[patchset] introduce an -O3 autobuild target - and fix a lot of errors

[Michael Adam]

After feed-back by Volker, will provide an updated
patchset soon which will only use EINTR checks in
sys_read/write_v functions and hand-written loops,
i.e. not also check for EAGAIN or EWOULDBLOCK,
in order to avoid the danger of endless loops.

Cheers - Michael

On 2016-04-11 at 10:35 +0200, Michael Adam wrote:
> Hi,
> 
> Attached find a patchset that implements an autobuild target
> 'samba-o3', that builds with -O3 and runs some tests against
> the result (make quicktest...).
> 
> In order to enable this target by default, I had to fix quite
> a lot of -O3 errors, so that the build would pass on our
> autobuild server. Now it passes on ubuntu 14.04 and fedora 23
> at least.
> 
> Andrew: I have kept at a separate build target because I
> also wanted to make sure to run at least a subset of the
> testsuite against it. Hence I did not add it to the static
> target.
> 
> Review / comments welcome!
> 
> Cheers - Michael

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