Unless atlc is configured with the --disable-hardware-info option 
(only do this if it fails to compile properly), a small benchmark at the end 
tries to gather information about the hardware. The following shows 
what information is obtained on each system. 

If anyone can add to the information gathered on a system, or add
information on a new system, please email me and discuss how to 
do this. Basically a C file in the tests subdirectory needs expanding
or adding (say try_foo.c), where the system tries to gather data on
system foo. 

Feature                                 Operating system

                           AIX HP-UX IRIX Linux NetBSD OpenBSD Solaris Tru64
Harware provider            Y                                     Y      
Hardware platform                                                 Y      Y
Machine                     Y    Y          Y                     Y      Y
Sysname                     Y    Y          Y                     Y      Y
Release                     #1   Y          Y                     Y      Y
Nodename                    Y    Y          Y                     Y      Y
#CPUs supported                  Y                                Y      Y
#CPUs online                Y    Y                                Y      Y
CPU type                         #2         Y                     Y      Y
FPU type                         #3                               Y
Speed of CPU(s)                  Y                                Y      Y
RAM size (Mb)               Y    Y          #4                    Y      Y
L1 data cache size                                                    
L1 instruction cache size                                            
L2 cache size

Feature                                 Operating system

                           UNICOS 
Harware provider            Y      
Hardware platform            
Machine                     Y  
Sysname                     
Release                  
Nodename               
#CPUs supported           
#CPUs online            
CPU type                    
FPU type                   
Speed of CPU(s)           
RAM size (Mb)          
L1 data cache size                                                    
L1 instruction cache size                                            
L2 cache size

Notes:

#1 On AIX, the release is reported as 2, not 5.2 as expected. 
#2 on HP-UX, the CPU is reported as  a number, which might not be that 
useful.
#3 on HP-UX, the FPU is reported as  a number, which might not be that 
useful.
#4 On a machine with 128 Mb of RAM, the ram is reported on Linux as
124 Mb, not 128 Mb as expected.