util_local_visibility.h

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#ifndef SECP256K1_LOCAL_VISIBILITY_H
#define SECP256K1_LOCAL_VISIBILITY_H
 
/* Global variable visibility */
/* See: https://github.com/bitcoin-core/secp256k1/issues/1181 */
#if !defined(_WIN32) && defined(__GNUC__) && (__GNUC__ >= 4)
# define SECP256K1_LOCAL_VAR extern __attribute__ ((visibility ("hidden")))
#else
# define SECP256K1_LOCAL_VAR extern
#endif
 
#endif /* SECP256K1_LOCAL_VISIBILITY_H */