h2ph(1) - f37

1H2PH(1)                Perl Programmers Reference Guide                H2PH(1)
2
3
4

NAME

6       h2ph - convert .h C header files to .ph Perl header files
7

SYNOPSIS

9       h2ph [-d destination directory] [-r | -a] [-l] [-h] [-e] [-D] [-Q]
10       [headerfiles]
11

DESCRIPTION

13       h2ph converts any C header files specified to the corresponding Perl
14       header file format.  It is most easily run while in /usr/include:
15
16               cd /usr/include; h2ph * sys/*
17
18       or
19
20               cd /usr/include; h2ph * sys/* arpa/* netinet/*
21
22       or
23
24               cd /usr/include; h2ph -r -l .
25
26       The output files are placed in the hierarchy rooted at Perl's
27       architecture dependent library directory.  You can specify a different
28       hierarchy with a -d switch.
29
30       If run with no arguments, filters standard input to standard output.
31

OPTIONS

33       -d destination_dir
34           Put the resulting .ph files beneath destination_dir, instead of
35           beneath the default Perl library location
36           ($Config{'installsitearch'}).
37
38       -r  Run recursively; if any of headerfiles are directories, then run
39           h2ph on all files in those directories (and their subdirectories,
40           etc.).  -r and -a are mutually exclusive.
41
42       -a  Run automagically; convert headerfiles, as well as any .h files
43           which they include.  This option will search for .h files in all
44           directories which your C compiler ordinarily uses.  -a and -r are
45           mutually exclusive.
46
47       -l  Symbolic links will be replicated in the destination directory.  If
48           -l is not specified, then links are skipped over.
49
50       -h  Put 'hints' in the .ph files which will help in locating problems
51           with h2ph.  In those cases when you require a .ph file containing
52           syntax errors, instead of the cryptic
53
54                   [ some error condition ] at (eval mmm) line nnn
55
56           you will see the slightly more helpful
57
58                   [ some error condition ] at filename.ph line nnn
59
60           However, the .ph files almost double in size when built using -h.
61
62       -e  If an error is encountered during conversion, output file will be
63           removed and a warning emitted instead of terminating the conversion
64           immediately.
65
66       -D  Include the code from the .h file as a comment in the .ph file.
67           This is primarily used for debugging h2ph.
68
69       -Q  'Quiet' mode; don't print out the names of the files being
70           converted.
71

ENVIRONMENT

73       No environment variables are used.
74

FILES

76        /usr/include/*.h
77        /usr/include/sys/*.h
78
79       etc.
80

AUTHOR

82       Larry Wall
83

DIAGNOSTICS

88       The usual warnings if it can't read or write the files involved.
89

BUGS

91       Doesn't construct the %sizeof array for you.
92
93       It doesn't handle all C constructs, but it does attempt to isolate
94       definitions inside evals so that you can get at the definitions that it
95       can translate.
96
97       It's only intended as a rough tool.  You may need to dicker with the
98       files produced.
99
100       You have to run this program by hand; it's not run as part of the Perl
101       installation.
102
103       Doesn't handle complicated expressions built piecemeal, a la:
104
105           enum {
106               FIRST_VALUE,
107               SECOND_VALUE,
108           #ifdef ABC
109               THIRD_VALUE
110           #endif
111           };
112
113       Doesn't necessarily locate all of your C compiler's internally-defined
114       symbols.
115
116
117
118perl v5.36.0                      2022-08-30                           H2PH(1)