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Bug 5287

Summary: Support building for UWP with CMake
Product: SDL Reporter: Jan Niklas Hasse <jhasse>
Component: buildAssignee: Sam Lantinga <slouken>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P2 CC: jhasse
Version: HG 2.1   
Hardware: x86   
OS: Windows 10   
Attachments: Adjust CMake files to support UWP

Description Jan Niklas Hasse 2020-09-14 18:08:49 UTC 
Currently I'm using VisualC-WinRT/UWP_VS2015/SDL-UWP.sln. But I would like to use CMake for my game and integrate SDL using add_subdirectory.

Building for the UWP with CMake is possible in newer versions using:

cmake .. -DCMAKE_SYSTEM_NAME=WindowsStore -DCMAKE_SYSTEM_VERSION=10.0

while generating a Visual Studio project this way works, there are compile errors in SDL_config.h. I think CMake needs to be taught to use SDL_config_winrt.h. In CMake UWP can be detected using if(WINDOWS_STORE).
Comment 1 Jan Niklas Hasse 2020-10-19 08:23:30 UTC 
Created attachment 4481 [details]
Adjust CMake files to support UWP
Comment 2 Jan Niklas Hasse 2020-10-19 08:23:50 UTC 
I've added CMake support using the SDL-UWP project as a blueprint. It compiles fine so far but fails with linker errors:

2>SDL.obj : error LNK2019: unresolved external symbol _exit referenced in function SDL_ExitProcess
2>SDL_winrtapp_common.obj : error LNK2019: unresolved external symbol "void __cdecl `eh vector destructor iterator'(void *,unsigned __int64,unsigned __int64,void (__cdecl*)(void *))" (??_M@YAXPEAX_K1P6AX0@Z@Z) referenced in function "public: void * __cdecl Microsoft::WRL::ComPtr<struct IUnknown>::`vector deleting destructor'(unsigned int)" (??_E?$ComPtr@UIUnknown@@@WRL@Microsoft@@QEAAPEAXI@Z)
2>SDL_winrtmouse.obj : error LNK2001: unresolved external symbol "void __cdecl operator delete(void *,unsigned __int64)" (??3@YAXPEAX_K@Z)
...

This seems to be some sort of C runtime mismatch. I've found https://stackoverflow.com/questions/44826818/link-errors-when-trying-to-compile-against-an-old-std-library-and-windows-sdk so far.

Any ideas?
Comment 3 Sam Lantinga 2020-12-09 14:40:22 UTC 
Can you try the latest SDL snapshot?
http://www.libsdl.org/tmp/SDL-2.0.zip

Thanks!
Comment 4 Jan Niklas Hasse 2020-12-22 21:06:00 UTC 
I think you have https://github.com/microsoft/vcpkg/blob/master/ports/sdl2/enable-winrt-cmake.patch in mind? I'm getting the same kind of linker errors with it (target SDL2, not SDL2-static).
Comment 5 Jan Niklas Hasse 2021-01-13 17:24:51 UTC 
Actually the SDL2-static target works, if I set SDL_SENSOR to OFF. Awesome!

See this patch: https://github.com/microsoft/vcpkg/blob/master/ports/sdl2/0003-sdl2-fix-uwp-build.patch
Comment 6 Sam Lantinga 2021-01-14 22:54:18 UTC 
Patch added, thanks!
https://hg.libsdl.org/SDL/rev/01a3c077ff1f