This is quite a guide if I do say so myself. A great place start before trying to porting from Solaris to Linux on Power.

Generally, porting Solaris-based applications to Linux is a simple task since both Solaris and Linux are based on UNIX®. Porting often requires only a recompile with minor changes in some compiler and linker switches. Only when applications depend on system-specific implementations do they require major modifications. While both Solaris and Linux are designed to follow standards, differences in their implementations sometimes occur. This guide highlights these differences and recommends possible solutions, if an equivalent on the Linux side is not available. [Read the rest]