The 10.1 Intel product included two Intel compiler integrations as follows:
Intel integration version 3.1 was for use with Eclipse platform 3.2 and CDT 3.1. Our 3.1 integration supports ia32 and ia64 (Itanium). The Eclipse 3.2 platform and CDT version 3.1 also support both ia32 and ia64. These versions of Eclipse and CDT also supported Intel(R) 64 (x86_64), but our Intel 3.1 integration did not.
Intel integration version 4.0 was for use with Eclipse platform 3.3 and CDT 4.0. Our 4.0 integration supports ia32 and ia64 (Itanium). However, the Eclipse platform and CDT only supported ia32 of these two architectures, so only our ia32 integration is truly useful at this point in time. We include the ia64 integration in hopes that the Eclipse platform and CDT issues will be cleared up in the future. Also, it was still true that the Eclipse platform and CDT supported Intel(R) 64 (x86_64) but our compiler integration did not.
If you are interested in x86_64 support, you might want to follow our 11.0 product which is in beta testing. We are introducing our first compiler integration support for Intel(R) 64 (x86_64) in this release. It will also continue to support ia32. It will also continue to provide the ia64 compiler integration even though the Eclipse platform and CDT issues still remain.
Hope this helps...Bill