On 14.09.2013 18:46, Buk wrote:
Hi all,
I've read http://dlang.org/dll.html, and frankly there seems to be a lot
of boilerplate & rote process to build a DLL.
I realise that many of the do nothing functions /can/ be used to do a
lot more; and these may be required for some purposes. But, for a simple
DLL of functions, that can be built in C as simply as:
C:\test\demo>type mydll.c
int __declspec(dllexport) add( int a, int b ) {
return a + b;
}
C:\test\demo>cl /MT /LD mydll.c
mydll.c
/out:mydll.dll
/dll
/implib:mydll.lib
mydll.obj
Creating library mydll.lib and object mydll.exp
C:\test\demo>dumpbin /exports mydll.dll
Dump of file mydll.dll
File Type: DLL
Section contains the following exports for mydll.dll
1 ordinal base
1 number of functions
1 number of names
ordinal hint RVA name
1 0 00001000 add
Is there any similar mechanism for these 'simple' cases for D?
If not, shouldn't it be possible to create an ?interface? file that
takes care of the boilerplate? (If so, does anyone have one they can
share?)
Thanks, Buk.
Actually the code snippet for DllMain on that page is the needed
boilerplate code if you don't need any tweaking of the defaults. If you
add code in mydll.d like:
export extern(C) add(int a, int b) {
return a + b;
}
and build this with: dmd -ofmydll.dll -d mydll.d dllmain.d
you get a dll with the export:
>dumpbin /exports mydll.dll
Dump of file mydll.dll
File Type: DLL
Section contains the following exports for mydll.dll
00000000 characteristics
0 time date stamp Thu Jan 01 01:00:00 1970
0.00 version
1 ordinal base
1 number of functions
1 number of names
ordinal hint RVA name
1 0 00003010 _add
[The -d in the command line has nothing to do with building DLLs, but is
needed because the DllMain snippet causes a deprecation message.]
If you are looking for something as described in the "D code calling D
code in DLLs" section, I'd have to issue a warning: this does not really
work sensibly yet, but it is being worked on.
