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digitalmars.D.learn - Re: Export values (enum, int, char[]...) for DLL

reply Nrgyzer <nrgyzer gmail.com> writes:
Nrgyzer Wrote:

 torhu Wrote:
 
 On 06.05.2010 16:06, Nrgyzer wrote:
 Thanks, but doesn't work :(

 My files contain:

 mydll.d:

 module mydll;
 export extern int i;

 mydll2.d:

 module mydll;
 export int i = 7;

 test.d:

 import mydll;
 import std.stdio;

 void main() {
 	writefln(i);
 }

 I can compile the dll, but when I compile test.d, I get the following error:
"Error 42: Symbol Undefined _D5mydll1ii"

It seems that export doesn't work for data, only functions. If you build with -map, you'll see that i is not exported. I got it working by using this .def file: LIBRARY "mydll.dll" EXETYPE NT EXPORTS D5mydll1ii Then create the import lib with: implib /s mydll.lib mydll.dll /s adds the underscores. If you use extern (C) the symbols will be a lot simpler to read and write, though. Look at the .map file to see what the actual symbols are.

Thanks - works :)

Hello, dmd now exports all values successfully. But when I try to export a class, I get the following errors: "Error 42: Symbol Undefined _D5mydll1t7__ClassZ Error 42: Symbol Undefined _D5mydll1t5_ctorMFZC11mydll1t" Source of mydll.d is: export class t { export this(); } Source of mydll2.d is: import std.stdio: writefln; export class t { export this() { writefln("hello world!"); } } Source of test.d: pragma(lib, "mydll.lib"); import mydll; void main() { t myTest = new t(); } When I export D5mydll1t7__ClassZ in my def-File, I can compile it but when I try to create a new instance of t, I get an access violation :(.
May 13 2010
parent torhu <no spam.invalid> writes:
On 13.05.2010 18:23, Nrgyzer wrote:
 Nrgyzer Wrote:
 dmd now exports all values successfully. But when I try to export a class, I
get the following errors:

 "Error 42: Symbol Undefined _D5mydll1t7__ClassZ
 Error 42: Symbol Undefined _D5mydll1t5_ctorMFZC11mydll1t"

 Source of mydll.d is:

 export class t {
 	
 	export this();
 	
 }

 Source of mydll2.d is:

 import std.stdio: writefln;

 export class t {

 	export this() {
 		writefln("hello world!");
 	}
 }

 Source of test.d:

 pragma(lib, "mydll.lib");
 import mydll;

 void main() {
 	
 	t myTest = new t();
 	
 }

 When I export D5mydll1t7__ClassZ in my def-File, I can compile it but when I
try to create a new instance of t, I get an access violation :(.

Never tried exporting a class, but there's some info on this page: http://prowiki.org/wiki4d/wiki.cgi?BestPractices/DLL
May 13 2010