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digitalmars.D.learn - Extern C and Symbol Mangling

reply Oleksii <al.skidan gmail.com> writes:
Hi,

I'm trying to link against a DLL which exports a bunch of C 
functions. The issue is: C symbols do not have underscore prefix 
in Windows, but DMD sticks underscore in front of the symbol 
name. For example: `extern(C) void Foo()` becomes `_Foo`.

Is there a way to disable that underscore?

Thanks in advance,
--
Oleksii
May 26 2017
next sibling parent reply Stanislav Blinov <stanislav.blinov gmail.com> writes:
On Friday, 26 May 2017 at 12:49:27 UTC, Oleksii wrote:

 Hi,

 I'm trying to link against a DLL which exports a bunch of C 
 functions. The issue is: C symbols do not have underscore 
 prefix in Windows, but DMD sticks underscore in front of the 
 symbol name. For example: `extern(C) void Foo()` becomes `_Foo`.

 Is there a way to disable that underscore?



Use extern(Windows), or the more general extern(System), which 
will expand to either extern(C) or extern(Windows), depending on 
the OS you target.
May 26 2017
parent Oleksii <al.skidan gmail.com> writes:
On Friday, 26 May 2017 at 12:51:20 UTC, Stanislav Blinov wrote:

 On Friday, 26 May 2017 at 12:49:27 UTC, Oleksii wrote:

 Hi,

 I'm trying to link against a DLL which exports a bunch of C 
 functions. The issue is: C symbols do not have underscore 
 prefix in Windows, but DMD sticks underscore in front of the 
 symbol name. For example: `extern(C) void Foo()` becomes 
 `_Foo`.

 Is there a way to disable that underscore?



 Use extern(Windows), or the more general extern(System), which 
 will expand to either extern(C) or extern(Windows), depending 
 on the OS you target.


Great thanks, it helped in deed. I still wonder why, since I 
expected `extern(Windows)` to be equal to `__stdcall`, which 
should have produced a mangled name `?Foo 0` instead of `Foo`, 
and I can clearly see in the Dependency Walker, that there's no 
such symbol in the DLL.
May 26 2017
prev sibling parent MGW <mgw yandex.ru> writes:
On Friday, 26 May 2017 at 12:49:27 UTC, Oleksii wrote:

 Hi,


Call methods and property C++ from D. Interface C++ and D and  
their  interaction.

https://pp.userapi.com/c636630/v636630885/4657a/07wCn5hbHHo.jpg
https://www.youtube.com/watch?v=HTgJaRRfLPk
May 26 2017