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From: Paul Rubin <no.email@nospam.invalid>
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Subject: Re: Why are Ada compilers difficult to write ?
Date: Thu, 21 Jun 2018 20:31:54 -0700
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"Dan'l Miller" <optikos@verizon.net> writes:
> microcontrollers and DSPs and NPs are all severely
> resource-constrained to the point of making any Ada or C++ or Java
> support impractical therein.

All of the above run fine on microcontrollers, though each has features
that you'd want to avoid using under severe enough constraints.

C itself is retro these days which is probably why there aren't
"serious" new compilers for it being written.
http://recc.robertelder.org/ is fairly recent but it's a hobby project
and it's c89.

But, I think lots of C users don't care much about C11.  I haven't
checked but it wouldn't surprise me if most or all of the commercial
embedded compilers donn't support it.