SPEChpc™ 2021 Make Variables

$Id$ Latest: www.spec.org/hpc2021/Docs/

Contents

1. Introduction

2. Which steps use which flags?

3. Items used in Makefile.defaults

4. Order of flag application

a. No feedback

b. Feedback (Not supported (SPEChpc)

1. Introduction

For SPEChpc you do not write your own Makefiles, nor do you use your platform's native make program. Instead, your config file supplies options that are sent to a SPEC-supplied copy of GNU make, known as specmake.

If you are asking questions like the following, this document is for you.

2. Which steps use which flags?

Y     indicates that an option affects a particular compilation phase
Y(D) is explained in Note 1.
Portability options
  specpp[1] Compiler Linker[2]
FPPPORTABILITY
EXTRA_FPPPORTABILITY		 Y
PORTABILITY
FPORTABILITY 		Y(D) Y Y
{C|CXX}PORTABILITY Y Y
EXTRA_PORTABILITY
EXTRA_FPORTABILITY 		Y(D) Y
EXTRA_{C|CXX}PORTABILITY Y
LDPORTABILITY
PORTABILITY_LIBS
PORTABILITY_{C|CXX|F}LIBS 		Y
 
Optimization options
  specpp[1] Compiler Linker[2]
FPPOPTIMIZE
EXTRA_FPPOPTIMIZE 		Y
OPTIMIZE
FOPTIMIZE
EXTRA_OPTIMIZE
EXTRA_FOPTIMIZE 		Y(D) Y Y
{C|CXX}OPTIMIZE
EXTRA_{C|CXX}OPTIMIZE 		Y Y
LDOPTIMIZE
OPTIMIZATION_LIBS
OPTIMIZATION_{C|CXX|F}LIBS		 Y
Additional options
  specpp[1] Compiler Linker[2]
FPPFLAGS
EXTRA_FPPFLAGS		Y
EXTRA_{C|CXX|F}FLAGSY
LDFLAGS
LD{C|CXX|F}FLAGS
EXTRA_LDFLAGS 		[3] Y
LIBS
OS_LIBS
EXTRA_LIBS
EXTRA_{C|CXX|F}LIBS
LDOPTIONS 		[4]
LDOUT_OPTIONS
LDOUT_EXTRA_OPTIONS
 
Multi-pass (FDO) build options
  specpp[1] Compiler Linker[2]
PASSn_FPPFLAGS Y
PASSn_OPTIMIZE
PASSn_FOPTIMIZE 		Y(D) Y Y
PASSn_{C|CXX}OPTIMIZE Y Y
PASSn_FLAGS Y Y
PASSn_{C|CXX|F}FLAGS Y
PASSn_LDFLAGS
PASSn_LD{C|CXX|F}FLAGS 		Y

[1] specpp: FPPP options are sent to specpp, a SPEC-supplied Fortran preprocessor. From Y(D) options, -Dx /Dx -Ux /Ux go to specpp (it does not see the rest). In the example, specpp sees the mumble request but not the endian request. The compiler sees the endian request but not the mumble request. (more detail) 

628.pot3d_s:
 FPORTABILITY = -DMUMBLE --endian-fix

[2] Linking: For multi-language benchmarks, the first one mentioned in the Documentation Index benchmarks table is considered "primary", meaning that only its flags are used for linking. In the example, the --bigpages switch is not used. (more detail) 

628.pot3d_s=peak: # primary is Fortran
 LDFFLAGS     = -link:shared  # used
 EXTRA_LDCFLAGS = --bigpages # ignored

[3] objects: The list of object files is inserted just before the library options. (more detail)

[4] LDOUT: The flag that specifies the destination (typically -o or -Fe) is inserted just before the LDOUT_OPTIONS. (more detail)

3. Items used in Makefile.defaults

Build settings come from three sources:

  1. Benchmark definition files

    $SPEC/benchspec/HPC/<benchmark>/Spec/object.pm

  2. A file called Makefile.spec, which is generated from your config file. It is found in

    $SPEC/benchspec/HPC/<benchmark>/build/build_<tune>_<label>.nnnn/Makefile.spec

  3. The overall control file which is used by all benchmarks, and which contains most of the build rules:

    $SPEC/benchspec/Makefile.defaults

The list above is in order from highest to lowest priority. That is, if a setting for a particular variable exists in object.pm, it cannot be overridden. Variables not specified in object.pm can be set by the user in the config file and thus in Makefile.spec. If a setting is needed, and does not appear in either of those two places, a reasonable default is provided by Makefile.defaults.

Do you need to worry about all three of these?

  1. Usually you do not need to think about settings from object.pm because these set very basic choices that define a benchmark, for example switches to include benchmark header files, disable use of MPI, or disable code that is known to be non-portable. (If you believe that a flag defined in object.pm causes a problem, you may write to SPEC.)
  2. Usually, you do need to think about settings in your own config file.
  3. Occasionally, you might want to see how your config file settings interact with Makefile.defaults, especially if you are adept at reading GNU makefiles.

