Better FreeBSD compatibility

[Sebastian Huber]

Hello,

in RTEMS we use the FreeBSD network stack and other components. I would 
like to make some Newlib headers (e.g. <sys/tyeps.h>, <sys/param.h> and 
<sys/time.h>) more compatible to FreeBSD so that we can use them 
directly. This involves changes like this:

Change internal type from x to y, e.g. _off_t to __off_t.

Change type define guard from x to y. e.g. __clockid_t_defined to 
_CLOCKID_T_DECLARED.

Example Newlib:

#ifndef __clockid_t_defined
typedef _CLOCKID_T_ clockid_t;
#define __clockid_t_defined
#endif

Example FreeBSD:

#ifndef _CLOCKID_T_DECLARED
typedef    __clockid_t    clockid_t;
#define    _CLOCKID_T_DECLARED
#endif

These internal types and guards are used in various FreeBSD headers, so 
with such a change I could avoid to modify them. Would be these changes 
to Newlib be acceptable in general?

-- 
Sebastian Huber, embedded brains GmbH

Address : Dornierstr. 4, D-82178 Puchheim, Germany
Phone   : +49 89 189 47 41-16
Fax     : +49 89 189 47 41-09
E-Mail  : sebastian.huber@embedded-brains.de
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