foo.zig

const std = @import("std");

export fn init_fn() void {
    _ = std.c.printf(c"Hello!\n");
}
export fn another_init_fn() void {
    _ = std.c.printf(c"Hello again!\n");
}
export fn fini_fn() void {
    _ = std.c.printf(c"Bye!\n");
}

const Fn = extern fn () void;
export const init_array linksection(".init_array") = [_]Fn{
    init_fn,
    another_init_fn,
};
export const fini_array linksection(".fini_array") = [_]Fn{
    fini_fn,
};

pub fn main() void {
    std.debug.warn("hallo from main!\n");
}