linux-kernel - Re: [question] KBUILD_OUTPUT and modules install (with INSTALL_MOD

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Message-ID: <27B16959-58F6-4190-8A65-88FFD2A49452@public-files.de>
Date:   Tue, 15 Sep 2020 07:42:38 +0200
From:   Frank Wunderlich <frank-w@...lic-files.de>
To:     Masahiro Yamada <masahiroy@...nel.org>
CC:     Michal Marek <michal.lkml@...kovi.net>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [question] KBUILD_OUTPUT and modules install (with INSTALL_MOD_PATH)

Am 15. September 2020 04:56:55 MESZ schrieb Masahiro Yamada <masahiroy@...nel.org>:
>On Tue, Sep 15, 2020 at 2:57 AM Frank Wunderlich

>> i try to use modules_install target after building kernel with
>KBUILD_OUTPUT set
>>
>> KBUILD_OUTPUT: /media/data_nvme/git/kernel/build #kernel source is in
>/media/data_nvme/git/kernel/BPI-R2-4.14
>>
>> kernel is build successfully, but i fail on running the make
>modules_install target
>>
>>   ERROR: Kernel configuration is invalid.
>>          include/generated/autoconf.h or include/config/auto.conf are
>missing.
>>          Run 'make oldconfig && make prepare' on kernel src to fix
>it.
>>
>> Makefile:648: include/config/auto.conf: No such file or directory
>> make: *** [Makefile:719: include/config/auto.conf] Error 1
>>
>> it looks it is ignoring the KBUILD_OUTPUT variable, as both files are
>present
>
>
>KBUILD_OUTPUT is an environment variable.
>
>Did you set (export) it
>before doing 'make modules_install'?

Yes i exported it before use at beginning of my script [1] and modules_install used inside install function [2]. It works with build-function [3].
As the script is big i linked the relevant parts...i checked KBUILD_OUTPUT at beginning of install function so i'm sure it was set

>> $ ls /media/data_nvme/git/kernel/build/include/config/auto.conf
>> /media/data_nvme/git/kernel/build/include/config/auto.conf
>> $ ls /media/data_nvme/git/kernel/build/include/generated/autoconf.h
>> /media/data_nvme/git/kernel/build/include/generated/autoconf.h


[1] https://github.com/frank-w/BPI-R2-4.14/blob/5.9-rc/build.sh#L75
[2] https://github.com/frank-w/BPI-R2-4.14/blob/5.9-rc/build.sh#L368
[3] https://github.com/frank-w/BPI-R2-4.14/blob/5.9-rc/build.sh#L578
regards Frank