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 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.
- -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.