File PKGBUILD of Package linux-clear-ltscurrent

# Maintainer: Josip Ponjavic <josipponjavic at gmail dot com>
# Contributor:

### BUILD OPTIONS
# Set the next two variables to ANYTHING that is not null to enable them

# Tweak kernel options prior to a build via nconfig
_makenconfig=

# Only compile active modules to VASTLY reduce the number of modules built and
# the build time.
#
# To keep track of which modules are needed for your specific system/hardware,
# give module_db a try: https://aur.archlinux.org/packages/modprobed-db
# This PKGBUILD reads the database kept if it exists
#
# More at this wiki page ---> https://wiki.archlinux.org/index.php/Modprobed-db
_localmodcfg=

# Use the current kernel's .config file
# Enabling this option will use the .config of the RUNNING kernel rather than
# the ARCH defaults. Useful when the package gets updated and you already went
# through the trouble of customizing your config options.  NOT recommended when
# a new kernel is released, but again, convenient for package bumps.
_use_current=

# Enable compiling with LLVM
_use_llvm_lto=

# Enable/Disable debug options
# Set 'y' to enable, 'n' to force disable debug options if already enabled in your
# .config file or leave empty to ignore debug options.
_debug=

### IMPORTANT: Do no edit below this line unless you know what you're doing

_major=6.12
_minor=37
_srcname=linux-${_major}
_clr=${_major}.36-1501
pkgbase=linux-clear-ltscurrent
pkgname=('linux-clear-ltscurrent' 'linux-clear-ltscurrent-headers')
pkgver=${_major}.${_minor}
pkgrel=1
pkgdesc='Clear Linux ltscurrent'
arch=('x86_64')
url="https://github.com/clearlinux-pkgs/linux-ltscurrent"
license=(GPL-2.0-only)
makedepends=(bc cpio gettext git libelf pahole perl python tar xz zstd)
if [ -n "$_use_llvm_lto" ]; then
    makedepends+=(clang llvm lld)
fi
options=(!debug !strip)
source=(
  "https://cdn.kernel.org/pub/linux/kernel/v6.x/linux-${_major}.tar.xz"
  "https://cdn.kernel.org/pub/linux/kernel/v6.x/patch-${pkgver}.xz"
  "https://github.com/clearlinux-pkgs/linux-ltscurrent/archive/${_clr}.tar.gz"
)

if [ -n "$_use_llvm_lto" ]; then
    BUILD_FLAGS=(
        LLVM=1
        LLVM_IAS=1
    )
fi

export KBUILD_BUILD_HOST=archlinux
export KBUILD_BUILD_USER=$pkgbase
export KBUILD_BUILD_TIMESTAMP="$(date -Ru${SOURCE_DATE_EPOCH:+d @$SOURCE_DATE_EPOCH})"
export KCFLAGS=' -march=x86-64-v3'
export KCPPFLAGS=' -march=x86-64-v3'

prepare() {
    cd ${_srcname}

    ### Add upstream patches
    echo "Add upstream patches"
    patch -Np1 -i ../patch-${pkgver}

    ### Setting version
    echo "Setting version..."
    echo "-$pkgrel" > localversion.10-pkgrel
    echo "${pkgbase#linux}" > localversion.20-pkgname

    ### Add Clearlinux patches and skip disabled ones
    ### check 'linux.spec' file for more info.
    for i in $(grep '^Patch' ${srcdir}/linux-ltscurrent-${_clr}/linux-ltscurrent.spec |\
     grep -Ev '^Patch0109|^Patch0113|^Patch0118|^Patch0125|^Patch0132|^Patch0138|^Patch0139|^Patch0147' | sed -n 's/.*: //p'); do
        echo "Applying patch ${i}..."
        patch -Np1 -i "$srcdir/linux-ltscurrent-${_clr}/${i}"
    done

    ### Setting config
    echo "Setting config..."
    cp -Tf $srcdir/linux-ltscurrent-${_clr}/config ./.config

    ### Enable extra options
    echo "Enable extra options..."

    # General setup
    scripts/config --set-str DEFAULT_HOSTNAME archlinux \
                   --enable IKCONFIG \
                   --enable IKCONFIG_PROC \
                   --undefine RT_GROUP_SCHED

    # Power management and ACPI options
    scripts/config --enable ACPI_REV_OVERRIDE_POSSIBLE \
                   --enable ACPI_TABLE_UPGRADE

    # CPU Frequency scaling
    scripts/config -e CPU_FREQ_GOV_POWERSAVE \
                   -e CPU_FREQ_GOV_USERSPACE \
                   -e CPU_FREQ_GOV_CONSERVATIVE

    # General architecture-dependent options
    scripts/config --enable KPROBES

    # Enable loadable module support
    scripts/config --undefine MODULE_SIG_FORCE

    # Networking support
    scripts/config --enable NETFILTER_INGRESS

    # Device Drivers
    scripts/config --enable FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER \
                   --enable DELL_SMBIOS_SMM \
                   --module PATA_JMICRON \
                   --enable-after SOUND SOUND_OSS_CORE \
                   --enable SND_OSSEMUL \
                   --module-after SND_OSSEMUL SND_MIXER_OSS \
                   --module-after SND_MIXER_OSS SND_PCM_OSS \
                   --enable-after SND_PCM_OSS SND_PCM_OSS_PLUGINS \
                   --module AGP --module-after AGP AGP_INTEL --module-after AGP_INTEL AGP_VIA

