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date Tue, 18 Mar 2025 16:23:26 -0400
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1 .\" Hey, Emacs! This is -*-nroff-*- you know...
2 .\"
3 .\" gencmn.8: manual page for the gencmn utility
4 .\"
5 .\" Copyright (C) 2016 and later: Unicode, Inc. and others.
6 .\" License & terms of use: http://www.unicode.org/copyright.html
7 .\" Copyright (C) 2000-2001 IBM, Inc. and others.
8 .\"
9 .\" Manual page by Yves Arrouye <yves@realnames.com>.
10 .\"
11 .TH GENCMN 8 "5 November 2001" "ICU MANPAGE" "ICU 67.1 Manual"
12 .SH NAME
13 .B gencmn
14 \- generate an ICU memory-mappable data file
15 .SH SYNOPSIS
16 .B gencmn
17 [
18 .BR "\-h\fP, \fB\-?\fP, \fB\-\-help"
19 ]
20 [
21 .BR "\-v\fP, \fB\-\-verbose"
22 ]
23 [
24 .BR "\-c\fP, \fB\-\-copyright"
25 |
26 .BI "\-C\fP, \fB\-\-comment" " comment"
27 ]
28 [
29 .BI "\-d\fP, \fB\-\-destdir" " destination"
30 ]
31 [
32 .BI "\-n\fP, \fB\-\-name" " name"
33 ]
34 [
35 .BI "\-t\fP, \fB\-\-type" " fileext"
36 ]
37 [
38 .BI "\-S\fP, \fB\-\-source"
39 ]
40 [
41 .BI "\-e\fP, \fB\-\-entrypoint" " name"
42 ]
43 .I maxsize
44 [
45 .I listfilename
46 ]
47 .SH DESCRIPTION
48 .B gencmn
49 takes a set of files and packages them as an ICU memory-mappable data
50 file. The resulting data file can then be used directly by ICU.
51 .PP
52 .B gencmn
53 reads a list of files to be packaged from either the
54 supplied
55 .I listfilename
56 file, or from its standard output. It packages all the files from
57 the list that are not bigger than
58 .I maxsize
59 bytes, except if
60 .I maxsize
61 is 0, which indicates that there is no size limit on files.
62 .SH OPTIONS
63 .TP
64 .BR "\-h\fP, \fB\-?\fP, \fB\-\-help"
65 Print help about usage and exit.
66 .TP
67 .BR "\-v\fP, \fB\-\-verbose"
68 Display extra informative messages during execution.
69 .TP
70 .BR \-c\fP, \fB\-\-copyright
71 Include the ICU copyright notice in the resulting data.
72 .TP
73 .BI "\-C\fP, \fB\-\-comment" " comment"
74 Include the specified
75 .I comment
76 in the resulting data instead of the ICU copyright notice.
77 .TP
78 .BI "\-d\fP, \fB\-\-destdir" " destination"
79 Set the destination directory to
80 .IR destination .
81 The default destination directory is specified by the environment variable
82 .BR ICU_DATA .
83 .TP
84 .BI "\-n\fP, \fB\-\-name" " name"
85 Set the data name to
86 .I name
87 instead of the default. This name is also used as the base name of the
88 output. The default name is made of the
89 .I icudt
90 prefix, followed by a two-digit version number corresponding to
91 the current version of the ICU release, and a single letter indicating
92 the endianness of the data (the letter
93 .I b
94 indicated big endian data, and the letter
95 .I l
96 indicates little endian ones).
97 .TP
98 .BI "\-t\fP, \fB\-\-type" " type"
99 Use
100 .I type
101 as the type of the data. This type is also used as the extension of
102 the generated data file. The default type ie
103 .IR dat .
104 .TP
105 .BI "\-S\fP, \fB\-\-source"
106 Write a C source file with the table of contents of the data.
107 .TP
108 .BI "\-e\fP, \fB\-\-entrypoint" " name"
109 Set the data entry point (used for linking against the data in a
110 shared library form) to
111 .IR name .
112 The default entry point name is made of the data (set by the
113 .BI "\-n\fP, \fB\-\-name"
114 option) followed by an underscore and the type of the data (set by the
115 .BI "\-t\fP, \fB\-\-type"
116 option).
117 .SH ENVIRONMENT
118 .TP 10
119 .B ICU_DATA
120 Specifies the directory containing ICU data. Defaults to
121 .BR ${prefix}/share/icu/67.1/ .
122 Some tools in ICU depend on the presence of the trailing slash. It is thus
123 important to make sure that it is present if
124 .B ICU_DATA
125 is set.
126 .SH VERSION
127 67.1
128 .SH COPYRIGHT
129 Copyright (C) 2000-2001 IBM, Inc. and others.
130 .SH SEE ALSO
131 .BR decmn (8)