From f60816efb5e8bc13c6e8c2554151da2f5bfdb422 Mon Sep 17 00:00:00 2001
From: Peter Jung <admin@ptr1337.dev>
Date: Sat, 28 Feb 2026 18:22:48 +0100
Subject: [PATCH 1/7] PKGBUILD: add "clang" mode and rename _use_llvm_lto to
 _use_llvm

Add a new "clang" option to _use_llvm (formerly _use_llvm_lto) that
uses Clang as the compiler with LTO disabled. This is useful for
AutoFDO/Propeller profiling workflows and testing without the overhead
of LTO linking.

Signed-off-by: Peter Jung <admin@ptr1337.dev>
---
 linux-cachyos/PKGBUILD | 42 +++++++++++++++++++++++++-----------------
 1 file changed, 25 insertions(+), 17 deletions(-)

diff --git a/linux-cachyos/PKGBUILD b/linux-cachyos/PKGBUILD
index dd54590a2..bf4663744 100644
--- a/linux-cachyos/PKGBUILD
+++ b/linux-cachyos/PKGBUILD
@@ -86,13 +86,14 @@
 # - "generic" (kernel's default - to share the package between machines with different CPU µarch as long as they are x86-64)
 : "${_processor_opt:=}"
 
-# Clang LTO mode, only available with the "llvm" compiler - options are "none", "full" or "thin".
-# ATTENTION - one of three predefined values should be selected!
-# "full: uses 1 thread for Linking, slow and uses more memory, theoretically with the highest performance gains."
-# "thin: uses multiple threads, faster and uses less memory, may have a lower runtime performance than Full."
-# "thin-dist: Similar to thin, but uses a distributed model rather than in-process: https://discourse.llvm.org/t/rfc-distributed-thinlto-build-for-kernel/85934"
-# "none: disable LTO
-: "${_use_llvm_lto:=thin}"
+# Compiler and LTO selection - options are "none", "clang", "thin", "thin-dist" or "full".
+# ATTENTION - one of the predefined values should be selected!
+# "none": use GCC with LTO disabled.
+# "clang": use Clang as compiler but with LTO disabled.
+# "thin": use Clang with ThinLTO - multiple threads, faster and uses less memory, may have a lower runtime performance than Full.
+# "thin-dist": use Clang with distributed ThinLTO - https://discourse.llvm.org/t/rfc-distributed-thinlto-build-for-kernel/85934
+# "full": use Clang with Full LTO - 1 thread for Linking, slow and uses more memory, theoretically with the highest performance gains.
+: "${_use_llvm:=thin}"
 
 # Use suffix -lto only when requested by the user
 # yes - enable -lto suffix
@@ -156,7 +157,12 @@
 
 # ATTENTION: Do not modify after this line
 _is_lto_kernel() {
-    [[ "$_use_llvm_lto" = "thin" || "$_use_llvm_lto" = "full"  || "$_use_llvm_lto" = "thin-dist" ]]
+    [[ "$_use_llvm" = "thin" || "$_use_llvm" = "full"  || "$_use_llvm" = "thin-dist" ]]
+    return $?
+}
+
+_is_clang_build() {
+    _is_lto_kernel || [[ "$_use_llvm" = "clang" ]]
     return $?
 }
 
@@ -167,7 +173,7 @@ _is_ci_build() {
 
 if _is_lto_kernel && [ "$_use_lto_suffix" = "yes"  ]; then
     _pkgsuffix=cachyos-lto
-elif ! _is_lto_kernel && [ "$_use_gcc_suffix" = "yes" ]; then
+elif ! _is_clang_build && [ "$_use_gcc_suffix" = "yes" ]; then
     _pkgsuffix=cachyos-gcc
 else
     _pkgsuffix=cachyos
@@ -225,7 +231,7 @@ validpgpkeys=(
 )
 
 # LLVM makedepends
-if _is_lto_kernel; then
+if _is_clang_build; then
     makedepends+=(clang llvm lld)
     source+=("${_patchsource}/misc/dkms-clang.patch")
     BUILD_FLAGS=(
@@ -354,18 +360,18 @@ prepare() {
     fi
 
     ### Select LLVM level
-    case "$_use_llvm_lto" in
+    case "$_use_llvm" in
         thin) scripts/config -e LTO_CLANG_THIN;;
         thin-dist) scripts/config -e LTO_CLANG_THIN_DIST;;
         full) scripts/config -e LTO_CLANG_FULL;;
-        none) scripts/config -e LTO_NONE;;
-        *) _die "The value '$_use_llvm_lto' is invalid. Choose the correct one again.";;
+        clang|none) scripts/config -e LTO_NONE;;
+        *) _die "The value '$_use_llvm' is invalid. Choose the correct one again.";;
     esac
 
-    echo "Selecting '$_use_llvm_lto' LLVM level..."
+    echo "Selecting '$_use_llvm' LLVM level..."
 
     if ! _is_lto_kernel; then
-        echo "Enabling QR Code Panic for GCC Kernels"
+        echo "Enabling QR Code Panic for non-LTO Kernels"
         scripts/config --set-str DRM_PANIC_SCREEN qr_code -e DRM_PANIC_SCREEN_QR_CODE \
             --set-str DRM_PANIC_SCREEN_QR_CODE_URL https://panic.archlinux.org/panic_report# \
             --set-val CONFIG_DRM_PANIC_SCREEN_QR_VERSION 40
@@ -533,7 +539,7 @@ _sign_modules() {
     local sign_cert="${srcdir}/${_srcname}/certs/signing_key.x509"
     local hash_algo="$(grep -Po 'CONFIG_MODULE_SIG_HASH="\K[^"]*' "${srcdir}/${_srcname}/.config")"
 
-    if [ "$_use_llvm_lto" != "none" ]; then
+    if [ "$_use_llvm" != "none" ]; then
         local strip_bin="llvm-strip"
     else
         local strip_bin="strip"
@@ -569,7 +575,7 @@ build() {
         cd ${srcdir}/"zfs"
 
         local CONFIGURE_FLAGS=()
-        [ "$_use_llvm_lto" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        [ "$_use_llvm" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
 
         ./autogen.sh
         sed -i "s|\$(uname -r)|${_kernuname}|g" configure
@@ -638,6 +644,8 @@ _package-headers() {
     if _is_lto_kernel; then
         provides+=(linux-cachyos-lto-headers=$_kernver)
         replaces=(linux-cachyos-lto-headers)
+    fi
+    if _is_clang_build; then
         depends+=(clang llvm lld)
     fi
 

From 68f9cf905897e2d7aafc505f8d2f6c90afada5c8 Mon Sep 17 00:00:00 2001
From: Peter Jung <admin@ptr1337.dev>
Date: Sun, 16 Aug 2026 16:59:57 +0200
Subject: [PATCH 2/7] PKGBUILD: add clang mode to non-LTS variants

---
 linux-cachyos-bmq/PKGBUILD      | 44 ++++++++++++++++++++-------------
 linux-cachyos-bore/PKGBUILD     | 44 ++++++++++++++++++++-------------
 linux-cachyos-deckify/PKGBUILD  | 44 ++++++++++++++++++++-------------
 linux-cachyos-eevdf/PKGBUILD    | 44 ++++++++++++++++++++-------------
 linux-cachyos-hardened/PKGBUILD | 44 ++++++++++++++++++++-------------
 linux-cachyos-rc/PKGBUILD       | 42 +++++++++++++++++--------------
 linux-cachyos-rt-bore/PKGBUILD  | 44 ++++++++++++++++++++-------------
 linux-cachyos-server/PKGBUILD   | 44 ++++++++++++++++++++-------------
 8 files changed, 213 insertions(+), 137 deletions(-)

diff --git a/linux-cachyos-bmq/PKGBUILD b/linux-cachyos-bmq/PKGBUILD
index f6ca202d0..60ee1f7c2 100644
--- a/linux-cachyos-bmq/PKGBUILD
+++ b/linux-cachyos-bmq/PKGBUILD
@@ -86,13 +86,14 @@
 # - "generic" (kernel's default - to share the package between machines with different CPU µarch as long as they are x86-64)
 : "${_processor_opt:=}"
 
-# Clang LTO mode, only available with the "llvm" compiler - options are "none", "full" or "thin".
-# ATTENTION - one of three predefined values should be selected!
-# "full: uses 1 thread for Linking, slow and uses more memory, theoretically with the highest performance gains."
-# "thin: uses multiple threads, faster and uses less memory, may have a lower runtime performance than Full."
-# "thin-dist: Similar to thin, but uses a distributed model rather than in-process: https://discourse.llvm.org/t/rfc-distributed-thinlto-build-for-kernel/85934"
-# "none: disable LTO
-: "${_use_llvm_lto:=none}"
+# Compiler and LTO selection - options are "none", "clang", "thin", "thin-dist" or "full".
+# ATTENTION - one of the predefined values should be selected!
+# "none": use GCC with LTO disabled.
+# "clang": use Clang as compiler but with LTO disabled.
+# "thin": use Clang with ThinLTO - multiple threads, faster and uses less memory, may have a lower runtime performance than Full.
+# "thin-dist": use Clang with distributed ThinLTO - https://discourse.llvm.org/t/rfc-distributed-thinlto-build-for-kernel/85934
+# "full": use Clang with Full LTO - 1 thread for Linking, slow and uses more memory, theoretically with the highest performance gains.
+: "${_use_llvm:=none}"
 
 # Use suffix -lto only when requested by the user
 # Enabled by default.
@@ -131,7 +132,12 @@
 
 # ATTENTION: Do not modify after this line
 _is_lto_kernel() {
-    [[ "$_use_llvm_lto" = "thin" || "$_use_llvm_lto" = "full"  || "$_use_llvm_lto" = "thin-dist" ]]
+    [[ "$_use_llvm" = "thin" || "$_use_llvm" = "full"  || "$_use_llvm" = "thin-dist" ]]
+    return $?
+}
+
+_is_clang_build() {
+    _is_lto_kernel || [[ "$_use_llvm" = "clang" ]]
     return $?
 }
 
@@ -142,7 +148,7 @@ _is_ci_build() {
 
 if _is_lto_kernel && [ "$_use_lto_suffix" = "yes"  ]; then
     _pkgsuffix="cachyos-${_cpusched}-lto"
-elif ! _is_lto_kernel && [ "$_use_gcc_suffix" = "yes" ]; then
+elif ! _is_clang_build && [ "$_use_gcc_suffix" = "yes" ]; then
     _pkgsuffix="cachyos-${_cpusched}-gcc"
 else
     _pkgsuffix="cachyos-${_cpusched}"
@@ -200,7 +206,7 @@ validpgpkeys=(
 )
 
 # LLVM makedepends
-if _is_lto_kernel; then
+if _is_clang_build; then
     makedepends+=(clang llvm lld)
     source+=("${_patchsource}/misc/dkms-clang.patch")
     BUILD_FLAGS=(
@@ -314,18 +320,18 @@ prepare() {
     fi
 
