions, 1 deletions
diff --git a/common.mak b/common.mak
index 66297ef5a1..62dddcd5cf 100644
--- a/common.mak
+++ b/common.mak
@@ -4,7 +4,7 @@
all: # make "all" default target
-ifeq ($(SUBDIR),)
+ifndef SUBDIR
vpath %.c $(SRC_DIR)
vpath %.h $(SRC_DIR)
vpath %.S $(SRC_DIR)