Gdc & avr

Manu turkeyman at
Fri Feb 3 11:32:21 PST 2012

On 3 February 2012 16:45, Paulo Pinto <pjmlp at> wrote:

>   The only language without runtime is pure assembly.

And C.. there's no requirement to link the CRT in a C app. In fact, in many
of my projects, I don't.
I frequently find that the ONLY function I use from the CRT is sprintf...
which I really should write(/copy) my own version of, so I can never link a
CRT again :P

All high level languages require a runtime library, even C, despite what
> many people think.

Wrong, the C *language* depends on NOTHING in the CRT. I prefer to avoid
linking it wherever possible. Strangely enough, I find the 'standard' C
library to be one of the least standard libraries out there, and avoid it
for that reason.

Now in this case what would be nice would be the possibility to generate
> code that runs on top of the arduino without any
> real OS. This is a common use case in embedded systems and here the
> runtime has even an higher value as it takes the
> role of an OS.

All that's required is a toolchain that's capable of producing an exe
without the requirement to link any compulsory library.

> Paulo
>  "Manu" <turkeyman at> wrote in message
> news:mailman.312.1328277504.25230.digitalmars-d at
>  On 3 February 2012 15:37, Alex_Dovhal <alex_dovhal at> wrote:
>> **
>> >Andrea Fontana" <advmail at> wrote:
>>  >In this case can we hope for a d frontend?
>> That depends if it's MCU or MPU. If it will be MCU(like ARM7TDMI), which
>> means Harvard Architecture (where Program code and RAM are physically
>> different). Also internal RAM of a few KB and no Linux.
>> If it'll be MCU then it can have Linux OS, so theoretically it can have
>> GDC ported.
> Eh? Why would GDC depend on linux at all? If you disable the GC (and
> dependent language functionality), and manage to do something about the
> horrible exe bloat, there's no reason it shouldn't be able to target
> anything...
> The obvious advantage over C is the syntax features. Clearly D as a
> *language* shouldn't DEPEND on the druntime, other than some language
> features that imply GC, like dynamic arrays/etc.
> Is the toolchain not capable of producing a working exe without linking
> any library? Surely you can write a totally raw app with no libs at all?
> (assuming you avoid language features that make implicit druntime calls)
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