u-boot-qoriq: Document the multilib toolchain block

The block raises SkipPackage/SkipRecipe when the machine override needs a
multilib cross toolchain that MULTILIB_VARIANTS does not build. Only a
parse-time raise can drop a recipe, and COMPATIBLE_MACHINE matches machine
tokens, not multilib configuration. TOOLCHAIN_OPTIONS and WRAP_TARGET_PREFIX
feed EXTRA_OEMAKE from the recipe datastore, so a task cannot carry them.

Signed-off-by: Luciano Dittgen <luciano.dittgen@ossystems.com.br>

1 files changed, 3 insertions, 0 deletions

diff --git a/recipes-bsp/u-boot/u-boot-qoriq_2025.04.bb b/recipes-bsp/u-boot/u-boot-qoriq_2025.04.bb
index 2dd3c782a..3375a01de 100644
--- a/recipes-bsp/u-boot/u-boot-qoriq_2025.04.bb
+++ b/recipes-bsp/u-boot/u-boot-qoriq_2025.04.bb
@@ -39,6 +39,9 @@ inherit fsl-u-boot-localversion
 B = "${UNPACKDIR}/build"
 LOCALVERSION = "+fsl"
 
+# A machine in this family needs a multilib cross toolchain. When the
+# configuration builds none, only a parse-time raise can drop the recipe.
+# nooelint: oelint.task.noanonpython
 python () {
     if d.getVar("TCMODE") == "external-fsl":
         return