AMD64 support

adrian_sev · November 5, 2004, 12:49pm

Hi ! I want to ask about amd64 support in ROOT . It is supported ? can there be problems regarding differences in long definitions ? (like to have different results from the same script that was used on a 32 bit platform and a 64 bit platform ) .Thank you

brun · November 6, 2004, 6:44pm

Yes it is supported.
To see the list of supported platforms when you install ROOT from source, do:
./configure --help

You will get a long list of supported platforms and the corresponding options. For AMD, you can choose
linuxx8664gcc for compiling with gcc
or
linuxx8664icc for compiling with the Intel icc compiler

Rene

brun · November 6, 2004, 6:45pm

In my previous post, I forgot to add that we have a data type Long64_t
(and ULong64_t) that guarantee 64 bits integers on all supported platforms.

Rene

adrian_sev · November 8, 2004, 8:38am

Thank you very much! Thats also means that each particular use of ROOT ( like AliROOT and AliEn ) would function without any problems on an cluster of opterons ? I want to be sure and to use your answer against reluctance in face of new technology ))