#[repr(C)] struct ReallyBig { _a: [u8; usize::MAX], } // The limit for "too big for the current architecture" is dependent on the target pointer size // but is artificially limited due to LLVM's internal architecture // logic based on rustc_target::abi::TargetDataLayout::obj_size_bound() const fn max_size() -> usize { if usize::BITS < 61 { 1 << (usize::BITS - 1) } else { 1 << 61 } } extern "C" { static FOO: [u8; 1]; static BAR: [u8; max_size() - 1]; static BAZ: [u8; max_size()]; //~ ERROR extern static is too large static UWU: [usize; usize::MAX]; //~ ERROR extern static is too large static A: ReallyBig; //~ ERROR extern static is too large } fn main() {}