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Tom Seddon This is as of commit 50d804ea729accf9e3a9ce83238d0a2976a17545 from https://github.com/SDL-mirror/SDL, which is HEAD as I write (apologies, not confident with Mercurial) # Config macOS: 10.14.6 (18G6042) cmake --version: cmake version 3.16.20200101-g23e782c clang --version: Apple clang version 11.0.0 (clang-1100.0.33.17) Xcode version: Version 11.3.1 (11C504) # Repro steps Run the following commands in the shell. cd /tmp/ git clone https://github.com/SDL-mirror/SDL mkdir build.SDL cd build.SDL cmake -G ../SDL/ Examine cmake output. # Expected result Metal is detected. # Actual result It appears that Metal is not detected! Note this line in the summary: -- RENDER_METAL (Wanted: 0): OFF # Fix Change check_c_source_compiles to check_objc_source_compiles. The cmake script tries to add -ObjC to the clang command line, but, for whatever reason, this doesn't seem to work. Change the test source to have an empty main. The "return 0;" line seems to confuse cmake somehow, causing it to crap out with an error about HAVE_FRAMEWORK_METAL being an unknown argument. (Maybe I'm just dense, but it's not obvious to me what the problem is here.) With these two changes: -- RENDER_METAL (Wanted: ON): ON Patch attached.
Simple DirectMedia Layer
(SDL)
Version 2.0
---
https://www.libsdl.org/
Simple DirectMedia Layer is a cross-platform development library designed
to provide low level access to audio, keyboard, mouse, joystick, and graphics
hardware via OpenGL and Direct3D. It is used by video playback software,
emulators, and popular games including Valve's award winning catalog
and many Humble Bundle games.
More extensive documentation is available in the docs directory, starting
with README.md
Enjoy!
Sam Lantinga (slouken@libsdl.org)