This section is addressed to such readers. The table below briefly describes nearly all the items in Makefile.defaults and classifies by type:

    config   = If you wish, you are free to set this in your config file.
    bench    = The benchmark sets it in Spec/object.pm.  Do not attempt to touch.
    tools    = Something computed by SPEC tools.  Really do not touch.
    xdebug   = eXtra item for debug, normally useful only during development.

Type    Item                 Meaning
-----   -------------------  --------------------------------------------------------------------------------------------------
bench   BENCHLANG            Benchmark language; one of C, CXX, F, F77
tools   BENCHMARK            The formal benchmark name, e.g. 999.specrand
bench   BENCH_CFLAGS         Benchmark specific C flags predefined by SPEC; cannot be changed
bench   BENCH_CXXFLAGS       Benchmark specific C++ flags predefined by SPEC; cannot be changed
bench   BENCH_FFLAGS         Benchmark specific Fortran flags predefined by SPEC; cannot be changed
bench   BENCH_FLAGS          Benchmark specific flags predefined by SPEC; cannot be changed
bench   BENCH_FPPFLAGS       Benchmark specific Fotran preprocessor flags predefined by SPEC; cannot be changed
config  CC                   How to invoke your C compiler
config  CLD                  How to invoke the linker when building C programs (default: CC)
config  COBJOPT              Special OBJOPT for C.   Defaults to same as OBJOPT.
config  COPTIMIZE            Optimization flags to be used when compiling and when linking C programs
config  CPORTABILITY         Portability options to be applied when compiling and when linking C programs
tools   CPUFLAGS             Macros defined on a suite-wide basis for C, C++, and preprocessed Fortran codes
config  CXX                  How to invoke your C++ compiler
tools   CXXC                 Same as CXX.  A minor coding trick uses this to help figure out how to invoke linker.
config  CXXLD                How to invoke the linker when building C++ programs (default: CXX)
config  CXXOBJOPT            Special OBJOPT for C++.   Defaults to same as OBJOPT.
config  CXXOPTIMIZE          Optimization flags to be used when compiling and when linking C++ programs
config  CXXPORTABILITY       Portability options to be applied when compiling and when linking C++ programs
config  ECHO                 How to spell "echo" command.  Defaults to 'echo'.
bench   EXEBASE              Name of the base benchmark executable (without label or tuning information)
config  EXTRA_CFLAGS         Additional flags to use when compiling and when linking C programs
config  EXTRA_CLIBS          Additional libraries to link in to C benchmarks.
config  EXTRA_COPTIMIZE      Additional optimization flags to pass to your C compiler
config  EXTRA_CPORTABILITY   Additional portability flags to pass to your C compiler (not used when linking)
config  EXTRA_CXXFLAGS       Additional flags to use when compiling and when linking C++ programs
config  EXTRA_CXXLIBS        Additional libraries to link in to C++ benchmarks.
config  EXTRA_CXXOPTIMIZE    Additional optimization flags to pass to your C++ compiler
config  EXTRA_CXXPORTABILITY Additional portability flags to pass to your C++ compiler (not used when linking)
config  EXTRA_FFLAGS         Additional flags to use when compiling and when linking Fortran programs
config  EXTRA_FLIBS          Additional libraries to link in to Fortran and mixed-language benchmarks.
config  EXTRA_FOPTIMIZE      Additional optimization flags to pass to your Fortran compiler
config  EXTRA_FPORTABILITY   Additional portability flags to pass to your Fortran compiler (not used when linking)
config  EXTRA_FPPFLAGS       Additional flags to pass to Fortran preprocessor
config  EXTRA_LDFLAGS        Additional flags to pass to your linker
config  EXTRA_LIBS           Extra libraries to appear at the end of the link command
config  EXTRA_OPTIMIZE       Additional flags to pass to all compilers
config  EXTRA_PORTABILITY    Additional portability flags to pass to all compilers (not used when linking)
config  EXTRA_RMFILES        Additional files to be deleted before a build
config  EXTRA_SOURCES        Sources to add when doing a build. Must be explained to SPEC!
config  FC                   How to invoke your Fortran-90 compiler
tools   FDO                  The current build pass number (for FDO builds only)
tools   FDO_COPTIMIZE        Optimization flags to pass to the C compiler to do the current FDO pass
tools   FDO_CXXOPTIMIZE      Optimization flags to pass to the C++ compiler to do the current FDO pass
tools   FDO_FOPTIMIZE        Optimization flags to pass to the Fortran compiler to do the current FDO pass
tools   FDO_LDCFLAGS         For the linker used with C programs, flags to pass to the linker to do the current FDO pass
tools   FDO_LDCXXFLAGS       For the linker used with C++ programs, flags to pass to the linker to do the current FDO pass
tools   FDO_LDFFLAGS         For the linker used with Fortran programs, flags to pass to the linker to do the current FDO pass
tools   FDO_LDFLAGS          Flags to pass to the linker to do the current FDO pass
tools   FDO_OPTIMIZE         Optimization flags for the current FDO pass
tools   FINAL_CFLAGS         Full list of flags passed to C compiler
tools   FINAL_CXXFLAGS       Full list of flags passed to C++ compiler
tools   FINAL_FFLAGS         Full list of flags passed to F90 compiler
tools   FINAL_FPPFLAGS       Full list of flags passed to Fortran preprocessor
tools   FINAL_LDOPT          Full list of flags passed to linker
tools   FINAL_LIBS           Full list of libraries
tools   FINAL_SOURCES        Full list of source files to be used for compilation
config  FLD                  How to invoke the linker when building Fortran programs (default: FC)
