NAME
    h2ph - convert .h C header files to .ph Perl header files

SYNOPSIS
    h2ph [-d destination directory] [-r | -a] [-l] [headerfiles]

DESCRIPTION
    h2ph converts any C header files specified to the corresponding Perl
    header file format. It is most easily run while in /usr/include:

     cd /usr/include; h2ph * sys/*

    or

     cd /usr/include; h2ph * sys/* arpa/* netinet/*

    or

     cd /usr/include; h2ph -r -l .

    The output files are placed in the hierarchy rooted at Perl's architec-
    ture dependent library directory. You can specify a different hierar-
    chy with a -d switch.

    If run with no arguments, filters standard input to standard output.

OPTIONS
    -d destination_dir
   Put the resulting .ph files beneath destination_dir, instead of
   beneath the default Perl library location ($Config{'installsit-
   search'}).

    -r Run recursively; if any of headerfiles are directories, then run
   h2ph on all files in those directories (and their subdirectories,
   etc.). -r and -a are mutually exclusive.

    -a Run automagically; convert headerfiles, as well as any .h files
   which they include. This option will search for .h files in all
   directories which your C compiler ordinarily uses. -a and -r are
   mutually exclusive.

    -l Symbolic links will be replicated in the destination directory. If
   -l is not specified, then links are skipped over.

    -h Put ``hints'' in the .ph files which will help in locating problems
   with h2ph. In those cases when you require a .ph file containing
   syntax errors, instead of the cryptic

    [ some error condition ] at (eval mmm) line nnn

   you will see the slightly more helpful

    [ some error condition ] at filename.ph line nnn

   However, the .ph files almost double in size when built using -h.

    -D Include the code from the .h file as a comment in the .ph file.
   This is primarily used for debugging h2ph.

    -Q ``Quiet'' mode; don't print out the names of the files being con-
   verted.

ENVIRONMENT
    No environment variables are used.

FILES
 /usr/include/*.h
 /usr/include/sys/*.h

    etc.

AUTHOR
    Larry Wall

SEE ALSO
   perl(1)

DIAGNOSTICS
    The usual warnings if it can't read or write the files involved.

BUGS
    Doesn't construct the %sizeof array for you.

    It doesn't handle all C constructs, but it does attempt to isolate def-
    initions inside evals so that you can get at the definitions that it
    can translate.

    It's only intended as a rough tool. You may need to dicker with the
    files produced.

    You have to run this program by hand; it's not run as part of the Perl
    installation.

    Doesn't handle complicated expressions built piecemeal, a la:

   enum {
     FIRST_VALUE,
     SECOND_VALUE,
   #ifdef ABC
     THIRD_VALUE
   #endif
   };

    Doesn't necessarily locate all of your C compiler's internally-defined
    symbols.