     ### Select LLVM level
-    case "$_use_llvm_lto" in
+    case "$_use_llvm" in
         thin) scripts/config -e LTO_CLANG_THIN;;
         thin-dist) scripts/config -e LTO_CLANG_THIN_DIST;;
         full) scripts/config -e LTO_CLANG_FULL;;
-        none) scripts/config -e LTO_NONE;;
-        *) _die "The value '$_use_llvm_lto' is invalid. Choose the correct one again.";;
+        clang|none) scripts/config -e LTO_NONE;;
+        *) _die "The value '$_use_llvm' is invalid. Choose the correct one again.";;
     esac
 
-    echo "Selecting '$_use_llvm_lto' LLVM level..."
+    echo "Selecting '$_use_llvm' LLVM level..."
 
     if ! _is_lto_kernel; then
-        echo "Enabling QR Code Panic for GCC Kernels"
+        echo "Enabling QR Code Panic for non-LTO Kernels"
         scripts/config --set-str DRM_PANIC_SCREEN qr_code -e DRM_PANIC_SCREEN_QR_CODE \
             --set-str DRM_PANIC_SCREEN_QR_CODE_URL https://panic.archlinux.org/panic_report# \
             --set-val CONFIG_DRM_PANIC_SCREEN_QR_VERSION 40
@@ -472,7 +478,7 @@ _sign_modules() {
     local sign_cert="${srcdir}/${_srcname}/certs/signing_key.x509"
     local hash_algo="$(grep -Po 'CONFIG_MODULE_SIG_HASH="\K[^"]*' "${srcdir}/${_srcname}/.config")"
 
-    if [ "$_use_llvm_lto" != "none" ]; then
+    if [ "$_use_llvm" != "none" ]; then
         local strip_bin="llvm-strip"
     else
         local strip_bin="strip"
@@ -508,7 +514,7 @@ build() {
         cd ${srcdir}/"zfs"
 
         local CONFIGURE_FLAGS=()
-        [ "$_use_llvm_lto" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        [ "$_use_llvm" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
 
         ./autogen.sh
         sed -i "s|\$(uname -r)|${_kernuname}|g" configure
@@ -569,6 +575,10 @@ _package-headers() {
      "${pkgbase}")
     provides=(LINUX-HEADERS)
 
+    if _is_clang_build; then
+        depends+=(clang llvm lld)
+    fi
+
     cd "${_srcname}"
     local builddir="$pkgdir/usr/lib/modules/$(<version)/build"
 
diff --git a/linux-cachyos-bore/PKGBUILD b/linux-cachyos-bore/PKGBUILD
index deeeaba62..e0346daaf 100644
--- a/linux-cachyos-bore/PKGBUILD
+++ b/linux-cachyos-bore/PKGBUILD
@@ -86,13 +86,14 @@
 # - "generic" (kernel's default - to share the package between machines with different CPU µarch as long as they are x86-64)
 : "${_processor_opt:=}"
 
-# Clang LTO mode, only available with the "llvm" compiler - options are "none", "full" or "thin".
-# ATTENTION - one of three predefined values should be selected!
-# "full: uses 1 thread for Linking, slow and uses more memory, theoretically with the highest performance gains."
-# "thin: uses multiple threads, faster and uses less memory, may have a lower runtime performance than Full."
-# "thin-dist: Similar to thin, but uses a distributed model rather than in-process: https://discourse.llvm.org/t/rfc-distributed-thinlto-build-for-kernel/85934"
-# "none: disable LTO
-: "${_use_llvm_lto:=none}"
+# Compiler and LTO selection - options are "none", "clang", "thin", "thin-dist" or "full".
+# ATTENTION - one of the predefined values should be selected!
+# "none": use GCC with LTO disabled.
+# "clang": use Clang as compiler but with LTO disabled.
+# "thin": use Clang with ThinLTO - multiple threads, faster and uses less memory, may have a lower runtime performance than Full.
+# "thin-dist": use Clang with distributed ThinLTO - https://discourse.llvm.org/t/rfc-distributed-thinlto-build-for-kernel/85934
+# "full": use Clang with Full LTO - 1 thread for Linking, slow and uses more memory, theoretically with the highest performance gains.
+: "${_use_llvm:=none}"
 
 # Use suffix -lto only when requested by the user
 # Enabled by default.
@@ -131,7 +132,12 @@
 
 # ATTENTION: Do not modify after this line
 _is_lto_kernel() {
-    [[ "$_use_llvm_lto" = "thin" || "$_use_llvm_lto" = "full"  || "$_use_llvm_lto" = "thin-dist" ]]
+    [[ "$_use_llvm" = "thin" || "$_use_llvm" = "full"  || "$_use_llvm" = "thin-dist" ]]
+    return $?
+}
+
+_is_clang_build() {
+    _is_lto_kernel || [[ "$_use_llvm" = "clang" ]]
     return $?
 }
 
@@ -142,7 +148,7 @@ _is_ci_build() {
 
 if _is_lto_kernel && [ "$_use_lto_suffix" = "yes"  ]; then
     _pkgsuffix="cachyos-${_cpusched}-lto"
-elif ! _is_lto_kernel && [ "$_use_gcc_suffix" = "yes" ]; then
+elif ! _is_clang_build && [ "$_use_gcc_suffix" = "yes" ]; then
     _pkgsuffix="cachyos-${_cpusched}-gcc"
 else
     _pkgsuffix="cachyos-${_cpusched}"
@@ -200,7 +206,7 @@ validpgpkeys=(
 )
 
 # LLVM makedepends
-if _is_lto_kernel; then
+if _is_clang_build; then
     makedepends+=(clang llvm lld)
     source+=("${_patchsource}/misc/dkms-clang.patch")
     BUILD_FLAGS=(
@@ -314,18 +320,18 @@ prepare() {
     fi
 
     ### Select LLVM level
-    case "$_use_llvm_lto" in
+    case "$_use_llvm" in
         thin) scripts/config -e LTO_CLANG_THIN;;
         thin-dist) scripts/config -e LTO_CLANG_THIN_DIST;;
         full) scripts/config -e LTO_CLANG_FULL;;
-        none) scripts/config -e LTO_NONE;;
-        *) _die "The value '$_use_llvm_lto' is invalid. Choose the correct one again.";;
+        clang|none) scripts/config -e LTO_NONE;;
+        *) _die "The value '$_use_llvm' is invalid. Choose the correct one again.";;
     esac
 
-    echo "Selecting '$_use_llvm_lto' LLVM level..."
+    echo "Selecting '$_use_llvm' LLVM level..."
 
     if ! _is_lto_kernel; then
-        echo "Enabling QR Code Panic for GCC Kernels"
+        echo "Enabling QR Code Panic for non-LTO Kernels"
         scripts/config --set-str DRM_PANIC_SCREEN qr_code -e DRM_PANIC_SCREEN_QR_CODE \
             --set-str DRM_PANIC_SCREEN_QR_CODE_URL https://panic.archlinux.org/panic_report# \
             --set-val CONFIG_DRM_PANIC_SCREEN_QR_VERSION 40
@@ -472,7 +478,7 @@ _sign_modules() {
     local sign_cert="${srcdir}/${_srcname}/certs/signing_key.x509"
     local hash_algo="$(grep -Po 'CONFIG_MODULE_SIG_HASH="\K[^"]*' "${srcdir}/${_srcname}/.config")"
 
-    if [ "$_use_llvm_lto" != "none" ]; then
+    if [ "$_use_llvm" != "none" ]; then
         local strip_bin="llvm-strip"
     else
         local strip_bin="strip"
@@ -508,7 +514,7 @@ build() {
         cd ${srcdir}/"zfs"
 
         local CONFIGURE_FLAGS=()
-        [ "$_use_llvm_lto" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        [ "$_use_llvm" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
 
         ./autogen.sh
         sed -i "s|\$(uname -r)|${_kernuname}|g" configure
@@ -569,6 +575,10 @@ _package-headers() {
      "${pkgbase}")
     provides=(LINUX-HEADERS)
 
+    if _is_clang_build; then
+        depends+=(clang llvm lld)
+    fi
+
     cd "${_srcname}"
     local builddir="$pkgdir/usr/lib/modules/$(<version)/build"
 
diff --git a/linux-cachyos-deckify/PKGBUILD b/linux-cachyos-deckify/PKGBUILD
index c176a33cb..bf0d48aba 100644
--- a/linux-cachyos-deckify/PKGBUILD
+++ b/linux-cachyos-deckify/PKGBUILD
@@ -86,13 +86,14 @@
 # - "generic" (kernel's default - to share the package between machines with different CPU µarch as long as they are x86-64)
 : "${_processor_opt:=}"
 
-# Clang LTO mode, only available with the "llvm" compiler - options are "none", "full" or "thin".
-# ATTENTION - one of three predefined values should be selected!
-# "full: uses 1 thread for Linking, slow and uses more memory, theoretically with the highest performance gains."
-# "thin: uses multiple threads, faster and uses less memory, may have a lower runtime performance than Full."
-# "thin-dist: Similar to thin, but uses a distributed model rather than in-process: https://discourse.llvm.org/t/rfc-distributed-thinlto-build-for-kernel/85934"
-# "none: disable LTO
-: "${_use_llvm_lto:=none}"
+# Compiler and LTO selection - options are "none", "clang", "thin", "thin-dist" or "full".
+# ATTENTION - one of the predefined values should be selected!
+# "none": use GCC with LTO disabled.
+# "clang": use Clang as compiler but with LTO disabled.
+# "thin": use Clang with ThinLTO - multiple threads, faster and uses less memory, may have a lower runtime performance than Full.
+# "thin-dist": use Clang with distributed ThinLTO - https://discourse.llvm.org/t/rfc-distributed-thinlto-build-for-kernel/85934
+# "full": use Clang with Full LTO - 1 thread for Linking, slow and uses more memory, theoretically with the highest performance gains.
+: "${_use_llvm:=none}"
 
 # Use suffix -lto only when requested by the user
 # yes - enable -lto suffix
@@ -130,7 +131,12 @@
 
 # ATTENTION: Do not modify after this line
 _is_lto_kernel() {
-    [[ "$_use_llvm_lto" = "thin" || "$_use_llvm_lto" = "full"  || "$_use_llvm_lto" = "thin-dist" ]]
+    [[ "$_use_llvm" = "thin" || "$_use_llvm" = "full"  || "$_use_llvm" = "thin-dist" ]]
+    return $?
+}
+
+_is_clang_build() {
+    _is_lto_kernel || [[ "$_use_llvm" = "clang" ]]
     return $?
 }
 
