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The commit a9f11849 [linux-yocto: explicitly export KMETA to scripts] allows the meta branch name to be changed by exporting it to all phases of the build. But if a custom kernel without a meta branch is built, we end up passing an empty string to the creation scripts, which breaks the build since input is expected. Inhibiting the export of KMETA to the creation scripts when empty fixes the problem. (From OE-Core rev: 61162fbe01993659301fe2e821bf9c3e801206d8) Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com> Signed-off-by: Saul Wold <sgw@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>