Fix build IGC action

Fix build IGC action used in CI. Every job has been failing for over a week.

The CI got into a bad state, in the newer IGC releases the package names changed
to use dashes instead of underscores, this caused a curl command downloading the packages
to fail, which then got saved to a build cache that's used on every build.

So right now, every build is failing because it's retrieving that invalid build cache
result.

In this PR, I both workaround the build cache issue,
prevent this from happening in the future by erroring in multiple places, and fix the curl script.

The build cache issue can only be worked around because the cache is non-writable, the bad result
would need to be manually deleted by a repo admin. What we can do is just use a new cache key
if the cache result is bad, redownload and store based on the new cache key, and use
the new cache result in the actual IGC build.

I also fixed a CMake issue related to the new shared library name.

I reproduced the exact state of the repo in my fork and verified this fixes it, [here](https://github.com/sarnex/intel-graphics-compiler/actions/runs/12186673537/job/33995744349).

The LLVM 16 build failures are a separate issue.

Author: sarnex

.github/workflows/build-IGC.yml

@@ -20,28 +20,58 @@ jobs:
   download-OpenCL-Clang: # openCL Clang is downloaded from intel/intel-graphics-compiler releases
     if: github.repository == 'intel/intel-graphics-compiler'
     runs-on: ubuntu-latest
+    env:
+      CLANG_CACHE_VALID: true
+      CLANG_CACHE_KEY: none
+      ORIGINAL_CLANG_CACHE_KEY: none
+    outputs:
+      CLANG_CACHE_KEY: ${{ env.CLANG_CACHE_KEY }}
     steps:
       - uses: oprypin/find-latest-tag@v1
         with:
           repository: intel/intel-graphics-compiler
           releases-only: true
         id: get-latest-IGC-release-tag
+      - name: set initial cache key
+        run: |
+          LOC_CLANG_CACHE_KEY="${{ steps.get-latest-IGC-release-tag.outputs.tag }}"
+          echo "CLANG_CACHE_KEY=$LOC_CLANG_CACHE_KEY" >> $GITHUB_ENV
+          echo "ORIGINAL_CLANG_CACHE_KEY=$LOC_CLANG_CACHE_KEY" >> $GITHUB_ENV
       - name: caching downloaded OpenCL Clang # Downloading a new OpenCL Clang only after the new IGC is released
         id: cache-igc-release
         uses: actions/cache@v3
         with:
           path: ./igc-official-release
-          key: ${{ steps.get-latest-IGC-release-tag.outputs.tag }}
+          key: ${{ env.CLANG_CACHE_KEY }}
+      - name: checking for valid cache hit
+        if: steps.cache-igc-release.outputs.cache-hit == 'true'
+        run: |
+         if [[ $(ls ./igc-official-release | wc -c)  == "0" ]]; then
+           echo "CLANG_CACHE_VALID=false" >> $GITHUB_ENV
+           echo "CLANG_CACHE_KEY=${{ steps.get-latest-IGC-release-tag.outputs.tag }}-${{ github.sha }}-${{ github.run_id }}-${{ github.run_attempt }}" >> $GITHUB_ENV
+         fi
       - name: creating a folder for downloaded deb files
-        if: steps.cache-igc-release.outputs.cache-hit != 'true'
-        run: mkdir igc-official-release
+        if: ${{ steps.cache-igc-release.outputs.cache-hit != 'true' || env.CLANG_CACHE_VALID != 'true' }}
+        run: mkdir -p igc-official-release
       - name: download latest igc release
-        if: steps.cache-igc-release.outputs.cache-hit != 'true'
+        if:  ${{ steps.cache-igc-release.outputs.cache-hit != 'true' || env.CLANG_CACHE_VALID != 'true' }}
         working-directory: ./igc-official-release
         # To install openCL clang from Deb package, IGC must also be installed. Therefore, the last IGC release is also downloaded.
-        run: curl -s https://api.github.com/repos/intel/intel-graphics-compiler/releases/latest | grep browser_download_url | egrep 'opencl_|core_' | cut -d '"' -f 4 | wget -qi -
+        run: curl -s https://api.github.com/repos/intel/intel-graphics-compiler/releases/latest | grep browser_download_url | egrep 'opencl-|core-' | cut -d '"' -f 4 | wget -qi -
       - name: checking if downloaded deb files are here
-        run: ls ./igc-official-release
+        run: |
+          ls ./igc-official-release
+          if [[ $(ls ./igc-official-release | wc -c) == "0" ]]; then
+            exit 1
+          fi
+      - name: force redownload if invalid cache
+        if: env.CLANG_CACHE_VALID != 'true'
+        id: force-redownload
+        uses: actions/cache@v3
+        with:
+          path: ./igc-official-release
+          key: ${{ env.CLANG_CACHE_KEY }}
+          restore-keys: ${{ env.ORIGINAL_CLANG_CACHE_KEY }}
 
