Which ARM toolkit do I need?

Symbian specify the version of the RealView Compilation Tools (RVCT) needed to build each version of their OS.  For example, to build the Symbian OS v9.1, Symbian's web site currently suggests that "RVCT 2.2 build 435 or later" is required:

http://www.symbian.com/developer/techlib/v9.1docs/doc_source/N10356/BuildTools/native/arm5.html

Symbian are free to change this at any time, so you should contact Symbian directly to check for their latest recommendation.

Where can I get RVCT 2.2 build 435?

To create the required RVCT 2.2 build 435 configuration, you will need to either:

• obtain the original version of RVDS 2.2, which has RVCT 2.2 build 349, and apply a build 435 update patch, which you can download from:
  
  http://www.arm.com/support/downloads/rvds22.html

or

• obtain RVDS 2.2 Service Pack 1, which has RVCT 2.2 build 503, then 'downgrade' to build 435 by applying the same patch as above.

Can I use a different release of the Compilation Tools ?

Symbian explicitly specify tools versions and build numbers for use with specific Symbian OS releases.  If you wish to use a non-recommended version of the compiler with your Symbian release, please contact Symbian directly to discuss any possible issues that may be encountered.  Note that ARM provide no support for the use of Symbian OS.

Can I use the RVDS 2.2 Evaluation CD?

Sorry, no.  The RVDS 2.2 Evaluation version does not have RVCT 2.2 build 435, nor can it be patched.

Finally, if you have any specific technical questions about building Symbian or their SDK, you will need to contact Symbian directly.