[m-dev.] type punning with recent versions of gcc

[Mark Brown]

Hi,

Is it worth trying to fix the Mercury libraries to avoid the type-punning
warnings with recent versions of gcc?  There are lots of these, and at least
some of them seem to cause either mmc or compiled programs to seg fault.

I think it would be better to just pass -fno-strict-aliasing to whatever
compilers support it.  Any problems with that?

Cheers,
Mark.

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