Does not compile using Qt-Creator (from qt.io)

[petricf]

Describe the bug
Does not link - no libraries created

To Reproduce
Steps to reproduce the behavior:

1. git clone https://github.com/maplibre/maplibre-native-qt.git
2. cd maplibre-native-qt
3. Open Qt-Creator
4. Open project file 'CMakeLists.txt'
5. Configure for Qt 6.6.3 (Linux)
6. Start compilation
7. Error

Expected behavior
Compile successful - libraries created

Screenshots
Problems window of qtcreator:

Error: src/core/libQMapLibre.so.3.0.0: undefined reference to ubidi_setPara_72' Error: src/core/libQMapLibre.so.3.0.0: undefined reference to ubidi_close_72'
Error: src/core/libQMapLibre.so.3.0.0: undefined reference to ubidi_getVisualRun_72' Error: src/core/libQMapLibre.so.3.0.0: undefined reference to ubidi_countParagraphs_72'
Error: src/core/libQMapLibre.so.3.0.0: undefined reference to ubidi_getParagraphByIndex_72' Error: src/core/libQMapLibre.so.3.0.0: undefined reference to ubidi_writeReverse_72'
Error: src/core/libQMapLibre.so.3.0.0: undefined reference to ubidi_getProcessedLength_72' Error: src/core/libQMapLibre.so.3.0.0: undefined reference to ubidi_open_72'
Error: src/core/libQMapLibre.so.3.0.0: undefined reference to ubidi_setLine_72' Error: src/core/libQMapLibre.so.3.0.0: undefined reference to u_shapeArabic_72'
Error: src/core/libQMapLibre.so.3.0.0: undefined reference to ubidi_writeReordered_72' Error: src/core/libQMapLibre.so.3.0.0: undefined reference to u_errorName_72'
Error: src/core/libQMapLibre.so.3.0.0: undefined reference to `ubidi_countRuns_72'
Error: collect2: error: ld returned 1 exit status
Error: ninja: build stopped: subcommand failed.

Platform information (please complete the following information):

• OS: Debian Linux 12.6 (stable)
• Qt version Qt 6.6.3 from qt.io

Additional context
Using qtcreator ide from http://qt.io

Is this an other ICU problem ?
Remember - the qt-ide package from qt.io bundles icu v. 56 whereas debian delivers icu v.72

I am not firm in cmake. It seems to be that cmake compiles using icu v.72 but linking step uses v.56.

How to tell cmake to take the qt-bundled version (v.56) into account.

[ntadej]

Qt does not provide development headers for ICU unfortunately. I propose you use bundled ICU that comes with MapLibre by using -DMLN_QT_WITH_INTERNAL_ICU=ON.

[petricf]

Thank for the hint - currently compiling.

In meanwhile i tried it using QtCreator delivered by debian 12 and accompanied qt6-dev libs. cmake tell qt6location dev lib is missing. True - debian 12 does not provide it.

[ntadej]

I propose you open a ticket against Debian and ask why they do not provide this.

[petricf]

Already done - requesting QtLocation. Answer was: New packages will not be added to a release (here: Debian 12).
Have to wait for Debian 13 (?) or use unstable line.

[ntadej]

OK, but will the package be added to the next release?

[petricf]

Found a solution: Add path to bin directory of Qt (here: ~/Qt/6.6.3/gcc_64/bin) in front of $PATH environment variable.

Possible reason: I have Debian provided QtCreator also in the system.

For me this bug is solved (circumvented).

[petricf]

OK, but will the package be added to the next release?

No idea. I hope so.

[petricf]

Update ...

Checked the libs with ldd. Got:

   libicui18n.so.72 => /lib/x86_64-linux-gnu/libicui18n.so.72 (0x00007ffb59600000)
   libicuuc.so.72 => /lib/x86_64-linux-gnu/libicuuc.so.72 (0x00007ffb59402000)
   libicudata.so.72 => /lib/x86_64-linux-gnu/libicudata.so.72 (0x00007ffb57200000)

I expected to be linked with libicuuc.so.56. Am i wrong ?

cmake configure output (executed by qtcreator):

Führe /usr/bin/cmake -S /home/petric/map/maplibre-native-qt -B /home/petric/map/maplibre-native-qt-Desktop_Qt_6_6_3_GCC_64bit-Debug -DCMAKE_INSTALL_PREFIX:PATH=/home/petric/map/install-6.6.3 in /home/petric/map/maplibre-native-qt-Desktop_Qt_6_6_3_GCC_64bit-Debug aus.
-- Version 3.0.0
-- Using Qt6 (6.6.3)
-- Configuring GL-Native with OpenGL renderer backend
-- Configuring MapLibre Native with Qt platform
-- Using internal ICU
-- Building location module
-- Building widgets module
-- Configuring done
-- Generating done
-- Build files have been written to: /home/petric/map/maplibre-native-qt-Desktop_Qt_6_6_3_GCC_64bit-Debug
Verstrichene Zeit: 00:01.

I think it should be linked with icu v.56 because the other qt libs are linked to it also.

Or do i have to omit the internal ICU and give the lib path manually (how ?)

[ntadej]

This is weird. If you use internal ICU, it will not have a shared link at all. Did you do a full rebuild?

[petricf]

I have checked out from git again and built the libs (with option --fresh).

Same result - points to icu v.72.

[ntadej]

Unfortunately I can not reproduce your issue.

Can you try using -DCMAKE_TOOLCHAIN_FILE="<path-to-qt>/lib/cmake/Qt6/qt.toolchain.cmake" to specify your Qt version (or alternatively use qt-cmake wrapper)?