mips-sgi-irix*)
if test "$GCC" != "yes"; then
xopen="yes"
- CPPFLAGS="$CPPFLAGS -D_XOPEN_SOURCE=500"
+
+ # "Applications should ensure that the feature test macro _XOPEN_SOURCE
+ # is defined with the value 500 before inclusion of any header. This is
+ # needed to enable the functionality described in this specification,
+ # and possibly to enable functionality defined elsewhere in the Common
+ # Applications Environment."
+
+ # So far, we've only detected this to be strictly necessary if not using
+ # gcc on SGI IRIX. And this only to avoid warnings.
+
+ AC_DEFINE(_XOPEN_SOURCE, 500, [ensure SUSV2 compatibility])
fi
;;
*)