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kbuild: deb-pkg: add pkg.linux-upstream.nokernelheaders build profile

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Since commit f1d87664b8 ("kbuild: cross-compile linux-headers package
when possible"), 'make bindeb-pkg' may attempt to cross-compile the
linux-headers package, but it fails under certain circumstances.

For example, when CONFIG_MODULE_SIG_FORMAT is enabled on Debian, the
following command fails:

  $ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- bindeb-pkg
      [ snip ]
  Rebuilding host programs with aarch64-linux-gnu-gcc...
    HOSTCC  debian/linux-headers-6.12.0-rc4/usr/src/linux-headers-6.12.0-rc4/scripts/kallsyms
    HOSTCC  debian/linux-headers-6.12.0-rc4/usr/src/linux-headers-6.12.0-rc4/scripts/sorttable
    HOSTCC  debian/linux-headers-6.12.0-rc4/usr/src/linux-headers-6.12.0-rc4/scripts/asn1_compiler
    HOSTCC  debian/linux-headers-6.12.0-rc4/usr/src/linux-headers-6.12.0-rc4/scripts/sign-file
  In file included from /usr/include/openssl/opensslv.h:109,
                   from debian/linux-headers-6.12.0-rc4/usr/src/linux-headers-6.12.0-rc4/scripts/sign-file.c:25:
  /usr/include/openssl/macros.h:14:10: fatal error: openssl/opensslconf.h: No such file or directory
     14 | #include <openssl/opensslconf.h>
        |          ^~~~~~~~~~~~~~~~~~~~~~~
  compilation terminated.

This commit adds a new profile, pkg.linux-upstream.nokernelheaders, to
guard the linux-headers package.

There are two options to fix the above issue.

Option 1: Set the pkg.linux-upstream.nokernelheaders build profile

  $ DEB_BUILD_PROFILES=pkg.linux-upstream.nokernelheaders \
    make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- bindeb-pkg

This skips the building of the linux-headers package.

Option 2: Install the necessary build dependencies

If you want to cross-compile the linux-headers package, you need to
install additional packages.

For example, on Debian, the packages necessary for cross-compiling it
to arm64 can be installed with the following commands:

  # dpkg --add-architecture arm64
  # apt update
  # apt install gcc-aarch64-linux-gnu libssl-dev:arm64

Fixes: f1d87664b8 ("kbuild: cross-compile linux-headers package when possible")
Reported-by: Ron Economos <re@w6rz.net>
Closes: https://lore.kernel.org/all/b3d4f49e-7ddb-29ba-0967-689232329b53@w6rz.net/
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Tested-by: Ron Economos <re@w6rz.net>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
This commit is contained in:
Masahiro Yamada 2024-10-23 03:16:58 +09:00
parent cb08a02659
commit e2c318225a
3 changed files with 11 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
scripts/package/builddeb
View File

@ -123,7 +123,7 @@ install_kernel_headers () {
pdir=debian/$1
version=${1#linux-headers-}
"${srctree}/scripts/package/install-extmod-build" "${pdir}/usr/src/linux-headers-${version}"
CC="${DEB_HOST_GNU_TYPE}-gcc" "${srctree}/scripts/package/install-extmod-build" "${pdir}/usr/src/linux-headers-${version}"
mkdir -p $pdir/lib/modules/$version/
ln -s /usr/src/linux-headers-$version $pdir/lib/modules/$version/build

6
scripts/package/install-extmod-build
View File

@ -44,13 +44,11 @@ mkdir -p "${destdir}"
fi
} | tar -c -f - -T - | tar -xf - -C "${destdir}"
# When ${CC} and ${HOSTCC} differ, we are likely cross-compiling. Rebuild host
# programs using ${CC}. This assumes CC=${CROSS_COMPILE}gcc, which is usually
# the case for package building. It does not cross-compile when CC=clang.
# When ${CC} and ${HOSTCC} differ, rebuild host programs using ${CC}.
#
# This caters to host programs that participate in Kbuild. objtool and
# resolve_btfids are out of scope.
if [ "${CC}" != "${HOSTCC}" ] && is_enabled CONFIG_CC_CAN_LINK; then
if [ "${CC}" != "${HOSTCC}" ]; then
echo "Rebuilding host programs with ${CC}..."
cat <<-'EOF' > "${destdir}/Kbuild"

9
scripts/package/mkdebian
View File

@ -179,6 +179,8 @@ fi
echo $debarch > debian/arch
host_gnu=$(dpkg-architecture -a "${debarch}" -q DEB_HOST_GNU_TYPE | sed 's/_/-/g')
# Generate a simple changelog template
cat <<EOF > debian/changelog
$sourcename ($packageversion) $distribution; urgency=low
@ -196,7 +198,11 @@ Priority: optional
Maintainer: $maintainer
Rules-Requires-Root: no
Build-Depends: debhelper-compat (= 12)
Build-Depends-Arch: bc, bison, cpio, flex, kmod, libelf-dev:native, libssl-dev:native, rsync
Build-Depends-Arch: bc, bison, cpio, flex,
gcc-${host_gnu} <!pkg.${sourcename}.nokernelheaders>,
kmod, libelf-dev:native,
libssl-dev:native, libssl-dev <!pkg.${sourcename}.nokernelheaders>,
rsync
Homepage: https://www.kernel.org/
Package: $packagename-$version
@ -224,6 +230,7 @@ cat <<EOF >> debian/control
Package: linux-headers-$version
Architecture: $debarch
Build-Profiles: <!pkg.${sourcename}.nokernelheaders>
Description: Linux kernel headers for $version on $debarch
This package provides kernel header files for $version on $debarch
.