f flags located
after a sequence of filenames is processed only if the current
executable's name matches one of the filenames.  It is possible to
start the flagfile with a sequence of flags instead of a sequence of
filenames; if such a sequence of flags is present, these flags are
applied to the current executable no matter what it is.</p>

<p>Lines that start with a <code>#</code> are ignored as comments.
Leading whitespace is also ignored in flagfiles, as are blank
lines.</p>

<p>It is possible for a flag