Can't compile extern C with declspec

Asked Oct 30 '17 at 11:10

Active Oct 30 '17 at 11:15

Viewed 192 times

Hello I don't know why I can't compile this code ?

#include <iostream>
#include <stdio.h>
using namespace std;

int main()
{
   cout << "Hello world!" << endl;
   extern "C"
   {
      __declspec(dllexport) unsigned long NvOptimusEnablement = 0x00000001;
   }
   return 0;
}

I get this error :

C:\Users\Axel\Desktop\TestPerso\main.cpp|9|error: expected unqualified-id >before string constant|

I'm running on a PC with an Intel Hd chipset and Nvidia graphical card 920M with Windows 10 ont it.

edited Oct 30 '17 at 11:15

asked Oct 30 '17 at 11:10

Myranova

I edited the code – Myranova Oct 30 '17 at 11:17
2

You cannot export local variables, they don't have a stable address and highly unpredictable lifetime. Consider to keep the declaration outside of the function body so it becomes a global variable. – Hans Passant Oct 30 '17 at 11:18
Thanks compiling now – Myranova Oct 30 '17 at 11:20

Can't compile extern C with declspec

0 Answers0