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Bug 5115

Summary: MinGW sdl2-config.cmake produces bogus Makefiles
Product: SDL Reporter: Ethan Lee <flibitijibibo>
Component: buildAssignee: Sam Lantinga <slouken>
Status: NEW --- QA Contact: Sam Lantinga <slouken>
Severity: major    
Priority: P2    
Version: 2.0.12   
Hardware: All   
OS: Windows (All)   

Description Ethan Lee 2020-04-28 16:21:35 UTC 
When using SDL2-devel-2.0.12-mingw with CMake, builds will fail to start, only producing a mysterious "*** target pattern contains no '%'.  Stop."

I found out that the "if(NOT TARGET SDL2::SDL2)" block added in 2.0.12 is the root cause. Deleting this entirely gets builds to work again.

You can test this with both FAudio and FNA3D:

https://github.com/FNA-XNA/FAudio
https://github.com/FNA-XNA/FNA3D

Both builds are as simple as `mingw32-cmake .. && mingw32-make`, they should depend on nothing more than SDL2. I tested this on CentOS with the files provided by libsdl.org as well as Fedora's built-in mingw32/64-SDL2 packages.