From patchwork Tue Dec 10 10:06:17 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 13901205 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2DCD823DE88; Tue, 10 Dec 2024 10:06:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733825220; cv=none; b=EUB/ypdYvNsyMqdA2Sd1KoZ//Zy1paxoxlp+9y/x4GcIq2jTeM+VDK7Juxc7x3UQ1Mmf/gwhWxz5La3tMAJOTT8dWsj4k6hVi1lfVcWXmbVsZfJhUgFpm+Gm8npEQsxGqlR5hteVoMS/N2vUkxvbJRc4fz3tBzf36nRUn2bye10= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733825220; c=relaxed/simple; bh=S3XEXUDmkBmOooWN6DOpebqOCKHrXOqvVezVsx4571s=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=fpEuLj7T2NToQi0/1qmuuzdupq+byQFfBuZp9Y0QW+iOc2I8xBX/XMMfEc/dxCHvl6SjcB66Eixl3pnBlF9ZiLAWTZGFO42qjdbVvvaGmIS6/hgyjxWcY7IdIW80v6rfu/OAB1dPakyrvz1FtabqMYXfbDFMElS2FDdSDiGprM0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Bass0+DD; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Bass0+DD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B0317C4CED6; Tue, 10 Dec 2024 10:06:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1733825219; bh=S3XEXUDmkBmOooWN6DOpebqOCKHrXOqvVezVsx4571s=; h=From:To:Cc:Subject:Date:From; b=Bass0+DDxUgnKfDdCBiQj/BmWQ1ADeoqp5E+e0nqJ8OhpTbxW6YnOEcOMXkaLL1Bv tt8DIE5BnbeW/ibUveGb6siHc+u3pq5KZ5n6l3OR4iKAx8w66U7dEjBCzrFo0Lg8Kr 71aBnpC8y2vw04AmpeZv7VdalHibT4JJgP6NNRf+c/6DtD8ksCf1uj+RMQwqxOHA2+ p1B5+9Tb0CaCC/obPELqNiIKxJoDnZ7g40rTZt6J0pQqSernLULeIi0aoOOw1ziVrw B/1DJjGJXcU+BE8UwaMHDDKldo2xjmVWghhVojiX5fBBAneCvAw7v+dNI57uouI2+X KnyaPEMGojF6A== From: Masahiro Yamada To: linux-kbuild@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Masahiro Yamada , Nathan Chancellor , Nicolas Schier Subject: [PATCH v2] kbuild: refactor cross-compiling linux-headers package Date: Tue, 10 Dec 2024 19:06:17 +0900 Message-ID: <20241210100626.3384260-1-masahiroy@kernel.org> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kbuild@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Since commit 13b25489b6f8 ("kbuild: change working directory to external module directory with M="), when cross-building host programs for the linux-headers package, the "Entering directory" and "Leaving directory" messages appear multiple times, and each object path shown is relative to the working directory. This makes it difficult to track which objects are being rebuilt. In hindsight, using the external module build (M=) was not a good idea. This commit simplifies the script by leveraging the run-command target, resulting in a cleaner build log again. [Before] $ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- bindeb-pkg [ snip ] Rebuilding host programs with aarch64-linux-gnu-gcc... make[5]: Entering directory '/home/masahiro/linux' make[6]: Entering directory '/home/masahiro/linux/debian/linux-headers-6.13.0-rc1+/usr/src/linux-headers-6.13.0-rc1+' HOSTCC scripts/kallsyms HOSTCC scripts/sorttable HOSTCC scripts/asn1_compiler make[6]: Leaving directory '/home/masahiro/linux/debian/linux-headers-6.13.0-rc1+/usr/src/linux-headers-6.13.0-rc1+' make[5]: Leaving directory '/home/masahiro/linux' make[5]: Entering directory '/home/masahiro/linux' make[6]: Entering directory '/home/masahiro/linux/debian/linux-headers-6.13.0-rc1+/usr/src/linux-headers-6.13.0-rc1+' HOSTCC scripts/basic/fixdep HOSTCC scripts/mod/modpost.o HOSTCC scripts/mod/file2alias.o HOSTCC scripts/mod/sumversion.o HOSTCC scripts/mod/symsearch.o HOSTLD scripts/mod/modpost make[6]: Leaving directory '/home/masahiro/linux/debian/linux-headers-6.13.0-rc1+/usr/src/linux-headers-6.13.0-rc1+' make[5]: Leaving directory '/home/masahiro/linux' [After] $ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- bindeb-pkg [ snip ] HOSTCC debian/linux-headers-6.13.0-rc1+/usr/src/linux-headers-6.13.0-rc1+/scripts/basic/fixdep HOSTCC debian/linux-headers-6.13.0-rc1+/usr/src/linux-headers-6.13.0-rc1+/scripts/kallsyms HOSTCC debian/linux-headers-6.13.0-rc1+/usr/src/linux-headers-6.13.0-rc1+/scripts/sorttable HOSTCC debian/linux-headers-6.13.0-rc1+/usr/src/linux-headers-6.13.0-rc1+/scripts/asn1_compiler HOSTCC debian/linux-headers-6.13.0-rc1+/usr/src/linux-headers-6.13.0-rc1+/scripts/mod/modpost.o HOSTCC debian/linux-headers-6.13.0-rc1+/usr/src/linux-headers-6.13.0-rc1+/scripts/mod/file2alias.o HOSTCC debian/linux-headers-6.13.0-rc1+/usr/src/linux-headers-6.13.0-rc1+/scripts/mod/sumversion.o HOSTCC debian/linux-headers-6.13.0-rc1+/usr/src/linux-headers-6.13.0-rc1+/scripts/mod/symsearch.o HOSTLD debian/linux-headers-6.13.0-rc1+/usr/src/linux-headers-6.13.0-rc1+/scripts/mod/modpost Signed-off-by: Masahiro Yamada --- Changes in v2: - Fix build error with O= scripts/package/install-extmod-build | 32 +++++++--------------------- 1 file changed, 8 insertions(+), 24 deletions(-) diff --git a/scripts/package/install-extmod-build b/scripts/package/install-extmod-build index d3c5b104c063..81f5b24b09a3 100755 --- a/scripts/package/install-extmod-build +++ b/scripts/package/install-extmod-build @@ -49,17 +49,10 @@ mkdir -p "${destdir}" # This caters to host programs that participate in Kbuild. objtool and # resolve_btfids are out of scope. if [ "${CC}" != "${HOSTCC}" ]; then - echo "Rebuilding host programs with ${CC}..." - - # This leverages external module building. - # - Clear sub_make_done to allow the top-level Makefile to redo sub-make. - # - Filter out --no-print-directory to print "Entering directory" logs - # when Make changes the working directory. - unset sub_make_done - MAKEFLAGS=$(echo "${MAKEFLAGS}" | sed s/--no-print-directory//) - - cat <<-'EOF' > "${destdir}/Kbuild" - subdir-y := scripts + cat "${destdir}/scripts/Makefile" - <<-'EOF' > "${destdir}/scripts/Kbuild" + subdir-y += basic + hostprogs-always-y += mod/modpost + mod/modpost-objs := $(addprefix mod/, modpost.o file2alias.o sumversion.o symsearch.o) EOF # HOSTCXX is not overridden. The C++ compiler is used to build: @@ -67,20 +60,11 @@ if [ "${CC}" != "${HOSTCC}" ]; then # - GCC plugins, which will not work on the installed system even after # being rebuilt. # - # Use the single-target build to avoid the modpost invocation, which - # would overwrite Module.symvers. - "${MAKE}" HOSTCC="${CC}" KBUILD_OUTPUT=. KBUILD_EXTMOD="${destdir}" scripts/ + # Clear VPATH and srcroot because the source files reside in the output + # directory + "${MAKE}" run-command KBUILD_RUN_COMMAND='+$(MAKE) HOSTCC=$(CC) VPATH= srcroot=. $(build)='"${destdir}"/scripts - cat <<-'EOF' > "${destdir}/scripts/Kbuild" - subdir-y := basic - hostprogs-always-y := mod/modpost - mod/modpost-objs := $(addprefix mod/, modpost.o file2alias.o sumversion.o symsearch.o) - EOF - - # Run once again to rebuild scripts/basic/ and scripts/mod/modpost. - "${MAKE}" HOSTCC="${CC}" KBUILD_OUTPUT=. KBUILD_EXTMOD="${destdir}" scripts/ - - rm -f "${destdir}/Kbuild" "${destdir}/scripts/Kbuild" + rm -f "${destdir}/scripts/Kbuild" fi find "${destdir}" \( -name '.*.cmd' -o -name '*.o' \) -delete