[Bug target/65581] [5 Regression] testsuite lto issue: multiple definition of `main', undefined reference to `WinMain'

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65581

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Can you try reducing to a minimal example?  it would seem that  int main() {
return 0; } should already fail this way?