Failure to build with LLVM15

[Bidski]

Following the build instructions here fails to allow CMake to finish configuring the project.

Specifically, I perform the following actions

BUILD_FOLDER="/var/tmp/build"
mkdir -p "${BUILD_FOLDER}/build"

cd "${BUILD_FOLDER}"
git clone --branch v2.15.3 https://github.com/intel/intel-graphics-compiler igc
git clone https://github.com/intel/vc-intrinsics vc-intrinsics
git clone --branch llvmorg-15.0.7 https://github.com/llvm/llvm-project llvm-project
git clone --branch ocl-open-150 https://github.com/intel/opencl-clang llvm-project/llvm/projects/opencl-clang
git clone --branch llvm_release_150 https://github.com/KhronosGroup/SPIRV-LLVM-Translator llvm-project/llvm/projects/llvm-spirv
git clone https://github.com/KhronosGroup/SPIRV-Tools.git SPIRV-Tools
git clone https://github.com/KhronosGroup/SPIRV-Headers.git SPIRV-Headers

git config --global user.email "builder@gmail.com"
git config --global user.name "Builder"

cd "${BUILD_FOLDER}/build"
cmake -S "${BUILD_FOLDER}/igc" \
      -B "${BUILD_FOLDER}/build" \
      -DCMAKE_BUILD_TYPE=Release \
      -Wno-dev

This produces the following output

-- The C compiler identification is GNU 14.2.1
-- The CXX compiler identification is GNU 14.2.1
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/gcc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/g++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
CMake Warning at IGC/CMakeLists.txt:168 (message):
  IGC_OPTION__ARCHITECTURE_TARGET: Target architecture is not specified.
  Trying to deduce it from context.


CMake Warning at IGC/CMakeLists.txt:178 (message):
  IGC_OPTION__ARCHITECTURE_HOST: Host architecture is not specified.  Trying
  to deduce it from context.


-- ================================ IGC Project ================================
-- Build type:  Release (single-configuration generator)
-- Build tools: OFF
-- 
-- Output directory:
--    "/var/tmp/build/build/IGC/Release"
-- Install root directory:
--    "/usr/local"
-- Architecture:
--  - target: Linux64    (detected: Linux64)
--  - host:   Linux64    (detected: Linux64)
-- 
-- Cross-compilation needed: NO
-- Cross-compilation set:    TRUE
-- 
-- Advanced:
--  - Link BiF resources:              ON
--  - Building Windows Universal:      
-- =============================================================================
-- [IGC] IGC_OPTION__LLVM_INTERIM = OFF
-- [LLVM] Current value of CMAKE_CURRENT_SOURCE_DIR : /var/tmp/build/igc/IGC
-- [Clang] No mode was specified, searching for Clang
-- [Clang] No mode was specified and the default IGC Clang source dir not exist. Try take Clang from system
-- IGC_LLVM_SPIRV_PATHS: /var/tmp/build/igc/external/llvm/../../../SPIRV-LLVM-Translator_15.0.7;/var/tmp/build/igc/external/llvm/../../../../SPIRV-LLVM-Translator_15.0.7;/var/tmp/build/igc/external/llvm/../../../llvm-spirv;/var/tmp/build/igc/external/llvm/../../../../llvm-spirv
-- [SPIRV] Using default procedure to determine SPIRV mode
-- [SPIRV] No mode was specified for SPIRV. Clang is trying to be taken from the system, so the SPIRV translator not will be built from the source
-- [LLVM] Current value of CMAKE_CURRENT_SOURCE_DIR : /var/tmp/build/igc/IGC
-- [lld] No mode was specified, searching for lld
-- [LLVM] Current value of CMAKE_CURRENT_SOURCE_DIR : /var/tmp/build/igc/IGC
-- [LLVM] No LLVM mode was selected explicitly
-- [LLVM] Search will be performed for LLVM sources first, then for prebuilds (including system LLVM)
-- [IGC] IGC will take prebuilt LLVM
-- [IGC] Searching for prebuilt LLVM in /llvm_prebuilt_windows_15.0.7;/prebuild-llvm;/opt/intel-llvm-static-15.0.7 and system directories
CMake Error at IGC/cmake/igc_llvm.cmake:14 (find_package):
  Could not find a package configuration file provided by "LLVM" (requested
  version 15.0.7) with any of the following names:

    LLVMConfig.cmake
    llvm-config.cmake

  Add the installation prefix of "LLVM" to CMAKE_PREFIX_PATH or set
  "LLVM_DIR" to a directory containing one of the above files.  If "LLVM"
  provides a separate development package or SDK, be sure it has been
  installed.
Call Stack (most recent call first):
  IGC/CMakeLists.txt:1394 (include)


-- Configuring incomplete, errors occurred!

Following #338, if I instead do this

cmake -S "${BUILD_FOLDER}/igc" \
      -B "${BUILD_FOLDER}/build" \
      -DCMAKE_POLICY_DEFAULT_CMP0002="OLD" \
      -DCMAKE_POLICY_DEFAULT_CMP0079="NEW" \
      -DIGC_OPTION__LLVM_MODE="Source" \
      -DIGC_OPTION__LLD_MODE="Source" \
      -DIGC_OPTION__CLANG_MODE="Source" \
      -DIGC_OPTION__SPIRV_TOOLS_MODE="Source" \
      -DIGC_OPTION__SPIRV_TRANSLATOR_MODE="Source" \
      -DDEFAULT_IGC_LLVM_SOURCES_DIR:PATH="${BUILD_FOLDER}/llvm-project" \
      -DDEFAULT_SPIRV_TRANSLATOR_SOURCE_DIR:PATH="${BUILD_FOLDER}/llvm-project/llvm/projects/llvm-spirv" \
      -DIGC_OPTION__CLANG_SOURCES_DIR:PATH="${BUILD_FOLDER}/llvm-project/clang" \
      -DIGC_OPTION__LLD_SOURCES_DIR:PATH="${BUILD_FOLDER}/llvm-project/lld" \
      -DIGC_OPTION__LLVM_SOURCES_DIR:PATH="${BUILD_FOLDER}/llvm-project" \
      -DIGC_OPTION__VC_INTRINSICS_SOURCES_DIR:PATH="${BUILD_FOLDER}/vc-intrinsics" \
      -DIGC_OPTION__lld_SOURCES_DIR:PATH="${BUILD_FOLDER}/llvm-project/lld" \
      -DSPIRV-Headers_SOURCE_DIR:PATH="${BUILD_FOLDER}/SPIRV-Headers" \
      -DSPIRV-Tools_SOURCE_DIR:PATH="${BUILD_FOLDER}/SPIRV-Tools" \
      -DCMAKE_BUILD_TYPE=Release \
      -Wno-dev

I instead get the following output.

