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kbuild: deb-pkg: improve the usability of source package

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Improve the source package support in case the dpkg-buildpackage is
directly used to build binary packages.

For cross-compiling, you can set CROSS_COMPILE via the environment
variable, but it is better to set it automatically - set it to
${DEB_HOST_GNU_TYPE}- if we are cross-compiling but not from the top
Makefile.

The generated source package may be carried to a different build
environment, which may have a different compiler installed.
Run olddefconfig first to set new CONFIG options to their default
values without prompting.

Take KERNELRELEASE and KBUILD_BUILD_VERSION from the version field of
debian/changelog in case it is updated afterwards.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Masahiro Yamada 2023-02-15 10:20:33 +09:00
parent c5bf2efb05
commit 3ab18a625c
2 changed files with 20 additions and 5 deletions
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16
scripts/package/deb-build-option Executable file
View File

@ -0,0 +1,16 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0-only
# Set up CROSS_COMPILE if we are cross-compiling, but not called from the
# kernel toplevel Makefile
if [ -z "${CROSS_COMPILE}${cross_compiling}" -a "${DEB_HOST_ARCH}" != "${DEB_BUILD_ARCH}" ]; then
echo CROSS_COMPILE=${DEB_HOST_GNU_TYPE}-
fi
version=$(dpkg-parsechangelog -S Version)
version_upstream="${version%-*}"
debian_revision="${version#${version_upstream}}"
debian_revision="${debian_revision#*-}"
echo KERNELRELEASE=${version_upstream}
echo KBUILD_BUILD_VERSION=${debian_revision}

9
scripts/package/mkdebian
View File

@ -90,10 +90,8 @@ rm -rf debian
version=$KERNELRELEASE
if [ -n "$KDEB_PKGVERSION" ]; then
packageversion=$KDEB_PKGVERSION
revision=${packageversion##*-}
else
revision=$($srctree/init/build-version)
packageversion=$version-$revision
packageversion=$version-$($srctree/init/build-version)
fi
sourcename=${KDEB_SOURCENAME:-linux-upstream}
@ -244,8 +242,9 @@ srctree ?= .
build-indep:
build-arch:
\$(MAKE) KERNELRELEASE=${version} ARCH=${ARCH} \
KBUILD_BUILD_VERSION=${revision} -f \$(srctree)/Makefile
\$(MAKE) -f \$(srctree)/Makefile ARCH=${ARCH} \
\$(shell \$(srctree)/scripts/package/deb-build-option) \
olddefconfig all
build: build-arch