Re: 64-bit EPICS anyone?

["Zhijian Yin (ZY)" <zyin@bnl.gov>]

Hi, Ernest,

Just like you, I am trying to compile epics for a AMD64 linux box.  I am 
running Debian.

Compiling epics base stalls, because  
$(EPICS)/base/startup/EpicsHostArch.pl(and EpicsHostArch shell script) 
reports amd64 as "unsupported".

I found a quick and dirty fix is to add x86_64 to the cpu list for 
x86-linux, i.e., change EpicsHostArch script to

case $sysname in
   Linux )
       os=linux
               cpu=`uname -m`
       case $cpu in i386 | i486 | i586 | i686 | x86_64 )          ### 
added x86_64
           cpu=x86

And change the related lines in EpicsHostArch.pl to

sub GetEpicsHostArch { # no args
   $arch=$Config{'archname'};
   if ($arch =~ /sun4-solaris/)       { return "solaris-sparc";
   } elsif ($arch =~ m/i86pc-solaris/) { return "solaris-x86";
   } elsif ($arch =~ m/sun4-sunos/)    { return "sun4-68k";
   } elsif ($arch =~ m/i[3-6]86-linux/)    { return "linux-x86";
   } elsif ($arch =~ m/x86_64/)    { return 
"linux-x86";                   ####this is a newly added line
   } elsif ($arch =~ m/MSWin32-x86/)   { return "win32-x86";
   } elsif ($arch =~ m/cygwin/)        { return "cygwin-x86";
   } elsif ($arch =~ m/PA-RISC1.1/)    { return "hpux-parisc";
   } elsif ($arch =~ m/darwin/)        { return "darwin-ppc";
   } else { return "unsupported"; }
}


The idea is to have 'uname -m' (which reports as x86_64 for AMD64) as 
linux-x86 for epics. 

Recompilation works fine.  Since it uses x86_64 libs, the build is 64bit.

A better way probably is as what you suggested, add x86_64 as a seperate 
architecture.  I think you can just copy the linux-x86 files.


ZY


Ernest L. Williams Jr. wrote:

> Hi,
>
> I have an AMD64 linux box running redhat linux and want to build both a
> 32-bit and 64-bit version of EPICS BASE.
>
> Before we get started, I wanted to check the community for EPICS running
> on AMD64 natively.  Is anyone doing this?
>
> I would like to start with just building EPICS R3.14 natively against an
> ADM64 Opteron architecture.  Not interested in cross-compiling yet (i.e.
> let's forget about vxWorks for now).
>
> Of course, we will need new configuration files in
> "<EPICS_BASE/configure/os>"
>
> I supposed they would look like so:
> ================================================
> CONFIG.Common.linux-x86_64
> CONFIG.Common.linux-x86_64-debug
> CONFIG.linux-x86_64.Common
> CONFIG.linux-x86_64-debug.Common
> CONFIG.linux-x86_64-debug.linux-x86_64-debug
> CONFIG.linux-x86_64.linux-x86_64
> CONFIG.linux-x86_64.linux-x86_64-debug
> CONFIG_SITE.Common.linux-x86_64
> CONFIG_SITE.linux-x86_64.Common
> CONFIG_SITE.linux-x86_64-debug.linux-x86_64-debug
> CONFIG_SITE.linux-x86_64.linux-x86_64
> CONFIG_SITE.linux-x86_64.UnixCommon
> =================================================
>
> Thanks,
> Ernest L. Williams Jr.
> SNS Control Systems Group
> ORNL
>
>
>
>