Option |
Description |
Default |
|
-0f_check
IA-32 compiler |
Enables a software patch for Pentium processor 0f
erratum.
|
OFF |
|
-1 |
Executes any DO loop at least once. Same as
-onetrip.
|
OFF |
|
-72, -80, -132 |
Specifies 72, 80 or 132 column lines for fixed form source only. The
compiler might issue a warning for non-numeric text beyond 72 for the
-72 option.
|
-72 |
|
-A- |
Removes all predefined macros. Issues a warning if OpenMP does not work
correctly.
|
OFF |
|
-align |
Analyzes and reorders memory layout for variables and arrays. (Same
as -Zp{n}.)
To disable, use the -noalign option (default
is OFF) |
ON |
|
-ansi[-] |
Enables (default) or disables assumption of the programs ANSI conformance.
|
ON |
|
-auto |
Causes all variables to be allocated on the stack, rather than in local
static storage. Does not affect variables that appear in an EQUIVALENCE
or SAVE statement, or those that are in COMMON.
Makes all local variables AUTOMATIC.
|
OFF |
|
-autodouble |
Sets the default size of real numbers to 8 bytes; same as -r8.
|
OFF |
|
-auto_scalar |
Makes scalar local variables AUTOMATIC.
|
ON |
|
-ax{i|M|K|W}
IA-32 compiler |
Generates code that is optimized for a specific processor, but that
will execute
on any IA-32 processor. Compiler generates multiple versions of some routines,
and chooses the best version for the host processor at runtime indicated
by processor-specific codes i (Pentium® Pro),
M (Pentium with MMX(TM) technology), K
(Pentium III), and W (Pentium 4 and Xeon(TM)).
|
OFF |
|
-bd,progname |
Enables the Intel® Fortran Compiler binder to generate a list of objects
to build a PROGNAME.
|
OFF |
|
-c |
Stops the compilation process after an object file (.o)
has been generated.
|
OFF |
|
-C90 |
Links with an alternative I/O library (libCEPCF90.a)
that supports mixed input and output with C on the standard streams.
|
OFF |
|
-C
IA-32 compiler |
Equivalent to: (-CA, -CB,
-CS, -CU, -CV)
extensive runtime diagnostics options.
|
OFF |
|
-CA
IA-32 compiler |
Generates runtime code, which checks pointers and allocatable array
references for nil. Should be used in conjunction with -d{n}.
|
OFF |
|
-CB
IA-32 compiler |
Generates runtime code to check that array subscript and substring references
are within declared bounds. Should be used in conjunction with -d{n}.
|
OFF |
|
-CS
IA-32 compiler |
Generates runtime code that checks for consistent shape of intrinsic
procedure. Should be used in conjunction with -d{n}.
|
OFF |
|
-CU
IA-32 compiler |
Generates runtime code that causes a runtime error if variables are
used without being initialized. Should be used in conjunction with -d{n}.
|
OFF |
|
-CV
IA-32 compiler |
On entry to a subprogram, tests the correspondence between the actual
arguments passed and the dummy arguments expected. Both calling and called
code must be compiled with -CV for the checks
to be effective. Should be used in conjunction with -d{n}.
|
OFF |
|
-cerrs[-] |
Enables/disables errors and warning messages to be printed in a terse
format for diagnostic messages.
|
OFF |
|
-cl,file |
Specifies a program unit catalog list file in which to search for referenced
modules.
|
OFF |
|
-cm |
Suppresses all comment messages.
|
OFF |
|
-common_args |
Assumes by reference subprogram arguments may alias one another.
|
OFF |
|
-cpp{n} |
Same as -fpp{n}.
|
OFF |
|
-DD |
Compiles debugging statements indicated by the letter D
in column 1 of the source code.
|
OFF |
|
-DX |
Compiles debugging statements indicated by the letters X
in column 1 of the source code.
|
OFF |
|
-DY |
Compiles debugging statements indicated by the letters Y
in column 1 of the source code.
|
OFF |
|
-d{n}
IA-32 compiler |
Sets diagnostics level as follows:
-d0 - displays procname line
-d1 - displays local scalar variables
-d2 - local and common scalars
-d>2 - display first n elements of local and COMMON
arrays, and all scalars.
|
OFF |
|
-Dname[={#|text}] |
Defines a macro name and associates it with the specified value.
|
OFF |
|
-doubletemps |
Ensures that all intermediate results of floating-point expressions
are maintained in at least double precision.
|
OFF |
|
-dps, -nodps |
Enable (default) or disable DEC* parameter statement recognition.
|
-dps |
|
-dryrun |
Show driver tool commands but do not execute tools.
|
OFF |
|
-E |
Preprocesses the source files and writes the results to _stdout.
