build_rovema_kernel.ksh (version 4, new worseisbetter attempt)
Posted by Anonymous on Tue 12th Dec 2023 17:06
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view followups (newest first): build_rovema_kernel.ksh (version 4, new worseisbetter attempt) by Anonymous

#!/bin/ksh93

#
# build_rovema_kernel.ksh
#
# Written by Roland Mainz <roland.mainz@nrubsig.org>
#

#
# build Linux kernel 6.6-RT15
#

function build_kernel
{
        set -o errexit
        set -o nounset

        # subshell so CWD remains unchanged on return
        (
                mkdir build_kernel

                cd build_kernel/
                git clone -b v6.6-rt15 git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git

                cd linux-rt-devel/
                cp ../../myconfig_linux_v6_6_rt15.config .config

                #
                # fixme: add patches here
                # - rt RCU patch
                # - default boot args patch
                # - i915 patches
                # - rt udev dir
                #

                time nice -n 19 ksh -c 'CC="gcc -m32" make -j2 bindeb-pkg 2>&1 | tee buildlog.log'

                cd ..

                cp linux-headers-*_i386.deb     "${c.dist_files_dir}/"
                cp linux-image-*_i386.deb       "${c.dist_files_dir}/"
                cp linux-libc-*_i386.deb        "${c.dist_files_dir}/"
        )

        print '# build_kernel OK'

        return 0
}


#
# build custom igb_avb module
#
function build_igbavb
{
        set -o errexit
        set -o nounset

        # subshell so CWD remains unchanged on return
        (
                mkdir build_igbavb
                cd build_igbavb/

                git clone https://github.com/Avnu/igb_avb.git

                cd igb_avb/

                # switch to commit 6c115ee89c88f6284d1407244b4a47586c3332d,
                # which is known to work with Linux 6.6-RT15
                git checkout '86c115ee89c88f6284d1407244b4a47586c3332d'

                #
                # apply patches
                #
                # fixme:
                # - pciid patch is missing
                # - igb patches may need backport (bfp ?)
                #
                git am <'../../0001-libigb-Use-PTHREAD_PRIO_INHERIT-for-mutex-to-avoid-r.patch'
                git am <'../../0002-Disable-pci_-_pcie_error_reporting-for-Linux-kernels.patch'

                #
                # build kernel module
                #
                cd kmod/
                CC="gcc -m32" make -j4 -C "$PWD/../../../build_kernel/linux-rt-devel/" KSRC="$PWD/../../../build_kernel/linux-rt-devel/" M=$PWD
                cp igb_avb.ko   "${c.dist_files_dir}/"
                cd ..

                #
                # build libigb.a
                #
                cd lib
                CC="gcc -m32" make all

                #
                # build shared library vesion of libigb.a
                #
                gcc -m32 -shared -fPIC -o libigb.so -Wl,--whole-archive libigb.a -Wl,--no-whole-archive -lpthread
                cp libigb.so    "${c.dist_files_dir}/"
        )

        print '# build_igbavb OK'

        return 0
}

#
# main
#

# use ksh93 builtins
export PATH="/opt/ast/bin/:/usr/ast/bin:$PATH"
builtin mkdir

# keep all global script data in a compound variable
# so we can use $ print -u2 -v c # for debugging
compound c

typeset c.dist_files_dir="$PWD/dist_files"
mkdir -p "${c.dist_files_dir}"


build_kernel
build_igbavb

ls -l "${c.dist_files_dir}"

# EOF.