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

[Lukasz Majewski]

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"
 do_kernel_configme() {
 	set +e
 
-- 
2.11.0