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

NAME  SYNOPSIS  DESCRIPTION  OPTIONS  ENVIRONMENT  FILES  AUTHOR  SEE ALSO  DIAGNOSTICS  BUGS 

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.


Updated 2024-01-29 - jenkler.se | uex.se