RFC: Pay-as-you-go, Portable D Runtime for Microcontrollers (and maybe more)

[Mike via Digitalmars-d]

On Wednesday, 6 May 2015 at 07:20:38 UTC, Johannes Pfau wrote:

>> 
>> What I would like to see, however, is a friendly compiler 
>> error like "This platform does not support thread-local 
>> storage.  Please decorate your global variables with 
>> __gshared." rather than "undefined reference '_d_get_address'" 
>> from the linker.
>> 
>> 
>> Mike
>
> That's easy:
> https://github.com/D-Programming-microD/GDC/commit/d5677e03f40f4eb548e520728c5071a0b4445d24
>
> (Well, the error message could be a little bit friendlier ;-)

You know, that fork of yours has some really interesting stuff in 
it :0

The -ftls-support option would be really great, but I'd call it 
-fno-tls :)

I think such an option would be most useful at configure-time.  
That is, if GDC is configured with --disable-tls or 
--disable-threads, then -fno-tls is ON by default.  That way it's 
more a definition of the target platform than user choice.

And now that I think of it, tying some of those compiler options 
to the configure options might be a better way to define platform 
support rather than reading .di files or enums from a special 
"configuration" module.

Mike