Usage: /usr/bin/autoscan [OPTION]... [SRCDIR]

Examine source files in the directory tree rooted at SRCDIR, or the
current directory if none is given.  Search the source files for
common portability problems, check for incompleteness of
'configure.ac', and create a file 'configure.scan' which is a
preliminary 'configure.ac' for that package.

  -h, --help          print this help, then exit
  -V, --version       print version number, then exit
  -v, --verbose       verbosely report processing
  -d, --debug         don't remove temporary files

Library directories:
  -B, --prepend-include=DIR  prepend directory DIR to search path
  -I, --include=DIR          append directory DIR to search path

Report bugs in the tracker at <https://savannah.gnu.org/projects/autoconf>
or by email to <bug-autoconf@gnu.org>.

The full documentation for Autoconf can be read via 'info autoconf',
or on the Web at <https://www.gnu.org/software/autoconf/manual/>.