path: root/Software/Beignet/howto/oldgcc-howto.mdwn
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authorZhigang Gong <>2015-01-19 01:35:14 -0800
committerZhigang Gong <>2015-01-19 01:35:39 -0800
commit55a7173d1807b56e0498494cf823f82329303077 (patch)
tree47a377f2af270d94aa5cb14cbab9709357f8f256 /Software/Beignet/howto/oldgcc-howto.mdwn
parent7ab4f2bdd06ce85c06e6c18a67c128b191a12ff5 (diff)
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+Old Gcc Support HowTo
+Beignet GBE compiler requires C++11 features, while some platforms does not provide
+such with an old gcc version. The solution is to build a standalone GBE compiler in
+a feasible system, and then build Beignet with the pre-built standalone compiler.
+The standalone compiler is also needed during OpenCL application development. Here
+are the brief steps.
+Build standalone GBE compiler in a system supporting C++11 features
+The build process is as usual except to add a CMake option "-DBUILD_STANDALONE_GBE_COMPILER=true".
+After build finishes, there is a tar ball at your_build_dir/backend/src/libocl/usr/local/lib/beignet/gbecompiler.tgz,
+this is the standalone compiler package that will be used next.
+Distribute the package to your target system without C++11 features
+Copy gbecompiler.tgz into your target system, the preference location is /usr/local/lib/beignet,
+and unzip it.
+tar zxvf gbecompiler.tgz
+Please check there are following files and directory at /usr/local/lib/beignet/ after unzip:
+beignet.bc beignet.pch gbe_bin_generater include
+Build Beignet on your target system with the standalone compiler
+The build process is as usual except to add a CMake option "-DUSE_STANDALONE_GBE_COMPILER=true",
+If your_path_for_compiler is not /usr/local/lib/beignet, just need to add another CMake option
+Develop OpenCL applications on your target machine
+Firstly, write OpenCL kernel source code, secondly, compile the kernel source code to
+kernel binary with the standalone compiler gbe_bin_generater (see the usage below), finally,
+invoke clCreateProgramWithBinary to load the kernel binary and execute it. The utest case
+load_program_from_bin_file demos the whole procedure.
+gbe_bin_generater INFILE [-pbuild_parameter] -oOUTFILE -tGEN_PCI_ID
+For example, the following command builds OpenCL source kernel from file ''
+for Ivybridge with pci_id 0x0162, and write the result (executable binary kernel)
+into file 'mykernel.bin'.
+gbe_bin_generater -omykernel.bin -t0x0162
+If the standalone compiler is not located at /usr/local/lib/beignet, need to set the below
+environment to execute gbe_bin_generater.