-- The C compiler identification is GNU 14.2.1
-- The CXX compiler identification is GNU 14.2.1
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/gcc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/g++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
CMake Warning at IGC/CMakeLists.txt:178 (message):
  IGC_OPTION__ARCHITECTURE_HOST: Host architecture is not specified.  Trying
  to deduce it from context.


-- ================================ IGC Project ================================
-- Build type:  Release (single-configuration generator)
-- Build tools: OFF
-- 
-- Output directory:
--    "/var/tmp/build/build/IGC/Release"
-- Install root directory:
--    "/usr/local"
-- Architecture:
--  - target: Linux64    (detected: Linux64)
--  - host:   Linux64    (detected: Linux64)
-- 
-- Cross-compilation needed: NO
-- Cross-compilation set:    TRUE
-- 
-- Advanced:
--  - Link BiF resources:              ON
--  - Building Windows Universal:      
-- =============================================================================
-- [IGC] IGC_OPTION__LLVM_INTERIM = OFF
-- [Clang] Clang will be built from sources
-- [Clang] Copying stock Clang sources /var/tmp/build/llvm-project/clang to /var/tmp/build/build/IGC/llvm-deps-15.0.7/src/clang
-- IGC_LLVM_SPIRV_PATHS: /var/tmp/build/igc/external/llvm/../../../SPIRV-LLVM-Translator_15.0.7;/var/tmp/build/igc/external/llvm/../../../../SPIRV-LLVM-Translator_15.0.7;/var/tmp/build/igc/external/llvm/../../../llvm-spirv;/var/tmp/build/igc/external/llvm/../../../../llvm-spirv
-- [SPIRV] SPIRV translator will be built from sources
-- [SPIRV] Using SPIRV sources: /var/tmp/build/llvm-project/llvm/projects/llvm-spirv
-- [lld] lld will be built from sources
-- [lld] Copying stock lld sources /var/tmp/build/llvm-project/lld to /var/tmp/build/build/IGC/llvm-deps-15.0.7/src/lld
-- [LLVM] Current value of CMAKE_CURRENT_SOURCE_DIR : /var/tmp/build/igc/IGC
-- [LLVM] LLVM will be built from sources
-- [LLVM] LLVM sources folder: /var/tmp/build/llvm-project
-- [LLVM] LLVM sources in stock version: OFF
-- Found Python3: /usr/local/bin/python3.12 (found version "3.12.6") found components: Interpreter
-- Found Patch: /usr/sbin/patch
-- [LLVM] : LLVM_SOURCE_URL   = /var/tmp/build/llvm-project
-- [LLVM] : LLVM_OPTIONS      = -DLLVM_TARGETS_TO_BUILD=;-DLLVM_INCLUDE_TOOLS=ON;-DLLVM_BUILD_TOOLS=OFF;-DLLVM_INCLUDE_UTILS=ON;-DLLVM_BUILD_UTILS=OFF;-DLLVM_INCLUDE_BENCHMARKS=OFF;-DLLVM_INCLUDE_EXAMPLES=OFF;-DLLVM_INCLUDE_TESTS=OFF;-DLLVM_APPEND_VC_REV=OFF;-DLLVM_ENABLE_THREADS=ON;-DLLVM_ENABLE_PIC=ON;-DLLVM_ABI_BREAKING_CHECKS=FORCE_OFF;-DLLVM_ENABLE_DUMP=ON;-DLLVM_ENABLE_TERMINFO=OFF;-DLLVM_ENABLE_EH=ON;-DLLVM_ENABLE_RTTI=ON;-DLLVM_ENABLE_EH=ON;-DLLVM_ENABLE_RTTI=ON;-DLLVM_BUILD_32_BITS=OFF;-DLLVM_EXTERNAL_PROJECTS=clang;spirv;lld;-DLLVM_EXTERNAL_CLANG_SOURCE_DIR=/var/tmp/build/build/IGC/llvm-deps-15.0.7/src/clang;-DLLVM_EXTERNAL_SPIRV_SOURCE_DIR=/var/tmp/build/llvm-project/llvm/projects/llvm-spirv;-DLLVM_EXTERNAL_LLD_SOURCE_DIR=/var/tmp/build/build/IGC/llvm-deps-15.0.7/src/lld
-- [LLVM] : Copying stock LLVM sources /var/tmp/build/llvm-project to /var/tmp/build/build/IGC/llvm-deps-15.0.7/src/llvm
-- [LLVM] : Copying LLVM common CMake utils /var/tmp/build/llvm-project/cmake to /var/tmp/build/build/IGC/llvm-deps-15.0.7/src/cmake
-- [LLVM] : Applying patches for LLVM from version 
Applying 15.0.0/patches_external/0001-SCEV-Cache-ZExt-SCEV-expressions.patch file
Applying 15.0.0/patches_external/0002-SCEV-Cache-ZExt-SCEV-expressions.patch file
Applying 15.0.0/patches_external/0003-SCEV-Cache-ZExt-SCEV-expressions.patch file
Applying 15.0.0/patches_external/0004-SCEV-Cache-ZExt-SCEV-expressions.patch file
Applying 15.0.0/patches_external/0005-SCEV-Cache-ZExt-SCEV-expressions.patch file
Applying 15.0.0/patches_external/Backport-When-creating-a-stack-space-for-inlined-byv.patch file
Applying 15.0.0/patches_external/Don-t-emit-bitreverse-or-bswap-intrinsics-of-illegal.patch file
Applying 15.0.0/patches_external/InstCombine-Only-fold-bitcast-fptrunc-if-destination.patch file
Applying 15.0.0/patches_external/LowerSwitch-RemoveUnreachableBBs.patch file
Applying 15.0.0/patches_external/Remove-too-strict-restrictions-in-LICM-pass.patch file
Applying 15.0.0/patches_external/alter-unroll-max-upperbound-command-line-option-value.patch file
