Re: Building for more than one host architecture

[Mark Rivers <RIVERS@cars3.uchicago.edu>]

> Is anyone out there building EPICS on more than one host arch at the same
> time?  Our development machine configuration is:
> 
> 	Alpha/DEC Unix - Client applications
> 	Sun/SunOS - Client applications & IOC core/applications
> 
> I want to have only one master copy of the EPICS development tree on an
> NFS server to be mounted by various development machines.  Matt Needes
> and Mike Bordua (et al) did a nice job of laying things out so that
> object modules/executables/etc are kept seperate for different archs, so
> I don't see a problem there.  But in ...config/CONFIG_SITE you must specify
> only one host architecture for HOST_ARCH.  Swapping back and forth between
> machine specific CONFIG_SITE's is not an option.
> 
> If there is no better solution, I can mount the base and extensions subdirs
> off of the server seperately and have arch specific config subdirs to be
> mounted as "config" on each development machine.  It just seems like there
> should be a more intelligent solution.  Is there?

I have one EPICS tree and use it to build Sun4, Solaris and SGI.  I have gotten
around the problem you described (only 1 CONFIG_SITE file) in two different 
ways:

- By typing "gmake install.sgi" when I want to build for SGI, 
  "gmake install.sun4" to build for sun4, etc.  For most applications this
  seems to work fine, i.e. the CONFIG_SITE file is then ignored.  With this
  method, simultaneous builds are possible.

- For those cases where this does not work I have 3 different CONFIG_SITE
  files (CONFIG_SITE.my_sgi, etc.). I make a temporary soft-link from 
  CONFIG_SITE to these files.  This obviously precludes truly simultaneous
  builds.

____________________________________________________________
Mark Rivers                             (312) 702-2279 (office)
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