Hello,

Most VxWorks programs refer to kernel services at some point, and these
often end up too far away for short calls on powerpc.

This patch, originally contributed by Doug, arranges to request linker
relaxation by default for RTPs. This helps many programs transparently,
the feature has been available in binutils for a long time now and is
more precise than -mlongcall at compile time.

We have been using minor variants of this patch in-house successfully
for at least couple of years now, I checked that this version has the
intended effect on our gcc-8 based version of the toolchain and the patch
applies untouched on mainline.

Olivier

2018-10-10  Doug Rupp  <rupp@adacore.com>
            Olivier Hainque  <hainque@adacore.com>

	* config/rs6000/vxworks.h (VXWORKS_RELAX_LINK_SPEC): New macro.
	Pass --relax to the linker for RTPs.
	(LINK_SPEC): Append VXWORKS_RELAX_LINK_SPEC.