    # Kernel hacking -> Compile-time checks and compiler options -> Make section mismatch errors non-fatal
    scripts/config --enable SECTION_MISMATCH_WARN_ONLY

    # File systems
    scripts/config --module NTFS3_FS \
                   --enable NTFS3_LZX_XPRESS \
                   --enable NTFS3_FS_POSIX_ACL

    scripts/config --module SMB_SERVER \
                   --enable SMB_SERVER_SMBDIRECT \
                   --enable SMB_SERVER_CHECK_CAP_NET_ADMIN \
                   --enable SMB_SERVER_KERBEROS5

    # Security options
    scripts/config --enable SECURITY_SELINUX \
                   --enable SECURITY_SELINUX_BOOTPARAM \
                   --enable SECURITY_SMACK \
                   --enable SECURITY_SMACK_BRINGUP \
                   --enable SECURITY_SMACK_NETFILTER \
                   --enable SECURITY_SMACK_APPEND_SIGNALS \
                   --enable SECURITY_TOMOYO \
                   --enable SECURITY_APPARMOR \
                   --enable SECURITY_YAMA \
                   --enable SECURITY_LANDLOCK

    # update lsm list
    scripts/config --set-str LSM "landlock,yama,loadpin,safesetid,integrity"

    # Library routines
    scripts/config --keep-case --enable FONT_TER16x32

    if [ -n "$_use_llvm_lto" ]; then
        scripts/config --disable LTO_NONE \
                       --enable LTO \
                       --enable LTO_CLANG \
                       --enable ARCH_SUPPORTS_LTO_CLANG \
                       --enable ARCH_SUPPORTS_LTO_CLANG_THIN \
                       --enable HAS_LTO_CLANG \
                       --enable LTO_CLANG_THIN \
                       --enable HAVE_GCC_PLUGINS
    fi

    if [ "$_debug" == "y" ]; then
        scripts/config --enable DEBUG_INFO \
                       --enable DEBUG_INFO_BTF \
                       --enable DEBUG_INFO_DWARF4 \
                       --enable PAHOLE_HAS_SPLIT_BTF \
                       --enable DEBUG_INFO_BTF_MODULES
    elif [ "$_debug" == "n" ]; then
        scripts/config --disable DEBUG_INFO \
                       --disable DEBUG_INFO_BTF \
                       --disable DEBUG_INFO_DWARF4 \
                       --disable PAHOLE_HAS_SPLIT_BTF \
                       --disable DEBUG_INFO_BTF_MODULES
    fi

    make "${BUILD_FLAGS[*]}" olddefconfig
    diff -u $srcdir/linux-ltscurrent-${_clr}/config .config || :

    ### Optionally use running kernel's config
    # code originally by nous; http://aur.archlinux.org/packages.php?ID=40191
    if [ -n "$_use_current" ]; then
        if [[ -s /proc/config.gz ]]; then
            echo "Extracting config from /proc/config.gz..."
            # modprobe configs
            zcat /proc/config.gz > ./.config
        else
            warning "Your kernel was not compiled with IKCONFIG_PROC!"
            warning "You cannot read the current config!"
            warning "Aborting!"
            exit
        fi
    fi

    ### Optionally load needed modules for the make localmodconfig
    # See https://aur.archlinux.org/packages/modprobed-db
    if [ -n "$_localmodcfg" ]; then
        if [ -e $HOME/.config/modprobed.db ]; then
            echo "Running Steven Rostedt's make localmodconfig now"
            make "${BUILD_FLAGS[*]}" LSMOD=$HOME/.config/modprobed.db localmodconfig
        else
            echo "No modprobed.db data found"
            exit
        fi
    fi

    make "${BUILD_FLAGS[*]}" -s kernelrelease > version
    echo "Prepared $pkgbase version $(<version)"

    [[ -z "$_makenconfig" ]] || make "${BUILD_FLAGS[*]}" nconfig

    ### Save configuration for later reuse
    cp -Tf ./.config "${startdir}/config-${pkgver}-${pkgrel}${pkgbase#linux}"
}

build() {
    cd ${_srcname}
    make "${BUILD_FLAGS[*]}" -j8 all
}

package_linux-clear-ltscurrent() {
    pkgdesc="The $pkgdesc kernel and modules"
    depends=('coreutils' 'kmod' 'initramfs')
    optdepends=('wireless-regdb: to set the correct wireless channels of your country'
                'linux-firmware: firmware images needed for some devices'
                'modprobed-db: Keeps track of EVERY kernel module that has ever been probed - useful for those of us who make localmodconfig')
    provides=(VIRTUALBOX-GUEST-MODULES WIREGUARD-MODULE KSMBD-MODULE)
    install=linux.install

    cd $_srcname

    local modulesdir="$pkgdir/usr/lib/modules/$(<version)"

    echo "Installing boot image..."
    # systemd expects to find the kernel here to allow hibernation
    # https://github.com/systemd/systemd/commit/edda44605f06a41fb86b7ab8128dcf99161d2344
    install -Dm644 "$(make -s image_name)" "$modulesdir/vmlinuz"

