If you are not installing the Pro*C precompiler, this message can be safely ignored by checking the box "Ignore all" and pressing "Next" and continue with installation.
If you wish to install the Pro*C precompiler, please install Sun Studio 12 plus patch 124861-15 (NOT Sun Studio 12 Update 1) before installing the Oracle software
Ref - BUG:9214210
Thanks to Metalink note id - 969497.1