main.cpp

// clang++ -std=c++11 -stdlib=libc++ main.cpp

/* clang --version
 * clang version 3.8.0-2ubuntu3~trusty4 (tags/RELEASE_380/final)
 */

/* lsb_release -a
 * No LSB modules are available.
 * Distributor ID:	Ubuntu
 * Description:		Ubuntu 14.04.5 LTS
 * Release:			14.04
 * Codename:		trusty
 */

#include <cstddef>

#define elist_entry(ptr, type, member) ((type*)(((char*)ptr)-offsetof(type, member)))

typedef struct elist_struct {
	struct elist_struct *next, *prev;
} t_elist;

typedef struct {
	t_elist refs_link;
} t_rcm_regref;

int main()
{
	char a[] = "Hello World";
	char* b = a;
	t_rcm_regref* c = elist_entry(b, t_rcm_regref, refs_link);
}

main.cpp:31:35: error: unexpected type name 't_rcm_regref': expected expression
main.cpp:31:49: error: use of undeclared identifier 'refs_link'