Building the software

Software can be built either as RPM or DEB package. Two building scripts are provided:
./do-update-makerpm.sh and ./do-update-makedeb.sh which build RPM and DEB packages respectively

Please refer README-DEB for DEB build instructions

To build CPU-only package
	1. rm -rf <BUILD_DIR>
	2. ./do-update-makerpm.sh -S <SRC_DIR> -w <BUILD_DIR>
	Example:
		rm -rf ${PWD}/tmp; ./do-update-makerpm.sh -S ${PWD} -w ${PWD}/tmp

To build the GPU enabled version
	1. Export either of NVIDIA_GPU_DIRECT or INTEL_GPU_DIRECT, not both. Please read explanations below.
		(If both NVIDIA_GPU_DIRECT and INTEL_GPU_DIRECT are present in env, INTEL_GPU_DIRECT has priority.)
	2. rm -rf <BUILD_DIR>
	3. ./do-update-makerpm.sh -G -S <SRC_DIR> -w <BUILD_DIR>
	Example:
		export NVIDIA_GPU_DIRECT=/usr/src/nvidia-387.26; rm -rf ${PWD}/tmp; ./do-update-makerpm.sh -G -S ${PWD} -w ${PWD}/tmp


Before building the driver with CUDA support:

export NVIDIA_GPU_DIRECT=<path to driver>
Here is a list of common paths for NVIDIA_GPU_DIRECT:
  SLES15:      export NVIDIA_GPU_DIRECT=/usr/src/kernel-modules/nvidia-<version>-default
  RHEL7.9-8.X: export NVIDIA_GPU_DIRECT=/usr/src/nvidia-<version>
  RHEL9*:      export NVIDIA_GPU_DIRECT=/usr/src/nvidia-open-<version>
    NOTE: nvidia-open dkms driver is required for RHEL9+, refer to IEFS Documentation for more info.

Make sure "${NVIDIA_GPU_DIRECT}/Module.symvers" exists.
If the file does not exist, you must manually build it by running "make" in the directory.


Before building the driver with INTEL GPU support:

There are 2 possible cases for building with Intel GPU support: using an out-of-tree dmabuf
driver or using an in-tree (kernel) driver.

If you use the out-of-tree driver:
export INTEL_GPU_DIRECT=<path to DMA BUF driver>
Most commonly supported distros use the following path:
  export INTEL_GPU_DIRECT=/usr/src/intel-dmabuf-dkms-<version>
NOTE: Newer OS distros have sufficient kernel support already and do not require an out-of-tree dma buf driver.
      See IEFS and Intel GPU release notes for support information.

If you use the out-of-tree driver, make sure "${INTEL_GPU_DIRECT}/Module.symvers" and
 "${INTEL_GPU_DIRECT}/backport-include/backport/autoconf.h" exist.
If they do not exist in the correct locations, then you will need to build them using the following commands:
  export LEX=flex
  export YACC=bison
  cp defconfigs/dmabuf .config
  make -j KLIB=/lib/modules/$(uname -r) olddefconfig
  make -j KLIB=/lib/modules/$(uname -r)

If you use the in-tree (kernel) dma buf driver export a special value:
  export INTEL_GPU_DIRECT="CURRENT_KERNEL"


To support MLNX_OFED, download and install the latest MLNX_OFED for the distro on your machine.
Make sure to add the option "--add-kernel-support" to rebuild the package to the given kernel revison:
  ./mlnxofedinstall --add-kernel-support
Export the path to MLNX_OFED source directory:
  export MOFED_PATH=${MOFED_PATH:-/usr/src/ofa_kernel/x86_64/<version>}
Please refer to both IEFS and MOFED documentation for specific version and OS support combinations.


Once the SRC RPM is created, build the binary RPM from ./tmp/rpmbuild directory execute the following command

rpmbuild --rebuild --define "_topdir $(pwd)" --nodeps SRPMS/*.src.rpm