   build-SPIRV-LLVM-Translator:
     if: github.repository == 'intel/intel-graphics-compiler'
@@ -113,10 +143,13 @@ jobs:
         uses: actions/cache@v3
         with:
           path: ./igc-official-release
-          key: ${{ steps.get-latest-IGC-release-tag.outputs.tag }}
+          key: ${{ needs.download-OpenCL-Clang.outputs.CLANG_CACHE_KEY }}
       - name: checking if deb files are here
-        run: ls ./igc-official-release
-
+        run: |
+          ls ./igc-official-release
+          if [[ $(ls ./igc-official-release | wc -c) == "0" ]]; then
+            exit 1
+          fi
 #Get SPIRV-LLVM-Translator
       - name: cloning SPIRV-LLVM-Translator repository
         run: git clone --branch llvm_release_${{ matrix.llvm_ver }}0 https://github.com/KhronosGroup/SPIRV-LLVM-Translator

IGC/BiFModule/CMakeLists.txt

@@ -37,7 +37,15 @@ if(UNIX)
     if("${CCLANG_SONAME_VERSION}" VERSION_GREATER "5.0.0")
       set_property(TARGET opencl-clang-lib PROPERTY "IMPORTED_SONAME" "${COMMON_CLANG_LIB_FULL_NAME}.${CCLANG_SONAME_VERSION}")
     else()
-      message(FATAL_ERROR "[IGC\\BiFModule] : Version ${CCLANG_SONAME_VERSION} of library ${COMMON_CLANG_LIB_FULL_NAME} is below version 5.0.0 (where it's starts support of SPIR-V), please upgrade this library at least to version 5.0.0")
+      # Handle libopencl-clang2.so
+      string(REPLACE "-clang${CMAKE_SHARED_LIBRARY_SUFFIX}" "-clang2${CMAKE_SHARED_LIBRARY_SUFFIX}" TEST_COMMON_CLANG_LIB_FULL_NAME ${COMMON_CLANG_LIB_FULL_NAME})
+      string(REGEX MATCH "\\[${TEST_COMMON_CLANG_LIB_FULL_NAME}\\.([0-9](\\.[0-9]*)*[a-zA-Z0-9]*)\\]" CCLANG_SONAME_VERSION "${CCLANG_READELF_CALL}")
+      set(CCLANG_SONAME_VERSION "${CMAKE_MATCH_1}")
+      if(NOT CCLANG_SONAME_VERSION STREQUAL "")
+        set_property(TARGET opencl-clang-lib PROPERTY "IMPORTED_SONAME" "${TEST_COMMON_CLANG_LIB_FULL_NAME}.${CCLANG_SONAME_VERSION}")
+      else()
+        message(FATAL_ERROR "[IGC\\BiFModule] : Version ${CCLANG_SONAME_VERSION} of library ${COMMON_CLANG_LIB_FULL_NAME} is below version 5.0.0 (where it's starts support of SPIR-V), please upgrade this library at least to version 5.0.0")
+      endif()
     endif()
   endif()
   if (NOT CCLANG_FROM_SYSTEM)