unifdef(1)             (BSD Compatibility Package )              unifdef(1)


   NAME
         unifdef - resolve and remove ifdef'ed lines from C program source

   SYNOPSIS
         /usr/ucb/unifdef [ -clt ] [ -Dname ] [ -Uname ] [ -iDname ] [ -iUname
         ] ... [ filename ]

   DESCRIPTION
         unifdef removes ifdefed lines from a file while otherwise leaving the
         file alone.  It is smart enough to deal with the nested ifdefs,
         comments, single and double quotes of C syntax, but it does not do
         any including or interpretation of macros.  Neither does it strip out
         comments, though it recognizes and ignores them.  You specify which
         symbols you want defined with -D options, and which you want
         undefined with -U options.  Lines within those ifdefs will be copied
         to the output, or removed, as appropriate.  Any ifdef, ifndef, else,
         and endif lines associated with filename will also be removed.

         ifdefs involving symbols you do not specify are untouched and copied
         out along with their associated ifdef, else, and endif lines.

         If an ifdefX occurs nested inside another ifdefX, then the inside
         ifdef is treated as if it were an unrecognized symbol.  If the same
         symbol appears in more than one argument, only the first occurrence
         is significant.

         unifdef copies its output to the standard output and will take its
         input from the standard input if no filename argument is given.

         The following options are available:

         -c        Complement the normal operation.  Lines that would have
                   been removed or blanked are retained, and vice versa.

         -l        Replace ``lines removed'' lines with blank lines.

         -t        Plain text option.  unifdef refrains from attempting to
                   recognize comments and single and double quotes.

         -iDname   Ignore, but print out, lines associated with the defined
                   symbol name.  If you use ifdefs to delimit non-C lines,
                   such as comments or code which is under construction, then
                   you must tell unifdef which symbols are used for that
                   purpose so that it will not try to parse for quotes and
                   comments within them.

         -iUname   Ignore, but print out, lines associated with the undefined
                   symbol name.





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   unifdef(1)             (BSD Compatibility Package )              unifdef(1)


   SEE ALSO
         cc(1), cc(1), diff(1).

   DIAGNOSTICS
         Premature EOF       Inappropriate else or endif.

         Exit status is 0 if output is exact copy of input, 1 if not, 2 if
         unifdef encounters problems.













































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