我有一个c++ qt5的"hello world" cmake项目; 这里分别是我的main.cpp和CMakeLists.txt文件:
#include <QApplication>
#include <QWidget>
#include <QGridLayout>
#include <QLabel>
int main(int argc, char **argv)
{
QApplication app(argc, argv);
QWidget widget;
widget.resize(640, 480);
widget.setWindowTitle("Hello, world!!!");
QGridLayout *gridLayout = new QGridLayout(&widget);
QLabel * label = new QLabel("Hello, world!!!");
label->setAlignment(Qt::AlignVCenter | Qt::AlignHCenter);
gridLayout->addWidget(label);
widget.show();
return app.exec();
}
cmake_minimum_required(VERSION 3.1.0)
project(helloworld)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)
set(CMAKE_AUTOUIC ON)
if(CMAKE_VERSION VERSION_LESS "3.7.0")
set(CMAKE_INCLUDE_CURRENT_DIR ON)
endif()
message("cmake source dir = ${CMAKE_SOURCE_DIR}")
set (Qt5_DIR "/mingw64/lib/cmake/Qt5")
find_package(Qt5 COMPONENTS Widgets REQUIRED)
add_executable(helloworld
main.cpp
)
target_link_libraries(helloworld Qt5::Widgets)
我只是从官方网页复制了CMakeList，并编写了一些非常基本的main.cpp。然后我在我的Linux（openSUSE 15.0）上构建它，一切都很正常。现在我想在MSYS2上构建（以获得Windows版本）。起初，我无法构建cmake项目，因为找不到Qt5Config.cmake文件。我添加了
set (Qt5_DIR "/mingw64/lib/cmake/Qt5")
手动查找Qt5Config.cmake文件。
将此添加到我的cmake文件后，该项目已成功构建。
但是当我运行make编译程序时，我会收到以下错误：
[ 25%] Automatic MOC and UIC for target helloworld
[ 25%] Built target helloworld_autogen
[ 50%] Linking CXX executable helloworld.exe
CMakeFiles/helloworld.dir/main.cpp.o:main.cpp:(.text$_ZN15QTypedArrayDataItE10deallocateEP10QArrayData[_ZN15QTypedArrayDataItE10deallocateEP10QArrayData]+0x1c): undefined reference to `QArrayData::deallocate(QArrayData*, unsigned long, unsigned long)'
CMakeFiles/helloworld.dir/main.cpp.o:main.cpp:(.text$_ZN15QTypedArrayDataItE10deallocateEP10QArrayData[_ZN15QTypedArrayDataItE10deallocateEP10QArrayData]+0x1c): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `QArrayData::deallocate(QArrayData*, unsigned long, unsigned long)'
collect2: error: ld returned 1 exit status
make[2]: *** [CMakeFiles/helloworld.dir/build.make:102: helloworld.exe] Error 1
make[1]: *** [CMakeFiles/Makefile2:73: CMakeFiles/helloworld.dir/all] Error 2
make: *** [Makefile:84: all] Error 2
据我了解，可能存在找不到的一些缺失库。但我不知道如何修复它。
pacman -S mingw-w64-x86_64-qt5- Marseille