libs-base/config/config.non-fragile-ivars.m

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/* A program for testing if the compiler is using non-fragile-ivars.
* Fails to build or returns 1 if the feature is not availale.
*/
#include "objc-common.g"
int
main()
{
#ifndef __has_feature
#define __has_feature(x) 0
#endif
return __has_feature(objc_nonfragile_abi) ? 0 : 1;
}