My fix to CA on alphas

[Geoff Savage <savage@fnal.gov>]

I still can't build epics by moving to the base directory and typing gnumake
install.alpha.  It halts at a couple of points.
1. aitGen does not get its execute bit set.
2. /usr/shlib/libc.so has unresolved symbols when aitGen executes.  (I
changed the execute bits on aitGen by hand.)
Possible Solutions(?):
1. Add a chmod command to the makefile?
2. Change the order of the libraries on the command line?  (I'll check this
later.)

Here's what I did to get CA working.  The config files need one change.  The
nsl library is contained in the c library.

In CONFIG.Host.alpha:
#ARCH_DEP_LDLIBS = -lnsl
ARCH_DEP_LDLIBS = -lc

I moved to the libCom directory and built libCom.a.  Then I went to the ca
directory and made one minor change.

<d0ola> diff access.c access.c.orig
1915c1915
< *(dbr_long_t *)pdest = htonl (*(dbr_long_t *)pvalue);
---
> *(long *)pdest = htonl (*(dbr_long_t *)pvalue);
<d0ola>

I'm uncertain as to the reason behind not using the dbr_xxxx_t typedefs
here.

Then I built libca.c.  I linked in the new libraries and my program executed
with no unaligned access errors.

I now need to build the IOC software on our alpha after I finish my CA
application.  I have wrapped some basic CA functions for use in Python.

Geoff Savage