On 03/15/2013 09:13 PM, Zack Weinberg wrote:
On 2013-03-15 8:57 AM, Ralf Corsepius wrote:
aio.h and sys/mman.h are not available everywhere
aio.h certainly, but are you aware of a *specific Unix-like system*
which is in current use and does not provide <sys/mman.h>?
Unix-like! Not all OSes are Unix-like.
Most prominent one without mman.h is mingw. Others, I am aware about are
certain newlib based toolchains.
Newlib also is one of the places which has a history of struggling with
the _POSIX_*-defines (Also affects Cygwin).
That header
is mandatory in POSIX-2008 (although not before then) and the last time
I can remember encountering a workstation-scale Unix environment that
didn't have it was in the mid-nineties sometime. I'd believe there
might be embedded mostly-POSIX-compliant environments still that don't
do virtual memory, but I've never seen one.
Correct - RTEMS is one of these. We have a rudimentary implementation of
aio.h since 2010 and don't have mmap.h at all.
Ralf
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