-B bfdarch
   --binary-architecture=bfdarch
       Useful when transforming a architecture-less input file into an object file.  In this case the output architecture can be set to bfdarch.  This
       option will be ignored if the input file has a known bfdarch.  You can access this binary data inside a program by referencing the special
       symbols that are created by the conversion process.  These symbols are called _binary_objfile_start, _binary_objfile_end and
       _binary_objfile_size.  e.g. you can transform a picture file into an object file and then access it in your code using these symbols.

#include <stdio.h>
#include <string.h>

#define MAX_CHARS (32)

extern char _binary_my_data_txt_start;
extern char _binary_my_data_txt_end;
extern int _binary_my_data_txt_size;

int main(int argc, char **argv)
{
    char line[MAX_CHARS] = {0};
    char *my_data_start_addr = (char *) &_binary_my_data_txt_start;
    int str_len = (char) *my_data_start_addr - 0x30; /* 0x30 => '0' */

    if (str_len > MAX_CHARS) {
        str_len = MAX_CHARS;
    }

    strncpy(line, my_data_start_addr + 1, str_len);

    printf("_binary_my_data_txt_start: %c\n", _binary_my_data_txt_start);
    printf("_binary_my_data_txt_end: %c\n", _binary_my_data_txt_end);
    printf("_binary_my_data_txt_size: %d\n", _binary_my_data_txt_size);
    printf("Read string is %s\n", line);

    return 0;
}

5Hello

$ ./test_obj
_binary_my_data_txt_start: 5
_binary_my_data_txt_end:
Segmentation fault (core dumped)

_binary_my_data_txt_start: 5
_binary_my_data_txt_end:

Program received signal SIGSEGV, Segmentation fault.
main (argc=1, argv=0x7fffffffe1d8) at test_obj.c:24
24        printf("_binary_my_data_txt_size: %d\n", _binary_my_data_txt_size);
(gdb) p _binary_my_data_txt_size
Cannot access memory at address 0x7

8HelloABC

(gdb) p _binary_my_data_txt_size
Cannot access memory at address 0xa