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-rw-r--r--top/maint.mk6
1 files changed, 6 insertions, 0 deletions
diff --git a/top/maint.mk b/top/maint.mk
index 4b574103a3..4e37efeb56 100644
--- a/top/maint.mk
+++ b/top/maint.mk
@@ -21,6 +21,12 @@
# ME := $(word $(words $(MAKEFILE_LIST)),$(MAKEFILE_LIST))
ME := maint.mk
+# These variables ought to be defined through the configure.ac section
+# of the module description. But some packages import this file directly,
+# ignoring the module description.
+GREP ?= grep
+SED ?= sed
+
# Helper variables.
_empty =
_sp = $(_empty) $(_empty)