About
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these are my depends:

// support link
https://sourceforge.net/p/scst/tickets/34/

// build depends
kernel-uek-5.4.17-2102.204.4.4.el8uek.x86_64
// stuck with below, can't remove it
kernel-headers-4.18.0-305.17.1.el8_4.x86_64
kernel-uek-devel-5.4.17-2102.204.4.4.el8uek.x86_64

[mockbuild@orc8mock ~]$ rpm -qa | grep elf
elfutils-libelf-devel-0.182-3.el8.x86_64

openssl
perl-devel
git
perl-ExtUtils-MakeMaker-7.34-1.el8.noarch

note:
the %_topdir is /builddir/scst/rpmbuilddir

// define the kernel versions in macros
[mockbuild@orc8mock ~]$ cat .rpmmacros 
%_topdir /builddir/build
%_rpmfilename %%{NAME}-%%{VERSION}-%%{RELEASE}.%%{ARCH}.rpm
%packager Mark Pryor <pryorm09@gmail.com>
%_buildhost oracle8
%_platform_multiplier 1
%dist .el8
%kernel_devel_rpm kernel-uek-devel
%kernel_rpm kernel-uek
%krpmver 5.4.17-2102.203.6.el8uek.x86_64

// 2 Makefile targets
BUILD_2X_MODULE=y CONFIG_SCSI_QLA_FC=y CONFIG_SCSI_QLA2XXX_TARGET=y make rpm
make scst-dkms-rpm

Author
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PryMar56
Sep 2021