Applying 15.0.0/patches_external/check-for-NaN-before-folding-select-for-FP.patch file
Applying 15.0.0/patches_external/fix_DebugTypeInfoRemoval-remap_eval-ambiguity.patch file
Applying 15.0.0/patches_external/make-getPreviousDefRecursive-iterative.patch file
Applying 15.0.0/patches_external/no-autoupgrader-igc-struct-typed-intrinsic.patch file
Applying 15.0.0/patches_external/no-extra-BBs-in-JumpThreading-pass.patch file
Applying 15.0.0/patches_external/no-instcombine-code-sinking.patch file
Applying 15.0.0/patches_external/unify-max-alignment-with-generic-max.patch file
-- [LLVM_PATCHER] : LLVM_BUILD_TYPE   = Release
-- [LLVM] Clearing build system compilation flags
-- [LLVM] PYTHON_EXECUTABLE = /usr/local/bin/python3.12
-- The ASM compiler identification is GNU
-- Found assembler: /usr/bin/gcc
-- Looking for dlfcn.h
-- Looking for dlfcn.h - found
-- Looking for errno.h
-- Looking for errno.h - found
-- Looking for fcntl.h
-- Looking for fcntl.h - found
-- Looking for link.h
-- Looking for link.h - found
-- Looking for malloc/malloc.h
-- Looking for malloc/malloc.h - not found
-- Looking for pthread.h
-- Looking for pthread.h - found
-- Looking for signal.h
-- Looking for signal.h - found
-- Looking for sys/ioctl.h
-- Looking for sys/ioctl.h - found
-- Looking for sys/mman.h
-- Looking for sys/mman.h - found
-- Looking for sys/param.h
-- Looking for sys/param.h - found
-- Looking for sys/resource.h
-- Looking for sys/resource.h - found
-- Looking for sys/stat.h
-- Looking for sys/stat.h - found
-- Looking for sys/time.h
-- Looking for sys/time.h - found
-- Looking for sys/types.h
-- Looking for sys/types.h - found
-- Looking for sysexits.h
-- Looking for sysexits.h - found
-- Looking for termios.h
-- Looking for termios.h - found
-- Looking for unistd.h
-- Looking for unistd.h - found
-- Looking for valgrind/valgrind.h
-- Looking for valgrind/valgrind.h - not found
-- Looking for fenv.h
-- Looking for fenv.h - found
-- Looking for FE_ALL_EXCEPT
-- Looking for FE_ALL_EXCEPT - found
-- Looking for FE_INEXACT
-- Looking for FE_INEXACT - found
-- Looking for mach/mach.h
-- Looking for mach/mach.h - not found
-- Looking for CrashReporterClient.h
-- Looking for CrashReporterClient.h - not found
-- Looking for linux/magic.h
-- Looking for linux/magic.h - found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Looking for pthread_rwlock_init in pthread
-- Looking for pthread_rwlock_init in pthread - found
-- Looking for pthread_mutex_lock in pthread
-- Looking for pthread_mutex_lock in pthread - found
-- Looking for dlopen in dl
-- Looking for dlopen in dl - found
-- Looking for clock_gettime in rt
-- Looking for clock_gettime in rt - found
-- Looking for pfm_initialize in pfm
-- Looking for pfm_initialize in pfm - not found
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Success
-- Found Threads: TRUE
-- Found ZLIB: /usr/local/lib/libz.so (found version "1.3.1")
-- Looking for compress2
-- Looking for compress2 - found
-- Found LibXml2: /usr/lib/libxml2.so (found version "2.13.4")
-- Looking for xmlReadMemory
-- Looking for xmlReadMemory - found
-- Looking for histedit.h
-- Looking for histedit.h - found
-- Found LibEdit: /usr/include (found version "2.11")
-- Looking for xar_open in xar
-- Looking for xar_open in xar - not found
-- Looking for arc4random
-- Looking for arc4random - found
-- Looking for backtrace
-- Looking for backtrace - found
-- backtrace facility detected in default set of libraries
-- Found Backtrace: /usr/include
-- Performing Test C_SUPPORTS_WERROR_UNGUARDED_AVAILABILITY_NEW
-- Performing Test C_SUPPORTS_WERROR_UNGUARDED_AVAILABILITY_NEW - Failed
-- Looking for __register_frame
-- Looking for __register_frame - found
-- Looking for __deregister_frame
-- Looking for __deregister_frame - found
-- Looking for __unw_add_dynamic_fde
-- Looking for __unw_add_dynamic_fde - not found
-- Looking for _Unwind_Backtrace
-- Looking for _Unwind_Backtrace - found
-- Looking for getpagesize
-- Looking for getpagesize - found
-- Looking for sysconf
-- Looking for sysconf - found
-- Looking for getrusage
-- Looking for getrusage - found
-- Looking for setrlimit
-- Looking for setrlimit - found
-- Looking for isatty
-- Looking for isatty - found
-- Looking for futimens
-- Looking for futimens - found
-- Looking for futimes
-- Looking for futimes - found
