CI: Switch MacOS build to clang

Author: laanwj

.github/workflows/ci_meson.yml

@@ -46,11 +46,9 @@ jobs:
     - uses: actions/setup-python@v4
       with:
         python-version: '3.x'
-    - run: brew install gcc sdl2
+    - run: brew install sdl2
     - run: pip install meson ninja
     - run: meson setup -Dgame_cheats=true -Ddebug_ui=true builddir/
-      env:
-        CC: gcc
     - run: ninja -C builddir
     - run: meson test -C builddir/ -v
     - uses: actions/upload-artifact@v3

README.md

@@ -84,7 +84,7 @@ compatible as possible. Also, SDL2 and support for OpenGL ES 2.0+ (especially
 when coupled with [ANGLE](https://github.com/google/angle)) is widely
 available.
 
-The CI checks run on Linux (gcc), MacOS (gcc) and Windows (MSVC). However, no
+The CI checks run on Linux (gcc), MacOS (clang) and Windows (MSVC). However, no
 instructions have been contributed for manual builds on these platforms.
 
 Invocation