win32 api & lib issue

[ryuukk_]

On Thursday, 2 November 2023 at 10:17:37 UTC, Peter Hu wrote:
> On Thursday, 2 November 2023 at 10:02:29 UTC, Imperatorn wrote:
>> On Thursday, 2 November 2023 at 09:58:21 UTC, Peter Hu wrote:
>>> On Thursday, 2 November 2023 at 09:13:11 UTC, Imperatorn 
>>> wrote:
>>>> On Thursday, 2 November 2023 at 09:08:02 UTC, Imperatorn 
>>>> wrote:
>>>>> On Thursday, 2 November 2023 at 08:31:41 UTC, Peter Hu 
>>>>> wrote:
>>>>>> Greetings!
>>>>>>
>>>>>> From time to time I encountered issues on the subjected 
>>>>>> after I upgraded my dmd package.Given below code :
>>>>>>
>>>>>> [...]
>>>>>
>>>>> If it still doesn't work try adding this:
>>>>>
>>>>> ```d
>>>>> pragma(lib, "user32");
>>>>> pragma(lib, "comdlg32");
>>>>> ```
>>>>
>>>> Another alternative if you're using dub is to add this in 
>>>> your dub.json instead:
>>>>
>>>> ```json
>>>> "libs": ["user32", "comdlg32"]
>>>> ```
>>>>
>>>> This seems be something related to DMD vs LDC. Because if I 
>>>> change the compiler to DMD I also get unresolved external 
>>>> symbols, but not with LDC.
>>>>
>>>> It seems the forwarding of directives from submodules are 
>>>> different.
>>> Thank you.
>>>
>>> Below two pragma solved the isse but am confused as they are 
>>> already in the system path.This is the first time I have to 
>>> include lib files here.How come other gui programs don't have 
>>> to do this.
>>> pragma(lib,"user32");
>>> pragma(lib,"comdlg32");
>>
>> I'm not sure why, it works for me, but I think it could be 
>> something dmd does different. The pragma lib is inserted into 
>> the generated object file, or otherwise passed to the linker, 
>> so the linker automatically links in that library.
>>
>> I'm guessing dmd for some reason does not see it in the 
>> submodule, but I have no proof that's the issue, I'm just 
>> guessing.
>
> Really appreciated for the help.I am learning to understand.
> Not using these two pragma in the source,other in the 
> commandline:dmd -m64 user32.lib comdlg32.lib test.d 
> compiled.But---
> In an IDE say PoseidonD it still failed to compile even if I 
> provided the library path to the compiler,I just can't 
> understand how come my other small programs ( based on gui 
> libslike DFL2,iup4D,dwt,NAppGui4D ) works fine without having 
> to provide pragma in the source before compiling.

It's probably because these libraries already have the symbols