SDL2 with Qt6 cmake

Sreedhar

Hi,

I am trying to test SDL2 with Qt 6, but unfortunately getting the below error.

13:08:08: Running steps for project SDLTest...
13:08:08: Starting: "E:\Qt\Tools\CMake_64\bin\cmake.exe" --build "F:/Self Learning/QT/Udemy Tutorial/build-SDLTest-Desktop_Qt_6_5_2_MinGW_64_bit-Debug" --target all
ninja: error: 'SDL2-NOTFOUND', needed by 'CMakeFiles/SDLTest_autogen_timestamp_deps', missing and no known rule to make it
13:08:09: The process "E:\Qt\Tools\CMake_64\bin\cmake.exe" exited with code 1.
Error while building/deploying project SDLTest (kit: Desktop Qt 6.5.2 MinGW 64-bit)
When executing step "Build"
13:08:09: Elapsed time: 00:00.

My CMakeLists.txt is as below

cmake_minimum_required(VERSION 3.14)

project(SDLTest LANGUAGES CXX)

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 Qt5 REQUIRED COMPONENTS Core)
find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Core)


add_executable(SDLTest
  main.cpp
)

add_library(SDL2 SHARED IMPORTED)
set_target_properties(SDL2 PROPERTIES
    IMPORTED_LOCATION "${CMAKE_SOURCE_DIR}/lib/SDL2.dll"
    INTERFACE_INCLUDE_DIRECTORIES "${CMAKE_SOURCE_DIR}/include/SDL2"
)

target_link_libraries(SDLTest Qt${QT_VERSION_MAJOR}::Core SDL2)

include(GNUInstallDirs)
install(TARGETS SDLTest
    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
)

Any help is highly appreciated.

Regards,
Sreedhar

ChrisW67

@Sreedhar Nothing really to do with Qt.

Install SDL and use find_package() in your CMakeLists.txt. See Including SDL in Your Project for two variations.

Sreedhar

@ChrisW67
Thank you so much.

I added the below to my cmakelist which solved my issue

find_package(SDL2)

target_link_libraries(SDLTest2 Qt${QT_VERSION_MAJOR}::Core SDL2::SDL2)

Now I have another problem where the message is

undefined reference to `WinMain

if I change main to WinMain then the error get resolved. How do I solve this?

semlanik

@Sreedhar

Does

set_target_properties(SDLTest PROPERTIES WIN32_EXECUTABLE TRUE)

help?

ChrisW67

@Sreedhar I would guess that you need the Qt Gui component and library in order for Qt to provide the main entry point for a Windows GUI application.