Unable to compile `c` file with system headers without including `tinycc`'s `win32` headers on windows

[CrazyboyQCD]

What version of Bun is running?

1.3.3+274e01c73

What platform is your computer?

Microsoft Windows NT 10.0.22000.0 x64

What steps can reproduce the bug?

rand.c:

#include <stdlib.h>

int crand() { return rand(); }

test.js:

import { cc } from "bun:ffi";

const cExports = cc({
  source: "./rand.c",
  symbols: {
    crand: {
      returns: "int",
      args: [],
    },
  },
})

Command:

bun run test.js

What is the expected behavior?

Compile successfully.

What do you see instead?

Output:

./rand.c:1: error: include file 'stdlib.h' not found

Additional information

Related with #14014.

[ObscuritySRL]

I'm still experiencing this on Bun 1.2.23:

OS Name:                       Microsoft Windows 11 Home
OS Version:                    10.0.26100 N/A Build 26100

[CrazyboyQCD]

@robobun
It still exists on main, try to analyze and fix it.