@@ -141,7 +147,7 @@ _is_ci_build() {
 
 if _is_lto_kernel && [ "$_use_lto_suffix" = "yes"  ]; then
     _pkgsuffix="cachyos-deckify-lto"
-elif ! _is_lto_kernel && [ "$_use_gcc_suffix" = "yes" ]; then
+elif ! _is_clang_build && [ "$_use_gcc_suffix" = "yes" ]; then
     _pkgsuffix="cachyos-deckify-gcc"
 else
     _pkgsuffix="cachyos-deckify"
@@ -200,7 +206,7 @@ validpgpkeys=(
 )
 
 # LLVM makedepends
-if _is_lto_kernel; then
+if _is_clang_build; then
     makedepends+=(clang llvm lld)
     source+=("${_patchsource}/misc/dkms-clang.patch")
     BUILD_FLAGS=(
@@ -314,18 +320,18 @@ prepare() {
     fi
 
     ### Select LLVM level
-    case "$_use_llvm_lto" in
+    case "$_use_llvm" in
         thin) scripts/config -e LTO_CLANG_THIN;;
         thin-dist) scripts/config -e LTO_CLANG_THIN_DIST;;
         full) scripts/config -e LTO_CLANG_FULL;;
-        none) scripts/config -e LTO_NONE;;
-        *) _die "The value '$_use_llvm_lto' is invalid. Choose the correct one again.";;
+        clang|none) scripts/config -e LTO_NONE;;
+        *) _die "The value '$_use_llvm' is invalid. Choose the correct one again.";;
     esac
 
-    echo "Selecting '$_use_llvm_lto' LLVM level..."
+    echo "Selecting '$_use_llvm' LLVM level..."
 
     if ! _is_lto_kernel; then
-        echo "Enabling QR Code Panic for GCC Kernels"
+        echo "Enabling QR Code Panic for non-LTO Kernels"
         scripts/config --set-str DRM_PANIC_SCREEN qr_code -e DRM_PANIC_SCREEN_QR_CODE \
             --set-str DRM_PANIC_SCREEN_QR_CODE_URL https://panic.archlinux.org/panic_report# \
             --set-val CONFIG_DRM_PANIC_SCREEN_QR_VERSION 40
@@ -491,7 +497,7 @@ _sign_modules() {
     local sign_cert="${srcdir}/${_srcname}/certs/signing_key.x509"
     local hash_algo="$(grep -Po 'CONFIG_MODULE_SIG_HASH="\K[^"]*' "${srcdir}/${_srcname}/.config")"
 
-    if [ "$_use_llvm_lto" != "none" ]; then
+    if [ "$_use_llvm" != "none" ]; then
         local strip_bin="llvm-strip"
     else
         local strip_bin="strip"
@@ -527,7 +533,7 @@ build() {
         cd ${srcdir}/"zfs"
 
         local CONFIGURE_FLAGS=()
-        [ "$_use_llvm_lto" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        [ "$_use_llvm" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
 
         ./autogen.sh
         sed -i "s|\$(uname -r)|${_kernuname}|g" configure
@@ -588,6 +594,10 @@ _package-headers() {
      "${pkgbase}")
     provides=(LINUX-HEADERS)
 
+    if _is_clang_build; then
+        depends+=(clang llvm lld)
+    fi
+
     cd "${_srcname}"
     local builddir="$pkgdir/usr/lib/modules/$(<version)/build"
 
diff --git a/linux-cachyos-eevdf/PKGBUILD b/linux-cachyos-eevdf/PKGBUILD
index a5943ff29..bd2be4ec4 100644
--- a/linux-cachyos-eevdf/PKGBUILD
+++ b/linux-cachyos-eevdf/PKGBUILD
@@ -86,13 +86,14 @@
 # - "generic" (kernel's default - to share the package between machines with different CPU µarch as long as they are x86-64)
 : "${_processor_opt:=}"
 
-# Clang LTO mode, only available with the "llvm" compiler - options are "none", "full" or "thin".
-# ATTENTION - one of three predefined values should be selected!
-# "full: uses 1 thread for Linking, slow and uses more memory, theoretically with the highest performance gains."
-# "thin: uses multiple threads, faster and uses less memory, may have a lower runtime performance than Full."
-# "thin-dist: Similar to thin, but uses a distributed model rather than in-process: https://discourse.llvm.org/t/rfc-distributed-thinlto-build-for-kernel/85934"
-# "none: disable LTO
-: "${_use_llvm_lto:=none}"
+# Compiler and LTO selection - options are "none", "clang", "thin", "thin-dist" or "full".
+# ATTENTION - one of the predefined values should be selected!
+# "none": use GCC with LTO disabled.
+# "clang": use Clang as compiler but with LTO disabled.
+# "thin": use Clang with ThinLTO - multiple threads, faster and uses less memory, may have a lower runtime performance than Full.
+# "thin-dist": use Clang with distributed ThinLTO - https://discourse.llvm.org/t/rfc-distributed-thinlto-build-for-kernel/85934
+# "full": use Clang with Full LTO - 1 thread for Linking, slow and uses more memory, theoretically with the highest performance gains.
+: "${_use_llvm:=none}"
 
 # Use suffix -lto only when requested by the user
 # Enabled by default.
@@ -131,7 +132,12 @@
 
 # ATTENTION: Do not modify after this line
 _is_lto_kernel() {
-    [[ "$_use_llvm_lto" = "thin" || "$_use_llvm_lto" = "full"  || "$_use_llvm_lto" = "thin-dist" ]]
+    [[ "$_use_llvm" = "thin" || "$_use_llvm" = "full"  || "$_use_llvm" = "thin-dist" ]]
+    return $?
+}
+
+_is_clang_build() {
+    _is_lto_kernel || [[ "$_use_llvm" = "clang" ]]
     return $?
 }
 
@@ -142,7 +148,7 @@ _is_ci_build() {
 
 if _is_lto_kernel && [ "$_use_lto_suffix" = "yes"  ]; then
     _pkgsuffix="cachyos-${_cpusched}-lto"
-elif ! _is_lto_kernel && [ "$_use_gcc_suffix" = "yes" ]; then
+elif ! _is_clang_build && [ "$_use_gcc_suffix" = "yes" ]; then
     _pkgsuffix="cachyos-${_cpusched}-gcc"
 else
     _pkgsuffix="cachyos-${_cpusched}"
@@ -203,7 +209,7 @@ validpgpkeys=(
 )
 
 # LLVM makedepends
-if _is_lto_kernel; then
+if _is_clang_build; then
     makedepends+=(clang llvm lld)
     source+=("${_patchsource}/misc/dkms-clang.patch")
     BUILD_FLAGS=(
@@ -317,18 +323,18 @@ prepare() {
     fi
 
     ### Select LLVM level
-    case "$_use_llvm_lto" in
+    case "$_use_llvm" in
         thin) scripts/config -e LTO_CLANG_THIN;;
         thin-dist) scripts/config -e LTO_CLANG_THIN_DIST;;
         full) scripts/config -e LTO_CLANG_FULL;;
-        none) scripts/config -e LTO_NONE;;
-        *) _die "The value '$_use_llvm_lto' is invalid. Choose the correct one again.";;
+        clang|none) scripts/config -e LTO_NONE;;
+        *) _die "The value '$_use_llvm' is invalid. Choose the correct one again.";;
     esac
 
-    echo "Selecting '$_use_llvm_lto' LLVM level..."
+    echo "Selecting '$_use_llvm' LLVM level..."
 
     if ! _is_lto_kernel; then
-        echo "Enabling QR Code Panic for GCC Kernels"
+        echo "Enabling QR Code Panic for non-LTO Kernels"
         scripts/config --set-str DRM_PANIC_SCREEN qr_code -e DRM_PANIC_SCREEN_QR_CODE \
             --set-str DRM_PANIC_SCREEN_QR_CODE_URL https://panic.archlinux.org/panic_report# \
             --set-val CONFIG_DRM_PANIC_SCREEN_QR_VERSION 40
@@ -475,7 +481,7 @@ _sign_modules() {
     local sign_cert="${srcdir}/${_srcname}/certs/signing_key.x509"
     local hash_algo="$(grep -Po 'CONFIG_MODULE_SIG_HASH="\K[^"]*' "${srcdir}/${_srcname}/.config")"
 
-    if [ "$_use_llvm_lto" != "none" ]; then
+    if [ "$_use_llvm" != "none" ]; then
         local strip_bin="llvm-strip"
     else
         local strip_bin="strip"
@@ -511,7 +517,7 @@ build() {
         cd ${srcdir}/"zfs"
 
         local CONFIGURE_FLAGS=()
-        [ "$_use_llvm_lto" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        [ "$_use_llvm" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
 
         ./autogen.sh
         sed -i "s|\$(uname -r)|${_kernuname}|g" configure
@@ -572,6 +578,10 @@ _package-headers() {
      "${pkgbase}")
     provides=(LINUX-HEADERS)
 
+    if _is_clang_build; then
+        depends+=(clang llvm lld)
+    fi
+
     cd "${_srcname}"
     local builddir="$pkgdir/usr/lib/modules/$(<version)/build"
 
diff --git a/linux-cachyos-hardened/PKGBUILD b/linux-cachyos-hardened/PKGBUILD
index 3bad685d0..fe78c47bc 100644
--- a/linux-cachyos-hardened/PKGBUILD
+++ b/linux-cachyos-hardened/PKGBUILD
@@ -86,13 +86,14 @@
 # - "generic" (kernel's default - to share the package between machines with different CPU µarch as long as they are x86-64)
 : "${_processor_opt:=}"
 
-# Clang LTO mode, only available with the "llvm" compiler - options are "none", "full" or "thin".
-# ATTENTION - one of three predefined values should be selected!
-# "full: uses 1 thread for Linking, slow and uses more memory, theoretically with the highest performance gains."
-# "thin: uses multiple threads, faster and uses less memory, may have a lower runtime performance than Full."
-# "thin-dist: Similar to thin, but uses a distributed model rather than in-process: https://discourse.llvm.org/t/rfc-distributed-thinlto-build-for-kernel/85934"
-# "none: disable LTO
-: "${_use_llvm_lto:=none}"
+# Compiler and LTO selection - options are "none", "clang", "thin", "thin-dist" or "full".
+# ATTENTION - one of the predefined values should be selected!
+# "none": use GCC with LTO disabled.
+# "clang": use Clang as compiler but with LTO disabled.
+# "thin": use Clang with ThinLTO - multiple threads, faster and uses less memory, may have a lower runtime performance than Full.
+# "thin-dist": use Clang with distributed ThinLTO - https://discourse.llvm.org/t/rfc-distributed-thinlto-build-for-kernel/85934
+# "full": use Clang with Full LTO - 1 thread for Linking, slow and uses more memory, theoretically with the highest performance gains.
+: "${_use_llvm:=none}"
 
 # Use suffix -lto only when requested by the user
 # Enabled by default.
@@ -131,7 +132,12 @@
 
 # ATTENTION: Do not modify after this line
 _is_lto_kernel() {
-    [[ "$_use_llvm_lto" = "thin" || "$_use_llvm_lto" = "full"  || "$_use_llvm_lto" = "thin-dist" ]]
+    [[ "$_use_llvm" = "thin" || "$_use_llvm" = "full"  || "$_use_llvm" = "thin-dist" ]]
+    return $?
+}
+
+_is_clang_build() {
+    _is_lto_kernel || [[ "$_use_llvm" = "clang" ]]
     return $?
 }
 
