[buildroot] Implement an ARCH_PACKAGES variable which defaults to BOARD but can be overridden on a per-subtarget basis.

This is intended for targets such as adm5120 and malta which support both big and little endianess and will replace
the target specific exceptions in package-defaults and Image Builder.


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@23029 3c298f89-4303-0410-b956-a3cf2f4a3e73

include/package-defaults.mk

@@ -23,10 +23,10 @@ define Package/Default
   else
     VERSION:=$(PKG_RELEASE)
   endif
-  ifneq ($(CONFIG_TARGET_adm5120),y)
-    PKGARCH:=$(BOARD)
+  ifneq ($(ARCH_PACKAGES),)
+    PKGARCH:=$(ARCH_PACKAGES)
   else
-    PKGARCH:=$(BOARD)_$(ARCH)
+    PKGARCH:=$(BOARD)
   endif
   PRIORITY:=optional
   DEFAULT:=

include/target.mk

@@ -178,6 +178,7 @@ define BuildTargets/DumpCurrent
 	 echo 'Target-Name: $(BOARDNAME)$(if $(SUBTARGETS),$(if $(SUBTARGET),))'; \
 	 echo 'Target-Path: $(subst $(TOPDIR)/,,$(PWD))'; \
 	 echo 'Target-Arch: $(ARCH)'; \
+	 echo 'Target-Arch-Packages: $(if $(ARCH_PACKAGES),$(ARCH_PACKAGES),$(BOARD))'; \
 	 echo 'Target-Features: $(FEATURES)'; \
 	 echo 'Target-Depends: $(DEPENDS)'; \
 	 echo 'Target-Optimization: $(if $(CFLAGS),$(CFLAGS),$(DEFAULT_CFLAGS))'; \