-- Looking for sigaltstack
-- Looking for sigaltstack - found
-- Looking for lseek64
-- Looking for lseek64 - found
-- Looking for mallctl
-- Looking for mallctl - not found
-- Looking for mallinfo
-- Looking for mallinfo - found
-- Looking for mallinfo2
-- Looking for mallinfo2 - found
-- Looking for malloc_zone_statistics
-- Looking for malloc_zone_statistics - not found
-- Looking for getrlimit
-- Looking for getrlimit - found
-- Looking for posix_spawn
-- Looking for posix_spawn - found
-- Looking for pread
-- Looking for pread - found
-- Looking for sbrk
-- Looking for sbrk - found
-- Looking for strerror
-- Looking for strerror - found
-- Looking for strerror_r
-- Looking for strerror_r - found
-- Looking for strerror_s
-- Looking for strerror_s - not found
-- Looking for setenv
-- Looking for setenv - found
-- Looking for dlopen
-- Looking for dlopen - found
-- Looking for dladdr
-- Looking for dladdr - not found
-- Performing Test HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC
-- Performing Test HAVE_STRUCT_STAT_ST_MTIMESPEC_TV_NSEC - Failed
-- Performing Test HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC
-- Performing Test HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC - Success
-- Looking for __GLIBC__
-- Looking for __GLIBC__ - found
-- Looking for pthread_getname_np
-- Looking for pthread_getname_np - found
-- Looking for pthread_setname_np
-- Looking for pthread_setname_np - found
-- Looking for proc_pid_rusage
-- Looking for proc_pid_rusage - not found
-- Performing Test HAVE_STD_IS_TRIVIALLY_COPYABLE
-- Performing Test HAVE_STD_IS_TRIVIALLY_COPYABLE - Success
-- Performing Test HAVE_CXX_ATOMICS_WITHOUT_LIB
-- Performing Test HAVE_CXX_ATOMICS_WITHOUT_LIB - Success
-- Performing Test HAVE_CXX_ATOMICS64_WITHOUT_LIB
-- Performing Test HAVE_CXX_ATOMICS64_WITHOUT_LIB - Success
-- Performing Test LLVM_HAS_ATOMICS
-- Performing Test LLVM_HAS_ATOMICS - Success
-- Performing Test SUPPORTS_VARIADIC_MACROS_FLAG
-- Performing Test SUPPORTS_VARIADIC_MACROS_FLAG - Success
-- Performing Test SUPPORTS_GNU_ZERO_VARIADIC_MACRO_ARGUMENTS_FLAG
-- Performing Test SUPPORTS_GNU_ZERO_VARIADIC_MACRO_ARGUMENTS_FLAG - Failed
-- Performing Test HAS_MAYBE_UNINITIALIZED
-- Performing Test HAS_MAYBE_UNINITIALIZED - Success
-- Native target X86 is not selected; lli will not JIT code
-- Threads enabled.
-- Doxygen disabled.
-- Go bindings disabled.
-- Could NOT find OCaml (missing: OCAMLFIND OCAML_VERSION OCAML_STDLIB_PATH) 
-- Could NOT find OCaml (missing: OCAMLFIND OCAML_VERSION OCAML_STDLIB_PATH) 
-- OCaml bindings disabled.
-- Could NOT find Python module pygments
-- Could NOT find Python module pygments.lexers.c_cpp
-- Found Python module yaml
-- LLVM host triple: x86_64-unknown-linux-gnu
-- LLVM default target triple: x86_64-unknown-linux-gnu
-- Performing Test C_SUPPORTS_FPIC
-- Performing Test C_SUPPORTS_FPIC - Success
-- Performing Test CXX_SUPPORTS_FPIC
-- Performing Test CXX_SUPPORTS_FPIC - Success
-- Building with -fPIC
-- Performing Test C_SUPPORTS_FNO_SEMANTIC_INTERPOSITION
-- Performing Test C_SUPPORTS_FNO_SEMANTIC_INTERPOSITION - Success
-- Performing Test CXX_SUPPORTS_FNO_SEMANTIC_INTERPOSITION
-- Performing Test CXX_SUPPORTS_FNO_SEMANTIC_INTERPOSITION - Success
-- Performing Test SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG
-- Performing Test SUPPORTS_FVISIBILITY_INLINES_HIDDEN_FLAG - Success
-- Performing Test C_SUPPORTS_WERROR_DATE_TIME
-- Performing Test C_SUPPORTS_WERROR_DATE_TIME - Success
-- Performing Test CXX_SUPPORTS_WERROR_DATE_TIME
-- Performing Test CXX_SUPPORTS_WERROR_DATE_TIME - Success
-- Performing Test CXX_SUPPORTS_WERROR_UNGUARDED_AVAILABILITY_NEW
-- Performing Test CXX_SUPPORTS_WERROR_UNGUARDED_AVAILABILITY_NEW - Failed
-- Performing Test CXX_SUPPORTS_MISSING_FIELD_INITIALIZERS_FLAG
-- Performing Test CXX_SUPPORTS_MISSING_FIELD_INITIALIZERS_FLAG - Success
-- Performing Test C_SUPPORTS_CXX98_COMPAT_EXTRA_SEMI_FLAG
-- Performing Test C_SUPPORTS_CXX98_COMPAT_EXTRA_SEMI_FLAG - Failed
-- Performing Test CXX_SUPPORTS_CXX98_COMPAT_EXTRA_SEMI_FLAG
-- Performing Test CXX_SUPPORTS_CXX98_COMPAT_EXTRA_SEMI_FLAG - Failed
-- Performing Test C_SUPPORTS_IMPLICIT_FALLTHROUGH_FLAG
-- Performing Test C_SUPPORTS_IMPLICIT_FALLTHROUGH_FLAG - Success
-- Performing Test CXX_SUPPORTS_IMPLICIT_FALLTHROUGH_FLAG
