command line – C refactoring tools for producing clean “specialized” code

I have C source code that is generalized either by preprocessing directives or compile-time optimizations, for example the ones shown below. Is there any command-line tool that can help to take code like this:

int16_t foo(FOO_STATE* fooState) {
#if SUPPORTS_WOMBAT_OPTION
    int16_t bar = get_bar_from(fooState);
    return bar + 1;
#else
    int16_t baz = get_baz_from(fooState);
    return baz - 1;
#endif
}

or this:

bool supportsWombat(void) {
#if SUPPORTS_WOMBAT_OPTION
    return true;
#else
    return false;
#endif
}

int16_t foo(FOO_STATE* fooState) {
    if (supportsWombat()) {
        int16_t bar = get_bar_from(fooState);
        return bar + 1;
    } else {
        int16_t baz = get_baz_from(fooState);
        return baz - 1;
    }
}

and transform to the appropriate one of the following, if I know I am working with a system where the value of SUPPORTS_WOMBAT_OPTION is always known?

for SUPPORTS_WOMBAT_OPTION = 1:

int16_t foo(FOO_STATE* fooState) {
    int16_t bar = get_bar_from(fooState);
    return bar + 1;
}

for SUPPORTS_WOMBAT_OPTION = 0:

int16_t foo(FOO_STATE* fooState) {
    int16_t baz = get_baz_from(fooState);
    return baz - 1;
}