- --gnulib-snapshot-date=DATE if gnulib is in the bootstrap tool list,
- then report this as the snapshot date.
- If not specified, use the current date/time.
- If you specify a date here, be sure it is UTC.
+ --gnulib-version=VERSION report VERSION as the gnulib version, where
+ VERSION is the result of running git describe
+ in the gnulib source directory.
+ required if gnulib is in TOOL_LIST.