[klibc] [klibc:master] tests: Add test for malloc size arithmetic

[Ben Hutchings]

On Sat, 2021-05-01 at 17:06 +0000, Thorsten Glaser wrote:
> Ben Hutchings dixit:
> 
> > On Fri, 2021-04-30 at 23:29 +0000, Thorsten Glaser wrote:
> > > klibc-bot for Ben Hutchings dixit:
> > > 
> > > > +#if SIZE_MAX > 0x100000000
> > > 
> > > Are you sure about this? No ULL suffix or anything?
> > 
> > What are you worried about?
> 
> That this is equivalent to #if SIZE_MAX > 0 on 32-bit platforms,
> nullifying the effect.

Maybe in C90.  But we require (at least) C99 with some GNU extensions,
so preprocessor expressions use (at least) 64-bit integers.

Ben.

-- 
Ben Hutchings
Time is nature's way of making sure that
everything doesn't happen at once.
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