[dub] Passing --DRT-gcopt to dmd

[Mathias Lang]

On Friday, 31 May 2019 at 15:41:24 UTC, Anonymouse wrote:
> On Friday, 31 May 2019 at 15:31:13 UTC, kinke wrote:
>> On Friday, 31 May 2019 at 10:27:44 UTC, Anonymouse wrote:
>>>> $ grep dflags dub.json
>>>>     "dflags": [ "-lowmem", "--DRT-gcopt=profile:1" ],
>>
>> This should work indeed. I guess it doesn't because dub 
>> probably uses a response file containing all cmdline options, 
>> whereas -lowmem definitely [and --DRT-* probably] need to be 
>> direct cmdline args.
>
> Is this something I can/should report? (Where do dub issues go?)

Replying here despite the delay because this is one of the top 
post when one google for gcopts.

This will be possible with the new version of the runtime 
(>=2.091.0, not released yet).

It has been filled as 
https://issues.dlang.org/show_bug.cgi?id=20459 and was fixed in 
https://github.com/dlang/druntime/pull/2881 which means dub 
compiled with druntime >= 2.091 will allow you to do:
`dub -- --DRT-gcopt=profile:1`

And any other D program will ignore `--DRT` options if provided 
after the `--` delimiter.