Enable building with make 4.x (on Ubuntu 14.10).
diff --git a/core/main.mk b/core/main.mk
index af902c5..7cceb01 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -42,15 +42,17 @@
ifeq (,$(findstring CYGWIN,$(shell uname -sm)))
ifeq (0,$(shell expr $$(echo $(MAKE_VERSION) | sed "s/[^0-9\.].*//") = 3.81))
ifeq (0,$(shell expr $$(echo $(MAKE_VERSION) | sed "s/[^0-9\.].*//") = 3.82))
+ifeq (0,$(shell expr $$(echo $(MAKE_VERSION) | sed "s/[^0-9\.].*//;s/\..*//") = 4))
$(warning ********************************************************************************)
$(warning * You are using version $(MAKE_VERSION) of make.)
-$(warning * Android can only be built by versions 3.81 and 3.82.)
+$(warning * Android can only be built by versions 3.81 and higher.)
$(warning * see https://source.android.com/source/download.html)
$(warning ********************************************************************************)
$(error stopping)
endif
endif
endif
+endif
# Absolute path of the present working direcotry.
# This overrides the shell variable $PWD, which does not necessarily points to