@@ -142,7 +148,7 @@ _is_ci_build() {
 
 if _is_lto_kernel && [ "$_use_lto_suffix" = "yes"  ]; then
     _pkgsuffix="cachyos-${_cpusched}-lto"
-elif ! _is_lto_kernel && [ "$_use_gcc_suffix" = "yes" ]; then
+elif ! _is_clang_build && [ "$_use_gcc_suffix" = "yes" ]; then
     _pkgsuffix="cachyos-${_cpusched}-gcc"
 else
     _pkgsuffix="cachyos-${_cpusched}"
@@ -200,7 +206,7 @@ validpgpkeys=(
 )
 
 # LLVM makedepends
-if _is_lto_kernel; then
+if _is_clang_build; then
     makedepends+=(clang llvm lld)
     source+=("${_patchsource}/misc/dkms-clang.patch")
     BUILD_FLAGS=(
@@ -314,18 +320,18 @@ prepare() {
     fi
 
     ### Select LLVM level
-    case "$_use_llvm_lto" in
+    case "$_use_llvm" in
         thin) scripts/config -e LTO_CLANG_THIN;;
         thin-dist) scripts/config -e LTO_CLANG_THIN_DIST;;
         full) scripts/config -e LTO_CLANG_FULL;;
-        none) scripts/config -e LTO_NONE;;
-        *) _die "The value '$_use_llvm_lto' is invalid. Choose the correct one again.";;
+        clang|none) scripts/config -e LTO_NONE;;
+        *) _die "The value '$_use_llvm' is invalid. Choose the correct one again.";;
     esac
 
-    echo "Selecting '$_use_llvm_lto' LLVM level..."
+    echo "Selecting '$_use_llvm' LLVM level..."
 
     if ! _is_lto_kernel; then
-        echo "Enabling QR Code Panic for GCC Kernels"
+        echo "Enabling QR Code Panic for non-LTO Kernels"
         scripts/config --set-str DRM_PANIC_SCREEN qr_code -e DRM_PANIC_SCREEN_QR_CODE \
             --set-str DRM_PANIC_SCREEN_QR_CODE_URL https://panic.archlinux.org/panic_report# \
             --set-val CONFIG_DRM_PANIC_SCREEN_QR_VERSION 40
@@ -475,7 +481,7 @@ _sign_modules() {
     local sign_cert="${srcdir}/${_srcname}/certs/signing_key.x509"
     local hash_algo="$(grep -Po 'CONFIG_MODULE_SIG_HASH="\K[^"]*' "${srcdir}/${_srcname}/.config")"
 
-    if [ "$_use_llvm_lto" != "none" ]; then
+    if [ "$_use_llvm" != "none" ]; then
         local strip_bin="llvm-strip"
     else
         local strip_bin="strip"
@@ -508,7 +514,7 @@ build() {
         cd ${srcdir}/"zfs"
 
         local CONFIGURE_FLAGS=()
-        [ "$_use_llvm_lto" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        [ "$_use_llvm" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
 
         ./autogen.sh
         sed -i "s|\$(uname -r)|${_kernuname}|g" configure
@@ -569,6 +575,10 @@ _package-headers() {
      "${pkgbase}")
     provides=(LINUX-HEADERS)
 
+    if _is_clang_build; then
+        depends+=(clang llvm lld)
+    fi
+
     cd "${_srcname}"
     local builddir="$pkgdir/usr/lib/modules/$(<version)/build"
 
diff --git a/linux-cachyos-rc/PKGBUILD b/linux-cachyos-rc/PKGBUILD
index 911800188..261d800a2 100644
--- a/linux-cachyos-rc/PKGBUILD
+++ b/linux-cachyos-rc/PKGBUILD
@@ -86,13 +86,14 @@
 # - "generic" (kernel's default - to share the package between machines with different CPU µarch as long as they are x86-64)
 : "${_processor_opt:=}"
 
-# Clang LTO mode, only available with the "llvm" compiler - options are "none", "full" or "thin".
-# ATTENTION - one of three predefined values should be selected!
-# "full: uses 1 thread for Linking, slow and uses more memory, theoretically with the highest performance gains."
-# "thin: uses multiple threads, faster and uses less memory, may have a lower runtime performance than Full."
-# "thin-dist: Similar to thin, but uses a distributed model rather than in-process: https://discourse.llvm.org/t/rfc-distributed-thinlto-build-for-kernel/85934"
-# "none: disable LTO
-: "${_use_llvm_lto:=thin}"
+# Compiler and LTO selection - options are "none", "clang", "thin", "thin-dist" or "full".
+# ATTENTION - one of the predefined values should be selected!
+# "none": use GCC with LTO disabled.
+# "clang": use Clang as compiler but with LTO disabled.
+# "thin": use Clang with ThinLTO - multiple threads, faster and uses less memory, may have a lower runtime performance than Full.
+# "thin-dist": use Clang with distributed ThinLTO - https://discourse.llvm.org/t/rfc-distributed-thinlto-build-for-kernel/85934
+# "full": use Clang with Full LTO - 1 thread for Linking, slow and uses more memory, theoretically with the highest performance gains.
+: "${_use_llvm:=thin}"
 
 # Use suffix -lto only when requested by the user
 # yes - enable -lto suffix
@@ -156,7 +157,12 @@
 
 # ATTENTION: Do not modify after this line
 _is_lto_kernel() {
-    [[ "$_use_llvm_lto" = "thin" || "$_use_llvm_lto" = "full"  || "$_use_llvm_lto" = "thin-dist" ]]
+    [[ "$_use_llvm" = "thin" || "$_use_llvm" = "full"  || "$_use_llvm" = "thin-dist" ]]
+    return $?
+}
+
+_is_clang_build() {
+    _is_lto_kernel || [[ "$_use_llvm" = "clang" ]]
     return $?
 }
 
@@ -167,7 +173,7 @@ _is_ci_build() {
 
 if _is_lto_kernel && [ "$_use_lto_suffix" = "yes"  ]; then
     _pkgsuffix="cachyos-rc-lto"
-elif ! _is_lto_kernel && [ "$_use_gcc_suffix" = "yes" ]; then
+elif ! _is_clang_build && [ "$_use_gcc_suffix" = "yes" ]; then
     _pkgsuffix="cachyos-rc-gcc"
 else
     _pkgsuffix="cachyos-rc"
@@ -229,7 +235,7 @@ validpgpkeys=(
 )
 
 # LLVM makedepends
-if _is_lto_kernel; then
+if _is_clang_build; then
     makedepends+=(clang llvm lld)
     source+=("${_patchsource}/misc/dkms-clang.patch")
     BUILD_FLAGS=(
@@ -358,18 +364,18 @@ prepare() {
     fi
 
     ### Select LLVM level
-    case "$_use_llvm_lto" in
+    case "$_use_llvm" in
         thin) scripts/config -e LTO_CLANG_THIN;;
         thin-dist) scripts/config -e LTO_CLANG_THIN_DIST;;
         full) scripts/config -e LTO_CLANG_FULL;;
-        none) scripts/config -e LTO_NONE;;
-        *) _die "The value '$_use_llvm_lto' is invalid. Choose the correct one again.";;
+        clang|none) scripts/config -e LTO_NONE;;
+        *) _die "The value '$_use_llvm' is invalid. Choose the correct one again.";;
     esac
 
-    echo "Selecting '$_use_llvm_lto' LLVM level..."
+    echo "Selecting '$_use_llvm' LLVM level..."
 
     if ! _is_lto_kernel; then
-        echo "Enabling QR Code Panic for GCC Kernels"
+        echo "Enabling QR Code Panic for non-LTO Kernels"
         scripts/config --set-str DRM_PANIC_SCREEN qr_code -e DRM_PANIC_SCREEN_QR_CODE \
             --set-str DRM_PANIC_SCREEN_QR_CODE_URL https://panic.archlinux.org/panic_report# \
             --set-val CONFIG_DRM_PANIC_SCREEN_QR_VERSION 40
@@ -537,7 +543,7 @@ _sign_modules() {
     local sign_cert="${srcdir}/${_srcname}/certs/signing_key.x509"
     local hash_algo="$(grep -Po 'CONFIG_MODULE_SIG_HASH="\K[^"]*' "${srcdir}/${_srcname}/.config")"
 
-    if [ "$_use_llvm_lto" != "none" ]; then
+    if [ "$_use_llvm" != "none" ]; then
         local strip_bin="llvm-strip"
     else
         local strip_bin="strip"
@@ -573,7 +579,7 @@ build() {
         cd ${srcdir}/"zfs"
 
         local CONFIGURE_FLAGS=()
-        [ "$_use_llvm_lto" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        [ "$_use_llvm" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
 
         ./autogen.sh
         sed -i "s|\$(uname -r)|${_kernuname}|g" configure
@@ -634,7 +640,7 @@ _package-headers() {
      "${pkgbase}")
     provides=(LINUX-HEADERS)
 
-    if _is_lto_kernel; then
+    if _is_clang_build; then
         depends+=(clang llvm lld)
     fi
 
diff --git a/linux-cachyos-rt-bore/PKGBUILD b/linux-cachyos-rt-bore/PKGBUILD
index 3350dc93d..eb83cfe46 100644
--- a/linux-cachyos-rt-bore/PKGBUILD
+++ b/linux-cachyos-rt-bore/PKGBUILD
@@ -86,13 +86,14 @@
 # - "generic" (kernel's default - to share the package between machines with different CPU µarch as long as they are x86-64)
 : "${_processor_opt:=}"
 
-# Clang LTO mode, only available with the "llvm" compiler - options are "none", "full" or "thin".
-# ATTENTION - one of three predefined values should be selected!
-# "full: uses 1 thread for Linking, slow and uses more memory, theoretically with the highest performance gains."
-# "thin: uses multiple threads, faster and uses less memory, may have a lower runtime performance than Full."
-# "thin-dist: Similar to thin, but uses a distributed model rather than in-process: https://discourse.llvm.org/t/rfc-distributed-thinlto-build-for-kernel/85934"
-# "none: disable LTO
-: "${_use_llvm_lto:=none}"
+# Compiler and LTO selection - options are "none", "clang", "thin", "thin-dist" or "full".
+# ATTENTION - one of the predefined values should be selected!
+# "none": use GCC with LTO disabled.
+# "clang": use Clang as compiler but with LTO disabled.
+# "thin": use Clang with ThinLTO - multiple threads, faster and uses less memory, may have a lower runtime performance than Full.
+# "thin-dist": use Clang with distributed ThinLTO - https://discourse.llvm.org/t/rfc-distributed-thinlto-build-for-kernel/85934
+# "full": use Clang with Full LTO - 1 thread for Linking, slow and uses more memory, theoretically with the highest performance gains.
+: "${_use_llvm:=none}"
 
