HITACHI BladeSymphony (1.66GHz/9MB Itanium2) C/C++ Compiler flag descriptions -fast : enable -O3 -ipo -static -O3 : enable optimizations plus more aggressive optimizations that may not improve performance for all programs -ipo : enable multi-file IP optimizations -static : prevents linking with shared libraries -ansi_alias : enable use of ANSI aliasing rules in optimizations; user asserts that the program adheres to these rules -IPF_fp_relaxed : enable use of faster but slightly less accurate code sequences for math functions -prof_gen : instrument program for profiling -prof_use : enable use of profiling information during optimization -auto_ilp32 : specify that the application cannot exceed a 32-bit address space