<![CDATA[How to fix missed libicui18n.so.74 when adding qmake to Qt Creator?]]>Hello.

Yesterday, I built Qt 6.11.2 from source on my Ubuntu 24.04 laptop for I wanted to learn Qt Quick and QML (as a C++ dev, I already had some experience with Qt Widgets, but mostly only with their side of the framework). The building went well, and soon I got it done. Yet, I couldn't add this build to Qt Creator 20.0.1, when I was manually adding qmake or qmake6 to Qt Versions within Kits, I got an error:

The qmake executable /home/tea/Apps/qt-6.11.2/bin/qmake could not be added: "/home/tea/Apps/qt-6.11.2/bin/qmake" produced no output: /home/tea/Apps/qt-6.11.2/bin/qmake: error while loading shared libraries: libicui18n.so.74: cannot open shared object file: No such file or directory.

Today I've confirmed with apt that I actually do have ICU installed in the system:

libicu74 is already the newest version (74.2-1ubuntu3.1).
libicu74 set to manually installed.

The exact library libicui18n.so.74.2 lies in /usr/lib/x86_64-linux-gnu/.

Right now I don't know what to do to fix that. Maybe, that's me doing anything wrong, or that's another issue. So, any help would be highly appreciated.

]]>https://forum.qt.io/topic/165130/how-to-fix-missed-libicui18n.so.74-when-adding-qmake-to-qt-creatorRSS for NodeSat, 03 Oct 2026 13:29:03 GMTThu, 01 Oct 2026 03:57:30 GMT60<![CDATA[Reply to How to fix missed libicui18n.so.74 when adding qmake to Qt Creator? on Fri, 02 Oct 2026 05:13:05 GMT]]>@Irimitlad said in How to fix missed libicui18n.so.74 when adding qmake to Qt Creator?:

libicui18n.so.74 => /usr/local/lib/libicui18n.so.74 (0x00007457a4200000)

Why is it looking in /usr/local/lib?
Did you install this lib by yourself?

Regarding installer being stuck: take a look at https://wiki.qt.io/Online_Installer_4.x#Selecting_a_mirror_for_opensource

]]>https://forum.qt.io/post/840333https://forum.qt.io/post/840333Fri, 02 Oct 2026 05:13:05 GMT<![CDATA[Reply to How to fix missed libicui18n.so.74 when adding qmake to Qt Creator? on Fri, 02 Oct 2026 02:11:22 GMT]]>First, thank you everyone for helping.

Both libicui18n.so and libicui18n.so.74 in the directory point to libicui18n.so.74.2. The same trio lies in /usr/local/lib/:

lrwxrwxrwx 1 root root      18 Oct 2 2024 /usr/local/lib/libicui18n.so -> libicui18n.so.74.2
lrwxrwxrwx 2 root root      18 Aug 9 2024 /usr/local/lib/libicui18n.so.74 -> libicui18n.so.74.2
-rwxrwxrwx 2 root root 3455304 Aug 9 2024 /usr/local/lib/libicui18n.so.74.2
lrwxrwxrwx 1 root root      18 Aug 9 2024 /usr/lib/x86_64-linux-gnu/libicui18n.so -> libicui18n.so.74.2
lrwxrwxrwx 2 root root      18 Aug 9 2024 /usr/lib/x86_64-linux-gnu/libicui18n.so.74 -> libicui18n.so.74.2
-rwxrwxrwx 2 root root 3455304 Aug 9 2024 /usr/lib/x86_64-linux-gnu/libicui18n.so.74.2

Speaking of my reasons, I built Qt from its Git repo back then working with Widgets. However, that was in 2023 under a commercial license belonging to a company I worked for at the time. Actually, this time with my home laptop ,I tried the online installer first. It just didn't go well, the installer kept getting stuck at 90% of retrieving metadata, the cause of which I don't know, there were no error messages or anything else, and my net connection worked fine, too.

As for ldd, the paths seem to be correct:

linux-vdso.so.1 (0x00007457a56c3000)
libQt6Core.so.6 => /home/tea/Apps/qt-6.11.2/bin/../lib/libQt6Core.so.6 (0x00007457a4e00000)
libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007457a4a00000)
libc.so.6 => /usr/lib/x86_64-linux-gnu/libc.so.6 (0x00007457a4600000)
libicui18n.so.74 => /usr/local/lib/libicui18n.so.74 (0x00007457a4200000)
libicuuc.so.74 => /usr/lib/x86_64-linux-gnu/libicuuc.so.74 (0x00007457a3e00000)
libglib-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007457a4cb7000)
libz.so.1 => /usr/lib/x86_64-linux-gnu/libz.so.1 (0x00007457a54be000)
libdouble-conversion.so.3 => /usr/lib/x86_64-linux-gnu/libdouble-conversion.so.3 (0x00007457a4ca2000)
libb2.so.1 => /usr/lib/x86_64-linux-gnu/libb2.so.1 (0x00007457a4c84000)
libpcre2-16.so.0 => /usr/lib/x86_64-linux-gnu/libpcre2-16.so.0 (0x00007457a4941000)
libzstd.so.1 => /usr/lib/x86_64-linux-gnu/libzstd.so.1 (0x00007457a4887000)
libm.so.6 => /usr/lib/x86_64-linux-gnu/libm.so.6 (0x00007457a4117000)
libgcc_s.so.1 => /usr/lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007457a4859000)
/lib64/ld-linux-x86-64.so.2 (0x00007457a56c5000)
libicudata.so.74 => /usr/lib/x86_64-linux-gnu/libicudata.so.74 (0x00007457a2000000)
libpcre2-8.so.0 => /usr/lib/x86_64-linux-gnu/libpcre2-8.so.0 (0x00007457a403f000)
libgomp.so.1 => /usr/lib/x86_64-linux-gnu/libgomp.so.1 (0x00007457a45aa000)
]]>https://forum.qt.io/post/840330https://forum.qt.io/post/840330Fri, 02 Oct 2026 02:11:22 GMT<![CDATA[Reply to How to fix missed libicui18n.so.74 when adding qmake to Qt Creator? on Thu, 01 Oct 2026 18:27:57 GMT]]>Hi and welcome to devnet,

Can you also share the output of ldd /home/tea/Apps/qt-6.11.2/bin/qmake ?

]]>https://forum.qt.io/post/840328https://forum.qt.io/post/840328Thu, 01 Oct 2026 18:27:57 GMT<![CDATA[Reply to How to fix missed libicui18n.so.74 when adding qmake to Qt Creator? on Thu, 01 Oct 2026 05:53:07 GMT]]>@Irimitlad said in How to fix missed libicui18n.so.74 when adding qmake to Qt Creator?:

The exact library libicui18n.so.74.2 lies in /usr/lib/x86_64-linux-gnu/.

and is there libicui18n.so.74 symbolic link in /usr/lib/x86_64-linux-gnu/ pointing to it?
Is there a reason to build Qt by yourself?

]]>https://forum.qt.io/post/840320https://forum.qt.io/post/840320Thu, 01 Oct 2026 05:53:07 GMT