-- Performing Test CXX_SUPPORTS_IMPLICIT_FALLTHROUGH_FLAG - Success
-- Performing Test C_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG
-- Performing Test C_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG - Failed
-- Performing Test CXX_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG
-- Performing Test CXX_SUPPORTS_COVERED_SWITCH_DEFAULT_FLAG - Failed
-- Performing Test CXX_SUPPORTS_CLASS_MEMACCESS_FLAG
-- Performing Test CXX_SUPPORTS_CLASS_MEMACCESS_FLAG - Success
-- Performing Test CXX_SUPPORTS_REDUNDANT_MOVE_FLAG
-- Performing Test CXX_SUPPORTS_REDUNDANT_MOVE_FLAG - Success
-- Performing Test CXX_SUPPORTS_PESSIMIZING_MOVE_FLAG
-- Performing Test CXX_SUPPORTS_PESSIMIZING_MOVE_FLAG - Success
-- Performing Test CXX_SUPPORTS_NOEXCEPT_TYPE_FLAG
-- Performing Test CXX_SUPPORTS_NOEXCEPT_TYPE_FLAG - Success
-- Performing Test CXX_WONT_WARN_ON_FINAL_NONVIRTUALDTOR
-- Performing Test CXX_WONT_WARN_ON_FINAL_NONVIRTUALDTOR - Failed
-- Performing Test CXX_SUPPORTS_SUGGEST_OVERRIDE_FLAG
-- Performing Test CXX_SUPPORTS_SUGGEST_OVERRIDE_FLAG - Success
-- Performing Test CXX_WSUGGEST_OVERRIDE_ALLOWS_ONLY_FINAL
-- Performing Test CXX_WSUGGEST_OVERRIDE_ALLOWS_ONLY_FINAL - Success
-- Performing Test C_WCOMMENT_ALLOWS_LINE_WRAP
-- Performing Test C_WCOMMENT_ALLOWS_LINE_WRAP - Failed
-- Performing Test C_SUPPORTS_STRING_CONVERSION_FLAG
-- Performing Test C_SUPPORTS_STRING_CONVERSION_FLAG - Failed
-- Performing Test CXX_SUPPORTS_STRING_CONVERSION_FLAG
-- Performing Test CXX_SUPPORTS_STRING_CONVERSION_FLAG - Failed
-- Performing Test C_SUPPORTS_MISLEADING_INDENTATION_FLAG
-- Performing Test C_SUPPORTS_MISLEADING_INDENTATION_FLAG - Success
-- Performing Test CXX_SUPPORTS_MISLEADING_INDENTATION_FLAG
-- Performing Test CXX_SUPPORTS_MISLEADING_INDENTATION_FLAG - Success
-- Performing Test C_SUPPORTS_FNO_FUNCTION_SECTIONS
-- Performing Test C_SUPPORTS_FNO_FUNCTION_SECTIONS - Success
-- Performing Test C_SUPPORTS_FFUNCTION_SECTIONS
-- Performing Test C_SUPPORTS_FFUNCTION_SECTIONS - Success
-- Performing Test CXX_SUPPORTS_FFUNCTION_SECTIONS
-- Performing Test CXX_SUPPORTS_FFUNCTION_SECTIONS - Success
-- Performing Test C_SUPPORTS_FDATA_SECTIONS
-- Performing Test C_SUPPORTS_FDATA_SECTIONS - Success
-- Performing Test CXX_SUPPORTS_FDATA_SECTIONS
-- Performing Test CXX_SUPPORTS_FDATA_SECTIONS - Success
-- Looking for os_signpost_interval_begin
-- Looking for os_signpost_interval_begin - not found
-- Found Python3: /usr/local/bin/python3.12 (found suitable version "3.12.6", minimum required is "3.0") found components: Interpreter
-- Linker detection: GNU ld
-- Setting native build dir to /var/tmp/build/build/IGC/llvm-deps-15.0.7/build/src/NATIVE
-- Performing Test HAS_WERROR_GLOBAL_CTORS
-- Performing Test HAS_WERROR_GLOBAL_CTORS - Failed
-- Looking for __x86_64__
-- Looking for __x86_64__ - found
-- Found Git: /usr/sbin/git (found version "2.46.2")
-- Found PkgConfig: /usr/sbin/pkg-config (found version "2.1.1")
-- SPIR-V Headers location is not specified. Will try to download
          spirv.hpp from https://github.com/KhronosGroup/SPIRV-Headers into
          /var/tmp/build/build/IGC/llvm-deps-15.0.7/build/src/projects/llvm-spirv/SPIRV-Headers
-- Checking for one of the modules 'SPIRV-Tools'
-- SPIRV-Tools not found; project will be built without --spirv-tools-dis support.
-- [OPENCL-CLANG] Using Clang source code direcotry: /var/tmp/build/build/IGC/llvm-deps-15.0.7/src/clang
-- [OPENCL-CLANG] Using SPIRV-LLVM-Translator source code directory: /var/tmp/build/build/IGC/llvm-deps-15.0.7/src/llvm/projects/llvm-spirv
-- APPLY_PATCHES is enabled.
-- [OPENCL-CLANG] Patching repository /var/tmp/build/build/IGC/llvm-deps-15.0.7/src
-- [OPENCL-CLANG] Validating release/15.x in repository
fatal: ambiguous argument 'release/15.x': unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'
-- [OPENCL-CLANG] ref release/15.x not exists in repository, using current HEAD:8dfdcc7b7bf66834a761bd8de445840ef68e4d1a
-- [OPENCL-CLANG] Switched to a new branch 'ocl-open-150' which starts from ref : 8dfdcc7b7bf66834a761bd8de445840ef68e4d1a
-- [OPENCL-CLANG] Checking if patch 1ca45b5f5725a447ded14c0096df39f2751c4e9a is present in repository
fatal: Not a valid commit name 1ca45b5f5725a447ded14c0096df39f2751c4e9a
-- [OPENCL-CLANG] Not present - Applying: Remove __IMAGE_SUPPORT__ macro for SPIR

