command line option or other method for determining the front end version of gdc

[dan via D.gnu]

On Sunday, 24 July 2016 at 17:16:59 UTC, Iain Buclaw wrote:
> On 24 July 2016 at 19:00, dan via D.gnu <d.gnu at puremagic.com> 
> wrote:
.....
>> However, i don't know what front end is compiled into gdc, so 
>> i'm unclear on which front-end to try get an earlier version 
>> of.
.....
>
> Later versions will write this out during compilation of a file 
> under -v.
>
>   $ gdc -v test.d
>   # ...
>   version   v2.068.2
>   # ...
>
> For earlier versions, there is a universal way to do it in code.
>
> pragma(msg, __VERSION__);

Thanks Iain, this works and gives me the right information.

For reference, including that pragma causes the version (such as 
2066L or 2067L) to be emitted during compilation.

(And when i run it, i can see that 2067 is the offending version 
so at least i know what to try to roll back to.)

dan