    # Used by mkinitcpio to name the kernel
    echo "$pkgbase" | install -Dm644 /dev/stdin "$modulesdir/pkgbase"

    echo "Installing modules..."
    ZSTD_CLEVEL=19 make "${BUILD_FLAGS[*]}" INSTALL_MOD_PATH="$pkgdir/usr" INSTALL_MOD_STRIP=1 \
        DEPMOD=/doesnt/exist modules_install  # Suppress depmod

    # remove build link
    rm "$modulesdir"/build
}

package_linux-clear-ltscurrent-headers() {
    pkgdesc="Headers and scripts for building modules for the $pkgdesc kernel"
    depends=(pahole)

    cd ${_srcname}
    local builddir="$pkgdir/usr/lib/modules/$(<version)/build"

    echo "Installing build files..."
    install -Dt "$builddir" -m644 .config Makefile Module.symvers System.map \
        localversion.* version vmlinux
    install -Dt "$builddir/kernel" -m644 kernel/Makefile
    install -Dt "$builddir/arch/x86" -m644 arch/x86/Makefile
    cp -t "$builddir" -a scripts

    # required when STACK_VALIDATION is enabled
    install -Dt "$builddir/tools/objtool" tools/objtool/objtool

    # required when DEBUG_INFO_BTF_MODULES is enabled
    if [ -f tools/bpf/resolve_btfids/resolve_btfids ]; then
        install -Dt "$builddir/tools/bpf/resolve_btfids" tools/bpf/resolve_btfids/resolve_btfids
    fi

    echo "Installing headers..."
    cp -t "$builddir" -a include
    cp -t "$builddir/arch/x86" -a arch/x86/include
    install -Dt "$builddir/arch/x86/kernel" -m644 arch/x86/kernel/asm-offsets.s

    install -Dt "$builddir/drivers/md" -m644 drivers/md/*.h
    install -Dt "$builddir/net/mac80211" -m644 net/mac80211/*.h

    # https://bugs.archlinux.org/task/13146
    install -Dt "$builddir/drivers/media/i2c" -m644 drivers/media/i2c/msp3400-driver.h

    # https://bugs.archlinux.org/task/20402
    install -Dt "$builddir/drivers/media/usb/dvb-usb" -m644 drivers/media/usb/dvb-usb/*.h
    install -Dt "$builddir/drivers/media/dvb-frontends" -m644 drivers/media/dvb-frontends/*.h
    install -Dt "$builddir/drivers/media/tuners" -m644 drivers/media/tuners/*.h

    # https://bugs.archlinux.org/task/71392
    install -Dt "$builddir/drivers/iio/common/hid-sensors" -m644 drivers/iio/common/hid-sensors/*.h

    echo "Installing KConfig files..."
    find . -name 'Kconfig*' -exec install -Dm644 {} "$builddir/{}" \;

    echo "Removing unneeded architectures..."
    local arch
    for arch in "$builddir"/arch/*/; do
        [[ $arch = */x86/ ]] && continue
        echo "Removing $(basename "$arch")"
        rm -r "$arch"
    done

    echo "Removing documentation..."
    rm -r "$builddir/Documentation"

    echo "Removing broken symlinks..."
    find -L "$builddir" -type l -printf 'Removing %P\n' -delete

    echo "Removing loose objects..."
    find "$builddir" -type f -name '*.o' -printf 'Removing %P\n' -delete

    echo "Stripping build tools..."
    local file
    while read -rd '' file; do
        case "$(file -Sib "$file")" in
            application/x-sharedlib\;*)      # Libraries (.so)
                strip -v $STRIP_SHARED "$file" ;;
            application/x-archive\;*)        # Libraries (.a)
                strip -v $STRIP_STATIC "$file" ;;
            application/x-executable\;*)     # Binaries
                strip -v $STRIP_BINARIES "$file" ;;
            application/x-pie-executable\;*) # Relocatable binaries
                strip -v $STRIP_SHARED "$file" ;;
        esac
    done < <(find "$builddir" -type f -perm -u+x ! -name vmlinux -print0)

    echo "Stripping vmlinux..."
    strip -v $STRIP_STATIC "$builddir/vmlinux"

    echo "Adding symlink..."
    mkdir -p "$pkgdir/usr/src"
    ln -sr "$builddir" "$pkgdir/usr/src/$pkgbase"
}

sha256sums=('b1a2562be56e42afb3f8489d4c2a7ac472ac23098f1ef1c1e40da601f54625eb'
            '3133a250b2ecb3325959d409621d32085e1c8db2ac2a21f6b483e8df9aa2829a'
            'SKIP')