build: slim llvm build

Author: alandefreitas

.github/workflows/ci.yml

@@ -375,16 +375,27 @@ jobs:
       # FIXME: Build this for the GCC and MacOS sanitizer jobs.
       # Currently GCC fails linking it, and for MacOS there are compiler-rt
       # requirements not satisfied.
+      - name: Fetch LLVM source archive
+        if: steps.llvm-cache.outputs.cache-hit != 'true' && steps.llvm-download.outputs.found != 'true'
+        run: |
+          set -eux
+          mkdir -p ../third-party
+          cd ../third-party
+          archive="llvm-${{ matrix.llvm-hash }}.zip"
+          if [ ! -d llvm-project ]; then
+            curl -L -o "$archive" "https://github.com/llvm/llvm-project/archive/${{ matrix.llvm-hash }}.zip"
+            unzip -q "$archive"
+            mv "llvm-project-${{ matrix.llvm-hash }}" llvm-project
+            rm "$archive"
+          fi
+
       - name: Install libc++
         id: install_libcxx
         uses: alandefreitas/cpp-actions/[email protected]
         if: matrix.use-libcxx == 'true' && steps.llvm-cache.outputs.cache-hit != 'true' && steps.llvm-download.outputs.found != 'true'
         with:
           cmake-version: '>=3.26'
           source-dir: ../third-party/llvm-project/runtimes
-          git-repository: https://github.com/llvm/llvm-project.git
-          git-tag: ${{ matrix.llvm-hash }}
-          download-dir: ../third-party/llvm-project
           build-dir: ${sourceDir}/build
           build-type: ${{ matrix.build-type }}
           extra-args: |
@@ -419,9 +430,6 @@ jobs:
         with:
           cmake-version: '>=3.26'
           source-dir: ../third-party/llvm-project/llvm
-          git-repository: https://github.com/llvm/llvm-project.git
-          git-tag: ${{ matrix.llvm-hash }}
-          download-dir: ../third-party/llvm-project
           patches: |
             ./third-party/patches/llvm/llvm/CMakePresets.json
             ./third-party/patches/llvm/llvm/CMakeUserPresets.json

third-party/patches/llvm/llvm/CMakePresets.json

@@ -18,6 +18,13 @@
         "LLVM_ENABLE_RUNTIMES": "libcxx",
         "LLVM_TARGETS_TO_BUILD": "Native",
 
+        "LLVM_DISTRIBUTION_COMPONENTS": "clang;clang-cpp;clang-resource-headers;llvm-headers;llvm-config",
+
+        "LLVM_ENABLE_ZLIB": false,
+        "LLVM_ENABLE_ZSTD": false,
+        "LLVM_ENABLE_LIBXML2": false,
+        "LLVM_ENABLE_BACKTRACES": false,
+
         "LLVM_UNREACHABLE_OPTIMIZE": false,
         "LLVM_ADD_NATIVE_VISUALIZERS_TO_SOLUTION": false,
         "LLVM_ENABLE_RTTI": true,
@@ -43,14 +50,20 @@
         "LLVM_BUILD_DOCS": false,
         "LLVM_BUILD_EXAMPLES": false,
         "LLVM_ENABLE_TERMINFO": false,
-        "CLANG_ENABLE_ARCMT": true,
+        "CLANG_ENABLE_ARCMT": false,
         "CLANG_ENABLE_HLSL": false,
         "CLANG_ENABLE_OBJC_REWRITER": false,
         "CLANG_ENABLE_PROTO_FUZZER": false,
-        "CLANG_ENABLE_STATIC_ANALYZER": true,
+        "CLANG_ENABLE_STATIC_ANALYZER": false,
+        "CLANG_ENABLE_FORMAT": false,
         "CLANG_INCLUDE_TESTS": false,
         "CLANG_INCLUDE_DOCS": false,
-        "CLANG_BUILD_EXAMPLES": false
+        "CLANG_BUILD_EXAMPLES": false,
+
+        "LIBCXX_ENABLE_SHARED": false,
+        "LIBCXX_ENABLE_STATIC": true,
+        "LIBCXX_INCLUDE_TESTS": false,
+        "LIBCXX_INCLUDE_BENCHMARKS": false
       },
       "warnings": {
         "unusedCli": false