H2PH(1) Perl Programmers Reference Guide H2PH(1)
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(1,n) format. It is most easily run while in(1,8) /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(1,8) the hierarchy rooted at Perl's architec-
ture dependent library directory. You can specify a different hierar-
chy 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{'installsit-
search'}).
-r Run recursively; if(3,n) any of headerfiles are directories, then run
h2ph on all files in(1,8) 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(1,8) all
directories which your C compiler ordinarily uses. -a and -r are
mutually exclusive.
-l Symbolic links will be replicated in(1,8) the destination directory. If
-l is not specified, then links are skipped over.
-h Put ``hints'' in(1,8) the .ph files which will help in(1,8) locating problems
with h2ph. In those cases when you require a .ph file(1,n) containing
syntax errors, instead of the cryptic
[ some error(8,n) condition ] at (eval mmm) line nnn
you will see the slightly more helpful
[ some error(8,n) condition ] at filename.ph line nnn
However, the .ph files almost double in(1,8) size when built using -h.
-D Include the code from the .h file(1,n) as a comment in(1,8) the .ph 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(3,n) it can't read(2,n,1 builtins) or write(1,2) 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 {
FIRST_VALUE,
SECOND_VALUE,
#ifdef ABC
THIRD_VALUE
#endif
};
Doesn't necessarily locate all of your C compiler's internally-defined
symbols.
perl v5.8.5 2004-09-17 H2PH(1)