Hello,
Do I need to initialize something or build the pocl in a specific manner. No, you don't need to do anything special with pocl. This problem is in fact not in pocl; the problem is that you have linked pocl against two different versions of libstdc++ (the standard C++ library). This usually happens when you compile pocl against LLVM downloaded from llvm.org, instead of using LLVM from your linux's package manager. There is a README.ARM file in pocl, i'm going to copypaste a part of it here: * get a clang / llvm. DO NOT use the ones downloaded from llvm.org, they only work on the distro where they were compiled. Ubuntu LTS these days ships multiple llvm versions even quite recent ones; get the clang+llvm from your distro's packages. For best experience on XU4, i recommend you use the Ubuntu 18.04 image from hardkernel, and then install clang+llvm 6 from the ubuntu repositories: "apt install llvm-6.0-dev llvm-6.0 clang-6.0 libclang-6.0-dev" If you want to use a different distribution, then you must install LLVM via their package manager, or compile it yourself (it's possible on XU4, but you may need to setup swap :) Regards, -- mb ________________________________ From: Srijeeta Maity <[email protected]> Sent: Saturday, September 22, 2018 9:11:43 AM To: [email protected] Subject: [pocl-devel] (no subject) Hello, I am trying to install pocl in Odroid-XU4 board. But After the installation when I am trying to run any opencl program I am getting segmentation fault. I am sharing the gdb error message - Starting program: /usr/bin/clinfo Cannot parse expression `.L1207 4@r4'. warning: Probes-based dynamic linker interface failed. Reverting to original interface. [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/arm-linux-gnueabihf/libthread_db.so.1". Number of platforms 1 Platform Name Portable Computing Language Platform Vendor The pocl project Platform Version OpenCL 1.2 pocl 1.3-pre RelWithDebInfo, LLVM 3.8.0, SLEEF, POCL_DEBUG, FP16 Platform Profile FULL_PROFILE Platform Extensions cl_khr_icd Platform Extensions function suffix POCL Program received signal SIGSEGV, Segmentation fault. 0xb55469f6 in std::error_category::equivalent(int, std::error_condition const&) const () from /usr/lib/arm-linux-gnueabihf/libstdc++.so.6 (gdb) bt #0 0xb55469f6 in std::error_category::equivalent(int, std::error_condition const&) const () from /usr/lib/arm-linux-gnueabihf/libstdc++.so.6 #1 0xb5565d00 in std::error_code::default_error_condition() const () from /usr/lib/arm-linux-gnueabihf/libstdc++.so.6 #2 0xb599c38a in pocl_mkdir_p ( path=path@entry=0xb6e8623c <cache_topdir> "/home/odroid/.cache/pocl/kcache") at /home/odroid/Tools/pocl-master/lib/llvmopencl/LLVMFileUtils.cc:144 #3 0xb598a1ca in pocl_cache_init_topdir () at /home/odroid/Tools/pocl-master/lib/CL/pocl_cache.c:538 #4 0xb598a998 in pocl_init_devices () at /home/odroid/Tools/pocl-master/lib/CL/devices/devices.c:466 #5 0xb597740c in POclGetDeviceIDs (platform=0xb6e84c4c <_platforms>, device_type=<optimized out>, num_entries=0, devices=0x0, num_devices=0x423978) at /home/odroid/Tools/pocl-master/lib/CL/clGetDeviceIDs.c:50 #6 0x00407c78 in ?? () Backtrace stopped: previous frame identical to this frame (corrupt stack?) I am stuck at this point for a long time. Do I need to initialize something or build the pocl in a specific manner. It will be great help if you can give some insights on it. Thanks and regards, Srijeeta
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