[U-Boot] Broken target

[Otavio Salvador]

The 'tools-only' target seems to be broken.

In a clean tree (no previous build) running:

$: make tools-only

fails with:

  CHK     include/config/uboot.release
/bin/sh: 1: cannot open include/config/auto.conf: No such file
Makefile:1049: recipe for target 'include/config/uboot.release' failed
make: *** [include/config/uboot.release] Error 2

Any idea about the root cause? it is a regression as 2014.07 works
fine in this case.

-- 
Otavio Salvador                             O.S. Systems
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