[PATCH v2 1/3] module.inc: fix kbuild dependency

[Adriaan Schmidt <adriaan.schmidt@siemens.com>]

This achieves two things:

* Module builds explicitly depend on linux-kbuild-* as build dependency.
  Previously we only had an implicit RDEPENDS in linux-custom, which is
  not sufficient. For linux-distro, this means we need to PROVIDE linux-kbuild.
* Remove the unconditional building of native kbuild when it is
  not needed, i.e. when we're not actually cross-building a module

Signed-off-by: Adriaan Schmidt <adriaan.schmidt@siemens.com>
---
 meta-isar/recipes-kernel/example-module/example-module.bb | 2 ++
 meta/recipes-kernel/linux-module/module.inc               | 3 ++-
 meta/recipes-kernel/linux/linux-custom.inc                | 3 ---
 meta/recipes-kernel/linux/linux-distro.bb                 | 1 +
 4 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/meta-isar/recipes-kernel/example-module/example-module.bb b/meta-isar/recipes-kernel/example-module/example-module.bb
index 22f3cc47..d486470d 100644
--- a/meta-isar/recipes-kernel/example-module/example-module.bb
+++ b/meta-isar/recipes-kernel/example-module/example-module.bb
@@ -12,3 +12,5 @@ SRC_URI += "file://src"
 S = "${WORKDIR}/src"
 
 AUTOLOAD = "example-module"
+
+ISAR_CROSS_COMPILE = "0"
\ No newline at end of file
diff --git a/meta/recipes-kernel/linux-module/module.inc b/meta/recipes-kernel/linux-module/module.inc
index eddbf177..1cca9cfb 100644
--- a/meta/recipes-kernel/linux-module/module.inc
+++ b/meta/recipes-kernel/linux-module/module.inc
@@ -17,7 +17,8 @@ PN .= "-${KERNEL_NAME}"
 
 KERNEL_IMAGE_PKG ??= "linux-image-${KERNEL_NAME}"
 KERNEL_HEADERS_PKG ??= "linux-headers-${KERNEL_NAME}"
-DEPENDS += "${KERNEL_HEADERS_PKG}"
+KERNEL_KBUILD_PKG ??= "linux-kbuild-${KERNEL_NAME}"
+DEPENDS += "${KERNEL_HEADERS_PKG} ${KERNEL_KBUILD_PKG}-native"
 DEBIAN_BUILD_DEPENDS = "${KERNEL_HEADERS_PKG}"
 
 SIGNATURE_KEYFILE ??= ""
diff --git a/meta/recipes-kernel/linux/linux-custom.inc b/meta/recipes-kernel/linux/linux-custom.inc
index 0d222332..35c61187 100644
--- a/meta/recipes-kernel/linux/linux-custom.inc
+++ b/meta/recipes-kernel/linux/linux-custom.inc
@@ -148,9 +148,6 @@ PROVIDES += "${RECIPE_PROVIDES}"
 # Append build profiles
 DEB_BUILD_PROFILES += "${BUILD_PROFILES}"
 
-# Add dependency to build -kbuildtarget and -native automatically
-RDEPENDS:append:cross-profile = " ${BPN}-native"
-
 def get_kernel_arch(d):
     distro_arch = d.getVar("DISTRO_ARCH")
     if distro_arch in ["amd64", "i386"]:
diff --git a/meta/recipes-kernel/linux/linux-distro.bb b/meta/recipes-kernel/linux/linux-distro.bb
index bc43528c..13b8dc7e 100644
--- a/meta/recipes-kernel/linux/linux-distro.bb
+++ b/meta/recipes-kernel/linux/linux-distro.bb
@@ -10,6 +10,7 @@ python() {
     for kernel in distro_kernels.split():
         d.appendVar('PROVIDES', ' linux-image-' + kernel)
         d.appendVar('PROVIDES', ' linux-headers-' + kernel)
+        d.appendVar('PROVIDES', ' linux-kbuild-' + kernel)
     if d.getVar('KERNEL_IMAGE_PKG'):
         d.appendVar('PROVIDES', ' ' + d.getVar('KERNEL_IMAGE_PKG'))
     if d.getVar('KERNEL_HEADERS_PKG'):
-- 
2.39.2