Stephen,

>	I have been trying to compile Elm 2.4, and have found a problem that 
>is currently preventing me from linking.

I encountered the same problem when trying to compile elm2.4pl24, but the
fix was simple.

>	Specifically, the symbols _siglongjmp and _sigsetjmp are not defined.

The hdrs/defs.h file needs to be modified as follows:

683c683
< #if defined(POSIX_SIGNALS) && !defined(__386BSD__) && !defined (__NetBSD__)
---
> #if defined(POSIX_SIGNALS) && !defined(__386BSD__)

And all should be well. Hope that helps.

--
  Michael K. Sanders
  msanders@wpi.edu