1const std = @import("std");
 2const expect = std.testing.expect;
 3
 4extern fn common_defined_externally() c_int;
 5extern fn incr_i() void;
 6extern fn add_to_i_and_j(x: c_int) c_int;
 7
 8test "undef shadows common symbol: issue #9937" {
 9    try expect(common_defined_externally() == 0);
10}
11
12test "import C common symbols" {
13    incr_i();
14    const res = add_to_i_and_j(2);
15    try expect(res == 5);
16}