NAME

       include-what-you-use - Analyze #includes in C and C++ source files

DESCRIPTION

       USAGE: include-what-you-use [-Xiwyu --iwyu_opt]... <clang opts> <source file> Here are the
       <iwyu_opts> you can specify (e.g. -Xiwyu --verbose=3):

       --check_also=<glob>: tells iwyu to print iwyu-violation info

              for all files matching the given glob  pattern  (in  addition  to  the  default  of
              reporting  for  the  input .cc file and its associated .h files).  This flag may be
              specified multiple times to specify multiple glob patterns.

       --cwd=<dir>: tells iwyu what the current working directory is.

       --howtodebug[=<filename>]: with no arg, prints instructions on

              how to run iwyu under gdb for the input file, and exits.  With an arg, prints  only
              when input file matches the arg.

       --mapping_file=<filename>: gives iwyu a mapping file.

       --no_default_mappings: do not add iwyu's default mappings.

       --pch_in_code: mark the first include in a translation unit as a

       precompiled header.
              Use --pch_in_code to prevent IWYU from

       removing necessary PCH includes.
              Though Clang forces PCHs

              to be listed as prefix headers, the PCH-in-code pattern can be used with GCC and is
              standard practice on MSVC (e.g. stdafx.h).

       --prefix_header_includes=<value>: tells iwyu what to do with

              in-source includes and  forward  declarations  involving  prefix  headers.   Prefix
              header is a file included via command-line option -include.  If prefix header makes
              include or forward declaration obsolete, presence of such include can be controlled
              with the following values

       add:   new lines are added

       keep:  new lines aren't added, existing are kept intact

              remove: new lines aren't added, existing are removed

              Default value is 'add'.

       --transitive_includes_only: do not suggest that a file add

              foo.h unless foo.h is already visible in the file's transitive includes.

       --max_line_length: maximum line length for includes.

              Note that this only affects comments and alignment thereof, the maximum line length
              can still be exceeded with long file names (default: 80).

       --no_comments: do not add 'why' comments.

       --verbose=<level>: the higher the level, the more output.

       In addition to IWYU-specific options you can specify the following options without  -Xiwyu
       prefix:

       --help: prints this help and exits.

       --version: prints version and exits.