cc -O2 -pipe  -pthread  -Wall -Wextra -Werror=implicit-function-declaration sys_mman/posix_typed_mem_open.c -o sys_mman/posix_typed_mem_open -D_GNU_SOURCE -D_BSD_SOURCE -D_ALL_SOURCE -D_DEFAULT_SOURCE  -lm -lpthread 
sys_mman/posix_typed_mem_open.c:18:2: error: call to undeclared function 'posix_typed_mem_open'; ISO C99 and later do not support implicit function declarations [-Werror,-Wimplicit-function-declaration]
        posix_typed_mem_open("", 0, 0);
        ^
1 error generated.