.

1 files changed, 10 insertions, 4 deletions

diff --git a/config.hin b/config.hin
index ed4e14da6..1a7d9e741 100644
--- a/config.hin
+++ b/config.hin
@@ -23,10 +23,16 @@
 /* Define to 1 if using `getloadavg.c'. */
 #undef C_GETLOADAVG
 
-/* Define the default level of POSIX conformance for these tools. The value is
-   of the form YYYYMM, specifying the year and month the standard was adopted.
-   Unless explicitly selected at configure-time, this symbol is not defined.
-   */
+/* Define the default level of POSIX conformance. The value is of the form
+   YYYYMM, specifying the year and month the standard was adopted. If not
+   defined here, it defaults to the value of _POSIX2_VERSION in <unistd.h>.
+   Define to 199209 to default to POSIX 1003.2-1992, which makes standard
+   programs like `head', `tail', and `sort' accept obsolete options like `+10'
+   and `-10'. Define to 200112 to default to POSIX 1003.1-2001, which makes
+   these standard programs treat leading-`+' operands as file names and
+   require modern usages like `-n 10' instead of `-10'. Whether defined here
+   or not, the default can be overridden at run time via the _POSIX2_VERSION
+   environment variable. */
 #undef DEFAULT_POSIX2_VERSION
 
 /* Define to 1 for DGUX with <sys/dg_sys_info.h>. */