[Buildroot] [Bug 14931] package/qt5/qt5webengine: build fails with unicode/uchar.h not found

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=14931

--- Comment #5 from Kadir Yilmaz <kadir.c.yilmaz at gmail.com> ---
I have just submitted a patch to this  bug:

https://lists.buildroot.org/pipermail/buildroot/2023-October/677826.html

It manifests itself in 2 ways:

- If the build host has unicode/uchar.h in default include dirs, e.g. on 
ubuntu /usr/include/unicode/uchar.h provided by libicu-dev package, build finds
the header and later on linking fails.

- Otherwise fails with the error described in this bug.

By removing "webengine-icu" config option qt5webengine, build uses the one
bundled in qt, which addresses at least the build failure.

Here are the some hints in qt config files:

qtwebengine/src/core/configure.json:16:            "webengine-icu": { "type":
"enum", "name": "webengine-system-icu", "values": { "system": "yes", "qt": "no"
} },

qtwebengine/config_help.txt:8:  -webengine-icu ................. Use system ICU
libraries [system/qt]

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