linux-yocto-rt, core-image-rt*: Explicitly skip when PREFERRED_PROVIDER_virtual/kernel isn't set to linux-yocto-rt

* just like linux-yocto-dev is doing
* fixes following errors in world builds:
  ERROR: Nothing PROVIDES 'linux-yocto-rt' (but /home/jenkins/oe/world/shr-core/openembedded-core/meta/recipes-rt/images/core-image-rt-sdk.bb DEPENDS on or otherwise requires it)
  ERROR: linux-yocto-rt was skipped: PREFERRED_PROVIDER_virtual/kernel set to linux-yocto, not linux-yocto-rt
  ERROR: linux-yocto-rt was skipped: PREFERRED_PROVIDER_virtual/kernel set to linux-yocto, not linux-yocto-rt
  ERROR: Required build target 'core-image-rt-sdk' has no buildable providers.
  Missing or unbuildable dependency chain was: ['core-image-rt-sdk', 'linux-yocto-rt']

  ERROR: Nothing PROVIDES 'linux-yocto-rt' (but /home/jenkins/oe/world/shr-core/openembedded-core/meta/recipes-rt/images/core-image-rt.bb DEPENDS on or otherwise requires it)
  ERROR: linux-yocto-rt was skipped: PREFERRED_PROVIDER_virtual/kernel set to linux-yocto, not linux-yocto-rt
  ERROR: linux-yocto-rt was skipped: PREFERRED_PROVIDER_virtual/kernel set to linux-yocto, not linux-yocto-rt
  ERROR: Required build target 'core-image-rt' has no buildable providers.
  Missing or unbuildable dependency chain was: ['core-image-rt', 'linux-yocto-rt']

(From OE-Core rev: 048c901fc32a1fd9a6c4b6f68f618101dfdf94ad)

(From OE-Core rev: 6ff8b98b6f176503671c651bacecef90dd9f4d89)

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Armin Kuster <akuster@mvista.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 16 insertions, 0 deletions

diff --git a/meta/recipes-rt/images/core-image-rt-sdk.bb b/meta/recipes-rt/images/core-image-rt-sdk.bb
index db7d581832..7ddf671bca 100644
--- a/meta/recipes-rt/images/core-image-rt-sdk.bb
+++ b/meta/recipes-rt/images/core-image-rt-sdk.bb
@@ -1,5 +1,13 @@
 require recipes-core/images/core-image-minimal.bb
 
+# Skip processing of this recipe if linux-yocto-rt is not explicitly specified as the
+# PREFERRED_PROVIDER for virtual/kernel. This avoids errors when trying
+# to build multiple virtual/kernel providers.
+python () {
+    if d.getVar("PREFERRED_PROVIDER_virtual/kernel", True) != "linux-yocto-rt":
+        raise bb.parse.SkipPackage("Set PREFERRED_PROVIDER_virtual/kernel to linux-yocto-rt to enable it")
+}
+
 DESCRIPTION = "Small image capable of booting a device with a test suite and \
 tools for real-time use. It includes the full meta-toolchain, development \
 headers and libraries to form a standalone SDK."
diff --git a/meta/recipes-rt/images/core-image-rt.bb b/meta/recipes-rt/images/core-image-rt.bb
index cab6f8b749..9c86f25335 100644
--- a/meta/recipes-rt/images/core-image-rt.bb
+++ b/meta/recipes-rt/images/core-image-rt.bb
@@ -1,5 +1,13 @@
 require recipes-core/images/core-image-minimal.bb
 
+# Skip processing of this recipe if linux-yocto-rt is not explicitly specified as the
+# PREFERRED_PROVIDER for virtual/kernel. This avoids errors when trying
+# to build multiple virtual/kernel providers.
+python () {
+    if d.getVar("PREFERRED_PROVIDER_virtual/kernel", True) != "linux-yocto-rt":
+        raise bb.parse.SkipPackage("Set PREFERRED_PROVIDER_virtual/kernel to linux-yocto-rt to enable it")
+}
+
 DESCRIPTION = "A small image just capable of allowing a device to boot plus a \
 real-time test suite and tools appropriate for real-time use."
 DEPENDS = "linux-yocto-rt"