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.

       --keep=<glob>: tells iwyu to always keep these includes.

              This flag may be specified multiple times to specify multiple glob patterns.

       --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.

       --no_fwd_decls: do not use forward declarations.

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

       --quoted_includes_first: when sorting includes, place quoted

              ones first.

       --cxx17ns: suggests the more concise syntax introduced in C++17

       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.