Re: externs and thread local storage

[Mike Stump]

On Jul 1, 2006, at 11:23 AM, Gary Funck wrote:
To further complicate matters, if the program is rewritten into a  
single
file as follows:
int __thread x;

int main() {
  extern int x;
  x = 5;
}

it will fail at compile-time with gcc 4.1:

This sounds like a bug that should be fixed.  You should only need  
__thread on the extern if there was not a previous declaration for it.

What are the technical reasons for the front-end enforcing this  
restriction,

None in the above case, just laziness probably.