+# all-emacs
+# all-cygnus - set up install directories, build 3stage native and all
+# supported cross targets, then check 3stage'd native
+# (rt = $(canonhost)-stamp-3stage-done, do-cygnus for cross)
+# native - set up install directories, build 3stage native
+# (rt = $(canonhost)-stamp-3stage-1)
+# build-cygnus - build 3stage native and all supported cross targets
+# (rt = $(canonhost)-stamp-3stage-done, build-cygnus for cross)
+# build-latest - build native and all supported cross targets
+# (rt = build-latest)
+# all-native - set up install directories, build native
+# (rt = do-native)
+# all-cross - set up install directories, build all targets
+# (rt = do-cygnus)
+# config - configure native and all supported cross targets
+# (rt = do1-config, do-native-config for cross)
+# build - build native and all supported cross targets
+# (rt = do1-build, build-native for cross)
+# 3build - build 3stage native and all supported cross targets
+# (rt = all, build-cygnus for cross)
+# build-all-latest - build 3stage native and all supported cross targets
+# (rt = $(canonhost)-stamp-3stage-done, build-latest for cross)
+# clean - remove objdir directories, stamp files
+# (rt = clean)
+#
+# To configure/build for fewer targets, specify TARGETS="native cross1 ...".
+