_M_local_data was not declared in this scope

I am trying memory map a map with key and value data type as string following this blog. But i'm getting lots of error including above error. How can i fix it? Is their other method to memory map a file with map values of key and value type string accurately? Here's the code which i tried.

 #include<iostream>
#include<map>
#include<string>

*mmap_start = (void*)139731133333504;
size_t offset = 1024;

template <typename T>
class MmapAlloc {

  pointer allocate(size_t num, const void *hint = 0) {
    long returnvalue = (long)mmap_start + offset;
    size_t increment = num * sizeof(T) + 8;
    increment -= increment % 8;
    offset += increment;
    return (pointer)returnvalue;
  }

};

typedef std::basic_string<char, std::char_traits<char>, MmapAlloc<char>> mmapstring;
typedef std::map<mmapstring, mmapstring, std::less<mmapstring>,MmapAlloc<mmapstring> > mmapmap;

int main(int argc, char **argv) {
    int fd = open("backingstore.dat", O_RDWR);
    void *mapping;
    mapping = mmap(mmap_start, 10*1024*1024,
      PROT_READ | PROT_WRITE, MAP_SHARED | MAP_FIXED, fd, 0);

    if(mapping == MAP_FAILED) {
        printf("MMap failed.\n");
        return 1;
    }

    mmapstring key("key");
    mmapstring value("value");

    if(fd < 1) {
        printf("Open failed.\n");
        return 1;
    }

    auto map = new(mapping)mmapmap();
    (*map)[key] = value;
    printf("Sizeof map: %ld.\n", (long)map->size());
    printf("Value of 'key': %s\n", (*map)[key].c_str());
    return 0;
}