enforce gnu make >= 3.81 now. it has become too annoying to work around bugs in 3.80

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@9654 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/include/prereq-build.mk b/include/prereq-build.mk
index 1e448d393f699f121ee3cb21ffc55a835adb8b93..11ee111ced333dcc6286e9df3089c66a9ad8cb96 100644 (file)
--- a/include/prereq-build.mk
+++ b/include/prereq-build.mk
@@ -20,11 +20,7 @@ $(eval $(call Require,non-root, \
 
 # Required for the toolchain
 define Require/working-make
-       echo 'all: test' > $(TMP_DIR)/check.mk
-       echo 'e0 = $$$$(foreach s,foobar,$$$$(eval $$$$s:))' >> $(TMP_DIR)/check.mk
-       echo 'e1 = $$$$(foreach s,foobar, $$$$(eval $$$$s:))' >> $(TMP_DIR)/check.mk
-       echo 'test: $$$$(strip $$$$(e0)) $$$$(strip $$$$(e1))' >> $(TMP_DIR)/check.mk
-       $(NO_TRACE_MAKE) -f $(TMP_DIR)/check.mk
+       $(MAKE) -v | awk '($$$$1 == "GNU") && ($$$$2 = "Make") && ($$$$3 >= "3.81") { print "ok" }' | grep ok > /dev/null
 endef
 
 $(eval $(call Require,working-make, \