reanimator/bee
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases 1 Wiki Activity

fix: use SYSSRC=common SYSOUT=amd64 for NVIDIA build on Debian split headers

Browse Source 
Debian 12 splits kernel headers into two packages:
  linux-headers-<kver>        (arch-specific: generated/, config/)
  linux-headers-<kver>-common (source headers: linux/, asm-generic/, etc.)

NVIDIA conftest.sh builds include paths as HEADERS=$SOURCES/include.
When SYSSRC=amd64, HEADERS=amd64/include/ which is nearly empty —
conftest can't compile any kernel header tests, all compile-tests fail
silently, and NVIDIA assumes all kernel APIs are present. This causes
link errors for APIs added in kernel 6.3+ (vm_flags_set, vm_flags_clear)
and removed APIs (phys_to_dma, dma_is_direct, get_dma_ops).

Fix: pass SYSSRC=common (real headers) and SYSOUT=amd64 (generated headers).
NVIDIA Makefile maps SYSSRC→NV_KERNEL_SOURCES, SYSOUT→NV_KERNEL_OUTPUT,
and runs 'make -C common KBUILD_OUTPUT=amd64'. Conftest then correctly
detects which APIs are present in kernel 6.1 and uses proper wrappers.

Tested: 5 .ko files built successfully on Debian 12 kernel 6.1.0-43-amd64.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Mikhail Chusavitin
2026-03-08 19:23:47 +03:00
parent c843ff95a2
commit 7c62d100d4
1 changed files with 17 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
iso/builder/build-nvidia-module.sh
View File

@@ -23,17 +23,24 @@ DEBIAN_KERNEL_ABI="$3"
[ -n "$DEBIAN_KERNEL_ABI" ] || { echo "usage: $0 <nvidia-version> <dist-dir> <debian-kernel-abi>"; exit 1; }
KVER="${DEBIAN_KERNEL_ABI}-amd64"
KDIR="/usr/src/linux-headers-${KVER}"
# On Debian, kernel headers are split into two packages:
# linux-headers-<kver> — arch-specific (generated, Makefile)
# linux-headers-<kver>-common — common source headers (linux/, asm-generic/, etc.)
# NVIDIA conftest needs SYSSRC pointing to common (for source headers like linux/mm.h)
# and SYSOUT pointing to amd64 (for generated headers like autoconf.h, asm/).
KDIR_ARCH="/usr/src/linux-headers-${KVER}"
KDIR_COMMON="/usr/src/linux-headers-${DEBIAN_KERNEL_ABI}-common"
echo "=== NVIDIA ${NVIDIA_VERSION} (proprietary) for kernel ${KVER} ==="
if [ ! -d "$KDIR" ]; then
if [ ! -d "$KDIR_ARCH" ] || [ ! -d "$KDIR_COMMON" ]; then
echo "=== installing linux-headers-${KVER} ==="
DEBIAN_FRONTEND=noninteractive apt-get install -y \
"linux-headers-${KVER}" \
gcc make perl
fi
echo "kernel headers: $KDIR"
echo "kernel headers (arch): $KDIR_ARCH"
echo "kernel headers (common): $KDIR_COMMON"
CACHE_DIR="${DIST_DIR}/nvidia-${NVIDIA_VERSION}-${KVER}"
if [ -d "$CACHE_DIR/modules" ] && [ -f "$CACHE_DIR/bin/nvidia-smi" ]; then
@@ -86,12 +93,16 @@ echo "kernel source: $KERNEL_SRC"
# Build kernel modules
# CFLAGS_MODULE: add GCC include dir so NVIDIA's nv_stdarg.h can find stdarg.h.
# Kernel build uses -nostdinc which strips GCC's own includes; we restore it here.
GCC_INCLUDES=$(gcc --print-file-name=include 2>/dev/null || echo "")
echo "=== building kernel modules ($(nproc) cores) ==="
cd "$KERNEL_SRC"
# SYSSRC=common: conftest finds real kernel headers (linux/mm.h etc.)
# SYSOUT=amd64: generated headers (autoconf.h, asm/) from arch package
# Without this split, conftest uses amd64/include/ which is nearly empty,
# all compile-tests fail silently, and NVIDIA assumes all APIs present → link errors.
make -j$(nproc) \
KERNEL_UNAME="$KVER" SYSSRC="$KDIR" \
CFLAGS_MODULE="${GCC_INCLUDES:+-I${GCC_INCLUDES}} -Wno-error" \
KERNEL_UNAME="$KVER" \
SYSSRC="$KDIR_COMMON" \
SYSOUT="$KDIR_ARCH" \
modules 2>&1 | tail -10
# Collect outputs