Currently I find out, that newer versions of
POSIX are occasionally incompatible with older versions.
What I understand is that I can define the
_POSIX2_VERSION environment variable to a value of the form
yyyymm specifying the year and month the standard was adopted.
Three values are currently supported for
_POSIX2_VERSION: 199209 stands for
POSIX 1003.2-1992, 200112 stands for
POSIX 1003.1-2001, and
200809 stands for
I’m trying to find out the currently used
Do anyone know how to find out the version of POSIX2?