- ln -sf /usr/share/misc/config.guess buildlib/config.guess
-configure: aclocal.m4 configure.in buildlib/config.guess buildlib/config.sub
+else
+ ifeq (file-okay,$(shell test -r /usr/share/misc/config.guess && echo 'file-okay'))
+buildlib/config.guess:
+ ln -sf /usr/share/misc/config.guess buildlib/config.guess
+ else
+buildlib/config.guess: missing-config-files
+ endif
+endif
+
+missing-config-files:
+ @echo "APT needs 'config.guess' and 'config.sub' in buildlib/ for configuration."
+ @echo "On Debian systems these are available in the 'autotools-dev' package."
+ @echo
+ @echo "The latest versions can be acquired from the upstream git repository:"
+ @echo "http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.guess;hb=HEAD"
+ @echo "http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub;hb=HEAD"
+ exit 100
+
+configure: aclocal.m4 configure.ac