config  FOBJOPT              Special OBJOPT for f90.   Defaults to same as OBJOPT.
config  FOPTIMIZE            Optimization flags to be used when compiling and when linking Fortran programs
config  FPORTABILITY         Portability options to be applied when compiling and when linking Fortran programs
config  FPPFLAGS             Flags to be added to Fortran preprocessor
config  FPPPORTABILITY       Portability flags to be added to Fortran preprocessor
tools   FPP_USED             Does this benchmark use the Fortran preprocessor?
config  LABEL                Desired label for the object files.  Set via 'label' in config file or '--label' on command line.
tools   LD                   The name of your linker.  Do not set this directly; set the language specific value (CLD, FLD, etc)
config  LDCFLAGS             Flags to add to link lines used for C builds
config  LDCXXFLAGS           Flags to add to link lines used for C++ builds
config  LDFFLAGS             Flags to add to link lines used for Fortran benchmarks or benchmarks that use both Fortran and C
config  LDFLAGS              Flags to add to link lines for all languages
config  LDOPTIMIZE           Optimization flags for the linker 
config  LDOPTIONS            Additional options to supply to the linker 
tools   LDOPTFLAGS           Optimization flags supplied to the linker
config  LDOUT                Linker flag used to specify an output file.  Defaults to '-Fe$@' on Windows and '-o $@' elsewhere.
config  LDOUT_OPTIONS        Flags that need to appear after LDOUT 
config  LDOUT_EXTRA_OPTIONS  More flags that need to appear after LDOUT 
config  LDPORTABILITY        Portability flags to be used when linking
config  LIBS                 Libraries to link into the final executable
config  MATHLIBOPT           Set of math libraries (if any) to link into the final executable
tools   MATH_LIBS            Set of math libraries (if any) to link into the final executable (just $MATHLIBOPT again)
bench   NAME                 The benchmark name, e.g. dealII
config  NEEDATFILE           Reduce length of command lines by using @files. (Set NEEDATFILE=1 to enable the feature.)
bench   NEED_MATH            Flag telling whether or not the benchmark needs to be linked with the math libraries
bench   NUMBER               The benchmark number, e.g. 447
config  OBJ                  The file name extension for object files.  Defaults to '.obj' on Windows and '.o' elsewhere
tools   OBJNAMES             Name of a file to store the names of the object files
config  OBJOPT               Option to compile and name an output file. Defaults to "-c -Fo$@" on Windows and "-c -o $@" elsewhere.
tools   OBJS                 List of object files needed to link the final executable
config  OPTIMIZATION_LIBS    Libraries used for optimization purposes, to be added to all builds
config  OPTIMIZATION_CLIBS   Libraries used for optimization purposes, to be added to C builds
config  OPTIMIZATION_CXXLIBS Libraries used for optimization purposes, to be added to C++ builds
config  OPTIMIZATION_FLIBS   Libraries used for optimization purposes, to be added to Fortran and mixed C and Fortran builds
config  OPTIMIZE             Optimization flags.  Typically used only for a single benchmark.
tools   OS                   Name of OS being used.  Supplied automatically by specmake.
config  OS_LIBS              List of OS-specific libs to link with
tools   OUTPUT_RMFILES       Files to be cleaned bewteen builds
tools   PMODEL               Used to set the define flag to enable conditional compilation of a node level parallel model
config  PASSn_*              PASSn_ may prefixed to these, to add to that option only for the nth pass:
                              LDOPT  FLAGS    OPTIMIZE     LDFLAGS      
                                     CFLAGS   COPTIMIZE    LDCFLAGS
                                     CXXFLAGS CXXOPTIMIZE  LDCXXFLAGS
                                     FFLAGS   FOPTIMIZE    LDFFLAGS 
config  PORTABILITY          Portability options to be applied to all steps for all programs
config  PORTABILITY_CLIBS    Portability libraries to link in with C benchmarks.
config  PORTABILITY_CXXLIBS  Portability libraries to link in with C++ benchmarks.
config  PORTABILITY_FLIBS    Portability libraries to link in with Fortran and mixed-language benchmarks.
config  PORTABILITY_LIBS     Portability libraries to link in with all benchmarks.
xdebug  PPCFLAGS             Flags that enable your C preprocessor
xdebug  PPCXXFLAGS           Flags that enable your C++ preprocessor
xdebug  PPFLAGS              Flags that enable your C/C++ preprocessor
xdebug  PP_SOURCES           List of preprocessed sources
tools   PRIMARY_BENCHLANG    Primary benchmark language; one of C, CXX, F, F77                                                                        
tools   RAW_FFLAGS           Temporary variable, used while figuring out final flag list
config  RMRF                 The name of a program (with arguments, if necessary) that can be used to delete a directory tree.   
config  RM_SOURCES           Sources to exclude from a build.  Must explained to SPEC!
bench   SOURCES              What the benchmark/src/Makefile expects will normally be used
tools   TARGET               Benchmarks with multiple executables use Makefile.exename.spec.  runhpc sets TARGET=exename
tools   tmpBENCHLANG         Temporary variable, used while figuring out languages
tools   TMP1_SOURCES         Temporary variable, used while figuring out final source file list
tools   TMP2_SOURCES         Temporary variable, used while figuring out final source file list
tools   TMP3_SOURCES         Temporary variable, used while figuring out final source file list
tools   TMP_SOURCES          Temporary variable, used while figuring out final source file list
tools   TUNE                 The tuning currently being used (to set in config file, use tune=)

