test -f "$LC" || canttest "Can't find the produced local config"
grep -Fv "/* config file:" $LC | diff -u correct/lincan_config.h - || error "Local config differs"
+stat $LC > stat.log1
+touch config.omk-default
+make
+stat $LC > stat.log2
+diff stat.log1 stat.log2 || error "Generated config changed without without reason"