Re: [PATCH] kernel: yocto: Add dependency on do_prepare_recipe_sysroot

[Lukasz Majewski <lukma@denx.de>]

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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
> >   
> 
> I already have a queue of changes for the 4.18 kernel that has a
> similar tweak.
> 
> I'll double check the use case above, and if it isn't already
> fixed, I'll add this to my queue.

One more strange observation the merge_config.sh shall use -native
binaries (like bison, gcc, etc).

Unfortunately, in my case it depends on target ones (as we do have
CFLAGS = .... ARCH=arm ... merge_configs.sh).

The bitbake -g -u taskexp virtual/kernel shows however that we do
depend on native bison.

To provide target ones - I do need the do_prepare_recipe_sysroot() to
call before do_configure.

> 
> Bruce
> 
> > (Poky) SHA1: bb91b2ae3ee5cf108aa2f9b78abb14d5aa00831d
> > 
> > Signed-off-by: Lukasz Majewski <lukma@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" do_kernel_configme() {
> >   	set +e
> >   
> >   
> 




Best regards,

Lukasz Majewski

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