c – ‘memcpy’未在此范围内声明

我尝试包括memory.h(和string.h)和eclipse找到该功能,如果我点击“开放声明”,但gcc给我的错误.

我能怎么做？

#include <algorithm>
#include <memory.h>

namespace rosic
{
   //etc etc
template <class T>
  void circularShift(T *buffer,int length,int numPositions)
  {
    int na = abs(numPositions);
    while( na > length )
      na -=length;
    T *tmp = new T[na];
    if( numPositions < 0 )
    {

      memcpy(  tmp,buffer,na*sizeof(T));
      memmove( buffer,&buffer[na],(length-na)*sizeof(T));
      memcpy( &buffer[length-na],tmp,na*sizeof(T));
    }
    else if( numPositions > 0 )
    {
      memcpy(  tmp,&buffer[length-na],na*sizeof(T));
      memmove(&buffer[na],(length-na)*sizeof(T));
      memcpy(  buffer,na*sizeof(T));
    }
    delete[] tmp;
  }

//etc etc
}

我收到每个memcpy和memmove功能的错误.