 # Use suffix -lto only when requested by the user
 # Enabled by default.
@@ -131,7 +132,12 @@
 
 # ATTENTION: Do not modify after this line
 _is_lto_kernel() {
-    [[ "$_use_llvm_lto" = "thin" || "$_use_llvm_lto" = "full"  || "$_use_llvm_lto" = "thin-dist" ]]
+    [[ "$_use_llvm" = "thin" || "$_use_llvm" = "full"  || "$_use_llvm" = "thin-dist" ]]
+    return $?
+}
+
+_is_clang_build() {
+    _is_lto_kernel || [[ "$_use_llvm" = "clang" ]]
     return $?
 }
 
@@ -142,7 +148,7 @@ _is_ci_build() {
 
 if _is_lto_kernel && [ "$_use_lto_suffix" = "yes"  ]; then
     _pkgsuffix="cachyos-${_cpusched}-lto"
-elif ! _is_lto_kernel && [ "$_use_gcc_suffix" = "yes" ]; then
+elif ! _is_clang_build && [ "$_use_gcc_suffix" = "yes" ]; then
     _pkgsuffix="cachyos-${_cpusched}-gcc"
 else
     _pkgsuffix="cachyos-${_cpusched}"
@@ -203,7 +209,7 @@ validpgpkeys=(
 )
 
 # LLVM makedepends
-if _is_lto_kernel; then
+if _is_clang_build; then
     makedepends+=(clang llvm lld)
     source+=("${_patchsource}/misc/dkms-clang.patch")
     BUILD_FLAGS=(
@@ -317,18 +323,18 @@ prepare() {
     fi
 
     ### Select LLVM level
-    case "$_use_llvm_lto" in
+    case "$_use_llvm" in
         thin) scripts/config -e LTO_CLANG_THIN;;
         thin-dist) scripts/config -e LTO_CLANG_THIN_DIST;;
         full) scripts/config -e LTO_CLANG_FULL;;
-        none) scripts/config -e LTO_NONE;;
-        *) _die "The value '$_use_llvm_lto' is invalid. Choose the correct one again.";;
+        clang|none) scripts/config -e LTO_NONE;;
+        *) _die "The value '$_use_llvm' is invalid. Choose the correct one again.";;
     esac
 
-    echo "Selecting '$_use_llvm_lto' LLVM level..."
+    echo "Selecting '$_use_llvm' LLVM level..."
 
     if ! _is_lto_kernel; then
-        echo "Enabling QR Code Panic for GCC Kernels"
+        echo "Enabling QR Code Panic for non-LTO Kernels"
         scripts/config --set-str DRM_PANIC_SCREEN qr_code -e DRM_PANIC_SCREEN_QR_CODE \
             --set-str DRM_PANIC_SCREEN_QR_CODE_URL https://panic.archlinux.org/panic_report# \
             --set-val CONFIG_DRM_PANIC_SCREEN_QR_VERSION 40
@@ -475,7 +481,7 @@ _sign_modules() {
     local sign_cert="${srcdir}/${_srcname}/certs/signing_key.x509"
     local hash_algo="$(grep -Po 'CONFIG_MODULE_SIG_HASH="\K[^"]*' "${srcdir}/${_srcname}/.config")"
 
-    if [ "$_use_llvm_lto" != "none" ]; then
+    if [ "$_use_llvm" != "none" ]; then
         local strip_bin="llvm-strip"
     else
         local strip_bin="strip"
@@ -511,7 +517,7 @@ build() {
         cd ${srcdir}/"zfs"
 
         local CONFIGURE_FLAGS=()
-        [ "$_use_llvm_lto" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        [ "$_use_llvm" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
 
         ./autogen.sh
         sed -i "s|\$(uname -r)|${_kernuname}|g" configure
@@ -572,6 +578,10 @@ _package-headers() {
      "${pkgbase}")
     provides=(LINUX-HEADERS)
 
+    if _is_clang_build; then
+        depends+=(clang llvm lld)
+    fi
+
     cd "${_srcname}"
     local builddir="$pkgdir/usr/lib/modules/$(<version)/build"
 
diff --git a/linux-cachyos-server/PKGBUILD b/linux-cachyos-server/PKGBUILD
index 33d4d7a84..c735bf04a 100644
--- a/linux-cachyos-server/PKGBUILD
+++ b/linux-cachyos-server/PKGBUILD
@@ -86,13 +86,14 @@
 # - "generic" (kernel's default - to share the package between machines with different CPU µarch as long as they are x86-64)
 : "${_processor_opt:=}"
 
-# Clang LTO mode, only available with the "llvm" compiler - options are "none", "full" or "thin".
-# ATTENTION - one of three predefined values should be selected!
-# "full: uses 1 thread for Linking, slow and uses more memory, theoretically with the highest performance gains."
-# "thin: uses multiple threads, faster and uses less memory, may have a lower runtime performance than Full."
-# "thin-dist: Similar to thin, but uses a distributed model rather than in-process: https://discourse.llvm.org/t/rfc-distributed-thinlto-build-for-kernel/85934"
-# "none: disable LTO
-: "${_use_llvm_lto:=none}"
+# Compiler and LTO selection - options are "none", "clang", "thin", "thin-dist" or "full".
+# ATTENTION - one of the predefined values should be selected!
+# "none": use GCC with LTO disabled.
+# "clang": use Clang as compiler but with LTO disabled.
+# "thin": use Clang with ThinLTO - multiple threads, faster and uses less memory, may have a lower runtime performance than Full.
+# "thin-dist": use Clang with distributed ThinLTO - https://discourse.llvm.org/t/rfc-distributed-thinlto-build-for-kernel/85934
+# "full": use Clang with Full LTO - 1 thread for Linking, slow and uses more memory, theoretically with the highest performance gains.
+: "${_use_llvm:=none}"
 
 # Use suffix -lto only when requested by the user
 # Enabled by default.
@@ -131,7 +132,12 @@
 
 # ATTENTION: Do not modify after this line
 _is_lto_kernel() {
-    [[ "$_use_llvm_lto" = "thin" || "$_use_llvm_lto" = "full"  || "$_use_llvm_lto" = "thin-dist" ]]
+    [[ "$_use_llvm" = "thin" || "$_use_llvm" = "full"  || "$_use_llvm" = "thin-dist" ]]
+    return $?
+}
+
+_is_clang_build() {
+    _is_lto_kernel || [[ "$_use_llvm" = "clang" ]]
     return $?
 }
 
@@ -142,7 +148,7 @@ _is_ci_build() {
 
 if _is_lto_kernel && [ "$_use_lto_suffix" = "yes"  ]; then
     _pkgsuffix="cachyos-server-lto"
-elif ! _is_lto_kernel && [ "$_use_gcc_suffix" = "yes" ]; then
+elif ! _is_clang_build && [ "$_use_gcc_suffix" = "yes" ]; then
     _pkgsuffix="cachyos-server-gcc"
 else
     _pkgsuffix="cachyos-server"
@@ -200,7 +206,7 @@ validpgpkeys=(
 )
 
 # LLVM makedepends
-if _is_lto_kernel; then
+if _is_clang_build; then
     makedepends+=(clang llvm lld)
     source+=("${_patchsource}/misc/dkms-clang.patch")
     BUILD_FLAGS=(
@@ -314,18 +320,18 @@ prepare() {
     fi
 
     ### Select LLVM level
-    case "$_use_llvm_lto" in
+    case "$_use_llvm" in
         thin) scripts/config -e LTO_CLANG_THIN;;
         thin-dist) scripts/config -e LTO_CLANG_THIN_DIST;;
         full) scripts/config -e LTO_CLANG_FULL;;
-        none) scripts/config -e LTO_NONE;;
-        *) _die "The value '$_use_llvm_lto' is invalid. Choose the correct one again.";;
+        clang|none) scripts/config -e LTO_NONE;;
+        *) _die "The value '$_use_llvm' is invalid. Choose the correct one again.";;
     esac
 
-    echo "Selecting '$_use_llvm_lto' LLVM level..."
+    echo "Selecting '$_use_llvm' LLVM level..."
 
     if ! _is_lto_kernel; then
-        echo "Enabling QR Code Panic for GCC Kernels"
+        echo "Enabling QR Code Panic for non-LTO Kernels"
         scripts/config --set-str DRM_PANIC_SCREEN qr_code -e DRM_PANIC_SCREEN_QR_CODE \
             --set-str DRM_PANIC_SCREEN_QR_CODE_URL https://panic.archlinux.org/panic_report# \
             --set-val CONFIG_DRM_PANIC_SCREEN_QR_VERSION 40
@@ -472,7 +478,7 @@ _sign_modules() {
     local sign_cert="${srcdir}/${_srcname}/certs/signing_key.x509"
     local hash_algo="$(grep -Po 'CONFIG_MODULE_SIG_HASH="\K[^"]*' "${srcdir}/${_srcname}/.config")"
 
-    if [ "$_use_llvm_lto" != "none" ]; then
+    if [ "$_use_llvm" != "none" ]; then
         local strip_bin="llvm-strip"
     else
         local strip_bin="strip"
@@ -508,7 +514,7 @@ build() {
         cd ${srcdir}/"zfs"
 
         local CONFIGURE_FLAGS=()
-        [ "$_use_llvm_lto" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        [ "$_use_llvm" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
 
         ./autogen.sh
         sed -i "s|\$(uname -r)|${_kernuname}|g" configure
@@ -569,6 +575,10 @@ _package-headers() {
      "${pkgbase}")
     provides=(LINUX-HEADERS)
 
+    if _is_clang_build; then
+        depends+=(clang llvm lld)
+    fi
+
     cd "${_srcname}"
     local builddir="$pkgdir/usr/lib/modules/$(<version)/build"
 

From 5b61c40d3b45abd7eede295060a2b9030a88ad07 Mon Sep 17 00:00:00 2001
From: Peter Jung <admin@ptr1337.dev>
Date: Sun, 16 Aug 2026 17:09:18 +0200
Subject: [PATCH 3/7] script: Update for new LLVM setting

