H2PH(1) Perl Programmers Reference Guide H2PH(1)

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

SYNOPSIS
       hh22pphh [[-dd ddeessttiinnaattiioonn ddiirreeccttoorryy]] [[-rr || -aa]] [[-ll]] [[hheeaaddeerrffiilleess]]

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 -dd switch.

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

OOPPTTIIOONNSS
       -d destinationdir
           Put the resulting ..pphh files beneath ddeessttiinnaattiioonnddiirr, instead of
           beneath the default Perl library location ($Config{'installsit-
           search'}).

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

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

       -l  Symbolic links will be replicated in the destination directory.  If
           -ll 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 rreeqquuiirree a ..pphh 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 ..pphh files almost double in size when built using -hh.

       -D  Include the code from the ..hh file as a comment in the ..pphh 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 {
               FIRSTVALUE,
               SECONDVALUE,
           #ifdef ABC
               THIRDVALUE
           #endif
           };

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



perl v5.8.6                       2009-01-12                           H2PH(1)