h2ph(1)

NAME

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

SYNOPSIS

   h2ph [-d destination directory] [-r | -a] [-l] [-h] [-e] [-D] [-Q]
   [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
   architecture dependent library directory.  You can specify a different
   hierarchy 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{'installsitearch'}).

   -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.

   -e  If an error is encountered during conversion, output file will be
       removed and a warning emitted instead of terminating the conversion
       immediately.

   -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
       converted.

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
   definitions 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.

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