5 POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/shmat.html}
9 Portability problems fixed by Gnulib:
13 Portability problems not fixed by Gnulib:
16 This function is missing on some platforms:
17 mingw, MSVC 14, Android 7.1.
19 On Linux, the flag @code{SHM_REMAP} is needed in order to force @code{shmat}
20 to replace existing memory mappings in the specify address range. On other
21 platforms, it is not needed.