build: try support C23 in Mac builds

.github/actions/prepare_macos_tooling/action.yml

@@ -40,6 +40,10 @@ runs:
         sudo port select --set pip pip312
         sudo port select --set pip3 pip312
 
+        # Install Clang to get better C23 support.
+        sudo port -N install clang-16
+        sudo port select --set clang mp-clang-16
+
         # Install the rest.
         sudo port -N install create-dmg meson ninja pkgconfig
         sudo pip3 install pyjson5
@@ -169,8 +173,8 @@ runs:
         sudo find ${{ inputs.CACHE_SRC_DIR }} -type l ! -exec test -e {} \; -exec rm {} \;
 
         # Trying to cache the source directory directly leads to permission errors,
-        # so copy it to an intermediate temporary directory. Also, expands all the symlinks to hard copies.
-        sudo rsync -arvqL ${{ inputs.CACHE_SRC_DIR }}/ ${{ inputs.CACHE_DIR }}
+        # so copy it to an intermediate temporary directory.
+        sudo rsync -arvq ${{ inputs.CACHE_SRC_DIR }}/ ${{ inputs.CACHE_DIR }}
 
     - name: "Save dependencies to cache"
       if: steps.restore-cache.outputs.cache-hit != 'true'

.github/workflows/job_build_tr1_macos.yml

@@ -82,6 +82,8 @@ jobs:
           sudo port -N install apple-pki-bundle curl-ca-bundle
 
       - name: Build arm64 and create app bundle
+        env:
+          CC: clang
         run: |
           BUILD_DIR=build-arm64
           BUILD_OPTIONS="src/tr1 --prefix=/tmp/TR1X.app --bindir=Contents/MacOS --buildtype ${{ inputs.target }}"
@@ -89,6 +91,8 @@ jobs:
           meson install -C $BUILD_DIR
 
       - name: Build x86-64
+        env:
+          CC: clang
         run: |
           BUILD_DIR=build-x86-64
           BUILD_OPTIONS="src/tr1 --prefix=/tmp/TR1X.app --bindir=Contents/MacOS --cross-file tools/shared/mac/x86-64_cross_file.txt --buildtype ${{ inputs.target }}"

.github/workflows/job_build_tr2_macos.yml

@@ -73,6 +73,8 @@ jobs:
           sudo port -N install apple-pki-bundle curl-ca-bundle
 
       - name: Build arm64 and create app bundle
+        env:
+          CC: clang
         run: |
           BUILD_DIR=build-arm64
           BUILD_OPTIONS="src/tr2 --prefix=/tmp/TR2X.app --bindir=Contents/MacOS --buildtype ${{ inputs.target }}"
@@ -80,6 +82,8 @@ jobs:
           meson install -C $BUILD_DIR
 
       - name: Build x86-64
+        env:
+          CC: clang
         run: |
           BUILD_DIR=build-x86-64
           BUILD_OPTIONS="src/tr2 --prefix=/tmp/TR2X.app --bindir=Contents/MacOS --cross-file tools/shared/mac/x86-64_cross_file.txt --buildtype ${{ inputs.target }}"