View Compilation Error

0_0_37865156_6977.cpp: In function 'll FastIO::read_fast()':
0_0_37865156_6977.cpp:133:57: error: 'PROT_READ' was not declared in this scope
   if(!pc) pc = (char*)mmap(NULL, fseek(0, 0, SEEK_END), PROT_READ, MAP_PRIVATE, 0, 0);
                                                         ^
0_0_37865156_6977.cpp:133:68: error: 'MAP_PRIVATE' was not declared in this scope
   if(!pc) pc = (char*)mmap(NULL, fseek(0, 0, SEEK_END), PROT_READ, MAP_PRIVATE, 0, 0);
                                                                    ^
0_0_37865156_6977.cpp:133:85: error: 'mmap' was not declared in this scope
   if(!pc) pc = (char*)mmap(NULL, fseek(0, 0, SEEK_END), PROT_READ, MAP_PRIVATE, 0, 0);
                                                                                     ^