Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Wed, 05 Apr 2006 09:58:33 -0500

Eric Norum wrote:

True, and EPICS already has the configure/os/xxxx files
('EPICS_HOST_ARCH=darwin-fat') for this. It does double the compile
time and object module sizes, though. I'm not sure that machines are
fast enough and disks big enough for this to no longer be a problem. I
guess the easiest approach is to have the EpicsHostArch shell and perl
scripts return darwin-fat. If you want faster builds and smaller files
you would manually set EPICS_HOST_ARCH to darwin-ppc or darwin-x86 as
appropriate.
Are you OS X users out there okay with this?

Personally I'd prefer that the script tell you exactly what machine it's
running on, and if you want something more generic you override it
manually. The perl code could use `uname -m` to find out what machine
it's running on exactly like the shell version does.
Note that that the perl %Config hash is not derived from the binary
actually running, it uses information from the installed library files
which may have to be the same on both archs anyway, so Perl may *never*
know what its own CPU architecture is that way (that's my guess anyhow).
- Andrew
--
There is no S in exprexxo.

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System