Problem migrating from Nios to Nios II

Hi,

In the code migration from Nios to NiosII the following problems have occurred:

1. In inclusion of .h header files in a main function that manages multi-thread code.

2. No recognition of old global variables of Nios code, in a .h header file. Is there any key point on multi-thread code and global variables? Why when I declare all my global variables In a header file (of course included all around) allways give me an error of redeclaration and previous declaration????

PS: The original code was perfectly running on a NiosI based board.

thank you