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-rw-r--r--config.mk.in3
1 files changed, 2 insertions, 1 deletions
diff --git a/config.mk.in b/config.mk.in
index 4f19139e75..5033d634cb 100644
--- a/config.mk.in
+++ b/config.mk.in
@@ -23,7 +23,8 @@
ifeq ($(topsrcdir),)
-MAKEFLAGS += --no-builtin-rules --no-builtin-variables --warn-undefined-variables
+MAKEFLAGS += --warn-undefined-variables
+include $(topsrcdir)/build-aux/no-builtin-variables.mk
.LIBPATTERNS = lib%.so lib%.a
topoutdir := $(patsubst %/,%,$(dir $(lastword $(MAKEFILE_LIST))))