POSIX_C_SOURCE

[M. Warner Losh]

In message: <20030830171343.GA33800 at falcon.midgard.homeip.net>
            Erik Trulsson <ertr1013 at student.uu.se> writes:
:  /* Deal with IEEE Std. 1003.1-1990, in which _POSIX_C_SOURCE == 1. */
:  #if _POSIX_C_SOURCE == 1
:  #undef _POSIX_C_SOURCE		/* Probably illegal, but beyond caring now. */
: @@ -280,6 +282,8 @@
:  #undef _POSIX_C_SOURCE
:  #define	_POSIX_C_SOURCE		199209
:  #endif

That's 100% legal and should *NOT* produce a warning.  Garrett is
right.

Warner