core: support make 4.00
Make 4.00 is now out, and builds work fine with it.
Change-Id: I49e36d651a7997a52270badb0e8badd975f64e8f
diff --git a/core/main.mk b/core/main.mk
index fec77a2..5b0832b 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -40,17 +40,15 @@
# Check for broken versions of make.
# (Allow any version under Cygwin since we don't actually build the platform there.)
ifeq (,$(findstring CYGWIN,$(shell uname -sm)))
-ifeq (0,$(shell expr $$(echo $(MAKE_VERSION) | sed "s/[^0-9\.].*//") = 3.81))
-ifeq (0,$(shell expr $$(echo $(MAKE_VERSION) | sed "s/[^0-9\.].*//") = 3.82))
+ifneq (1,$(strip $(shell expr $(MAKE_VERSION) \>= 3.81)))
$(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
# Absolute path of the present working direcotry.
# This overrides the shell variable $PWD, which does not necessarily points to