Debugging shared libs on windows

[user1234]

On Wednesday, 6 December 2017 at 21:17:55 UTC, Tofu ninja wrote:
> On Wednesday, 6 December 2017 at 21:12:20 UTC, Tofu ninja wrote:
>> I am compiling with -m64 -shared -debug -g and a .pdb is 
>> generated but visual studio says the dll was not compiled with 
>> debug information, am I missing something or is this not 
>> supported?
>>
>> DMD32 D Compiler v2.076.0
>
> Actually never mind, -gf worked....

what is -gf ? it's not documented here 
https://dlang.org/dmd-windows.html#switches