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Wouldn't it be better to define _POSIX_SHARED_MEMORY_OBJECTS with valueIf that's what people are expecting to test for then yes.
-1 than to have it not defined? That way it is known at compile time
that there is no support, rather than needing to wait for runtime for a
sysconf() call.
And FWIW RTEMS supports sysconf() but doesn't have a lot of cases in its implementation. What sysconf value covers this one?
Craig
-----Original Message----- From: newlib-owner@sourceware.org [mailto:newlib-owner@sourceware.org] On Behalf Of Ralf Corsepius Sent: Thursday, November 20, 2008 12:08 AM To: Newlib List Subject: [rtems] Tweaks to sys/features.h
Hi again,
another RTEMS specific newlib patch, we'd like to see merged into newlib.
This patch address 2 issue with sys/features.h: * POSIX/SUSv3 mandates _POSIX_MONOTONIC_CLOCK to be set to -1, 0 or 200112L. RTEMS supports _POSIX_MONOTONIC_CLOCK but doesn't support sysconf(), so it must be set 200112L.
* RTEMS doesn't support _POSIX_SHARED_MEMORY_OBJECTS. The setting having been used so far was wrong.
Ralf
-- Joel Sherrill, Ph.D. Director of Research & Development joel.sherrill@OARcorp.com On-Line Applications Research Ask me about RTEMS: a free RTOS Huntsville AL 35805 Support Available (256) 722-9985
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