[Buildroot] strange issue with gcc 4.9.2

[bruce bushby]

Hello

I'm struggling with an strange problem when building with any of the last 3
versions of buildroot and more specifically gcc 4.9.2

Perhaps this doesn't have anything to do with buildroot, but I thought I
would mention in case other are having the a similar issue.

I'm running on an AllWinner A13 processor.

When I use buildroot 2014.08 (gcc 4.9.1) ....everything is 100%, I am able
to compile my uboot and the resulting "u-boot-sunxi-with-spl.bin"  executes
without any problems.

However, from buildroot 2014.11 (gcc 4.9.2) onwards, the uboot appears to
compile cleanly and is even the same size ...but it will not boot, after
powering on the board I don't see anything, nothing written to the console
etc. My builds are all scripted using the exact same defconfig, but any
spl-uboot compiled with gcc4.9.2 cd ou
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