How to Update Unicode Support

Here are the steps for updating the Unicode support in CMUCL. First, find the desired version of Unicode from ​Unicode.org.

1. Update all the files in src/i18n. For example, for Unicode 6.3, you can find the files at ​http://www.unicode.org/Public/6.3.0/ucd. The files have the same names.
2. Modify src/tools/build-unidata.lisp and src/code/unidata.lisp to have the desired values for the Unicode major, minor, and update versions.
3. Increment the revision number in *unidata-version*.
4. Follow the instructions at the top of src/tools/build-unidata.lisp:
   1. Compile and load src/tools/build-unidata.lisp
   2. Run (build-unidata). Specify the directory (to src/i18n/ if necessary.
      1. If there are significant changes, build-unidata may not work. You will have to update build-unidata.lisp to conform to the new information.
      2. Updates to build-unidata may require corresponding changes to write-unidata.
   3. Run (write-unidata <path>) to write out the new unidata.bin file to <path>.
   4. Copy the new unidata.bin file to src/i18n/unidata.bin.
5. Rebuild cmucl
6. Using the new version of cmucl
   1. Run the tests using either
      1. The full lisp-unit test-suite
      2. Use lisp-unit and load just tests/unicode.lisp. Then run the unicode tests.
   2. There should be no failures in the tests. If there are, fix up errors and start again.

This should give a new version of cmucl with support for the new version of Unicode.