Invoke make as $(MAKE) from within makefiles

Our makefiles require gnumake.  Under some unices, gnumake is
installed as gmake, with plain "make" referring to a something less
featureful.  So it's necessary to invoke make as $(MAKE) from within
makefiles, in order to make sure we invoke the same variant.

1 files changed, 1 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 125ebc711b..080324f270 100644
--- a/Makefile
+++ b/Makefile
@@ -151,7 +151,7 @@ srcdist: distclean
 	rm -rf $(TARGET_SRC_DIR)
 
 distclean: clean
-	make -C $(AMQP_CODEGEN_DIR) distclean
+	$(MAKE) -C $(AMQP_CODEGEN_DIR) distclean
 	rm -rf dist
 	find . -regex '.*\(~\|#\|\.swp\|\.dump\)' -exec rm {} \;