UNIFDEF(1) UNIFDEF(1)
NAME
unifdef - remove ifdef'ed lines from C code
SYNOPSIS
unifdef [ -D name ][ -U name ][ -D name ][ -U name ][ -iD
name ][ -iU name ][ -clt ][ file ]
DESCRIPTION
Unifdef reads the given file or standard input if not speci-
fied and removes the specified #ifdef, #ifndef, #else, and
#endif lines, simplifying complex C or C++ code. Ifdefs not
specified on the command line are left untouched. Only one
level of ifdef nesting is processed on each pass.
The ifdef and ifndef'ed symbols to be removed may be speci-
fied with -Dname and -Uname respectively;
If the -c flag is specified, then these flags are comple-
mented.
The -l option causes the replaced lines to be replaced with
blank lines instead of deleting them.
If the file does not contain option may be useful to disable
comment and quote parsing.
Unifdef's comment and quote parsing maybe removed by ifdefs.
Such code can be explicitly ignored using the disabled using
-iDname and -iUname in a similar way to the -Dname and
-Uname options above.
DIAGNOSTICS
Inappropriate else or endif.
Premature EOF.
Exit status is 0 if ifdefs where replaced, 1 if no changes
where made, 2 if trouble.
BUGS
Does not deal with ``#if'' lines.
HISTORY
The unifdef command appeared in BSD 4.3 .