Description of compiler flags for Intel C++ Compiler 7.1 for Red Hat Linux 7.3
------------------------------------------------------------------------------
-O1		Enables optimizations
		Optimizes for speed
		Disables inline expansion of library functions.

-O2		Equivalent to option -O1

-O3		Builds on -O1 and -O2 by enabling high-level optimization.
		This level does not guarantee higher performance unless
		loop and memory access transformation take place. In
		conjunction with -axK/-xK, this switch causes the compiler
		to perform more aggressive data dependency analysis than
		for -O2. This may result in longer compilation times. 

-ipo		multi-file ip optimizations that includes:
		  - inline function expansion
		  - interprocedural constant propogation
		  - monitoring module-level static variables
		  - dead code elimination
		  - propagation of function characteristics
		  - multifile optimization
		  - passing arguments in registers
		  - loop-invariant code motion

-xW		Generates specialized code for Intel Pentium 4 processors,
		Intel Xeon processors, and Intel Pentium M processors.

-prof_gen[x]	Instruments the program to prepare for instrumented
		execution and also creates a new static profile
		information file (.spi ). With the x qualifier, extra
		information is gathered.

-prof_use	Uses dynamic feedback information.a

-rcd		Enables fast float-to-int conversion.


Description of compiler flags for Intel Fortran Compiler 7.1 for Red Hat Linux 7.3
----------------------------------------------------------------------------------
-O1		Optimizes for speed. Disables -fp option.

-O2		Equivalent to option -O1

-O3		Enables -O2 option with more aggressive optimization and sets
		high-level optimizations, including loop transformation, OpenMP,
		and prefetching. High-level optimizations use the properties of
		source code constructs such as loops and arrays in applications
		written in high-level programming languages. Optimizes for
		maximum speed, but may not improve performance for some programs.

-ipo		Multifile IPO obtains potential optimization information from
		individual program modules of a multifile program. Using the
		information, the compiler performs optimizations across modules.

-xW		Generates specialized code for Intel Pentium 4 processors,
		Intel Xeon processors, and Intel Pentium M processors.

-prof_gen	Instruments the program for profiling: to get the execution
		count of each basic block. 

-prof_use	Enables the use of profiling dynamic feedback information
		during optimization.

-rcd		Disables changing of rounding mode for
		floating-point-to-integer conversions.


Portability options for CPU2000:
--------------------------------
176.gcc:     
   -Dalloca=_alloca       : so as to use the built-in optimized alloca
   -DUSG                  : Specify that the programming environment is
                            like System V Unix systems


178.galgel: 
   -FI                    : Fixed-format F90 source code. 

186.crafty: 
   -DLINUX_i386           : Specifies that it is a Linux Intel 
                            processor-based system which makes the compiler 
                            use "long long" as the 64-bit variable that 
                            186.crafty needs.        

252.eon
   -DHAS_ERRLIST          : Specify that the programming environment
                            provides a specification for "sys_errlist[]"

253.perlbmk: 
   -DSPEC_CPU2000_LINUX_i386 : This enables the code changes for porting to 
                            Linux on i386 architecture to be utilized
   -DSPEC_CPU2000_NEED_BOOL : This enables the code changes for use of the
                            SPEC provided definition of the boolean type
   -DSPEC_CPU2000_LINUX_GLIBC22 : This enables the code changes for
                            compatibility with the 2.2 and later versions of
                            the glibc libraries (also requires use of the
                            src.alt approved for these versions of glibc)

254.gap:
    -DSYS_IS_USG
    -DSYS_HAS_IOCTL_PROTO
    -DSYS_HAS_TIME_PROTO
    -DSYS_HAS_SIGNAL_PROTO
    -DSYS_HAS_CALLOC_PROTO
    -DSYS_HAS_ANSI	  : These defines specify the correct configuration
                            settings for the Linux/GlibC program environment