build: Add swift-buprocess to the build

Author: Steelskin

.github/workflows/swift-toolchain.yml

@@ -3743,6 +3743,12 @@ jobs:
           ref: ${{ inputs.swift_system_revision }}
           path: ${{ github.workspace }}/SourceCache/swift-system
           show-progress: false
+      - uses: actions/[email protected]
+        with:
+          repository: swiftlang/swift-subprocess
+          ref: ${{ inputs.swift_subprocess_revision }}
+          path: ${{ github.workspace }}/SourceCache/swift-subprocess
+          show-progress: false
       - uses: actions/[email protected]
         with:
           repository: swiftlang/swift-tools-support-core
@@ -3970,6 +3976,37 @@ jobs:
       - name: Build swift-system
         run: cmake --build ${{ github.workspace }}/BinaryCache/swift-system
 
+      - name: Configure swift-subprocess
+        run: |
+          # Workaround CMake 3.20 issue
+          $CLANG_CL = cygpath -m ${{ github.workspace }}/BinaryCache/Library/Developer/Toolchains/${{ inputs.swift_version }}+Asserts/usr/bin/clang-cl.exe
+          $SWIFTC = cygpath -m ${{ github.workspace }}/BinaryCache/Library/Developer/Toolchains/${{ inputs.swift_version }}+Asserts/usr/bin/swiftc.exe
+
+          cmake -B ${{ github.workspace }}/BinaryCache/swift-subprocess `
+                -D BUILD_SHARED_LIBS=NO `
+                -D BUILD_TESTING=NO `
+                -D CMAKE_BUILD_TYPE=Release `
+                -D CMAKE_C_COMPILER=${CLANG_CL} `
+                -D CMAKE_C_COMPILER_TARGET=${{ matrix.triple }} `
+                -D CMAKE_C_FLAGS="${{ inputs.WINDOWS_CMAKE_C_FLAGS }}" `
+                -D CMAKE_CXX_COMPILER=${CLANG_CL} `
+                -D CMAKE_CXX_COMPILER_TARGET=${{ matrix.triple }} `
+                -D CMAKE_CXX_FLAGS="${{ inputs.WINDOWS_CMAKE_CXX_FLAGS }}" `
+                -D CMAKE_INSTALL_PREFIX=${{ github.workspace }}/BuildRoot/Library/Developer/Toolchains/${{ inputs.swift_version }}+Asserts/usr `
+                -D CMAKE_Swift_COMPILER=${SWIFTC} `
+                -D CMAKE_Swift_COMPILER_TARGET=${{ matrix.triple }} `
+                -D CMAKE_Swift_COMPILER_WORKS=YES `
+                -D CMAKE_Swift_FLAGS="-sdk ${env:SDKROOT} ${{ inputs.CMAKE_Swift_FLAGS }}" `
+                -D CMAKE_Swift_FLAGS_RELEASE="-O" `
+                -D CMAKE_STATIC_LIBRARY_PREFIX_Swift="lib" `
+                ${{ matrix.cmake_linker_flags }} `
+                -D CMAKE_SYSTEM_NAME=Windows `
+                -D CMAKE_SYSTEM_PROCESSOR=${{ matrix.cpu }} `
+                -G Ninja `
+                -S ${{ github.workspace }}/SourceCache/swift-subprocess
+      - name: Build swift-subprocess
+        run: cmake --build ${{ github.workspace }}/BinaryCache/swift-subprocess
+
       - name: Configure swift-tools-support-core
         run: |
           # Workaround CMake 3.20 issue
@@ -4331,6 +4368,8 @@ jobs:
         run: cmake --build ${{ github.workspace }}/BinaryCache/swift-driver --target install
       - name: Install swift-build
         run: cmake --build ${{ github.workspace }}/BinaryCache/swift-build --target install
+      - name: Install swift-subprocess
+        run: cmake --build ${{ github.workspace }}/BinaryCache/swift-subprocess --target install
       - name: Install swift-package-manager
         run: cmake --build ${{ github.workspace }}/BinaryCache/swift-package-manager --target install
       - name: Install SourceKit-LSP