Signed-off-by: Peter Jung <admin@ptr1337.dev>
---
 script-v3-v4.sh | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/script-v3-v4.sh b/script-v3-v4.sh
index 59f14d0cc..f91981b5d 100755
--- a/script-v3-v4.sh
+++ b/script-v3-v4.sh
@@ -1,4 +1,14 @@
 #!/usr/bin/env bash
+
+set_llvm_level() {
+    local old_level=$1
+    local new_level=$2
+
+    find . -name "PKGBUILD" -exec sed -i \
+        -e "s/_use_llvm:=${old_level}/_use_llvm:=${new_level}/" \
+        -e "s/_use_llvm_lto:=${old_level}/_use_llvm_lto:=${new_level}/" {} +
+}
+
 ## Enable ZFS
 find . -name "PKGBUILD" | xargs -I {} sed -i "s/_build_zfs:=no/_build_zfs:=yes/" {}
 ## Enable Generic v3
@@ -9,7 +19,7 @@ find . -name "PKGBUILD" | xargs -I {} sed -i "s/_build_nvidia_open:=no/_build_nv
 ## Enable r8125 module
 find . -name "PKGBUILD" | xargs -I {} sed -i "s/_build_r8125:=no/_build_r8125:=yes/" {}
 ## Disable clang-LTO
-find . -name "PKGBUILD" | xargs -I {} sed -i "s/_use_llvm_lto:=thin/_use_llvm_lto:=none/" {}
+set_llvm_level thin none
 
 ## GCC v3 Kernel
 
@@ -25,7 +35,7 @@ do
 done
 
 ## LLVM ThinLTO v3 Kernel
-find . -name "PKGBUILD" | xargs -I {} sed -i "s/_use_llvm_lto:=none/_use_llvm_lto:=thin/" {}
+set_llvm_level none thin
 
 files=$(find . -name "PKGBUILD")
 
@@ -45,7 +55,7 @@ RUST_LOG=trace repo-manage-util -p cachyos-v3 update
 RUST_LOG=trace repo-manage-util -p cachyos-v3 update
 
 ## GCC v4 Kernel
-find . -name "PKGBUILD" | xargs -I {} sed -i "s/_use_llvm_lto:=thin/_use_llvm_lto:=none/" {}
+set_llvm_level thin none
 find . -name "PKGBUILD" | xargs -I {} sed -i "s/_processor_opt:=GENERIC_V3/_processor_opt:=GENERIC_V4/" {}
 
 files=$(find . -name "PKGBUILD")
@@ -60,7 +70,7 @@ do
 done
 
 ## LLVM ThinLTO v4 Kernel
-find . -name "PKGBUILD" | xargs -I {} sed -i "s/_use_llvm_lto:=none/_use_llvm_lto:=thin/" {}
+set_llvm_level none thin
 
 files=$(find . -name "PKGBUILD")
 

From 1979817e98fecaf65203fad6603baac8a6d39b5a Mon Sep 17 00:00:00 2001
From: Peter Jung <admin@ptr1337.dev>
Date: Sun, 16 Aug 2026 17:12:18 +0200
Subject: [PATCH 4/7] script: remove deprecated option

Signed-off-by: Peter Jung <admin@ptr1337.dev>
---
 script-v3-v4.sh | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/script-v3-v4.sh b/script-v3-v4.sh
index f91981b5d..cf5067471 100755
--- a/script-v3-v4.sh
+++ b/script-v3-v4.sh
@@ -5,8 +5,7 @@ set_llvm_level() {
     local new_level=$2
 
     find . -name "PKGBUILD" -exec sed -i \
-        -e "s/_use_llvm:=${old_level}/_use_llvm:=${new_level}/" \
-        -e "s/_use_llvm_lto:=${old_level}/_use_llvm_lto:=${new_level}/" {} +
+        -e "s/_use_llvm:=${old_level}/_use_llvm:=${new_level}/" {} +
 }
 
 ## Enable ZFS

From 4418f3bafe6e8791cac54280607a132020880f33 Mon Sep 17 00:00:00 2001
From: Peter Jung <admin@ptr1337.dev>
Date: Sun, 16 Aug 2026 17:12:45 +0200
Subject: [PATCH 5/7] PKGBUILD: Adjust KERNEL_LLVM detection

Signed-off-by: Peter Jung <admin@ptr1337.dev>
---
 linux-cachyos-bmq/PKGBUILD      |  6 +++--
 linux-cachyos-bore/PKGBUILD     |  6 +++--
 linux-cachyos-deckify/PKGBUILD  |  6 +++--
 linux-cachyos-eevdf/PKGBUILD    |  6 +++--
 linux-cachyos-hardened/PKGBUILD |  6 +++--
 linux-cachyos-lts/PKGBUILD      | 46 +++++++++++++++++++++------------
 linux-cachyos-rc/PKGBUILD       |  6 +++--
 linux-cachyos-rt-bore/PKGBUILD  |  6 +++--
 linux-cachyos-server/PKGBUILD   |  6 +++--
 linux-cachyos/PKGBUILD          |  6 +++--
 10 files changed, 65 insertions(+), 35 deletions(-)

diff --git a/linux-cachyos-bmq/PKGBUILD b/linux-cachyos-bmq/PKGBUILD
index 60ee1f7c2..1e4611391 100644
--- a/linux-cachyos-bmq/PKGBUILD
+++ b/linux-cachyos-bmq/PKGBUILD
@@ -478,7 +478,7 @@ _sign_modules() {
     local sign_cert="${srcdir}/${_srcname}/certs/signing_key.x509"
     local hash_algo="$(grep -Po 'CONFIG_MODULE_SIG_HASH="\K[^"]*' "${srcdir}/${_srcname}/.config")"
 
-    if [ "$_use_llvm" != "none" ]; then
+    if _is_clang_build; then
         local strip_bin="llvm-strip"
     else
         local strip_bin="strip"
@@ -514,7 +514,9 @@ build() {
         cd ${srcdir}/"zfs"
 
         local CONFIGURE_FLAGS=()
-        [ "$_use_llvm" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        if _is_clang_build; then
+            CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        fi
 
         ./autogen.sh
         sed -i "s|\$(uname -r)|${_kernuname}|g" configure
diff --git a/linux-cachyos-bore/PKGBUILD b/linux-cachyos-bore/PKGBUILD
index e0346daaf..3aab2843c 100644
--- a/linux-cachyos-bore/PKGBUILD
+++ b/linux-cachyos-bore/PKGBUILD
@@ -478,7 +478,7 @@ _sign_modules() {
     local sign_cert="${srcdir}/${_srcname}/certs/signing_key.x509"
     local hash_algo="$(grep -Po 'CONFIG_MODULE_SIG_HASH="\K[^"]*' "${srcdir}/${_srcname}/.config")"
 
-    if [ "$_use_llvm" != "none" ]; then
+    if _is_clang_build; then
         local strip_bin="llvm-strip"
     else
         local strip_bin="strip"
@@ -514,7 +514,9 @@ build() {
         cd ${srcdir}/"zfs"
 
         local CONFIGURE_FLAGS=()
-        [ "$_use_llvm" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        if _is_clang_build; then
+            CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        fi
 
         ./autogen.sh
         sed -i "s|\$(uname -r)|${_kernuname}|g" configure
diff --git a/linux-cachyos-deckify/PKGBUILD b/linux-cachyos-deckify/PKGBUILD
index bf0d48aba..acf20da9f 100644
--- a/linux-cachyos-deckify/PKGBUILD
+++ b/linux-cachyos-deckify/PKGBUILD
@@ -497,7 +497,7 @@ _sign_modules() {
     local sign_cert="${srcdir}/${_srcname}/certs/signing_key.x509"
     local hash_algo="$(grep -Po 'CONFIG_MODULE_SIG_HASH="\K[^"]*' "${srcdir}/${_srcname}/.config")"
 
-    if [ "$_use_llvm" != "none" ]; then
+    if _is_clang_build; then
         local strip_bin="llvm-strip"
     else
         local strip_bin="strip"
@@ -533,7 +533,9 @@ build() {
         cd ${srcdir}/"zfs"
 
         local CONFIGURE_FLAGS=()
-        [ "$_use_llvm" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        if _is_clang_build; then
+            CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        fi
 
         ./autogen.sh
         sed -i "s|\$(uname -r)|${_kernuname}|g" configure
diff --git a/linux-cachyos-eevdf/PKGBUILD b/linux-cachyos-eevdf/PKGBUILD
index bd2be4ec4..7ab7689e8 100644
--- a/linux-cachyos-eevdf/PKGBUILD
+++ b/linux-cachyos-eevdf/PKGBUILD
@@ -481,7 +481,7 @@ _sign_modules() {
     local sign_cert="${srcdir}/${_srcname}/certs/signing_key.x509"
     local hash_algo="$(grep -Po 'CONFIG_MODULE_SIG_HASH="\K[^"]*' "${srcdir}/${_srcname}/.config")"
 
-    if [ "$_use_llvm" != "none" ]; then
+    if _is_clang_build; then
         local strip_bin="llvm-strip"
     else
         local strip_bin="strip"
@@ -517,7 +517,9 @@ build() {
         cd ${srcdir}/"zfs"
 
         local CONFIGURE_FLAGS=()
-        [ "$_use_llvm" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        if _is_clang_build; then
+            CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        fi
 
         ./autogen.sh
         sed -i "s|\$(uname -r)|${_kernuname}|g" configure
diff --git a/linux-cachyos-hardened/PKGBUILD b/linux-cachyos-hardened/PKGBUILD
index fe78c47bc..f27115bd0 100644
--- a/linux-cachyos-hardened/PKGBUILD
+++ b/linux-cachyos-hardened/PKGBUILD
@@ -481,7 +481,7 @@ _sign_modules() {
     local sign_cert="${srcdir}/${_srcname}/certs/signing_key.x509"
     local hash_algo="$(grep -Po 'CONFIG_MODULE_SIG_HASH="\K[^"]*' "${srcdir}/${_srcname}/.config")"
 
-    if [ "$_use_llvm" != "none" ]; then
+    if _is_clang_build; then
         local strip_bin="llvm-strip"
     else
         local strip_bin="strip"
@@ -514,7 +514,9 @@ build() {
         cd ${srcdir}/"zfs"
 
         local CONFIGURE_FLAGS=()
-        [ "$_use_llvm" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        if _is_clang_build; then
+            CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        fi
 
         ./autogen.sh
         sed -i "s|\$(uname -r)|${_kernuname}|g" configure
diff --git a/linux-cachyos-lts/PKGBUILD b/linux-cachyos-lts/PKGBUILD
index 1a56479b6..74afd634d 100644
--- a/linux-cachyos-lts/PKGBUILD
+++ b/linux-cachyos-lts/PKGBUILD
@@ -81,13 +81,14 @@
 # - "generic" (kernel's default - to share the package between machines with different CPU µarch as long as they are x86-64)
 : "${_processor_opt:=}"
 
-# Clang LTO mode, only available with the "llvm" compiler - options are "none", "full" or "thin".
-# ATTENTION - one of three predefined values should be selected!
-# "full: uses 1 thread for Linking, slow and uses more memory, theoretically with the highest performance gains."
-# "thin: uses multiple threads, faster and uses less memory, may have a lower runtime performance than Full."
-# "thin-dist: Similar to thin, but uses a distributed model rather than in-process: https://discourse.llvm.org/t/rfc-distributed-thinlto-build-for-kernel/85934"
-# "none: disable LTO
-: "${_use_llvm_lto:=none}"
+# Compiler and LTO selection - options are "none", "clang", "thin", "thin-dist" or "full".
+# ATTENTION - one of the predefined values should be selected!
+# "none": use GCC with LTO disabled.
+# "clang": use Clang as compiler but with LTO disabled.
+# "thin": use Clang with ThinLTO - multiple threads, faster and uses less memory, may have a lower runtime performance than Full.
+# "thin-dist": use Clang with distributed ThinLTO - https://discourse.llvm.org/t/rfc-distributed-thinlto-build-for-kernel/85934
+# "full": use Clang with Full LTO - 1 thread for Linking, slow and uses more memory, theoretically with the highest performance gains.
+: "${_use_llvm:=none}"
 
