# define strong_alias(name, aliasname) _strong_alias(name, aliasname)
 # define _strong_alias(name, aliasname) \
-  extern __typeof (name) aliasname __attribute__ ((alias (#name)));
+  extern __typeof (name) aliasname __attribute__ ((alias (#name))) \
+    __attribute_copy__ (name);
 
 /* This comes between the return type and function name in
    a function definition to make that definition weak.  */

#else
#define TF_CAPI_EXPORT __declspec(dllimport)
#endif  // TF_COMPILE_LIBRARY
#else
#ifdef TF_CAPI_WEAK
#define TF_CAPI_EXPORT \
  __attribute__((visibility("default"))) __attribute((weak))
#else
#define TF_CAPI_EXPORT __attribute__((visibility("default")))
#endif  // TF_CAPI_WEAK
#endif  // _WIN32
#endif  // SWIG

// TF_Bool is the C API typedef for unsigned char, while TF_BOOL is

// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

extern int weaksym __attribute__((__weak__));
int weaksym = 42;

int foo1()
{
	return weaksym;

// Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

extern int weaksym __attribute__((__weak__));
int weaksym = 42;

int foo2()
{
	return weaksym;

file compiled by gcc, the file x.cgo2.c:

	void
	_cgo_be59f0f25121_Cfunc_puts(void *v)
	{
		struct {
			char* p0;
			int r;
			char __pad12[4];
		} __attribute__((__packed__, __gcc_struct__)) *a = v;
		a->r = puts((void*)a->p0);
	}

It extracts the arguments from the pointer to _Cfunc_puts's argument
frame, invokes the system C function (in this case, puts), stores the

+/* Describes a char array whose address can safely be passed as the first
+   argument to strncpy and strncat, as the char array is not necessarily
+   a NUL-terminated string.  */
+# define __attribute_nonstring__ __attribute__ ((__nonstring__))
+#else
+# define __attribute_nonstring__
+#endif
+
 #if defined __LONG_DOUBLE_MATH_OPTIONAL && defined __NO_LONG_DOUBLE_MATH
 # define __LDBL_COMPAT 1
 # ifdef __REDIRECT

				break
			}

			t = c.Type(ptr, pos)
			if t == nil {
				return nil
			}

			// For a struct/union/class, remember the C spelling,
			// in case it has __attribute__((unavailable)).
			// See issue 2888.
			if isStructUnionClass(t.Go) {
				t.Typedef = dt.Name
			}
		}
	}
	return t
}

// FuncType returns the Go type analogous to dtype.