mkdepend 3.3.1 question.

[karron at MCIRPS2.MED.NYU.EDU]

     The -s option inserts its sentinel argument in the comment lines which
     delimit dependencies in depfile.  This option is useful for maintaining
     multiple sets of dependencies in a single file.


What does sentinel argument do, and what does the above from the man page
mean ?

dan.
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