Re: -D_REENTRANT and debian policy

[Gabor Gombas <gombasg@sztaki.hu>]

> I'd love it if someone could investigate just what this means with a
> modern glibc (i.e., not LinuxThreads) and whether it's still actually
> necessary.  At the least, there should really be a footnote in Policy
> explaining why this is needed or pointing to some document about it.

According to a quick grep, with glibc-2.5 from experimental the _only_
use is in <unistd.h> where getlogin_r() is not defined if _REENTRANT is
not defined and at the same time _POSIX_C_SOURCE is smaller than
199506L. Otherwise _REENTRANT is not used at all.

Anything that uses getlogin_r() without defining _POSIX_C_SOURCE is not
POSIX-conformant and probably does not worth worrying about, so I'd say
_REENTRANT is completely useless nowadays.

Gabor

-- 
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     MTA SZTAKI Computer and Automation Research Institute
                Hungarian Academy of Sciences
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