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

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

9       h2ph [-d destination directory] [-r | -a] [-l] [headerfiles]
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DESCRIPTION

12       h2ph converts any C header files specified to the corresponding Perl
13       header file format.  It is most easily run while in /usr/include:
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15               cd /usr/include; h2ph * sys/*
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17       or
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19               cd /usr/include; h2ph * sys/* arpa/* netinet/*
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21       or
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23               cd /usr/include; h2ph -r -l .
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25       The output files are placed in the hierarchy rooted at Perl's
26       architecture dependent library directory.  You can specify a different
27       hierarchy with a -d switch.
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29       If run with no arguments, filters standard input to standard output.
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OPTIONS

32       -d destination_dir
33           Put the resulting .ph files beneath destination_dir, instead of
34           beneath the default Perl library location
35           ($Config{'installsitearch'}).
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37       -r  Run recursively; if any of headerfiles are directories, then run
38           h2ph on all files in those directories (and their subdirectories,
39           etc.).  -r and -a are mutually exclusive.
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41       -a  Run automagically; convert headerfiles, as well as any .h files
42           which they include.  This option will search for .h files in all
43           directories which your C compiler ordinarily uses.  -a and -r are
44           mutually exclusive.
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46       -l  Symbolic links will be replicated in the destination directory.  If
47           -l is not specified, then links are skipped over.
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49       -h  Put ``hints'' in the .ph files which will help in locating problems
50           with h2ph.  In those cases when you require a .ph file containing
51           syntax errors, instead of the cryptic
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53                   [ some error condition ] at (eval mmm) line nnn
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55           you will see the slightly more helpful
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57                   [ some error condition ] at filename.ph line nnn
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59           However, the .ph files almost double in size when built using -h.
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61       -D  Include the code from the .h file as a comment in the .ph file.
62           This is primarily used for debugging h2ph.
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64       -Q  ``Quiet'' mode; don't print out the names of the files being
65           converted.
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ENVIRONMENT

68       No environment variables are used.
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FILES

71        /usr/include/*.h
72        /usr/include/sys/*.h
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74       etc.
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AUTHOR

77       Larry Wall
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SEE ALSO

80       perl(1)
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DIAGNOSTICS

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

86       Doesn't construct the %sizeof array for you.
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88       It doesn't handle all C constructs, but it does attempt to isolate
89       definitions inside evals so that you can get at the definitions that it
90       can translate.
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92       It's only intended as a rough tool.  You may need to dicker with the
93       files produced.
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95       You have to run this program by hand; it's not run as part of the Perl
96       installation.
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98       Doesn't handle complicated expressions built piecemeal, a la:
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100           enum {
101               FIRST_VALUE,
102               SECOND_VALUE,
103           #ifdef ABC
104               THIRD_VALUE
105           #endif
106           };
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108       Doesn't necessarily locate all of your C compiler's internally-defined
109       symbols.
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113perl v5.10.1                      2017-03-22                           H2PH(1)