4. Order of flag application

Sometimes, you may need more detail about flag order and presence (e.g. Is OPTIMIZE applied before or after COPTIMIZE?) In such cases, you have several choices:

  1. You can do a fake build. In practice, this is often the easiest, and is highly recommended. Fake is your friend.
  2. You can read Makefile.defaults, in conjunction with the previous section.
  3. You can consult the lists below, which show where all user-settable variables end up (position-wise). The lists are automatically generated from Makefile.defaults and therefore may save you considerable time versus trying to read it on your own.

4.a. No feedback


C only:
Compilation: CC COBJOPT <object> -DSPEC -DNDEBUG BENCH_FLAGS BENCH_CFLAGS OPTIMIZE COPTIMIZE PORTABILITY CPORTABILITY EXTRA_CFLAGS
             EXTRA_OPTIMIZE EXTRA_COPTIMIZE EXTRA_PORTABILITY EXTRA_CPORTABILITY <source>
Linkage: CLD(or CC) LDFLAGS LDCFLAGS EXTRA_LDFLAGS OPTIMIZE COPTIMIZE LDOPTIMIZE PORTABILITY CPORTABILITY LDPORTABILITY
         EXTRA_OPTIMIZE EXTRA_COPTIMIZE <objects> LIBS OS_LIBS MATH_LIBS OPTIMIZATION_LIBS OPTIMIZATION_CLIBS PORTABILITY_LIBS
         PORTABILITY_CLIBS EXTRA_LIBS EXTRA_CLIBS LDOPTIONS LDOUT LDOUT_OPTIONS LDOUT_EXTRA_OPTIONS

C++ only:
Compilation: CXX CXXOBJOPT <object> -DSPEC -DNDEBUG BENCH_FLAGS BENCH_CXXFLAGS OPTIMIZE CXXOPTIMIZE PORTABILITY CXXPORTABILITY
             EXTRA_CXXFLAGS EXTRA_OPTIMIZE EXTRA_CXXOPTIMIZE EXTRA_PORTABILITY EXTRA_CXXPORTABILITY <source>
Linkage: CXXLD(or CXX) LDFLAGS LDCXXFLAGS EXTRA_LDFLAGS OPTIMIZE CXXOPTIMIZE LDOPTIMIZE PORTABILITY CXXPORTABILITY LDPORTABILITY
         EXTRA_OPTIMIZE EXTRA_CXXOPTIMIZE <objects> LIBS OS_LIBS MATH_LIBS OPTIMIZATION_LIBS OPTIMIZATION_CXXLIBS PORTABILITY_LIBS
         PORTABILITY_CXXLIBS EXTRA_LIBS EXTRA_CXXLIBS LDOPTIONS LDOUT LDOUT_OPTIONS LDOUT_EXTRA_OPTIONS

