dev-util/intel-graphics-compiler ~ fix for #739138

intel-graphics-compiler-1.0.15770-opencl-clang_version.patch

--- a/IGC/BiFModule/CMakeLists.txt
+++ b/IGC/BiFModule/CMakeLists.txt
@@ -21,24 +21,10 @@ endif()
 
 if(UNIX)
   if(NOT ${CCLANG_BUILD_INTREE_LLVM})
-    # Get common clang library soname
-    get_target_property(CCLANG_LIB_PATH opencl-clang-lib "IMPORTED_LOCATION")
-    execute_process(
-      COMMAND readelf -d ${CCLANG_LIB_PATH}
-      RESULT_VARIABLE CCLANG_READELF_RESULT
-      OUTPUT_VARIABLE CCLANG_READELF_CALL)
-    if(CCLANG_READELF_RESULT AND NOT CCLANG_READELF_RESULT EQUAL 0)
-      message(FATAL_ERROR "[IGC\\BiFModule] : Error occurred while executing readelf:  ${CCLANG_READELF_RESULT}")
-    endif()
-    string(REGEX MATCH "\\[${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}")
-
-    # Check if common clang library is newer than 5.0.0 version on which we have SPIR-V support
-    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 ${COMMON_CLANG_LIB_FULL_NAME} is below version 5.0.0 (where it's starts support of SPIR-V), please upgrade this library at least to version 5.0.0")
-    endif()
+    # Workaround for https://bugs.gentoo.org/739138 : instead of checking
+    # the version of opencl-clang, have ebuilds set CCLANG_SONAME_VERSION
+    # for us.
+    set_property(TARGET opencl-clang-lib PROPERTY "IMPORTED_SONAME" "${COMMON_CLANG_LIB_FULL_NAME}.${CCLANG_SONAME_VERSION}")
   endif()
   if (NOT CCLANG_FROM_SYSTEM)
     install(FILES $<TARGET_FILE:opencl-clang-lib> DESTINATION ${CMAKE_INSTALL_FULL_LIBDIR} COMPONENT igc-opencl)