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kbuild: install-extmod-build: Fix build when specifying KBUILD_OUTPUT

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Since commit 5f73e7d0386d ("kbuild: refactor cross-compiling
linux-headers package"), the linux-headers pacman package fails
to build when "O=" is set. The build system complains:

/mnt/chroot/linux/scripts/Makefile.build:41: mnt/chroots/linux-mainline/pacman/linux-upstream/pkg/linux-upstream-headers/usr//lib/modules/6.14.0-rc3-00350-g771dba31fffc/build/scripts/Makefile: No such file or directory

This is because the "srcroot" variable is set to "." and the
"build" variable is set to the absolute path. This makes the
"src" variables point to wrong directory.

Change the "build" variable to a relative path to "." to
fix build.

Fixes: 5f73e7d0386d ("kbuild: refactor cross-compiling linux-headers package")
Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Inochi Amaoto 2025-03-06 14:39:51 +08:00 committed by Masahiro Yamada
parent dd0b7d4a56
commit b5e3956535
1 changed files with 1 additions and 1 deletions
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2
scripts/package/install-extmod-build
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@ -63,7 +63,7 @@ if [ "${CC}" != "${HOSTCC}" ]; then
# Clear VPATH and srcroot because the source files reside in the output
# directory.
# shellcheck disable=SC2016 # $(MAKE) and $(build) will be expanded by Make
"${MAKE}" run-command KBUILD_RUN_COMMAND='+$(MAKE) HOSTCC='"${CC}"' VPATH= srcroot=. $(build)='"${destdir}"/scripts
"${MAKE}" run-command KBUILD_RUN_COMMAND='+$(MAKE) HOSTCC='"${CC}"' VPATH= srcroot=. $(build)='"$(realpath --relative-base=. "${destdir}")"/scripts
rm -f "${destdir}/scripts/Kbuild"
fi