Fortran only:
FPP: specpp FPPFLAGS -DSPEC -DNDEBUG <-D & -U from BENCH_FLAGS> BENCH_FPPFLAGS <-D & -U from OPTIMIZE> <-D & -U from FOPTIMIZE>
     FPPOPTIMIZE <-D & -U from PORTABILITY> <-D & -U from FPORTABILITY> FPPPORTABILITY EXTRA_FPPFLAGS <-D & -U from EXTRA_OPTIMIZE>
     <-D & -U from EXTRA_FOPTIMIZE> EXTRA_FPPOPTIMIZE <-D & -U from EXTRA_PORTABILITY> <-D & -U from EXTRA_FPORTABILITY>
     EXTRA_FPPPORTABILITY <source> -o <source>.fppized.f9x
Compilation: FC FOBJOPT <object> BENCH_FLAGS BENCH_FFLAGS OPTIMIZE FOPTIMIZE PORTABILITY FPORTABILITY EXTRA_FFLAGS EXTRA_OPTIMIZE
             EXTRA_FOPTIMIZE EXTRA_PORTABILITY EXTRA_FPORTABILITY <source>
Linkage: FLD(or FC) LDFLAGS LDFFLAGS EXTRA_LDFLAGS OPTIMIZE FOPTIMIZE LDOPTIMIZE PORTABILITY FPORTABILITY LDPORTABILITY
         EXTRA_OPTIMIZE EXTRA_FOPTIMIZE <objects> LIBS OS_LIBS MATH_LIBS OPTIMIZATION_LIBS OPTIMIZATION_FLIBS PORTABILITY_LIBS
         PORTABILITY_FLIBS EXTRA_LIBS EXTRA_FLIBS LDOPTIONS LDOUT LDOUT_OPTIONS LDOUT_EXTRA_OPTIONS

Mixed C++ and C:
Compilation: CXX CXXOBJOPT <object> -DSPEC -DNDEBUG BENCH_FLAGS BENCH_CXXFLAGS OPTIMIZE CXXOPTIMIZE PORTABILITY CXXPORTABILITY
             EXTRA_CXXFLAGS EXTRA_OPTIMIZE EXTRA_CXXOPTIMIZE EXTRA_PORTABILITY EXTRA_CXXPORTABILITY <source>
Compilation: CC COBJOPT <object> -DSPEC -DNDEBUG BENCH_FLAGS BENCH_CFLAGS OPTIMIZE COPTIMIZE PORTABILITY CPORTABILITY EXTRA_CFLAGS
             EXTRA_OPTIMIZE EXTRA_COPTIMIZE EXTRA_PORTABILITY EXTRA_CPORTABILITY <source>
Linkage: CXXLD(or CXX) LDFLAGS LDCXXFLAGS EXTRA_LDFLAGS OPTIMIZE CXXOPTIMIZE LDOPTIMIZE PORTABILITY CXXPORTABILITY LDPORTABILITY
         EXTRA_OPTIMIZE EXTRA_CXXOPTIMIZE <objects> LIBS OS_LIBS MATH_LIBS OPTIMIZATION_LIBS OPTIMIZATION_CXXLIBS PORTABILITY_LIBS
         PORTABILITY_CXXLIBS EXTRA_LIBS EXTRA_CXXLIBS LDOPTIONS LDOUT LDOUT_OPTIONS LDOUT_EXTRA_OPTIONS

Mixed Fortran and C:
FPP: specpp FPPFLAGS -DSPEC -DNDEBUG <-D & -U from BENCH_FLAGS> BENCH_FPPFLAGS <-D & -U from OPTIMIZE> <-D & -U from FOPTIMIZE>
     FPPOPTIMIZE <-D & -U from PORTABILITY> <-D & -U from FPORTABILITY> FPPPORTABILITY EXTRA_FPPFLAGS <-D & -U from EXTRA_OPTIMIZE>
     <-D & -U from EXTRA_FOPTIMIZE> EXTRA_FPPOPTIMIZE <-D & -U from EXTRA_PORTABILITY> <-D & -U from EXTRA_FPORTABILITY>
     EXTRA_FPPPORTABILITY <source> -o <source>.fppized.f9x
Compilation: FC FOBJOPT <object> BENCH_FLAGS BENCH_FFLAGS OPTIMIZE FOPTIMIZE PORTABILITY FPORTABILITY EXTRA_FFLAGS EXTRA_OPTIMIZE
             EXTRA_FOPTIMIZE EXTRA_PORTABILITY EXTRA_FPORTABILITY <source>
Compilation: CC COBJOPT <object> -DSPEC -DNDEBUG BENCH_FLAGS BENCH_CFLAGS OPTIMIZE COPTIMIZE PORTABILITY CPORTABILITY EXTRA_CFLAGS
             EXTRA_OPTIMIZE EXTRA_COPTIMIZE EXTRA_PORTABILITY EXTRA_CPORTABILITY <source>
Linkage: FLD(or FC) LDFLAGS LDFFLAGS EXTRA_LDFLAGS OPTIMIZE FOPTIMIZE LDOPTIMIZE PORTABILITY FPORTABILITY LDPORTABILITY
         EXTRA_OPTIMIZE EXTRA_FOPTIMIZE <objects> LIBS OS_LIBS MATH_LIBS OPTIMIZATION_LIBS OPTIMIZATION_FLIBS PORTABILITY_LIBS
         PORTABILITY_FLIBS EXTRA_LIBS EXTRA_FLIBS LDOPTIONS LDOUT LDOUT_OPTIONS LDOUT_EXTRA_OPTIONS

