Gnulib module: —
Portability problems fixed by Gnulib:
Portability problems not fixed by Gnulib:
shmatinto a previously malloc-ed region fail on SunOS 4, with
EINVAL, even if there is an
munmapcall in between.
SHM_REMAPis needed in order to force
shmatto replace existing memory mappings in the specify address range. On other platforms, it is not needed.