1) The following bug report from 1998 still hasn't been addressed in the
Redhat dist.
Missing definition (SIGCLD) in Sparc vs Intel

David HM Spector (spector)
Thu, 08 Oct 1998 12:39:20 -0400
Does anyone know if the following MISSING #define has been added to
signum.h
in 5.2..?  Compiling pvm (and a few other packages) revealed that this
equivilence was in the Intel includes and not in the Sparc ones.  If not,
it
would be a good thing to add...

#define SIGCLD          SIGCHLD

_DHMS

2)  there is an include that needs its wrapper:
/usr/include/signal.h:341
< # include <bits/sigthread.h>
   TO ================>
> # include <pthread.h>