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ICU-2235 may not need to port data building tools for new platform

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Markus Scherer 2003-11-04 17:25:23 +00:00
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@ -30,7 +30,7 @@
<abbr title="International Components for Unicode">ICU</abbr> 2.8
ReadMe</h1>
<p>Version: 2003-Oct-14<br>
<p>Version: 2003-Nov-04<br>
Copyright &copy; 1997-2003 International Business Machines Corporation and
others. All Rights Reserved.</p>
<!-- Remember that there is a copyright at the end too -->
@ -1809,11 +1809,32 @@ del common/libicuuc.so
<p>If you are using ICU's Makefiles to build ICU on a new platform, there
are a few places where you will need to add or modify some files. If you
need more help, you can always ask the icu4c-support mailing list. Once you
need more help, you can always ask the
<a href="http://oss.software.ibm.com/icu/archives/">icu4c-support mailing list</a>.
Once you
have finished porting ICU to a new platform, it is recommended that you
contribute your changes back to ICU via the icu4c-support mailing list.
This will make it easier for everyone to benefit from your work.</p>
<h4>Data For a New Platform</h4>
<p>It may not be necessary for your use of ICU to make a full ICU build work.
Most of the makefiles and build targets are for tools that are used for building
ICU's data &mdash; and an application's data if the application uses ICU
resource bundles and similar for its data.</p>
<p>Data files can be built on a different platform if both platforms share the
same endianness and the same charset family, and if memory-mappable, binary
data files are used instead of DLLs/shared libraries.
For details see the User Guide <a href="http://oss.software.ibm.com/icu/userguide/icudata.html">ICU Data</a> chapter.</p>
<p>ICU 2.8 eliminates the first condition:
It adds the icuswap tool which can be run on any platform to turn binary ICU data files
from any one of the three formats into any one of the other.
This allows to use ICU data built anywhere to be used for any target platform.</p>
<h4>Adapting Makefiles For a New Platform</h4>
<p>Try to follow the build steps from the <a href=
"#HowToBuildUNIX">UNIX</a> build instructions. If the configure script
fails, then you will need to modify some files. Here are the usual steps