[OE-core] [PATCH] kernel: yocto: Add dependency on do_prepare_recipe_sysroot

[Bruce Ashfield]

On 08/22/2018 10:05 AM, Lukasz Majewski wrote:
> Hi Bruce,
> 
>> On 08/22/2018 09:40 AM, Lukasz Majewski wrote:
>>> Without this patch it happens that do_populate_recipe_sysroot is
>>> called just before do_compile (on multi core build machines).
>>> This is way too late as the .config generated in
>>> do_kernel_configme() is already broken.
>>>
>>> The problem is that do_kernel_configme() calls native's
>>> merge_config.sh script which may call bison and arm-linux-*-gcc to
>>> compile kconfig infrastructure to create base .config
>>> (scripts/kconfig/conf  --allnoconfig Kconfig.)
>>>
>>> It turns out that we only got above binaries after
>>> do_prepare_recipe_sysroot() is called.
>>> If those binaries are not available, the merge_config.sh do not
>>> generate base .config and without any error produces
>>> malfunctioned .config. The build process continues and as a result
>>> broken kernel is compiled.
>>>
>>> To reproduce:
>>>
>>> bitbake -c cleansstate virtual/kernel
>>> bitbake -c kernel_metadata -v virtual/kernel
>>> bitbake -c do_kernel_configme -v virtual/kernel
>>> (one shall see broken .config in ${B}/.config)
>>> bitbake -c do_populate_sysroot -v virtual/kernel
>>> bitbake -c do_compile -v virtual/kernel
>>>
>>> (Poky) SHA1: bb91b2ae3ee5cf108aa2f9b78abb14d5aa00831d
>>>
>>> Signed-off-by: Lukasz Majewski <lukma at denx.de>
>>> ---
>>>    meta/classes/kernel-yocto.bbclass | 1 +
>>>    1 file changed, 1 insertion(+)
>>>
>>> diff --git a/meta/classes/kernel-yocto.bbclass
>>> b/meta/classes/kernel-yocto.bbclass index 4ac3a39e47..19a3f2bc46
>>> 100644 --- a/meta/classes/kernel-yocto.bbclass
>>> +++ b/meta/classes/kernel-yocto.bbclass
>>> @@ -276,6 +276,7 @@ do_kernel_metadata[depends] =
>>> "kern-tools-native:do_populate_sysroot"
>>> do_validate_branches[depends] =
>>> "kern-tools-native:do_populate_sysroot" do_kernel_configme[dirs] +=
>>> "${S} ${B}" +do_kernel_configme[depends] +=
>>> "virtual/kernel:do_prepare_recipe_sysroot"
>>
>> On a closer look .. what branch is this from ? We already have a
>> change that triggered breakage on 4.17+ that should fix this.
>>
>> i.e. commit ff1bdd75d50f0ebac3d599e461685ace29559a82 in oe-core, adds:
>>
>> ----------
>>
>>    do_kernel_metadata[depends] =
>> "kern-tools-native:do_populate_sysroot" do_validate_branches[depends]
>> = "kern-tools-native:do_populate_sysroot"
>>
>> +do_kernel_configme[depends] +=
>> "virtual/${TARGET_PREFIX}binutils:do_populate_sysroot"
>> +do_kernel_configme[depends] +=
>> "virtual/${TARGET_PREFIX}gcc:do_populate_sysroot"
>> +do_kernel_configme[depends] += "bc-native:do_populate_sysroot
>> bison-native:do_populate_sysroot"
>>    do_kernel_configme[dirs] += "${S} ${B}"
>>    do_kernel_configme() {
>>
>> ----------
>>
>> Which I don't see in the context of your patch.
>>
> 
> I do use poky as in the commit message.

Yes, I checked that .. but that isn't a useful part of a patch
to oe-core.

The kernel-yocto bbclass in that context is not the one in master, and
if I run a --contains on that commit ID, I don't get an active
branch.

So the patch as it stands, cannot be applied to master (and I
also checked master-next in case something snuck in that I
missed) of oe-core or poky, so there's no way to work with it.

Bruce

> 
> Regarding the kernel - I do have my own recipe;
> inherit kernel
> 
> require
> recipes-kernel/linux/linux-yocto.inc
> 
> 
> And then I do have:
> COMPATIBLE_MACHINE_display5 = "display5"
> 
> KBUILD_DEFCONFIG_pn-linux-yocto-custom_display5 =
> "imx6q_display5_defconfig"
> 
> As the board is in mainline I just point to Linus tree.
> 
>> Bruce
>>
>>>    do_kernel_configme() {
>>>    	set +e
>>>    
>>>    
>>
> 
> 
> 
> 
> Best regards,
> 
> Lukasz Majewski
> 
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> 
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