Advanced C 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?

Yes, there is. Put the definition of bar() into a header file and include it in both .c files (that contain foo1() and foo2()). The code for bar() will likely be generated twice, but that's a different matter.

bar.h:

#ifndef BAR_H
#define BAR_H

typedef long INT32;
typedef void (*fp_t)(INT32);

extern fp_t bar;

#endif

bar.c:

#include "bar.h"

extern void foo1(void), foo2(void);

static void bar_(INT32);
fp_t bar = bar_;

int main(void)
{
    foo1();
    foo2();

    return 0;
}

static void bar_(INT32 i)
{
    (void)i;
}

foo1.c:

#include "bar.h"




void foo1(void)
{
    bar(1);
}

foo2.c:

#include "bar.h"

void foo2(void)
{
    bar(2);
}

Expose the static function through a function pointer? Nice.

Well, exposing the static function through a function pointer is quite similar to what C++ does when you call a virtual method.

But this is a situation where a question will lead to bad answers, since the original question is a request to use a specific keyword and then also wanting code that should ignore that keyword. It's a bit like "how can I create a const variable that I can also modify".

So should all questions get an answer, even when the answer will have to be questionable?

I have got the best solution. Discussion done.