Mixed C++, C, and Fortran:
Compilation: CXX CXXOBJOPT <object> -DSPEC -DNDEBUG BENCH_FLAGS BENCH_CXXFLAGS OPTIMIZE CXXOPTIMIZE PORTABILITY CXXPORTABILITY
             EXTRA_CXXFLAGS EXTRA_OPTIMIZE EXTRA_CXXOPTIMIZE EXTRA_PORTABILITY EXTRA_CXXPORTABILITY <source>
Compilation: CC COBJOPT <object> -DSPEC -DNDEBUG BENCH_FLAGS BENCH_CFLAGS OPTIMIZE COPTIMIZE PORTABILITY CPORTABILITY EXTRA_CFLAGS
             EXTRA_OPTIMIZE EXTRA_COPTIMIZE EXTRA_PORTABILITY EXTRA_CPORTABILITY <source>
Compilation: FC FOBJOPT <object> BENCH_FLAGS BENCH_FFLAGS OPTIMIZE FOPTIMIZE PORTABILITY FPORTABILITY EXTRA_FFLAGS EXTRA_OPTIMIZE
             EXTRA_FOPTIMIZE EXTRA_PORTABILITY EXTRA_FPORTABILITY <source>
Linkage: CXXLD(or CXX) LDFLAGS LDCXXFLAGS EXTRA_LDFLAGS OPTIMIZE CXXOPTIMIZE LDOPTIMIZE PORTABILITY CXXPORTABILITY LDPORTABILITY
         EXTRA_OPTIMIZE EXTRA_CXXOPTIMIZE <objects> LIBS OS_LIBS MATH_LIBS OPTIMIZATION_LIBS OPTIMIZATION_CXXLIBS PORTABILITY_LIBS
         PORTABILITY_CXXLIBS EXTRA_LIBS EXTRA_CXXLIBS LDOPTIONS LDOUT LDOUT_OPTIONS LDOUT_EXTRA_OPTIONS

4.b. Feedback (Not supported in SPEChpc 2021)

In this section, "PASSn" indicates the pass number for FDO, where n is 1, 2, etc.


C only:
Compilation: CC COBJOPT <object> -DSPEC -DNDEBUG BENCH_FLAGS BENCH_CFLAGS PASSn_FLAGS PASSn_CFLAGS OPTIMIZE COPTIMIZE
             PASSn_OPTIMIZE PASSn_COPTIMIZE PORTABILITY CPORTABILITY EXTRA_CFLAGS EXTRA_OPTIMIZE EXTRA_COPTIMIZE EXTRA_PORTABILITY
             EXTRA_CPORTABILITY <source>
Linkage: CLD(or CC) LDFLAGS LDCFLAGS EXTRA_LDFLAGS PASSn_LDFLAGS PASSn_FLAGS PASSn_LDCFLAGS OPTIMIZE COPTIMIZE PASSn_OPTIMIZE
         PASSn_COPTIMIZE LDOPTIMIZE PORTABILITY CPORTABILITY LDPORTABILITY EXTRA_OPTIMIZE EXTRA_COPTIMIZE <objects> LIBS OS_LIBS
         MATH_LIBS OPTIMIZATION_LIBS OPTIMIZATION_CLIBS PORTABILITY_LIBS PORTABILITY_CLIBS EXTRA_LIBS EXTRA_CLIBS LDOPTIONS
         PASSn_LDOPTIONS LDOUT LDOUT_OPTIONS LDOUT_EXTRA_OPTIONS

C++ only:
Compilation: CXX CXXOBJOPT <object> -DSPEC -DNDEBUG BENCH_FLAGS BENCH_CXXFLAGS PASSn_FLAGS PASSn_CXXFLAGS OPTIMIZE CXXOPTIMIZE
             PASSn_OPTIMIZE PASSn_CXXOPTIMIZE PORTABILITY CXXPORTABILITY EXTRA_CXXFLAGS EXTRA_OPTIMIZE EXTRA_CXXOPTIMIZE
             EXTRA_PORTABILITY EXTRA_CXXPORTABILITY <source>
Linkage: CXXLD(or CXX) LDFLAGS LDCXXFLAGS EXTRA_LDFLAGS PASSn_LDFLAGS PASSn_FLAGS PASSn_LDCXXFLAGS OPTIMIZE CXXOPTIMIZE
         PASSn_OPTIMIZE PASSn_CXXOPTIMIZE LDOPTIMIZE PORTABILITY CXXPORTABILITY LDPORTABILITY EXTRA_OPTIMIZE EXTRA_CXXOPTIMIZE
         <objects> LIBS OS_LIBS MATH_LIBS OPTIMIZATION_LIBS OPTIMIZATION_CXXLIBS PORTABILITY_LIBS PORTABILITY_CXXLIBS EXTRA_LIBS
         EXTRA_CXXLIBS LDOPTIONS PASSn_LDOPTIONS LDOUT LDOUT_OPTIONS LDOUT_EXTRA_OPTIONS

