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162 lines
6.2 KiB
162 lines
6.2 KiB
Copyright (C) 2016 and later: Unicode, Inc. and others.
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License & terms of use: http://www.unicode.org/copyright.html
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Copyright (C) 2000-2003, International Business Machines
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Corporation and others. All Rights Reserved.
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ICU is packaged into a number of small, interdependent packages. This
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file describes what these packages are, what their name should be
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like, and what their contents are. It is useful as a reference and a
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guide when packaging ICU on a new system.
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+ List of ICU packages.
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ICU is distributed as the following packages:
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- ICU libraries. This package contains the runtime libraries needed by
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applications that use ICU. All the other packages require this package
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to be installed.
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- ICU. This package contains the converters data, the timezones data,
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and all the ICU tools.
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- ICU locales. This package adds locales and break data.
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- ICU development. This package contains the files necessary to build
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applications that use ICU, i.e. header files, links to shared
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libraries used by the linker, static libraries, etc... It also
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contains sample applications and documentation.
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- ICU docs. This package contains further documentation for ICU,
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including a complete API reference.
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- ICU data. This package contains the source for the compiled data
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contained by the ICU package.
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- ICU international data. This package contains the source for the
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compiled data contained by the ICU locales package.
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In this file, we will refer to Autoconf variables as in $(bindir). In
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addition to these, we will use the following variables to denote
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ICU-specific directories or information:
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VERSION ICU's dotted version number, e.g. 1.6.0.1 as of this
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writing.
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ICUDATADIR The directory where portable ICU data are. This is
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defined as $(datadir)/icu/$(VERSION).
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ICULIBDIR The directory where platform-specific ICU data
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are. This is defined as $(libdir)/icu/$(VERSION).
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ICUSYSCONFDIR The directory where ICU configuration files are. This
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is defined as $(sysconfdir)/icu.
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When referring to libraries, .so will be used to denote the extension
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of a shared library, and .a to denote the extension of a static
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library. These extensions will actually be different on some platforms.
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+ Configuration and compilation of ICU
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ICU should be configured with the following options:
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--with-data-packaging=files
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--disable-rpath
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--enable-shared
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--enable-static
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--without-samples
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in addition to platform-specific settings (like a specific mandir or
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sysconfdir). Note that the use of --disable-rpath assumes that the
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packaging is made for a standard location, or that the package
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installation/deinstallation will correctly manage the configuration
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of the system's dyanmic loader. This is the right way of doing things.
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The configure script invokation should also be done with
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CFLAGS="-O2"
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set, as in:
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$ CFLAGS="-O2" ./configure ...
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The files packaging mode is chosen because it offers the maximum
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flexibility. Packages can be split easily, and system administrators
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can add converters, aliases, and other resources with little
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effort. Ideally, the ICU build will be modified to allow for distributing a
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libicudata.so with all the converters and locales, but indexes and aliases
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as separate files. But for now, this is the easiest way to get started.
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+ The ICU libraries package
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The ICU libraries package is typically named `libicuXX' where XX is
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the major number of ICU's libraries. This number is ICU's version
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number multiplied by 10 and rounded down to the nearest integer (it is
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also the value of the LIB_VERSION_MAJOR configure substitution
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variable). For example, for ICU 1.6.0.1, it is 16, so the package name
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is `libicu16'. The major version is part of the package name to allow
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for the simultaneous installation of different ICU releases.
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This package contains:
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- All the shared libraries, and their major number symbolic link, but
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not the .so symbolic link that is only used at link time (this one is
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part of the development package). These are $(libdir)/libicu*.so.* and
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$(libdir)/libustdio.so.* at the time of this writing.
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+ The ICU package
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The ICU package is simply named `icu'. It provides data used by the ICU
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libraries package and commands to create and manipulate that data.
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This package contains:
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- The Unicode data files (uprops.dat and unames.dat as of this writing).
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- The time zones data files (tz.dat).
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- All the binary data files for converters (.cnv files).
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- All the ICU commands.
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- The manual pages for ICU commands and file formats.
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+ The ICU locales package
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The ICU locales package is named `icu-locales'. It provides data used by
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internationalization support in ICU.
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This package contains:
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- All the data for locales in ICU (.dat files).
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- All the break data for specific locales (.brk files).
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+ The ICU development package
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The ICU developpment package is named `libicu-dev'. It provides all
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the files necessary to write applications that use ICU, along with
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examples and some documentation.
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This package contains:
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- The /usr/include/unicode directory which contains all the ICU
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headers.
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- The .so symbolic links used by the linker to link against the
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latest version of the libraries.
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- A sample Makefile fragment that can be included by applications
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using ICU, to faciliate their building, along with a platform-specific
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configuration file included by this fragment.
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- The sample applications from the ICU source tree, in an appropriate
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location for the system that the package is installed on (for example,
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on Debian, in /usr/share/doc/libicu-dev/examples).
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This package depends on the ICU libraries package with the exact same
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version, since it provides .so symbolic links to the latest libraries.
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+ The ICU docs package
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The ICU docs package is named `libicu-doc'. It contains the files
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generated by doxygen when the `make doc' command is executed, in a
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location appropriate for the system that the package is installed on.
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+ The ICU data package
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The ICU data package is named `icu-data'. It contains source files for
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the data found in the ICU package. These files are installed in
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$(ICUDATADIR).
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+ The ICU international data package
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The ICU data package is named `icu-i18ndata'. It contains source files for
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the dat founf in the ICU locales package. These files are installed in
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$(ICUDATADIR).
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----
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Yves Arrouye <yves@realnames.com>
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