On 11/12/2013 08:13 PM, Joel Sherrill wrote:


_GNU_SOURCE is transformed into multiple other
defines in features.h in glibc.

#ifdef  _GNU_SOURCE
# define __USE_GNU      1
#endif

Our sys/features.h does not have the comparable
ifdef. We are likely missing others as it turns
on about ten other feature flags in the glibc
features.h.

I guess we need to follow this pattern and add
_GNU_SOURCE to our sys/features.h. The others
need another round of thought.

Another option would be to add this to the Newlib <sys/cdefs.h> since here we already have defines related to _POSIX_SOURCE etc. Here we should use __GNU_VISIBLE to be in line with the BSD names.

--
Sebastian Huber, embedded brains GmbH

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