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Re: Another GLIBC build error with GCC6

On 08/18/2015 11:18 AM, Marek Polacek wrote:
On Tue, Aug 18, 2015 at 10:13:00AM -0700, Steve Ellcey wrote:
On Tue, 2015-08-18 at 10:04 -0700, Paul Eggert wrote:
Steve Ellcey wrote:
I put the old and new
code segments in a small test program and compiled it on MIPS (32 and 64
bit modes) and verified that the generated code was identical for both
versions in that setting.

That's good enough for me.  I installed the patch.

Wasn't there a similar problem with DT_EXTRATAGIDX?  See, for example:

For some reason, I am no longer seeing this problem.  I don't see any
changes in GLIBC or GCC that look like they would have made this problem
go away so I am not sure what is going on.

If this is about shift overflow warnings:
I've changed the -Wshift-overflow warning to not warn when left-shifting 1
into the sign bit.  It caused way too much noise.  If you still want to see
even those, use -Wshift-overflow=2.
And note that left shifting 1 into the sign bit may be downgraded from undefined to implementation defined behaviour for C (it's already changed for C++14).


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