__declspec(dllexport) equivalent under linux / osx with g++ ?

majestik666@gmail.com · *nix forums beginner Joined: 03 Mar 2006 Posts: 4

Hi,

i'm bulding a multi platform app under windows/linux/osx
an i have a bit of trouble exporting c++ symbols from
a dynamic library...
Under windows, i compile a dll exporting symbols
using :
__declspec(dllexport) & __declspec(dllimport)

I do export non-static and static members from my c++ code
without any problems ...
But I can't find a way to do it uner linux or osx with g++
anybody can help on this one ?

Thanks a lot
Francois

Jack Klein · *nix forums Guru Joined: 19 Feb 2005 Posts: 776

On 2 Mar 2006 19:18:10 -0800, "majestik666@gmail.com"
<majestik666@gmail.com> wrote in comp.lang.c++:

Asfand Yar Qazi · *nix forums beginner Joined: 24 Mar 2005 Posts: 29

Jack Klein wrote:

JH Trauntvein · *nix forums beginner Joined: 28 Mar 2005 Posts: 12

majestik666@gmail.com wrote:

fxlchic · *nix forums beginner Joined: 10 Aug 2006 Posts: 1

you can consult dlltool manpage to find the solution:
man dlltool:

In order to mark a function as being exported from a DLL, it needs to have an -export:<name_of_function> entry in
the .drectve section of the object file. This can be done in C by using the asm() operator:

asm (".section .drectve");
asm (".ascii \"-export:my_func\"");

int my_func (void) { ... }

for example:
windows: __declspec(dllexport) void NCScnetSetTimeout(BOOLEAN bTimeout);

linux:
asm (".section .drectve");
asm (".ascii \"-export:NCScnetSetTimeout\"");
extern "C" void NCScnetSetTimeout(BOOLEAN bTimeout);

Google