QJulianCalendar: No such file or directory

Szymon Sabat

I'm trying to use QJulianCalendar in my CMake Qt6 project. It says fatal error: QJulianCalendar: No such file or directory on #include <QJulianCalendar> (it doesn't say that for e.g. QCalendar so I have the core).

I have Qt 6.2.3 from Fedora repository (I just went # dnf install qt6* *qt6 *qt6* so I think I have everything); is it possible they built it w/o this part?

If I try to use QCalendar with QCalendar::System::Julian, I also can't: error: no type named 'Julian' in 'QCalendar::System'

My CMakeList.txt:

cmake_minimum_required(VERSION 3.14)

project(LanistaCore LANGUAGES CXX)

set(CMAKE_INCLUDE_CURRENT_DIR ON)
set(CMAKE_AUTOUIC ON)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

find_package(QT NAMES Qt6 COMPONENTS Core LinguistTools REQUIRED)
find_package(Qt6 COMPONENTS Core LinguistTools REQUIRED)

set(TS_FILES LanistaCore_en_150.ts)

add_library(LanistaCore SHARED
  glo_lcore.h
  units.h
  ancient_units.h
  arena.h
  arena.cpp
  fasti.h
  fasti.cpp
  pch_lcore.h
  ex_lcore.h
  ${TS_FILES}
)

target_link_libraries(LanistaCore PRIVATE Qt6::Core)

target_compile_definitions(LanistaCore PRIVATE LANISTACORE_LIBRARY)

qt_create_translation(QM_FILES ${CMAKE_SOURCE_DIR} ${TS_FILES})

hskoglund

Hi, I just tried it on Ubuntu 20.04 with Qt 6.2.4 installed via the online installer, I can create a Julian calendar just fine: e.g.

#include <QCoreApplication>
#include <QCalendar>
#include "qdebug.h"

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    auto j = QCalendar(QCalendar::System::Julian);
    qDebug() << j.name();

    return a.exec();
}

and it says "Julian"

If you try to create a Gregorian calendar, say like this:
auto g = QCalendar(QCalendar::System::Gregorian);
and that works, then perhaps you by mistake got the QT_BOOTSTRAPPED version of Qt, not the real 6.2.3 one (because on QT_BOOTSTRAPPED versions of Qt the Julian Calendar is not built).

Szymon Sabat

It doen't work with QCalendar::System::Gregorian either. Qt Creator autocomplete both Julian and Gregorian enums but then it says no type named Gregorian in QCalendar::System, does it mean I have this bootstrapped version? Is it possible there is no normal version in Fedora repo and I have to install it manually? I think I will stop using Fedora if that's the case. Should both appear in Kits? How do I check that?

I can't even Google "QT_BOOTSTRAPPED", how can one finds out what's it all about and what else I'm missing having this version? I remember having problems with no QSerialPort in Qt6 but I assumed it's just not ready.

jsulm

@Szymon-Sabat said in QJulianCalendar: No such file or directory:

but then it says no type named Gregorian in QCalendar::System

But does it build? QtCreator sometimes shows wrong errors.

Szymon Sabat

@jsulm no, it doesn't build. :(

hskoglund

If you try my example above, what error(s) do you get from the compiler?

Szymon Sabat

@hskoglund I HATE to be this guy... but it all works now. I've switched to your project, it worked, then I've switched back and it also works in my project now...

hskoglund

@Szymon-Sabat No problem. glad to hear it works now :-)

JonB

@Szymon-Sabat said in QJulianCalendar: No such file or directory:

but it all works now. I've switched to your project, it worked, then I've switched back and it also works in my project now...

Coding fairies :)