* Proper RTEMS value for _POSIX_VERSION and _POSIX2_VERSION
@ 2021-06-01 19:35 Joel Sherrill
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From: Joel Sherrill @ 2021-06-01 19:35 UTC (permalink / raw)
To: Newlib
Hi
The RTEMS _POSIX_VERSION define is hard-coded to 199309L which reflects the
POSIX version the initial RTEMS support was implemented to. Since then,
RTEMS has picked up features from newer versions.
https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/unistd.h.html
RTEMS has never and is not fully conforming to the POSIX standard. Being a
single process, there will always be capabilities missing. I don't think
Cygwin is fully conforming either but has a series of conditional logic to
set _POSIX_VERSION based on the value of __POSIX_VISIBLE
https://sourceware.org/git/?p=newlib-cygwin.git;a=blob;f=newlib/libc/include/sys/features.h#l403
I am thinking RTEMS should use similar logic. Question: Does that sound
more correct than the current hard-coded value?
And since we don't have a POSIX shell, we still should not set
_POSIX2_VERSION. RIght?
Thanks for the advice..
--joel
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2021-06-01 19:35 Proper RTEMS value for _POSIX_VERSION and _POSIX2_VERSION Joel Sherrill
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