rules: sync with Entware-ng, 2017.04

rules.mk

@@ -29,7 +29,7 @@ empty:=
 space:= $(empty) $(empty)
 comma:=,
 merge=$(subst $(space),,$(1))
-confvar=$(call merge,$(foreach v,$(1),$(if $($(v)),y,n)))
+confvar=$(shell echo '$(foreach v,$(1),$(v)=$(subst ','\'',$($(v))))' | $(STAGING_DIR_HOST)/bin/mkhash md5)
 strip_last=$(patsubst %.$(lastword $(subst .,$(space),$(1))),%,$(1))
 
 paren_left = (
@@ -101,7 +101,7 @@ ifdef CONFIG_MIPS64_ABI
   endif
 endif
 
-DEFAULT_SUBDIR_TARGETS:=clean download prepare compile install update refresh prereq dist distcheck configure check check-depends
+DEFAULT_SUBDIR_TARGETS:=clean download prepare compile update refresh prereq dist distcheck configure check check-depends
 
 define DefaultTargets
 $(foreach t,$(DEFAULT_SUBDIR_TARGETS) $(1),
@@ -117,6 +117,7 @@ BIN_DIR:=$(OUTPUT_DIR)/targets/$(BOARD)/$(SUBTARGET)
 INCLUDE_DIR:=$(TOPDIR)/include
 SCRIPT_DIR:=$(TOPDIR)/scripts
 BUILD_DIR_BASE:=$(TOPDIR)/build_dir
+# Entware keeps LIBCV (LIBC version) as a suffix in directory names! Lede has removed it....
 ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
   GCCV:=$(call qstrip,$(CONFIG_GCC_VERSION))
   LIBC:=$(call qstrip,$(CONFIG_LIBC))
@@ -140,7 +141,7 @@ else
 endif
 
 #ifeq ($(or $(CONFIG_EXTERNAL_TOOLCHAIN),$(CONFIG_GCC_VERSION_4_8),$(CONFIG_TARGET_uml)),)
-#  iremap = -iremap $(1):$(2)
+#  iremap = -iremap$(1):$(2)
 #endif
 
 PACKAGE_DIR:=$(BIN_DIR)/packages