initial buildroot for linux 5.15

package/skeleton/Config.in

@@ -0,0 +1,9 @@
+config BR2_PACKAGE_SKELETON
+	bool
+	default y
+
+config BR2_PACKAGE_HAS_SKELETON
+	bool
+
+config BR2_PACKAGE_PROVIDES_SKELETON
+	string

package/skeleton/skeleton.mk

@@ -0,0 +1,27 @@
+################################################################################
+#
+# skeleton
+#
+################################################################################
+
+# The skeleton can't depend on the toolchain, since all packages depends on the
+# skeleton and the toolchain is a target package, as is skeleton.
+# Hence, skeleton would depends on the toolchain and the toolchain would depend
+# on skeleton.
+SKELETON_ADD_TOOLCHAIN_DEPENDENCY = NO
+SKELETON_ADD_SKELETON_DEPENDENCY = NO
+
+# We create a compatibility symlink in case a post-build script still
+# uses $(HOST_DIR)/usr
+define HOST_SKELETON_INSTALL_CMDS
+	$(Q)ln -snf . $(HOST_DIR)/usr
+	$(Q)mkdir -p $(HOST_DIR)/lib
+	$(Q)mkdir -p $(HOST_DIR)/include
+	$(Q)case $(HOSTARCH) in \
+		(*64) ln -snf lib $(HOST_DIR)/lib64;; \
+		(*)   ln -snf lib $(HOST_DIR)/lib32;; \
+	esac
+endef
+
+$(eval $(virtual-package))
+$(eval $(host-generic-package))