Advanced C question

I have two questions, I would like to ask:

1) at the moment im refactoring my code and i have 6 functions, which share one function in common, exp.:

< pre>
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static void bar(INT32 x)
{ }

void foo1()
{ bar(1);
}

void foo2()
{ bar(2);
}

now my question, is there a trick, i could put foo1 and foo2 in seperate .c files and keep bar still "static" thus invisible to outside linking?