-- [OPENCL-CLANG] Checking if patch 9780cc0e044c73dcd549c67a1278a4ff7daf3b01 is present in repository
fatal: Not a valid commit name 9780cc0e044c73dcd549c67a1278a4ff7daf3b01
-- [OPENCL-CLANG] Not present - Applying: Remove wrong check of __opencl_c_images feature macro

-- [OPENCL-CLANG] Checking if patch bb5e22800857f7dda9a2491a4f2fc7387d4205b0 is present in repository
fatal: Not a valid commit name bb5e22800857f7dda9a2491a4f2fc7387d4205b0
-- [OPENCL-CLANG] Not present - Applying: Fix checking mechanism for read_write Image type

-- [OPENCL-CLANG] Checking if patch a60b8f468119065f8a6cb4a16598263cb00de0b5 is present in repository
-- [OPENCL-CLANG] Not present - Applying: Allow undefining header-only features

-- [OPENCL-CLANG] Checking if patch 62267fec4a0d74472bc64695597f2477cc8c11df is present in repository
fatal: Not a valid commit name 62267fec4a0d74472bc64695597f2477cc8c11df
-- [OPENCL-CLANG] Not present - Applying: Enable use of GNU C extension - const statement expression as array size

-- [OPENCL-CLANG] Applied patch successfully!
-- [OPENCL-CLANG] No patches in /var/tmp/build/build/IGC/llvm-deps-15.0.7/src/llvm/projects/opencl-clang/patches/spirv
-- Looking for sys/resource.h
-- Looking for sys/resource.h - found
-- Clang version: 15.0.7
-- Performing Test CXX_SUPPORTS_NO_NESTED_ANON_TYPES_FLAG
-- Performing Test CXX_SUPPORTS_NO_NESTED_ANON_TYPES_FLAG - Failed
-- Looking for include file sys/inotify.h
-- Looking for include file sys/inotify.h - found
-- Not building amdgpu-arch: hsa-runtime64 not found
-- LLD version: 15.0.7
-- SPIR-V Headers location is not specified. Will try to download
          spirv.hpp from https://github.com/KhronosGroup/SPIRV-Headers into
          /var/tmp/build/build/IGC/llvm-deps-15.0.7/build/src/tools/spirv/SPIRV-Headers
-- Checking for one of the modules 'SPIRV-Tools'
-- SPIRV-Tools not found; project will be built without --spirv-tools-dis support.
CMake Error at /var/tmp/build/build/IGC/llvm-deps-15.0.7/src/llvm/cmake/modules/AddLLVM.cmake:559 (add_library):
  add_library cannot create target "LLVMSPIRVLib" because another target with
  the same name already exists.  The existing target is a static library
  created in source directory
  "/var/tmp/build/build/IGC/llvm-deps-15.0.7/src/llvm/projects/llvm-spirv/lib/SPIRV".
  See documentation for policy CMP0002 for more details.
Call Stack (most recent call first):
  /var/tmp/build/build/IGC/llvm-deps-15.0.7/src/llvm/cmake/modules/AddLLVM.cmake:819 (llvm_add_library)
  /var/tmp/build/llvm-project/llvm/projects/llvm-spirv/lib/SPIRV/CMakeLists.txt:1 (add_llvm_library)


CMake Error at /var/tmp/build/build/IGC/llvm-deps-15.0.7/src/llvm/cmake/modules/AddLLVM.cmake:735 (add_custom_target):
  add_custom_target cannot create target "install-LLVMSPIRVLib" because
  another target with the same name already exists.  The existing target is a
  custom target created in source directory
  "/var/tmp/build/build/IGC/llvm-deps-15.0.7/src/llvm/projects/llvm-spirv/lib/SPIRV".
  See documentation for policy CMP0002 for more details.
Call Stack (most recent call first):
  /var/tmp/build/build/IGC/llvm-deps-15.0.7/src/llvm/cmake/modules/AddLLVM.cmake:853 (add_llvm_install_targets)
  /var/tmp/build/llvm-project/llvm/projects/llvm-spirv/lib/SPIRV/CMakeLists.txt:1 (add_llvm_library)


CMake Error at /var/tmp/build/build/IGC/llvm-deps-15.0.7/src/llvm/cmake/modules/AddLLVM.cmake:931 (add_executable):
  add_executable cannot create target "llvm-spirv" because another target
  with the same name already exists.  The existing target is an executable
  created in source directory
  "/var/tmp/build/build/IGC/llvm-deps-15.0.7/src/llvm/projects/llvm-spirv/tools/llvm-spirv".
  See documentation for policy CMP0002 for more details.
Call Stack (most recent call first):
  /var/tmp/build/build/IGC/llvm-deps-15.0.7/src/llvm/cmake/modules/AddLLVM.cmake:1297 (add_llvm_executable)
  /var/tmp/build/build/IGC/llvm-deps-15.0.7/src/llvm/cmake/modules/AddLLVM.cmake:1322 (llvm_add_tool)
  /var/tmp/build/llvm-project/llvm/projects/llvm-spirv/tools/llvm-spirv/CMakeLists.txt:12 (add_llvm_tool)


-- [SPIRV] Translator is built with LLVM
OPT OpaquePtrs Status: -opaque-pointers=0
Clang OpaquePtrs Status: -no-opaque-pointers
-- [lld] option = ON
-- [lldELF] from sources: ON
-- [lldELF] include dir: /var/tmp/build/build/IGC/llvm-deps-15.0.7/src/lld/ELF/../include
-- [IGC] Using LLVMSPIRVLib that comes with LLVM
CMake Warning at IGC/cmake/igc_find_protobuf.cmake:25 (message):
  Cannot find Protoc program or library for Protobuf, please visit
  https://github.com/protocolbuffers/protobuf/releases and install - disable
  of IGC Metrics
Call Stack (most recent call first):
  IGC/CMakeLists.txt:1537 (include)


