const std = @import("std"); const testing = std.testing; pub extern "c" fn printf(format: [*:0]const u8, ...) c_int; test "variadic function" { try testing.expect(printf("Hello, world!\n") == 14); try testing.expect(@typeInfo(@TypeOf(printf)).Fn.is_var_args); } // test // link_libc // verbose_cimport