 # Use suffix -lto only when requested by the user
 # Enabled by default.
@@ -126,7 +127,12 @@
 
 # ATTENTION: Do not modify after this line
 _is_lto_kernel() {
-    [[ "$_use_llvm_lto" = "thin" || "$_use_llvm_lto" = "full"  || "$_use_llvm_lto" = "thin-dist" ]]
+    [[ "$_use_llvm" = "thin" || "$_use_llvm" = "full"  || "$_use_llvm" = "thin-dist" ]]
+    return $?
+}
+
+_is_clang_build() {
+    _is_lto_kernel || [[ "$_use_llvm" = "clang" ]]
     return $?
 }
 
@@ -137,7 +143,7 @@ _is_ci_build() {
 
 if _is_lto_kernel && [ "$_use_lto_suffix" = "yes"  ]; then
     _pkgsuffix="cachyos-lts-lto"
-elif ! _is_lto_kernel && [ "$_use_gcc_suffix" = "yes" ]; then
+elif ! _is_clang_build && [ "$_use_gcc_suffix" = "yes" ]; then
     _pkgsuffix="cachyos-lts-gcc"
 else
     _pkgsuffix="cachyos-lts"
@@ -199,7 +205,7 @@ validpgpkeys=(
 )
 
 # LLVM makedepends
-if _is_lto_kernel; then
+if _is_clang_build; then
     makedepends+=(clang llvm lld)
     source+=("${_patchsource}/misc/dkms-clang.patch")
     BUILD_FLAGS=(
@@ -311,18 +317,18 @@ prepare() {
     fi
 
     ### Select LLVM level
-    case "$_use_llvm_lto" in
+    case "$_use_llvm" in
         thin) scripts/config -e LTO_CLANG_THIN;;
         thin-dist) scripts/config -e LTO_CLANG_THIN_DIST;;
         full) scripts/config -e LTO_CLANG_FULL;;
-        none) scripts/config -e LTO_NONE;;
-        *) _die "The value '$_use_llvm_lto' is invalid. Choose the correct one again.";;
+        clang|none) scripts/config -e LTO_NONE;;
+        *) _die "The value '$_use_llvm' is invalid. Choose the correct one again.";;
     esac
 
-    echo "Selecting '$_use_llvm_lto' LLVM level..."
+    echo "Selecting '$_use_llvm' LLVM level..."
 
     if ! _is_lto_kernel; then
-        echo "Enabling QR Code Panic for GCC Kernels"
+        echo "Enabling QR Code Panic for non-LTO Kernels"
         scripts/config --set-str DRM_PANIC_SCREEN qr_code -e DRM_PANIC_SCREEN_QR_CODE \
             --set-str DRM_PANIC_SCREEN_QR_CODE_URL https://panic.archlinux.org/panic_report# \
             --set-val CONFIG_DRM_PANIC_SCREEN_QR_VERSION 40
@@ -474,7 +480,7 @@ _sign_modules() {
     local sign_cert="${srcdir}/${_srcname}/certs/signing_key.x509"
     local hash_algo="$(grep -Po 'CONFIG_MODULE_SIG_HASH="\K[^"]*' "${srcdir}/${_srcname}/.config")"
 
-    if [ "$_use_llvm_lto" != "none" ]; then
+    if _is_clang_build; then
         local strip_bin="llvm-strip"
     else
         local strip_bin="strip"
@@ -510,7 +516,9 @@ build() {
         cd ${srcdir}/"zfs"
 
         local CONFIGURE_FLAGS=()
-        [ "$_use_llvm_lto" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        if _is_clang_build; then
+            CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        fi
 
         ./autogen.sh
         sed -i "s|\$(uname -r)|${_kernuname}|g" configure
@@ -571,6 +579,10 @@ _package-headers() {
      "${pkgbase}")
     provides=(LINUX-HEADERS)
 
+    if _is_clang_build; then
+        depends+=(clang llvm lld)
+    fi
+
     cd "${_srcname}"
     local builddir="$pkgdir/usr/lib/modules/$(<version)/build"
 
diff --git a/linux-cachyos-rc/PKGBUILD b/linux-cachyos-rc/PKGBUILD
index 261d800a2..93e94416d 100644
--- a/linux-cachyos-rc/PKGBUILD
+++ b/linux-cachyos-rc/PKGBUILD
@@ -543,7 +543,7 @@ _sign_modules() {
     local sign_cert="${srcdir}/${_srcname}/certs/signing_key.x509"
     local hash_algo="$(grep -Po 'CONFIG_MODULE_SIG_HASH="\K[^"]*' "${srcdir}/${_srcname}/.config")"
 
-    if [ "$_use_llvm" != "none" ]; then
+    if _is_clang_build; then
         local strip_bin="llvm-strip"
     else
         local strip_bin="strip"
@@ -579,7 +579,9 @@ build() {
         cd ${srcdir}/"zfs"
 
         local CONFIGURE_FLAGS=()
-        [ "$_use_llvm" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        if _is_clang_build; then
+            CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        fi
 
         ./autogen.sh
         sed -i "s|\$(uname -r)|${_kernuname}|g" configure
diff --git a/linux-cachyos-rt-bore/PKGBUILD b/linux-cachyos-rt-bore/PKGBUILD
index eb83cfe46..92fa42a4c 100644
--- a/linux-cachyos-rt-bore/PKGBUILD
+++ b/linux-cachyos-rt-bore/PKGBUILD
@@ -481,7 +481,7 @@ _sign_modules() {
     local sign_cert="${srcdir}/${_srcname}/certs/signing_key.x509"
     local hash_algo="$(grep -Po 'CONFIG_MODULE_SIG_HASH="\K[^"]*' "${srcdir}/${_srcname}/.config")"
 
-    if [ "$_use_llvm" != "none" ]; then
+    if _is_clang_build; then
         local strip_bin="llvm-strip"
     else
         local strip_bin="strip"
@@ -517,7 +517,9 @@ build() {
         cd ${srcdir}/"zfs"
 
         local CONFIGURE_FLAGS=()
-        [ "$_use_llvm" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        if _is_clang_build; then
+            CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        fi
 
         ./autogen.sh
         sed -i "s|\$(uname -r)|${_kernuname}|g" configure
diff --git a/linux-cachyos-server/PKGBUILD b/linux-cachyos-server/PKGBUILD
index c735bf04a..5e24ff4ee 100644
--- a/linux-cachyos-server/PKGBUILD
+++ b/linux-cachyos-server/PKGBUILD
@@ -478,7 +478,7 @@ _sign_modules() {
     local sign_cert="${srcdir}/${_srcname}/certs/signing_key.x509"
     local hash_algo="$(grep -Po 'CONFIG_MODULE_SIG_HASH="\K[^"]*' "${srcdir}/${_srcname}/.config")"
 
-    if [ "$_use_llvm" != "none" ]; then
+    if _is_clang_build; then
         local strip_bin="llvm-strip"
     else
         local strip_bin="strip"
@@ -514,7 +514,9 @@ build() {
         cd ${srcdir}/"zfs"
 
         local CONFIGURE_FLAGS=()
-        [ "$_use_llvm" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        if _is_clang_build; then
+            CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        fi
 
         ./autogen.sh
         sed -i "s|\$(uname -r)|${_kernuname}|g" configure
diff --git a/linux-cachyos/PKGBUILD b/linux-cachyos/PKGBUILD
index bf4663744..2b2c57e18 100644
--- a/linux-cachyos/PKGBUILD
+++ b/linux-cachyos/PKGBUILD
@@ -539,7 +539,7 @@ _sign_modules() {
     local sign_cert="${srcdir}/${_srcname}/certs/signing_key.x509"
     local hash_algo="$(grep -Po 'CONFIG_MODULE_SIG_HASH="\K[^"]*' "${srcdir}/${_srcname}/.config")"
 
-    if [ "$_use_llvm" != "none" ]; then
+    if _is_clang_build; then
         local strip_bin="llvm-strip"
     else
         local strip_bin="strip"
@@ -575,7 +575,9 @@ build() {
         cd ${srcdir}/"zfs"
 
         local CONFIGURE_FLAGS=()
-        [ "$_use_llvm" != "none" ] && CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        if _is_clang_build; then
+            CONFIGURE_FLAGS+=("KERNEL_LLVM=1")
+        fi
 
         ./autogen.sh
         sed -i "s|\$(uname -r)|${_kernuname}|g" configure

From 4d682ec5c484b1b5008d1cf122bcde4d9c58e8ae Mon Sep 17 00:00:00 2001
From: Peter Jung <admin@ptr1337.dev>
Date: Sun, 16 Aug 2026 17:15:12 +0200
Subject: [PATCH 6/7] PKGBUILD: Allow QR Code for Clang only option

Signed-off-by: Peter Jung <admin@ptr1337.dev>
---
 linux-cachyos-bmq/PKGBUILD      | 2 +-
 linux-cachyos-bore/PKGBUILD     | 2 +-
 linux-cachyos-deckify/PKGBUILD  | 2 +-
 linux-cachyos-eevdf/PKGBUILD    | 2 +-
 linux-cachyos-hardened/PKGBUILD | 2 +-
 linux-cachyos-lts/PKGBUILD      | 2 +-
 linux-cachyos-rc/PKGBUILD       | 2 +-
 linux-cachyos-rt-bore/PKGBUILD  | 2 +-
 linux-cachyos-server/PKGBUILD   | 2 +-
 linux-cachyos/PKGBUILD          | 2 +-
 10 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/linux-cachyos-bmq/PKGBUILD b/linux-cachyos-bmq/PKGBUILD
index 1e4611391..1a4c975ca 100644
--- a/linux-cachyos-bmq/PKGBUILD
+++ b/linux-cachyos-bmq/PKGBUILD
@@ -330,7 +330,7 @@ prepare() {
 
     echo "Selecting '$_use_llvm' LLVM level..."
 
-    if ! _is_lto_kernel; then
+    if [[ "$_use_llvm" = "none" || "$_use_llvm" = "clang" ]]; then
         echo "Enabling QR Code Panic for non-LTO Kernels"
         scripts/config --set-str DRM_PANIC_SCREEN qr_code -e DRM_PANIC_SCREEN_QR_CODE \
             --set-str DRM_PANIC_SCREEN_QR_CODE_URL https://panic.archlinux.org/panic_report# \
diff --git a/linux-cachyos-bore/PKGBUILD b/linux-cachyos-bore/PKGBUILD
index 3aab2843c..ed601b01b 100644
--- a/linux-cachyos-bore/PKGBUILD
+++ b/linux-cachyos-bore/PKGBUILD
@@ -330,7 +330,7 @@ prepare() {
 
     echo "Selecting '$_use_llvm' LLVM level..."
 