-- ============================ SPIRV-Tools project ============================
-- [SPIRV-Tools] : IGC_OPTION__SPIRV_TOOLS_MODE set to Source
-- [SPIRV-Tools] : IGC_OPTION__USE_PREINSTALLED_SPRIV_HEADERS set to OFF
-- [SPIRV-Tools] : Building from source
-- [SPIRV-Tools] : Current source dir: /var/tmp/build/igc/IGC
-- SPIRV-Tools source directory: /var/tmp/build/igc/IGC/../../SPIRV-Tools
-- SPIRV-Headers source directory: /var/tmp/build/igc/IGC/../../SPIRV-Headers
-- SPIRV-Tools output directory: /var/tmp/build/build/IGC/Release/external/SPIRV-Tools/build
-- Option SKIP_SPIRV_TOOLS_INSTALL: ON
-- Option SPIRV_SKIP_TESTS: ON
-- Option SPIRV_SKIP_EXECUTABLES: ON
-- Option SPIRV_HEADERS_SKIP_INSTALL: ON
-- Option SPIRV_HEADERS_SKIP_EXAMPLES: ON
-- Found Python3: /usr/local/bin/python3.12 (found version "3.12.6") found components: Interpreter
-- =============================================================================
Prebuild OpenCL Clang Linux Path: prebuild-opencl-clang-linux/linux//
-- [IGC] : opencl-clang will be taken from sources
-- [IGC] : opencl-clang will be taken from sources
-- [CMFE] CM Frontend headers are taken from: /var/tmp/build/igc/IGC/CMFE/AdaptorCM
-- [CMFE] Using CMFE library name: libclangFEWrapper.so
[IGC\BiFModuleCache] - IGC_BUILD__BIF_ROOT_DIR: /var/tmp/build/build/IGC/Release/bif/
[IGC\BiFModuleCache] - Looking for files inside /var/tmp/build/igc/IGC/BiFModule/cmake/../
[IGC\BiFModuleCache] - BiFModule_SRC: /var/tmp/build/igc/IGC/BiFModule/cmake/../
-- +++ Source/IGC/VectorCompiler +++
-- [VC] Build proj: VectorCompiler
-- [VC] Using vc-intrinsics source from: /var/tmp/build/igc/IGC/VectorCompiler/../../../vc-intrinsics/GenXIntrinsics
vc_build_bif - VCBiFPrintfOCL32 has extra dependencies: /var/tmp/build/igc/IGC/VectorCompiler/lib/BiF/Print/common.h
vc_build_bif - VCBiFPrintfOCL32 has extra dependencies: /var/tmp/build/igc/IGC/VectorCompiler/lib/BiF/Print/common.h
vc_build_bif - VCBiFPrintfOCL64 has extra dependencies: /var/tmp/build/igc/IGC/VectorCompiler/lib/BiF/Print/common.h
vc_build_bif - VCBiFPrintfOCL64 has extra dependencies: /var/tmp/build/igc/IGC/VectorCompiler/lib/BiF/Print/common.h
vc_build_bif - VCBiFPrintfZE32 has extra dependencies: /var/tmp/build/igc/IGC/VectorCompiler/lib/BiF/Print/common.h
vc_build_bif - VCBiFPrintfZE32 has extra dependencies: /var/tmp/build/igc/IGC/VectorCompiler/lib/BiF/Print/common.h
vc_build_bif - VCBiFPrintfZE64 has extra dependencies: /var/tmp/build/igc/IGC/VectorCompiler/lib/BiF/Print/common.h
vc_build_bif - VCBiFPrintfZE64 has extra dependencies: /var/tmp/build/igc/IGC/VectorCompiler/lib/BiF/Print/common.h
-- IGC\Metrics - metrics are disabled
-- Configuring Intel Gen Assembler (IGA) Component
--  - GED_BRANCH:           GED_external
--  - CMAKE_CXX_COMPILER:   /usr/bin/g++
--  - IGA_VERSION_SUFFIX:    -a58477b8e
-- Found BISON: /usr/sbin/bison (found version "3.8.2")
-- Found FLEX: /usr/sbin/flex (found version "2.6.4")
-- Configuring incomplete, errors occurred!

What is the correct way to build this project?

[unhappy-ending]

It also fails to build with LLVM 20.

