Got alloca() for Unix 386?

[Tom Neff]

In article <1990Jul12.235022.9489 at virtech.uucp> cpcahil at virtech.UUCP (Conor P. Cahill) writes:
>There is usually an alloca() in libPW.a, so try a -lPW.

Does anyone know whether SVR4 (for the 386) still has libPW.a?