GitHub Actions: add FreeBSD support for .NET workflow

.github/workflows/dotnet.yml

@@ -2,9 +2,68 @@ name: .NET
 on: push
 env:
   BUILD_TYPE: Release
+  FREEBSD_DEPLOYMENT_TARGET: "13.2"
   OSX_DEPLOYMENT_TARGET: "11.0"
 
 jobs:
+  FreeBSD:
+    runs-on: ${{matrix.runner}}
+    container:
+      image: almalinux:8
+    strategy:
+      matrix:
+        arch: [arm64, x64]
+        include:
+          - arch: arm64
+            runner: ubuntu-24.04-arm
+            image-arch: arm64
+            triplet-arch: aarch64
+          - arch: x64
+            runner: ubuntu-24.04
+            image-arch: amd64
+            triplet-arch: x86_64
+    steps:
+    - name: Cloning
+      uses: actions/checkout@v5
+    - name: Install packages
+      run: dnf install -y bsdtar clang cmake lld wget
+    - name: Install FreeBSD sysroot
+      run: |
+        mkdir -p /opt/freebsd/${{matrix.triplet-arch}}-pc-freebsd${{env.FREEBSD_DEPLOYMENT_TARGET}}
+        cat > /opt/freebsd/${{matrix.triplet-arch}}-pc-freebsd${{env.FREEBSD_DEPLOYMENT_TARGET}}/toolchain.cmake << 'EOF'
+        set(CMAKE_SYSTEM_NAME FreeBSD)
+        set(CMAKE_SYSTEM_VERSION ${{env.FREEBSD_DEPLOYMENT_TARGET}})
+        set(CMAKE_SYSTEM_PROCESSOR ${{matrix.triplet-arch}})
+        set(CMAKE_C_COMPILER /usr/bin/clang)
+        set(CMAKE_CXX_COMPILER /usr/bin/clang++)
+        set(CMAKE_C_COMPILER_TARGET ${CMAKE_SYSTEM_PROCESSOR}-pc-freebsd${CMAKE_SYSTEM_VERSION})
+        set(CMAKE_CXX_COMPILER_TARGET ${CMAKE_SYSTEM_PROCESSOR}-pc-freebsd${CMAKE_SYSTEM_VERSION})
+        set(CMAKE_SYSROOT /opt/freebsd/${CMAKE_SYSTEM_PROCESSOR}-pc-freebsd${CMAKE_SYSTEM_VERSION}/sysroot)
+        set(CMAKE_EXE_LINKER_FLAGS_INIT -fuse-ld=lld)
+        set(CMAKE_FIND_ROOT_PATH ${CMAKE_SYSROOT})
+        set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+        set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+        set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+        EOF
+        mkdir -p /opt/freebsd/${{matrix.triplet-arch}}-pc-freebsd${{env.FREEBSD_DEPLOYMENT_TARGET}}/sysroot
+        wget -q https://www.syping.de/freebsd-${{env.FREEBSD_DEPLOYMENT_TARGET}}/${{matrix.image-arch}}/base.txz
+        bsdtar xfJ base.txz -C /opt/freebsd/${{matrix.triplet-arch}}-pc-freebsd${{env.FREEBSD_DEPLOYMENT_TARGET}}/sysroot
+        rm -f base.txz
+    - name: Configure CMake
+      run: cmake -B "build/shared" -DRAGEPHOTO_C_LIBRARY=ON -DRAGEPHOTO_EXTRACT=OFF -DRAGEPHOTO_UNICODE=iconv -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}} -DCMAKE_TOOLCHAIN_FILE=/opt/freebsd/${{matrix.triplet-arch}}-pc-freebsd${{env.FREEBSD_DEPLOYMENT_TARGET}}/toolchain.cmake
+    - name: Build
+      run: cmake --build "build/shared" --config ${{env.BUILD_TYPE}}
+    - name: Install
+      run: cmake --install "build/shared" --config ${{env.BUILD_TYPE}} --prefix "install/shared/"
+    - name: Preparing for Upload
+      run: |
+        mkdir "artifacts"
+        cp "install/shared/lib/libragephoto.so" "artifacts/"
+    - name: Upload
+      uses: actions/upload-artifact@v5
+      with:
+        name: FreeBSD ${{matrix.arch}}
+        path: ${{github.workspace}}/artifacts/
   Linux:
     runs-on: ${{matrix.runner}}
     container:
@@ -36,8 +95,7 @@ jobs:
     - name: Preparing for Upload
       run: |
         mkdir "artifacts"
-        cp "install/shared/${{matrix.libdir}}/libragephoto.so" \
-          "artifacts/"
+        cp "install/shared/${{matrix.libdir}}/libragephoto.so" "artifacts/"
     - name: Upload
       uses: actions/upload-artifact@v5
       with:
@@ -67,8 +125,7 @@ jobs:
     - name: Preparing for Upload
       run: |
         mkdir "artifacts"
-        cp "install/shared/lib/libragephoto.dylib" \
-          "artifacts/"
+        cp "install/shared/lib/libragephoto.dylib" "artifacts/"
     - name: Upload
       uses: actions/upload-artifact@v5
       with:
@@ -109,11 +166,21 @@ jobs:
         name: Windows ${{matrix.arch}}
         path: ${{github.workspace}}/artifacts/
   Release:
-    needs: [Linux, macOS, Windows]
+    needs: [FreeBSD, Linux, macOS, Windows]
     runs-on: windows-latest
     steps:
     - name: Cloning
       uses: actions/checkout@v5
+    - name: Download FreeBSD arm64 Artifacts
+      uses: actions/download-artifact@v6
+      with:
+        name: FreeBSD arm64
+        path: ${{github.workspace}}/src/dotnet/runtimes/freebsd-arm64/native
+    - name: Download FreeBSD x64 Artifacts
+      uses: actions/download-artifact@v6
+      with:
+        name: FreeBSD x64
+        path: ${{github.workspace}}/src/dotnet/runtimes/freebsd-x64/native
     - name: Download Linux arm64 glibc Artifacts
       uses: actions/download-artifact@v6
       with: