Urgent: C Variable scope

Hi Everyone,

I have a multiple source file C program, that contains header files for global variables. When I create a header file using static declaration it compiles and links ok, however the scope is wrong because the variable changes value according to what it last was in the current C file not the new value changed in the last C file.

I tried to make the static declaration in the main procedure then create extern references in the other c source files however the linker is unable to resolve the extern references.

Does anyone have a suggestion on how to get a global variable to have scope over multiple c files.

In anticipation of the reply
:) Thanks a million :)