llvm/clang/test/Preprocessor/non_fragile_feature1.m

// RUN: %clang_cc1 -triple i386-unknown-unknown -fobjc-runtime=gcc %s
#ifndef __has_feature
#error Should have __has_feature
#endif

#if __has_feature(objc_nonfragile_abi)
#error Non-fragile ABI not used for compilation but feature macro set.
#endif