Build issues: Error! Loading of FCL library has failed! Filename: libigdfcl.so.1 #682
Description
[ 59%] Generating ../../../../bin/built_ins/x64/spirv/fill_image3d.spv
Error! Loading of FCL library has failed! Filename: libigdfcl.so.1
Error! FCL initialization failure. Error code = -6
Command was: /home/pvelesko/intel-compute-runtime-build/neo/build/bin/ocloc -q -spv_only -file /home/pvelesko/intel-compute-runtime-build/neo/shared/source/built_ins/kernels/fill_image3d.builtin_kernel -out_dir /home/pvelesko/intel-compute-runtime-build/neo/build/bin/built_ins/x64/spirv/ -output_no_suffix -options "-cl-kernel-arg-info"
make[2]: *** [shared/source/built_ins/kernels/CMakeFiles/builtins_spirv.dir/build.make:220: bin/built_ins/x64/spirv/fill_image3d.spv] Error 250
make[1]: *** [CMakeFiles/Makefile2:38628: shared/source/built_ins/kernels/CMakeFiles/builtins_spirv.dir/all] Error 2
make: *** [Makefile:156: all] Error 2
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JablonskiMateusz commentedon Oct 5, 2023
Hi @pvelesko
it seems you have no igc installed on the system. You need IGC/GMM/Level zero dependencies based on release notes
pvelesko commentedon Oct 5, 2023
This is part of my install script: https://github.com/pvelesko/intel-compute-runtime-build @JablonskiMateusz
I guess I'm missing -DIGC_DIR=?
JablonskiMateusz commentedon Oct 6, 2023
I'm not expert in building from source but I hope that if you build and install IGC, you should have both libigc and libigdfcl libraries installed on the system
pvelesko commentedon Oct 6, 2023
I'm trying to install it on a shared system where I don't have root
JablonskiMateusz commentedon Oct 12, 2023
you could try to build igc packages and then extract them to location where you have access and then somehow point them so pkg-config finds it on cmake generation when building neo
pvelesko commentedon Oct 12, 2023
Specifying
-DIGC_DIR=solves the issue.pvelesko commentedon Oct 12, 2023
After install, level zero doesn't detect a device. Are the any debug options to check if the kernel space driver installed works for the neo release? @JablonskiMateusz
pvelesko commentedon Jan 5, 2024
This issue is still persistent when trying to build on another system.
I can see this library exists
Trying to run the command by itself:
But I know that this library has already been built in the
neo/build:so let's
LD_LIBRARY_PATHthen I checked
make VERBOSE=1and found that LD_LIBRARY_PATH is explicitly overridden by CMake:finally,
stracepvelesko commentedon Jan 16, 2024
@JablonskiMateusz ping @pengtu
pvelesko commentedon Jan 17, 2024
I see a similar issue has been open since 2020
#265
pvelesko commentedon Jan 18, 2024
I was ultimately able to resolve the issue.. Turns out that LLVM must use static linking!... I'll keep this issue open until this is either fixed or documentation is updated to reflect this requirement. @JablonskiMateusz @pengtu
libmld-dev commentedon Jan 25, 2024
I had a similar issue with the same error. My problem was, that the FCL Library was using the SPIRV-LLVM-Translator for llvm13.
In the igc build description the package libllvmspirvlib-dev is suggested to be installed.
However, on Ubuntu 22.04.3 this will install libllvmspirvlib13, which wont work if you build with prebuild llvm14. The fix was installing libllvmspirvlib-14-dev instead.
pvelesko commentedon Jan 25, 2024
I ran into similar issues as yours as well so I ended up compiling everything from source @libmld-dev but that revealed the issue described here.
10 remaining items
chsasank commentedon Feb 25, 2024
The error image itself is actually coming from this repo. See this line:
compute-runtime/shared/offline_compiler/source/offline_compiler.cpp
Line 692 in 3341de7
chsasank commentedon Feb 25, 2024
I don't think this error is related to LLVM static linking. Seems to be a dependency issue.
pvelesko commentedon Feb 25, 2024
I've probably spent over 20 hours trying to build this thing and switching to static linking LLVM was what made it work. Perhaps you can try building via the script that I sent?
pvelesko commentedon Mar 6, 2024
@chsasank any luck?
chsasank commentedon Mar 6, 2024
I have stopped working on this for the time being. Will report to you if I succeed later.
psteinbrecher commentedon Oct 8, 2024
@JablonskiMateusz, the bug is here:
compute-runtime/cmake/ocloc_cmd_prefix.cmake
Line 11 in a111c18
and here:
compute-runtime/cmake/ocloc_cmd_prefix.cmake
Line 13 in a111c18
Need to use $ENV{...variable...} inside cmake to get the value of an env var:
LD_LIBRARY_PATH=$ENV{LD_LIBRARY_PATH}:${NEO__IGC_LIBRARY_PATH}
After this change the error:
Error! Loading of FCL library has failed! Filename: libigdfcl.so.1
Error! FCL initialization failure. Error code = -6
Build failed with error code: -6
goes away. The problem is that without $ENV we are just getting an empty string, hence removing all the libs in LD_LIBRARY_PATH. See verbose log:
cd /home/user/work/build_neo/compute-runtime/shared/source/built_ins/kernels && /home/user/work/CMake/build/install/bin/cmake -E env LD_LIBRARY_PATH=:/home/user/work/build_neo/build/bin /home/user/work/build_neo/build/bin/ocloc -q -spv_only -file /home/user/work/build_neo/compute-runtime/shared/source/built_ins/kernels/fill_image3d.builtin_kernel -out_dir /home/user/work/build_neo/build/bin/built_ins/x64/spirv/ -output_no_suffix -options -cl-kernel-arg-info
Error! Loading of FCL library has failed! Filename: libigdfcl.so.1
Error! FCL initialization failure. Error code = -6
Build failed with error code: -6
build: correct setting LD_LIBRARY_PATH in ocloc_cmd_prefix
JablonskiMateusz commentedon Jul 24, 2025
@psteinbrecher
I corrected the logic in 6a572cd
kgibala commentedon Sep 11, 2025
@pvelesko is this issue resolved and can it be closed?
psteinbrecher commentedon Sep 11, 2025
Yes, the above fix is resolving this issue.