[yocto] [OE-core][yocto-kernel-tools][PATCH] merge_configs.sh: fail loudly if make also fails

[Ioan-Adrian Ratiu]

On Mon, 29 Aug 2016, Bruce Ashfield <bruce.ashfield at windriver.com> wrote:
> On 2016-08-29 08:07 AM, Bruce Ashfield wrote:
>>
>>
>> On Mon, Aug 29, 2016 at 5:19 AM, Ioan-Adrian Ratiu <adrian.ratiu at ni.com
>> <mailto:adrian.ratiu at ni.com>> wrote:
>>
>>     merge_configs.sh calls make on the generated kernel config from
>>     the defconfig + fragments to fill in any missing symbols. make
>>     can fail and this can lead to nasty errors further on in the
>>     build like generating an unbootable kernel image.
>>
>>     Check the make return code and fail loudly if non-zero.
>>
>>
>> We don't want merge config to fail in a scenario like this. It is up to
>> whatever
>> calls merge_config to add that sort of logic. Which is what I do with
>> the kernel
>> audit phase of linux-yocto.
>
> I saw the other patch after replying here. So this is causing some sort
> of non Kconfig related error (i.e. host contamination) ? If so, that is
> a different scenario than I was thinking of when I wrote this.

Yes, exactly.

>
> Either way, like I said in my other email, I'd like to understand why
> this is popping up now, since I'm not seeing anything like it in my
> builds .. with my recent changes, all that I've essentially done is
> expose merge_config to the actual tasks, so if this is showing an error
> I jiggled something else, or it was always around.

It was always around, even before the cleanup you did in this area .
Remember I sent you a year ago patches for this issue when you were on
vacation and you told me you didn't need that patch?

These patches are a rebase on top of the current master of those from
a year ago. This issue is around since the sysroot poisoning commit back
in 2014.

>
> Bruce
>
>>
>> If you do want to try and make it fail in a scenario like this, the
>> patch needs to
>> go to the linux kernel mailing list.
>>
>> Cheers,
>>
>> Bruce
>>
>>
>>
>>     Signed-off-by: Ioan-Adrian Ratiu <adrian.ratiu at ni.com
>>     <mailto:adrian.ratiu at ni.com>>
>>     ---
>>      tools/merge_config.sh | 5 ++++-
>>      1 file changed, 4 insertions(+), 1 deletion(-)
>>
>>     diff --git a/tools/merge_config.sh b/tools/merge_config.sh
>>     index 67d1314..5212f37 100755
>>     --- a/tools/merge_config.sh
>>     +++ b/tools/merge_config.sh
>>     @@ -152,7 +152,10 @@ fi
>>      # alldefconfig: Fills in any missing symbols with Kconfig default
>>      # allnoconfig: Fills in any missing symbols with # CONFIG_* is not set
>>      make KCONFIG_ALLCONFIG=$TMP_FILE $OUTPUT_ARG $ALLTARGET
>>     -
>>     +if [ "$?" -ne 0 ]; then
>>     +    echo "Make failed to fill missing config symbols. Exit." >&2
>>     +    exit 1
>>     +fi
>>
>>
>>      # Check all specified config values took (might have
>>     missed-dependency issues)
>>      for CFG in $(sed -n "$SED_CONFIG_EXP" $TMP_FILE); do
>>     --
>>     2.9.3
>>
>>
>>
>>
>> --
>> "Thou shalt not follow the NULL pointer, for chaos and madness await
>> thee at its end"
>>
>>