-    if ! _is_lto_kernel; then
+    if [[ "$_use_llvm" = "none" || "$_use_llvm" = "clang" ]]; then
         echo "Enabling QR Code Panic for non-LTO Kernels"
         scripts/config --set-str DRM_PANIC_SCREEN qr_code -e DRM_PANIC_SCREEN_QR_CODE \
             --set-str DRM_PANIC_SCREEN_QR_CODE_URL https://panic.archlinux.org/panic_report# \
diff --git a/linux-cachyos-deckify/PKGBUILD b/linux-cachyos-deckify/PKGBUILD
index acf20da9f..78cb3aa85 100644
--- a/linux-cachyos-deckify/PKGBUILD
+++ b/linux-cachyos-deckify/PKGBUILD
@@ -330,7 +330,7 @@ prepare() {
 
     echo "Selecting '$_use_llvm' LLVM level..."
 
-    if ! _is_lto_kernel; then
+    if [[ "$_use_llvm" = "none" || "$_use_llvm" = "clang" ]]; then
         echo "Enabling QR Code Panic for non-LTO Kernels"
         scripts/config --set-str DRM_PANIC_SCREEN qr_code -e DRM_PANIC_SCREEN_QR_CODE \
             --set-str DRM_PANIC_SCREEN_QR_CODE_URL https://panic.archlinux.org/panic_report# \
diff --git a/linux-cachyos-eevdf/PKGBUILD b/linux-cachyos-eevdf/PKGBUILD
index 7ab7689e8..1dd9e500d 100644
--- a/linux-cachyos-eevdf/PKGBUILD
+++ b/linux-cachyos-eevdf/PKGBUILD
@@ -333,7 +333,7 @@ prepare() {
 
     echo "Selecting '$_use_llvm' LLVM level..."
 
-    if ! _is_lto_kernel; then
+    if [[ "$_use_llvm" = "none" || "$_use_llvm" = "clang" ]]; then
         echo "Enabling QR Code Panic for non-LTO Kernels"
         scripts/config --set-str DRM_PANIC_SCREEN qr_code -e DRM_PANIC_SCREEN_QR_CODE \
             --set-str DRM_PANIC_SCREEN_QR_CODE_URL https://panic.archlinux.org/panic_report# \
diff --git a/linux-cachyos-hardened/PKGBUILD b/linux-cachyos-hardened/PKGBUILD
index f27115bd0..fface2054 100644
--- a/linux-cachyos-hardened/PKGBUILD
+++ b/linux-cachyos-hardened/PKGBUILD
@@ -330,7 +330,7 @@ prepare() {
 
     echo "Selecting '$_use_llvm' LLVM level..."
 
-    if ! _is_lto_kernel; then
+    if [[ "$_use_llvm" = "none" || "$_use_llvm" = "clang" ]]; then
         echo "Enabling QR Code Panic for non-LTO Kernels"
         scripts/config --set-str DRM_PANIC_SCREEN qr_code -e DRM_PANIC_SCREEN_QR_CODE \
             --set-str DRM_PANIC_SCREEN_QR_CODE_URL https://panic.archlinux.org/panic_report# \
diff --git a/linux-cachyos-lts/PKGBUILD b/linux-cachyos-lts/PKGBUILD
index 74afd634d..b9181f383 100644
--- a/linux-cachyos-lts/PKGBUILD
+++ b/linux-cachyos-lts/PKGBUILD
@@ -327,7 +327,7 @@ prepare() {
 
     echo "Selecting '$_use_llvm' LLVM level..."
 
-    if ! _is_lto_kernel; then
+    if [[ "$_use_llvm" = "none" || "$_use_llvm" = "clang" ]]; then
         echo "Enabling QR Code Panic for non-LTO Kernels"
         scripts/config --set-str DRM_PANIC_SCREEN qr_code -e DRM_PANIC_SCREEN_QR_CODE \
             --set-str DRM_PANIC_SCREEN_QR_CODE_URL https://panic.archlinux.org/panic_report# \
diff --git a/linux-cachyos-rc/PKGBUILD b/linux-cachyos-rc/PKGBUILD
index 93e94416d..60cd7edf6 100644
--- a/linux-cachyos-rc/PKGBUILD
+++ b/linux-cachyos-rc/PKGBUILD
@@ -374,7 +374,7 @@ prepare() {
 
     echo "Selecting '$_use_llvm' LLVM level..."
 
-    if ! _is_lto_kernel; then
+    if [[ "$_use_llvm" = "none" || "$_use_llvm" = "clang" ]]; then
         echo "Enabling QR Code Panic for non-LTO Kernels"
         scripts/config --set-str DRM_PANIC_SCREEN qr_code -e DRM_PANIC_SCREEN_QR_CODE \
             --set-str DRM_PANIC_SCREEN_QR_CODE_URL https://panic.archlinux.org/panic_report# \
diff --git a/linux-cachyos-rt-bore/PKGBUILD b/linux-cachyos-rt-bore/PKGBUILD
index 92fa42a4c..39b958a94 100644
--- a/linux-cachyos-rt-bore/PKGBUILD
+++ b/linux-cachyos-rt-bore/PKGBUILD
@@ -333,7 +333,7 @@ prepare() {
 
     echo "Selecting '$_use_llvm' LLVM level..."
 
-    if ! _is_lto_kernel; then
+    if [[ "$_use_llvm" = "none" || "$_use_llvm" = "clang" ]]; then
         echo "Enabling QR Code Panic for non-LTO Kernels"
         scripts/config --set-str DRM_PANIC_SCREEN qr_code -e DRM_PANIC_SCREEN_QR_CODE \
             --set-str DRM_PANIC_SCREEN_QR_CODE_URL https://panic.archlinux.org/panic_report# \
diff --git a/linux-cachyos-server/PKGBUILD b/linux-cachyos-server/PKGBUILD
index 5e24ff4ee..084b3939e 100644
--- a/linux-cachyos-server/PKGBUILD
+++ b/linux-cachyos-server/PKGBUILD
@@ -330,7 +330,7 @@ prepare() {
 
     echo "Selecting '$_use_llvm' LLVM level..."
 
-    if ! _is_lto_kernel; then
+    if [[ "$_use_llvm" = "none" || "$_use_llvm" = "clang" ]]; then
         echo "Enabling QR Code Panic for non-LTO Kernels"
         scripts/config --set-str DRM_PANIC_SCREEN qr_code -e DRM_PANIC_SCREEN_QR_CODE \
             --set-str DRM_PANIC_SCREEN_QR_CODE_URL https://panic.archlinux.org/panic_report# \
diff --git a/linux-cachyos/PKGBUILD b/linux-cachyos/PKGBUILD
index 2b2c57e18..b5557eb87 100644
--- a/linux-cachyos/PKGBUILD
+++ b/linux-cachyos/PKGBUILD
@@ -370,7 +370,7 @@ prepare() {
 
     echo "Selecting '$_use_llvm' LLVM level..."
 
-    if ! _is_lto_kernel; then
+    if [[ "$_use_llvm" = "none" || "$_use_llvm" = "clang" ]]; then
         echo "Enabling QR Code Panic for non-LTO Kernels"
         scripts/config --set-str DRM_PANIC_SCREEN qr_code -e DRM_PANIC_SCREEN_QR_CODE \
             --set-str DRM_PANIC_SCREEN_QR_CODE_URL https://panic.archlinux.org/panic_report# \

From 12d7b975451a2513331d4a22aca9ae3bc56eb7a8 Mon Sep 17 00:00:00 2001
From: Peter Jung <admin@ptr1337.dev>
Date: Sun, 16 Aug 2026 17:16:47 +0200
Subject: [PATCH 7/7] kernel: Change default to clang only

Signed-off-by: Peter Jung <admin@ptr1337.dev>
---
 linux-cachyos/PKGBUILD |  2 +-
 script-v3-v4.sh        | 13 +++++++------
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/linux-cachyos/PKGBUILD b/linux-cachyos/PKGBUILD
index b5557eb87..7aacff343 100644
--- a/linux-cachyos/PKGBUILD
+++ b/linux-cachyos/PKGBUILD
@@ -93,7 +93,7 @@
 # "thin": use Clang with ThinLTO - multiple threads, faster and uses less memory, may have a lower runtime performance than Full.
 # "thin-dist": use Clang with distributed ThinLTO - https://discourse.llvm.org/t/rfc-distributed-thinlto-build-for-kernel/85934
 # "full": use Clang with Full LTO - 1 thread for Linking, slow and uses more memory, theoretically with the highest performance gains.
-: "${_use_llvm:=thin}"
+: "${_use_llvm:=clang}"
 
 # Use suffix -lto only when requested by the user
 # yes - enable -lto suffix
diff --git a/script-v3-v4.sh b/script-v3-v4.sh
index cf5067471..51cb203de 100755
--- a/script-v3-v4.sh
+++ b/script-v3-v4.sh
@@ -17,8 +17,9 @@ find . -name "PKGBUILD" | xargs -I {} sed -i "s/_use_auto_optimization:=yes/_use
 find . -name "PKGBUILD" | xargs -I {} sed -i "s/_build_nvidia_open:=no/_build_nvidia_open:=yes/" {}
 ## Enable r8125 module
 find . -name "PKGBUILD" | xargs -I {} sed -i "s/_build_r8125:=no/_build_r8125:=yes/" {}
-## Disable clang-LTO
+## Select GCC without LTO
 set_llvm_level thin none
+set_llvm_level clang none
 
 ## GCC v3 Kernel
 
@@ -33,8 +34,8 @@ do
     cd ..
 done
 
-## LLVM ThinLTO v3 Kernel
-set_llvm_level none thin
+## Clang without LTO v3 Kernel
+set_llvm_level none clang
 
 files=$(find . -name "PKGBUILD")
 
@@ -54,7 +55,7 @@ RUST_LOG=trace repo-manage-util -p cachyos-v3 update
 RUST_LOG=trace repo-manage-util -p cachyos-v3 update
 
 ## GCC v4 Kernel
-set_llvm_level thin none
+set_llvm_level clang none
 find . -name "PKGBUILD" | xargs -I {} sed -i "s/_processor_opt:=GENERIC_V3/_processor_opt:=GENERIC_V4/" {}
 
 files=$(find . -name "PKGBUILD")
@@ -68,8 +69,8 @@ do
     cd ..
 done
 
-## LLVM ThinLTO v4 Kernel
-set_llvm_level none thin
+## Clang without LTO v4 Kernel
+set_llvm_level none clang
 
 files=$(find . -name "PKGBUILD")