Set target arch and default target triple explicitly (#1001)

This fixes an odd quirk where the JIT compiler will default to x86 when
cross compiling for arm.

* upload cmake logs on failure

.github/workflows/vcpkg_ci_amd64.yml

@@ -116,6 +116,13 @@ jobs:
           echo "VCPKG_ROOT=$(pwd)/${{ env.ARTIFACT_NAME }}" >> $GITHUB_ENV
           echo "TARGET_TRIPLET=${{ matrix.host.triplet }}" >> $GITHUB_ENV
 
+      - name: Upload CMake logs on error
+        if: failure()
+        uses: actions/upload-artifact@v3
+        with:
+          name: ${{ env.ARTIFACT_NAME }}_logs
+          path: ${{ github.workspace }}/vcpkg/buildtrees/**/*.log
+
       - name: 'Export Packages'
         if: contains(env.COMMIT_MESSAGE, 'debug artifacts') || github.event.release
         shell: 'bash'

.github/workflows/vcpkg_ci_mac.yml

@@ -99,6 +99,13 @@ jobs:
           echo "VCPKG_ROOT=$(pwd)/${{ env.ARTIFACT_NAME }}" >> $GITHUB_ENV
           echo "TARGET_TRIPLET=${{ matrix.target_arch }}-osx-rel" >> $GITHUB_ENV
 
+      - name: Upload CMake logs on error
+        if: failure()
+        uses: actions/upload-artifact@v3
+        with:
+          name: ${{ env.ARTIFACT_NAME }}_logs
+          path: ${{ github.workspace }}/vcpkg/buildtrees/**/*.log
+
       - name: 'Export Packages'
         if: contains(env.COMMIT_MESSAGE, 'debug artifacts') || github.event.release
         shell: 'bash'

ports/llvm-15/portfile.cmake

@@ -292,10 +292,28 @@ vcpkg_add_to_path(${PYTHON3_DIR})
 
 set(LLVM_LINK_JOBS 2)
 
+# Cross compilation for M1
+if (VCPKG_TARGET_IS_OSX)
+    set(LLVM_DEFAULT_TARGET_TRIPLE "${VCPKG_OSX_ARCHITECTURES}-apple-darwin")
+    list(APPEND OPTIONS "-DLLVM_DEFAULT_TARGET_TRIPLE=${LLVM_DEFAULT_TARGET_TRIPLE}")
+    message(STATUS "Default target triple ${LLVM_DEFAULT_TARGET_TRIPLE}")
+endif()
+
+if (VCPKG_TARGET_ARCHITECTURE STREQUAL "arm64")
+    set(LLVM_TARGET_ARCH "AArch64")
+elseif (VCPKG_TARGET_ARCHITECTURE STREQUAL "arm")
+    set(LLVM_TARGET_ARCH "ARM")
+elseif (VCPKG_TARGET_ARCHITECTURE STREQUAL "x86" OR VCPKG_TARGET_ARCHITECTURE STREQUAL "x64")
+    set(LLVM_TARGET_ARCH "X86")
+else()
+    message(FATAL_ERROR "Target Architecture not supported.")
+endif()
+
 vcpkg_cmake_configure(
     SOURCE_PATH ${SOURCE_PATH}/llvm
     OPTIONS
         ${FEATURE_OPTIONS}
+        ${OPTIONS}
         -DLLVM_INCLUDE_EXAMPLES=OFF
         -DLLVM_BUILD_EXAMPLES=OFF
         -DLLVM_INCLUDE_DOCS=OFF
@@ -304,6 +322,7 @@ vcpkg_cmake_configure(
         -DLLVM_BUILD_TESTS=OFF
         -DLLVM_INCLUDE_BENCHMARKS=OFF
         -DLLVM_BUILD_BENCHMARKS=OFF
+        "-DLLVM_TARGET_ARCH=${LLVM_TARGET_ARCH}"
         # Force TableGen to be built with optimization. This will significantly improve build time.
         -DLLVM_OPTIMIZED_TABLEGEN=ON
         "-DLLVM_ENABLE_PROJECTS=${LLVM_ENABLE_PROJECTS}"