Temporarily adding -vgc to a DUB build

[Igor]

On Sunday, 17 September 2017 at 01:50:08 UTC, Nicholas Wilson 
wrote:
> On Saturday, 16 September 2017 at 21:45:34 UTC, Nordlöw wrote:
>> How do I temporarily enable -vgc when building my app with DUB?
>>
>> I've tried
>>
>> DFLAGS=-vgc /usr/bin/dub build --build=unittest
>>
>> but it doesn't seem to have any effect as it doesn't rebuild 
>> directly after the call
>>
>> /usr/bin/dub build --build=unittest
>>
>> I'm using DUB version 1.5.0
>>
>> Or is adding a new build configuration, say unittest-vgc, the 
>> only way to accomplish this?
>
> Setting the dflags in the dub.json should work.
>
> This is what I use for dcompute:
>
> {
>     ...
>     "dflags" : ["-mdcompute-targets=cuda-210" ,"-oq", 
> "-betterC"],
>     ...
> }
>
> so just change those flags to "-vgc" should do the trick.

You can also just execute:

export DFLAGS=-vgc

before running dub. That should work since as far as I know 
"export" is needed to make env var visible to other processes 
started from the same shell session.