MSC __STDC__ strange value

[ORCUTT at cc.utah.edu]

Turbo C has an option (-A?) that disables extended keywords
like near, far, huge, pascal, and interrupt.  When this option
is not used, __STDC__ is not defined.  When this option is
used, __STDC__ is defined as 1.  Could MSC have a similiar option
that, when used, defines __STDC__ as 1 and when not used,
defines __STDC__ as 0?