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The general form of an entry in a description file is
target1 [target2 ...] :[:] [dependent1 ...] [; commands] [# ...]
[ \t commands] [# ...]
. . .
Items inside brackets may be omitted and
targets and dependents are strings of letters,
digits, periods, and slashes.
Shell metacharacters such as ``
'' and ``?'' are expanded
when the commands are evaluated.
Commands may appear either after a semicolon on a
dependency line
or on lines beginning with a tab
(denoted above as ``\t'')
immediately following a dependency line.
A command is any string of characters not including
#,
except when
#
is in quotes.