We do not have an experience in integrating old CodeWarrior 8.8 compiler to modern Eclipse IDE.
Our current versions of CodeWarrior, including CodeWarrior for Power Architecture 10.5 you mentioned, is now based on Eclipse IDE, but this version of CodeWarrior does not support old processors. Note MPC885 is very old processor, announced more than 15 years ago, so we do not expect our customers will use this processor in new designs, I assume you are using this processor in some existing product. To support existing customer designs, we still offer old CodeWarrior 8.8 compiler with classic IDE, just to have a possibility to open old CodeWarrior project and make necessary changes, but we do not expect this old CodeWarrior 8.8 (or its compiler), will be used to develop a new software for MPC885, because the processor is very old.
CodeWarrior compiler is known as most effective compiler for our Power Architecture processors, for other third-party software vendors please look processor product page, "Software & Tools" tab:
https://www.nxp.com/products/processors-and-microcontrollers/power-architecture-processors/powerquic...