Compiler error message help

[EvilManagedCare]

Hi, I'm trying to complete a project for school involving the use of semaphores. I have included the proper header files (<semaphore.h> plus one for pthreads). I have pointed the compiler to the proper libraries as well. This is written in C. Yes, this is an assignment, but please be aware I am not looking for help with implementation, rather I can't seem to figure out this damnable compile error.

Here are lines 47 through 50 of my code, which are "simple" declarations of the semaphores and initializing them:

47 sem_t empty;
48sem_init(0, 0, 5);
49
50 sem_t full;
51 sem_init(&full, 0, 0);

Here are the messages I'm getting when I try and compile for line 48. I get the same set for line 50 but didn't post it for the sake of brevity:
|48|error: expected declaration specifiers or ?...? before ?&? token|
|48|error: expected declaration specifiers or ?...? before numeric constant|
|48|error: expected declaration specifiers or ?...? before numeric constant|
|48|warning: data definition has no type or storage class|
|48|warning: type defaults to ?int? in declaration of ?sem_init?|

I have declared all these outside the main() function. How can I resolve these errors? I'm baffled because it seems to indicate no data type for sem_t, but it is defined in semaphore.h, which I have included.

Thanks in advance for the help.

 

[degibson]

What compiler are you using?

Try compiling this:
1 #include <stdio.h>
2 #include <semaphore.h>
3
4 int main() {
5 sem_t foo;
6 sem_init(&foo,0,5);
7 return 0;
8 }

This compiles fine under gcc:
gcc foo.c -lpthread

 

[EvilManagedCare]

Yes, that compiles for me too. FWIW I tried declaring the bit in my OP within the main(), and that did no good either.

I am using Code::Blocks as an IDE, the compiler is GCC. I get the same messages if I compile from the command line as well.

Any other suggestions?

 

[Ken g6]

What is "Ø"? Is that supposed to be NULL?

 

[EvilManagedCare]

I'm such a n00b. In a fit of amnesia I had overlooked where I placed the sem_init() functions, which degibson had pointed out was the problem. Perhaps I should hold off on the ether until _after_ my homework is done.

Anyway, thanks degibson!