[sycl-rel-6_3] Extend clang version output

.github/workflows/sycl-linux-build.yml

@@ -183,6 +183,7 @@ jobs:
       id: build
       # Emulate default value for manual dispatch as we've run out of available arguments.
       run: cmake --build $GITHUB_WORKSPACE/build --target ${{ inputs.build_target || 'sycl-toolchain' }}
+    - run: $GITHUB_WORKSPACE/build/bin/clang++ --version
     - name: check-llvm
       if: always() && !cancelled() && contains(inputs.changes, 'llvm')
       run: |

.github/workflows/sycl-rel-nightly.yml

@@ -2,17 +2,37 @@ name: SYCL Release Branch Nightly
 
 on:
   workflow_dispatch:
+    inputs:
+      sycl_build_info:
 
 permissions: read-all
 
 jobs:
+  get_build_info:
+    runs-on: ubuntu-latest
+    outputs:
+      info: ${{ steps.get_info.outputs.info }}
+    steps:
+    # TODO: version detection can be automated, e.g. by using branch name.
+    - id: get_info
+      run: |
+        if [ -n "${{ inputs.sycl_build_info }}" ]; then
+          echo "info=${{ inputs.sycl_build_info }}" >> $GITHUB_OUTPUT
+        else
+          date=$(date +'%Y-%m-%d')
+          version="6.3.0"
+          info="Nightly $date $version pre-release"
+          echo "info=$info" >> $GITHUB_OUTPUT
+        fi
+
   ubuntu2204_build:
+    needs: get_build_info
     uses: ./.github/workflows/sycl-linux-build.yml
     secrets: inherit
     with:
       build_cache_root: "/__w/"
       build_artifact_suffix: default
-      build_configure_extra_args: '-DCMAKE_POSITION_INDEPENDENT_CODE=ON -DCMAKE_INSTALL_LIBDIR=lib --disable-jit --no-assertions --add_security_flags=sanitize --hip --cuda'
+      build_configure_extra_args: '-DSYCL_BUILD_INFO="${{ needs.get_build_info.outputs.info }}" -DCMAKE_POSITION_INDEPENDENT_CODE=ON -DCMAKE_INSTALL_LIBDIR=lib --disable-jit --no-assertions --add_security_flags=sanitize --hip --cuda'
       build_image: ghcr.io/intel/llvm/release_build:latest
       pack_release: 'true'
 
@@ -78,9 +98,10 @@ jobs:
       sycl_toolchain_decompress_command: ${{ needs.ubuntu2204_build.outputs.artifact_decompress_command }}
 
   build-win:
+    needs: get_build_info
     uses: ./.github/workflows/sycl-windows-build.yml
     with:
-      build_configure_extra_args: '-DLLVM_SPIRV_ENABLE_LIBSPIRV_DIS=off -DCMAKE_POSITION_INDEPENDENT_CODE=ON --disable-jit --no-assertions --add_security_flags=sanitize'
+      build_configure_extra_args: '-DSYCL_BUILD_INFO="${{ needs.get_build_info.outputs.info }}" -DLLVM_SPIRV_ENABLE_LIBSPIRV_DIS=off -DCMAKE_POSITION_INDEPENDENT_CODE=ON --disable-jit --no-assertions --add_security_flags=sanitize'
       pack_release: 'true'
 
       # We upload both Linux/Windows build via Github's "Releases"

.github/workflows/sycl-windows-build.yml

@@ -153,6 +153,7 @@ jobs:
       shell: bash
       run: |
         cmake --build build --target ${{ inputs.build_target }}
+    - run: build/bin/clang++ --version
     - name: check-llvm
       if: always() && !cancelled() && contains(inputs.changes, 'llvm')
       shell: bash

clang/include/clang/Basic/Version.h

@@ -66,6 +66,9 @@ namespace clang {
   /// the CL_SYCL_LANGUAGE_VERSION and SYCL_LANGUAGE_VERSION macros.
   llvm::SmallVector<std::pair<llvm::StringRef, llvm::StringRef>, 2>
   getSYCLVersionMacros(const LangOptions &LangOpts);
+
+  /// Retrieves a string representing the Intel SYCL compiler build info.
+  std::string getSYCLBuildInfo();
 }
 
 #endif // LLVM_CLANG_BASIC_VERSION_H

clang/lib/Basic/CMakeLists.txt

@@ -42,6 +42,7 @@ add_custom_command(OUTPUT "${version_inc}"
                            "-DLLVM_VC_REVISION=${llvm_vc_revision}"
                            "-DLLVM_FORCE_VC_REVISION=${LLVM_FORCE_VC_REVISION}"
                            "-DLLVM_FORCE_VC_REPOSITORY=${LLVM_FORCE_VC_REPOSITORY}"
+                           "-DSYCL_BUILD_INFO=${SYCL_BUILD_INFO}"
                            -P "${generate_vcs_version_script}")
 
 # Mark the generated header as being generated.

clang/lib/Basic/Version.cpp

@@ -65,6 +65,14 @@ std::string getClangVendor() {
 #endif
 }
 
+std::string getSYCLBuildInfo() {
+#ifdef SYCL_BUILD_INFO
+  return SYCL_BUILD_INFO;
+#else
+  return "development";
+#endif
+}
+
 std::string getClangFullRepositoryVersion() {
   std::string buf;
   llvm::raw_string_ostream OS(buf);

clang/lib/Driver/Driver.cpp

@@ -2825,6 +2825,7 @@ void Driver::PrintSYCLToolHelp(const Compilation &C) const {
 }
 
 void Driver::PrintVersion(const Compilation &C, raw_ostream &OS) const {
+  OS << "Intel SYCL compiler " << getSYCLBuildInfo() << " build based on:\n";
   if (IsFlangMode()) {
     OS << getClangToolFullVersion("flang") << '\n';
   } else {

llvm/cmake/modules/GenerateVersionFromVCS.cmake

@@ -56,6 +56,11 @@ foreach(name IN LISTS NAMES)
   append_info(${name} "${revision}" "${repository}")
 endforeach()
 
+if(SYCL_BUILD_INFO)
+  file(APPEND "${HEADER_FILE}.tmp"
+      "#define SYCL_BUILD_INFO \"${SYCL_BUILD_INFO}\"\n")
+endif()
+
 # Copy the file only if it has changed.
 execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different
   "${HEADER_FILE}.tmp" "${HEADER_FILE}")