Arm64 Windows build and CETCOMPAT

[essial]

For some reason, the following code is getting triggered when building with VS2022/CMake on an Arm64 build (specifically arm64-Clang-Debug):

  # CET support was added in VS 16.7
  if(MSVC_VERSION GREATER 1926 AND NOT CMAKE_GENERATOR_PLATFORM MATCHES ARM)
    list(APPEND EXTRA_LDFLAGS_BUILD "-CETCOMPAT")
  endif()

This is causing build failures in my project (I include SDL2 as a submodule and build it with the project) due to trying to use CETCOMPAT on a non x86 platform. I do not have this issue when building on my M1 ARM natively.

[madebr]

Does replacing

SDL/CMakeLists.txt

Line 695 in 1b4e08b

if(MSVC_VERSION GREATER 1926 AND NOT CMAKE_GENERATOR_PLATFORM MATCHES ARM)

with

if(MSVC_VERSION GREATER 1926 AND CMAKE_GENERATOR_PLATFORM MATCHES "Win32|x64")

fix your build problem?

[cgutman]

Can you grab your CMakeCache.txt file too? That should have the value of CMAKE_GENERATOR_PLATFORM inside.

[essial]

@madebr That change fixed it, it builds and runs perfectly with that mod. Why would they check for "Not ARM" on a platform feature only available for x86/64?

@cgutman it's this:
CMAKE_GENERATOR_PLATFORM:INTERNAL=arm64

[slouken]

Fixed, thanks!