Noteworthy changes in release 2.3.4 (2022-10-23) [stable]
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Support for Unicode 15.0.0. Closes: #112. We now uses Unicode.org's IDNA2008 tables rather than IANA's. See #112 and https://lists.gnu.org/archive/html/help-libidn/2022-10/msg00000.html for rationale, which can be summarized into 1) IANA are still on 2019-era Unicode version 12 and we wish to support Unicode version 12-15, 2) consistency with some other implementations, 3) the only incompatibility related to U+19DA is deemed to have minor real-world consequences. Thus we break backwards compatibility for U+19DA in this release compared against libidn2 0.11..2.3.3 thus reverting back to the libidn2 <= 0.11 behaviour. We decided to not bump ABI version and believe this is the best choice going forward as well for minor internal non-API related ABI changes.
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Gnulib updated and now libunistring-optional is used. This allows you to force libidn2 to use internal libunistring with the following command: ./configure --with-included-libunistring