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

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

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

NNAAMMEE #

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

SSYYNNOOPPSSIISS #

 hh22pphh [[--dd ddeessttiinnaattiioonn ddiirreeccttoorryy]] [[--rr || --aa]] [[--ll]] [[--hh]] [[--ee]] [[--DD]] [[--QQ]]
 [[hheeaaddeerrffiilleess]]

DDEESSCCRRIIPPTTIIOONN #

 _h_2_p_h 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 --dd switch.

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

OOPPTTIIOONNSS #

 -d destination_dir
     Put the resulting ..pphh files beneath ddeessttiinnaattiioonn__ddiirr, instead of
     beneath the default Perl library location
     ($Config{'installsitearch'}).

 -r  Run recursively; if any of hheeaaddeerrffiilleess are directories, then run _h_2_p_h
     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 _h_2_p_h.  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.

 -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 ..hh file as a comment in the ..pphh file.  This
     is primarily used for debugging _h_2_p_h.

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

EENNVVIIRROONNMMEENNTT #

 No environment variables are used.

FFIILLEESS #

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

 etc.

AAUUTTHHOORR #

 Larry Wall

SSEEEE AALLSSOO #

 ppeerrll(1)

DDIIAAGGNNOOSSTTIICCSS #

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

BBUUGGSS #

 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.

perl v5.36.3 2024-03-20 H2PH(1)