如下一段代码，用gcc和g++编译，gcc是ok的
g++提示 error: invalid type argument of unary ‘*’ (have ‘long int’)
error: expected primary-expression before ‘typeof’
g++增加编译选项-std=gnu++11  -std=c++11也不行
求问如何能编译通过呢？

#ifdef __cplusplus
extern "C" {
#endif

#include <stdio.h>
#include <stdlib.h>

#define pal_rcu_assign_pointer(p, v) \
    do { \
        if(v!=NULL){(p) = (typeof(*v) *)(v);}else{(p)=NULL;} \
    } while (0)

int main()
{
    int * a=NULL;
    printf("%p", a);
    pal_rcu_assign_pointer(a, NULL);
    printf("%p", a);
        return 0;

}

#ifdef __cplusplus
}
#endif
--
FROM 36.112.24.*