1const builtin = @import("std").builtin;
 2export fn entry() void {
 3    const foo = builtin.OptimizeMode.x86;
 4    _ = foo;
 5}
 6
 7// error
 8//
 9// :3:38: error: enum 'builtin.OptimizeMode' has no member named 'x86'
10// : note: enum declared here