Fortran only:
FPP: specpp FPPFLAGS -DSPEC -DNDEBUG <-D & -U from BENCH_FLAGS> BENCH_FPPFLAGS PASSn_FPPFLAGS <-D & -U from OPTIMIZE>
     <-D & -U from FOPTIMIZE> <-D & -U from PASSn_OPTIMIZE> <-D & -U from PASSn_FOPTIMIZE> FPPOPTIMIZE <-D & -U from PORTABILITY>
     <-D & -U from FPORTABILITY> FPPPORTABILITY EXTRA_FPPFLAGS <-D & -U from EXTRA_OPTIMIZE> <-D & -U from EXTRA_FOPTIMIZE>
     EXTRA_FPPOPTIMIZE <-D & -U from EXTRA_PORTABILITY> <-D & -U from EXTRA_FPORTABILITY> EXTRA_FPPPORTABILITY <source> -o
     <source>.fppized.f9x
Compilation: FC FOBJOPT <object> BENCH_FLAGS BENCH_FFLAGS PASSn_FLAGS PASSn_FFLAGS OPTIMIZE FOPTIMIZE PASSn_OPTIMIZE
             PASSn_FOPTIMIZE PORTABILITY FPORTABILITY EXTRA_FFLAGS EXTRA_OPTIMIZE EXTRA_FOPTIMIZE EXTRA_PORTABILITY
             EXTRA_FPORTABILITY <source>
Linkage: FLD(or FC) LDFLAGS LDFFLAGS EXTRA_LDFLAGS PASSn_LDFLAGS PASSn_FLAGS PASSn_LDFFLAGS OPTIMIZE FOPTIMIZE PASSn_OPTIMIZE
         PASSn_FOPTIMIZE LDOPTIMIZE PORTABILITY FPORTABILITY LDPORTABILITY EXTRA_OPTIMIZE EXTRA_FOPTIMIZE <objects> LIBS OS_LIBS
         MATH_LIBS OPTIMIZATION_LIBS OPTIMIZATION_FLIBS PORTABILITY_LIBS PORTABILITY_FLIBS EXTRA_LIBS EXTRA_FLIBS LDOPTIONS
         PASSn_LDOPTIONS LDOUT LDOUT_OPTIONS LDOUT_EXTRA_OPTIONS

Mixed C++ and C:
Compilation: CXX CXXOBJOPT <object> -DSPEC -DNDEBUG BENCH_FLAGS BENCH_CXXFLAGS PASSn_FLAGS PASSn_CXXFLAGS OPTIMIZE CXXOPTIMIZE
             PASSn_OPTIMIZE PASSn_CXXOPTIMIZE PORTABILITY CXXPORTABILITY EXTRA_CXXFLAGS EXTRA_OPTIMIZE EXTRA_CXXOPTIMIZE
             EXTRA_PORTABILITY EXTRA_CXXPORTABILITY <source>
Compilation: CC COBJOPT <object> -DSPEC -DNDEBUG BENCH_FLAGS BENCH_CFLAGS PASSn_FLAGS PASSn_CFLAGS OPTIMIZE COPTIMIZE
             PASSn_OPTIMIZE PASSn_COPTIMIZE PORTABILITY CPORTABILITY EXTRA_CFLAGS EXTRA_OPTIMIZE EXTRA_COPTIMIZE EXTRA_PORTABILITY
             EXTRA_CPORTABILITY <source>
Linkage: CXXLD(or CXX) LDFLAGS LDCXXFLAGS EXTRA_LDFLAGS PASSn_LDFLAGS PASSn_FLAGS PASSn_LDCXXFLAGS OPTIMIZE CXXOPTIMIZE
         PASSn_OPTIMIZE PASSn_CXXOPTIMIZE LDOPTIMIZE PORTABILITY CXXPORTABILITY LDPORTABILITY EXTRA_OPTIMIZE EXTRA_CXXOPTIMIZE
         <objects> LIBS OS_LIBS MATH_LIBS OPTIMIZATION_LIBS OPTIMIZATION_CXXLIBS PORTABILITY_LIBS PORTABILITY_CXXLIBS EXTRA_LIBS
         EXTRA_CXXLIBS LDOPTIONS PASSn_LDOPTIONS LDOUT LDOUT_OPTIONS LDOUT_EXTRA_OPTIONS

