add back DEVELOPER=1 feature

BSDmakefile

@@ -25,7 +25,7 @@ _subdir: ${_subdir_dep}
 		echo >&2 Error: you must build with “umask 022”, sorry.; \
 		exit 1; \
 	fi
-	cd ${.CURDIR}/${subdir} && TOPDIR=${.CURDIR} \
+	cd ${.CURDIR}/${subdir} && TOPDIR=${.CURDIR} DEVELOPER=1 \
 	    ${GMAKE} VERBOSE=1 ${.MFLAGS} ${_subdir}
 
 .  include "${.CURDIR}/prereq.mk"

GNUmakefile

@@ -22,7 +22,7 @@ _subdir: ${_subdir_dep}
 		echo >&2 Error: you must build with “umask 022”, sorry.; \
 		exit 1; \
 	fi
-	cd ${subdir} && TOPDIR=${TOPDIR} \
+	cd ${subdir} && TOPDIR=${TOPDIR} DEVELOPER=1 \
 	    make VERBOSE=1 ${MAKEFLAGS} ${MAKECMDGOALS}
 
 include prereq.mk

mk/package.mk

@@ -112,7 +112,7 @@ PKGDESC_$(1)=	$(5)
 PKGSECT_$(1)=	$(6)
 IPKG_$(1)=	$(PACKAGE_DIR)/$(2)_$(3)_${CPU_ARCH}.${PKG_SUFFIX}
 IDIR_$(1)=	$(WRKDIR)/fake-${CPU_ARCH}/pkg-$(2)
-ifneq (${ADK_PACKAGE_$(1)},)
+ifneq (${ADK_PACKAGE_$(1)}${DEVELOPER},)
 ALL_IPKGS+=	$$(IPKG_$(1))
 ALL_IDIRS+=	$${IDIR_$(1)}
 ALL_POSTINST+=	$(2)-install