test/Modules/system_headers.m

// Test that system-headerness works for building modules.

// RUN: rm -rf %t
// RUN: %clang_cc1 -fmodules -fmodules-cache-path=%t/cache -isystem %S/Inputs -pedantic -Werror %s -verify
// expected-no-diagnostics

@import warning;
int i = bigger_than_int;