Mixed Fortran and C:
FPP: specpp FPPFLAGS -DSPEC -DNDEBUG <-D & -U from BENCH_FLAGS> BENCH_FPPFLAGS PASSn_FPPFLAGS <-D & -U from OPTIMIZE>
     <-D & -U from FOPTIMIZE> <-D & -U from PASSn_OPTIMIZE> <-D & -U from PASSn_FOPTIMIZE> FPPOPTIMIZE <-D & -U from PORTABILITY>
     <-D & -U from FPORTABILITY> FPPPORTABILITY EXTRA_FPPFLAGS <-D & -U from EXTRA_OPTIMIZE> <-D & -U from EXTRA_FOPTIMIZE>
     EXTRA_FPPOPTIMIZE <-D & -U from EXTRA_PORTABILITY> <-D & -U from EXTRA_FPORTABILITY> EXTRA_FPPPORTABILITY <source> -o
     <source>.fppized.f9x
Compilation: FC FOBJOPT <object> BENCH_FLAGS BENCH_FFLAGS PASSn_FLAGS PASSn_FFLAGS OPTIMIZE FOPTIMIZE PASSn_OPTIMIZE
             PASSn_FOPTIMIZE PORTABILITY FPORTABILITY EXTRA_FFLAGS EXTRA_OPTIMIZE EXTRA_FOPTIMIZE EXTRA_PORTABILITY
             EXTRA_FPORTABILITY <source>
Compilation: CC COBJOPT <object> -DSPEC -DNDEBUG BENCH_FLAGS BENCH_CFLAGS PASSn_FLAGS PASSn_CFLAGS OPTIMIZE COPTIMIZE
             PASSn_OPTIMIZE PASSn_COPTIMIZE PORTABILITY CPORTABILITY EXTRA_CFLAGS EXTRA_OPTIMIZE EXTRA_COPTIMIZE EXTRA_PORTABILITY
             EXTRA_CPORTABILITY <source>
Linkage: FLD(or FC) LDFLAGS LDFFLAGS EXTRA_LDFLAGS PASSn_LDFLAGS PASSn_FLAGS PASSn_LDFFLAGS OPTIMIZE FOPTIMIZE PASSn_OPTIMIZE
         PASSn_FOPTIMIZE LDOPTIMIZE PORTABILITY FPORTABILITY LDPORTABILITY EXTRA_OPTIMIZE EXTRA_FOPTIMIZE <objects> LIBS OS_LIBS
         MATH_LIBS OPTIMIZATION_LIBS OPTIMIZATION_FLIBS PORTABILITY_LIBS PORTABILITY_FLIBS EXTRA_LIBS EXTRA_FLIBS LDOPTIONS
         PASSn_LDOPTIONS LDOUT LDOUT_OPTIONS LDOUT_EXTRA_OPTIONS

Mixed C++, C, and Fortran:
Compilation: CXX CXXOBJOPT <object> -DSPEC -DNDEBUG BENCH_FLAGS BENCH_CXXFLAGS PASSn_FLAGS PASSn_CXXFLAGS OPTIMIZE CXXOPTIMIZE
             PASSn_OPTIMIZE PASSn_CXXOPTIMIZE PORTABILITY CXXPORTABILITY EXTRA_CXXFLAGS EXTRA_OPTIMIZE EXTRA_CXXOPTIMIZE
             EXTRA_PORTABILITY EXTRA_CXXPORTABILITY <source>
Compilation: CC COBJOPT <object> -DSPEC -DNDEBUG BENCH_FLAGS BENCH_CFLAGS PASSn_FLAGS PASSn_CFLAGS OPTIMIZE COPTIMIZE
             PASSn_OPTIMIZE PASSn_COPTIMIZE PORTABILITY CPORTABILITY EXTRA_CFLAGS EXTRA_OPTIMIZE EXTRA_COPTIMIZE EXTRA_PORTABILITY
             EXTRA_CPORTABILITY <source>
Compilation: FC FOBJOPT <object> BENCH_FLAGS BENCH_FFLAGS PASSn_FLAGS PASSn_FFLAGS OPTIMIZE FOPTIMIZE PASSn_OPTIMIZE
             PASSn_FOPTIMIZE PORTABILITY FPORTABILITY EXTRA_FFLAGS EXTRA_OPTIMIZE EXTRA_FOPTIMIZE EXTRA_PORTABILITY
             EXTRA_FPORTABILITY <source>
Linkage: CXXLD(or CXX) LDFLAGS LDCXXFLAGS EXTRA_LDFLAGS PASSn_LDFLAGS PASSn_FLAGS PASSn_LDCXXFLAGS OPTIMIZE CXXOPTIMIZE
         PASSn_OPTIMIZE PASSn_CXXOPTIMIZE LDOPTIMIZE PORTABILITY CXXPORTABILITY LDPORTABILITY EXTRA_OPTIMIZE EXTRA_CXXOPTIMIZE
         <objects> LIBS OS_LIBS MATH_LIBS OPTIMIZATION_LIBS OPTIMIZATION_CXXLIBS PORTABILITY_LIBS PORTABILITY_CXXLIBS EXTRA_LIBS
         EXTRA_CXXLIBS LDOPTIONS PASSn_LDOPTIONS LDOUT LDOUT_OPTIONS LDOUT_EXTRA_OPTIONS

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