[882/1073] /usr/lib/llvm/20/bin/clang++-20 -DBIF_LINK_BC -DCL_KHR_FP64_EXT -DGHAL3D=USC -DICBE_LINUX -DIGC_CMAKE -DIGC_EXPORTS=1 -DIGC_SPIRV_ENABLED -DIGC_SPIRV_TOOLS_ENABLED -DIGC_VC_ENABLED -DINSIDE_PLUGIN -DISTDLIB_UMD -DLINUX -DLLVM_VERSION_MAJOR=15 -DNDEBUG -DNOMINMAX -DSTD_CALL -DUSC_EXPORTS=1 -DUSE_MMX -DUSE_SSE -DUSE_SSE2 -DUSE_SSE3 -DUSE_SSSE3 -D_AMD64_ -D_COMPILER_DLL_ -D_CRT_SECURE_NO_WARNINGS -D_HAS_EXCEPTIONS=0 -D_IGC_ -D_SCL_SECURE_NO_WARNINGS -D__IGC_OPAQUE_POINTERS_API_ENABLED=false -D__IGC_OPAQUE_POINTERS_DEFAULT_ARG_CLANG=\"-no-opaque-pointers\" -D__STDC_CONSTANT_MACROS -D__STDC_LIMIT_MACROS -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/WrapperLLVM/include -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1_build/IGC/autogen -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/common -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/.. -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/../Common -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/../3d/common -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/../inc -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/../inc/common -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/../inc/common/Compiler -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/../inc/common/Compiler/API -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/../visa/include -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1_build/IGC/Release -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1_build/IGC -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/AdaptorOCL/ocl_igc_shared/executable_format -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/AdaptorOCL -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1_build/IGC/AdaptorOCL/ocl_igc_interface/impl -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/Options -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/Options/include -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1_build/IGC/Options/include -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/../inc/common/Compiler/common-I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/AdaptorOCL/cif/cif/.. -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/../../../SPIRV-LLVM-Translator/include -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/../../../SPIRV-LLVM-Translator/lib/SPIRV -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/../../../SPIRV-LLVM-Translator/lib/SPIRV/Mangler -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/ZEBinWriter/zebin/source -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/ZEBinWriter/zebin/source/autogen -I/include -isystem /usr/lib/llvm/15/include  -DNDEBUG -march=native -pipe -faddrsig -fdata-sections -ffp-contract=fast -ffunction-sections -fno-semantic-interposition -fdiagnostics-color=always -frecord-gcc-switches -Werror=format-security -Werror=odr -Werror=strict-aliasing -U_GLIBCXX_ASSERTIONS -fexceptions -O2 -fmessage-length=0 -march=corei7 -mstackrealign -fms-extensions -Wno-unused-parameter -Wno-missing-field-initializers -Wwrite-strings -Wno-long-long -Wswitch -Wno-sign-compare -Wno-unused-result -Wno-enum-compare -Wno-type-limits -Wno-ignored-qualifiers -Wno-shadow -Wformat -Wformat-security -Wno-extra -Wno-write-strings -finline -fno-strict-aliasing -msse -msse2 -msse3 -mssse3 -msse4 -msse4.1 -msse4.2 -Wno-unknown-pragmas -fPIC -Bsymbolic -fstack-protector -finline-functions -fbracket-depth=1024 -fno-rtti -fvisibility=hidden -fvisibility-inlines-hidden -g -std=gnu++17 -MD -MT IGC/VISALinkerDriver/CMakeFiles/VISALinkerDriver.dir/VLD.cpp.o -MF IGC/VISALinkerDriver/CMakeFiles/VISALinkerDriver.dir/VLD.cpp.o.d -o IGC/VISALinkerDriver/CMakeFiles/VISALinkerDriver.dir/VLD.cpp.o -c /etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/VISALinkerDriver/VLD.cpp
FAILED: [code=1] IGC/VISALinkerDriver/CMakeFiles/VISALinkerDriver.dir/VLD.cpp.o
/usr/lib/llvm/20/bin/clang++-20 -DBIF_LINK_BC -DCL_KHR_FP64_EXT -DGHAL3D=USC -DICBE_LINUX -DIGC_CMAKE -DIGC_EXPORTS=1 -DIGC_SPIRV_ENABLED -DIGC_SPIRV_TOOLS_ENABLED -DIGC_VC_ENABLED -DINSIDE_PLUGIN -DISTDLIB_UMD -DLINUX -DLLVM_VERSION_MAJOR=15 -DNDEBUG -DNOMINMAX -DSTD_CALL -DUSC_EXPORTS=1 -DUSE_MMX -DUSE_SSE -DUSE_SSE2 -DUSE_SSE3 -DUSE_SSSE3 -D_AMD64_ -D_COMPILER_DLL_ -D_CRT_SECURE_NO_WARNINGS -D_HAS_EXCEPTIONS=0 -D_IGC_ -D_SCL_SECURE_NO_WARNINGS -D__IGC_OPAQUE_POINTERS_API_ENABLED=false -D__IGC_OPAQUE_POINTERS_DEFAULT_ARG_CLANG=\"-no-opaque-pointers\" -D__STDC_CONSTANT_MACROS -D__STDC_LIMIT_MACROS -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/WrapperLLVM/include -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1_build/IGC/autogen -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/common -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/.. -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/../Common -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/../3d/common-I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/../inc -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/../inc/common -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/../inc/common/Compiler -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/../inc/common/Compiler/API -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/../visa/include -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1_build/IGC/Release -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1_build/IGC -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/AdaptorOCL/ocl_igc_shared/executable_format -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/AdaptorOCL -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1_build/IGC/AdaptorOCL/ocl_igc_interface/impl -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/Options -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/Options/include -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1_build/IGC/Options/include -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/../inc/common/Compiler/common -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/AdaptorOCL/cif/cif/.. -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/../../../SPIRV-LLVM-Translator/include -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/../../../SPIRV-LLVM-Translator/lib/SPIRV -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/../../../SPIRV-LLVM-Translator/lib/SPIRV/Mangler -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/ZEBinWriter/zebin/source -I/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/ZEBinWriter/zebin/source/autogen -I/include -isystem /usr/lib/llvm/15/include  -DNDEBUG -march=native -pipe -faddrsig -fdata-sections -ffp-contract=fast -ffunction-sections -fno-semantic-interposition -fdiagnostics-color=always -frecord-gcc-switches -Werror=format-security -Werror=odr -Werror=strict-aliasing -U_GLIBCXX_ASSERTIONS -fexceptions -O2 -fmessage-length=0 -march=corei7 -mstackrealign -fms-extensions -Wno-unused-parameter -Wno-missing-field-initializers -Wwrite-strings -Wno-long-long -Wswitch -Wno-sign-compare -Wno-unused-result -Wno-enum-compare -Wno-type-limits -Wno-ignored-qualifiers -Wno-shadow -Wformat -Wformat-security -Wno-extra -Wno-write-strings -finline -fno-strict-aliasing -msse -msse2 -msse3 -mssse3 -msse4 -msse4.1 -msse4.2 -Wno-unknown-pragmas -fPIC -Bsymbolic -fstack-protector -finline-functions -fbracket-depth=1024 -fno-rtti -fvisibility=hidden -fvisibility-inlines-hidden -g -std=gnu++17 -MD -MT IGC/VISALinkerDriver/CMakeFiles/VISALinkerDriver.dir/VLD.cpp.o -MF IGC/VISALinkerDriver/CMakeFiles/VISALinkerDriver.dir/VLD.cpp.o.d -o IGC/VISALinkerDriver/CMakeFiles/VISALinkerDriver.dir/VLD.cpp.o -c /etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/VISALinkerDriver/VLD.cpp
In file included from /etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/VISALinkerDriver/VLD.cpp:12:
In file included from /etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/AdaptorOCL/ocl_igc_interface/impl/igc_ocl_translation_ctx_impl.h:12:
In file included from /etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/AdaptorOCL/ocl_igc_interface/impl/igc_ocl_device_ctx_impl.h:16:
In file included from /etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/AdaptorOCL/cif/cif/../cif/export/cif_main_impl.h:15:
/etc/portage/package.tmp/portage/dev-util/intel-graphics-compiler-2.14.1/work/intel-graphics-compiler-2.14.1/IGC/AdaptorOCL/cif/cif/../cif/export/registry.h:49:59: error: a template argument list is expected after a name prefixed by the template keyword [-Wmissing-template-arg-list-after-template-kw]
49 |         return CIF::InterfaceCreator<Interface>::template CreateInterfaceVer(version, version, parent);
|                                                           ^
1 error generated.

[unhappy-ending]

Clang is demanding a change here in IGC/AdaptorOCL/cif/cif/export/registry.h:

template <template <Version_t> class Interface> struct EntryPointInterface : EntryPointInterfaceBase {
  EntryPointInterface() {}

  ICIF *Create(Version_t version, ICIF *parent) const override {
    return CIF::InterfaceCreator<Interface>::template CreateInterfaceVer(version, version, parent);
  }

the template is causing an issue.

[eero-t]

It also fails to build with LLVM 20.

LLVM changes API on each release. AFAIK IGC currently is supposed to build with LLVM versions 11-15 (but not necessarily work fully with all of them). For details, see #289.

PS. There was projects page in this repo about support level of each LLVM version, but GitHub first deprecated & then removed the legacy projects feature (that's why you don't see this info under current projects link, that GH replaced it with).