build: purge DESCRIPTION

DESCRIPTION field has been deprecated since 2007, yet internal exporting
causes intermittent package build failures due to the deprecation check,
even with packages that don't have that fields set. Replace all
DESCRIPTION exports with alternative variables defined through shexport
and shvar helpers and remove the check.

Fixes: 547b127d ("make kernel module packaging code reusable and use it in madwifi")
Fixes: 7558f028 ("DESCRIPTION:= is obselete, so complain if it is used and use TITLE if no description is set")
Fixes: cc435322 ("build: optimize target metadata dump")
Fixes: d081edf7 ("build: clean up and optimize ipkg control generator code")
Signed-off-by: George Sapkin <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/21668
Signed-off-by: Robert Marko <[email protected]>

include/kernel.mk

@@ -212,7 +212,6 @@ define KernelPackage
     TITLE:=$(TITLE)
     SECTION:=kernel
     CATEGORY:=Kernel modules
-    DESCRIPTION:=$(DESCRIPTION)
     EXTRA_DEPENDS:=kernel (=$(subst -rc,_rc,$(LINUX_VERSION))~$(LINUX_VERMAGIC)-r$(LINUX_RELEASE))
     VERSION:=$(subst -rc,_rc,$(LINUX_VERSION))$(if $(PKG_VERSION),.$(PKG_VERSION))-r$(if $(PKG_RELEASE),$(PKG_RELEASE),$(LINUX_RELEASE))
     PKGFLAGS:=$(PKGFLAGS)

include/package-pack.mk

@@ -435,7 +435,7 @@ Installed-Size: 0
 $(_endef)
 
     $$(PACK_$(1)) : export CONTROL=$$(Package/$(1)/CONTROL)
-    $$(PACK_$(1)) : export DESCRIPTION=$$(Package/$(1)/description)
+    $$(PACK_$(1)) : $(call shexport,Package/$(1)/description)
     $$(PACK_$(1)) : export PATH=$$(TARGET_PATH_PKG)
     $$(PACK_$(1)) : export PKG_SOURCE_DATE_EPOCH:=$(PKG_SOURCE_DATE_EPOCH)
     $$(PACK_$(1)) : export SOURCE_DATE_EPOCH:=$(PKG_SOURCE_DATE_EPOCH)
@@ -493,7 +493,7 @@ ifeq ($(CONFIG_USE_APK),)
 	(cd $$(IDIR_$(1))/CONTROL; \
 		( \
 			echo "$$$$CONTROL"; \
-			printf "Description: "; echo "$$$$DESCRIPTION" | sed -e 's,^[[:space:]]*, ,g'; \
+			printf "Description: "; echo "$$$$$(call shvar,Package/$(1)/description)" | sed -e 's,^[[:space:]]*, ,g'; \
 		) > control; \
 		chmod 644 control; \
 		( \

include/package.mk

@@ -339,10 +339,6 @@ define BuildPackage
   # default, so wget-ssl can explicitly provide @wget-any as well.
   $(eval PROVIDES:=$(strip @$(1)-any $(PROVIDES)))
 
-ifdef DESCRIPTION
-$$(error DESCRIPTION:= is obsolete, use Package/PKG_NAME/description)
-endif
-
 ifndef Package/$(1)/description
 define Package/$(1)/description
 	$(TITLE)

include/target.mk

@@ -359,7 +359,7 @@ endif
 
 define BuildTargets/DumpCurrent
   .PHONY: dumpinfo
-  dumpinfo : export DESCRIPTION=$$(Target/Description)
+  dumpinfo: $(call shexport,Target/Description)
   dumpinfo:
 	@echo 'Target: $(TARGETID)'; \
 	 echo 'Target-Board: $(BOARD)'; \
@@ -376,7 +376,7 @@ define BuildTargets/DumpCurrent
 	 echo 'Linux-Kernel-Arch: $(LINUX_KARCH)'; \
 	$(if $(SUBTARGET),,$(if $(DEFAULT_SUBTARGET), echo 'Default-Subtarget: $(DEFAULT_SUBTARGET)'; )) \
 	 echo 'Target-Description:'; \
-	 echo "$$$$DESCRIPTION"; \
+	 echo "$$$$$(call shvar,Target/Description);"; \
 	 echo '@@'; \
 	 $(if $(DEFAULT_PROFILE),echo 'Target-Default-Profile: $(DEFAULT_PROFILE)';) \
 	 echo 'Default-Packages: $(DEFAULT_PACKAGES)'; \