Requesting POSIX/SUS features from glibc
From: Paulo M C Aragão (yagpaulo-listas_at_yahoo.com)
Date: 10/31/05
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Date: Mon, 31 Oct 2005 11:32:19 -0200 To: debian-user@lists.debian.org
Hi,
Feature test macro _POSIX_SOURCE refers to which edition of POSIX.1 ?
And _XOPEN_SOURCE refers to which SUS version ?
I've got installed libc6 and glibc-doc both 2.3.5-7. I've carefully read the
documentation from these packages, but couldn't find clear, unambiguous
answers. It was clear that:
_POSIX_C_SOURCE >=1 POSIX.1 1990
_POSIX_C_SOURCE >=2 POSIX.2 1992
_POSIX_C_SOURCE >= 199309L POSIX.1 1993
_POSIX_C_SOURCE >= 199506L POSIX.1 1996
_XOPEN_SOURCE 500 SUS2
but _POSIX_SOURCE vaguely referred to the POSIX.1 standard, no edition
mentioned, and _XOPEN_SOURCE to "functionality described in the X/Open
Portability Guide".
Thanks
Paulo
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