If the file name ends with capital F, the option
is treated as
-fpp{n}.
|
OFF |
|
-e90, -e95 |
Enables/disables issuing of errors rather than warnings for features
that are non-standard Fortran.
|
OFF |
|
-EP |
Preprocesses the source files and writes the results to stdout omitting
the #line directives.
|
OFF |
|
-extend_source |
Enables extended (132-character) source lines. Same as -132.
|
OFF |
|
-F |
Preprocesses the source files and writes the results to file.
|
OFF |
|
-falias |
Enables aliasing in program.
|
ON |
|
-fno-alias |
Disables aliasing in program.
|
OFF |
|
-ffnalias |
Enables aliasing across functions.
|
ON |
|
-fno-fnalias |
Disables aliasing across functions, but enables aliasing across calls.
|
OFF |
|
-fcode_asm |
Produces assembly file with optional code byte annotations.
|
OFF |
|
-fsource_asm |
Produces assembly file with optional high-level source code annotations.
|
OFF |
|
-fverbose-asm |
Produces assembly file with compiler comments including compiler version
and options.
|
ON |
|
-fnoverbose-asm |
Produces assembly file without compiler comments.
|
OFF |
|
-FI |
Specifies that the source code is in fixed format. This is the default
for source files with the file extensions .for,
.f, or .ftn.
|
OFF |
|
-fp
IA-32 compiler |
Disables the use of the ebp register in optimizations.
|
OFF |
|
-fpp{n} |
Runs the Fortran preprocessor (fpp) on all Fortran
source files (.f, .ftn,
.for, and .f90 files)
prior to compilation.
n=0: disable CVF and #directives n=1: enable
CVF conditional compilation and # directives (default)
n=2: enable only # directives,
n=3: enable only CVF conditional compilation directives.
|
-fpp1 |
|
-fp_port
IA-32 compiler |
Rounds floating-point results at assignments and casts. Some speed impact.
|
OFF |
|
-FR |
Specifies that the source code is in Fortran free format. This is the
default for source files with the .f90 file extensions.
|
OFF |
|
-ftz
Itanium compiler |
Flushes denormal results to zero.
|
OFF |
|
-g |
Generates symbolic debugging information and line numbers in the object
code for use by source-level debuggers.
|
OFF |
|
-G0 |
Prints source listing to stdout (typically your terminal screen) with
the contents of expanded INCLUDE files.
|
OFF |
|
-G1 |
Prints a source listing to stdout, without contents of expanded INCLUDE files.
|
OFF |
|
-help |
Prints
help message.
|
OFF |
|
-i{2|4|8} |
Defines the default KIND for integer variables
and constants in 2, 4, and 8 bytes.
|
-i4 |
|
-ic |
Runs independent Fortran compilation without accessing and updating
Fortran compilation environment (FCE).
|
OFF |
|
-Idir |
Specifies an additional directory to search for include files whose
names do not begin with a slash (/).
|
OFF |
|
-i_dynamic |
Enables to link Intel-provided libraries dynamically.
|
OFF |
|
-implicitnone |
Enables the IMPLICIT NONE.
|
OFF |
|
-inline_debug_info |
Keep the source position of inlined code instead of assigning the call-site
source position to inlined code.
|
OFF |
|
-ip |
Enables single-file interprocedural optimizations.
|
OFF |
|
-ip_no_inlining |
Disables full or partial inlining that would result from the -ip
interprocedural optimizations. Requires -ip or
-ipo.
|
ON |
|
-ip_no_pinlining
IA-32 compiler |
Disables partial inlining. Requires -ip or -ipo.
|
OFF |
|
-IPF_fma[-]
Itanium compiler |
Enables/disables the contraction of floating-point multiply
and add/ subtract operations into a single operation.
|
ON |
|
-IPF_fp_speculationmode
Itanium compiler |
Sets the compiler to speculate on fp operations in one
of the following modes:
fast: speculate on fp operations;
safe: speculate on fp operations only when it is safe;
strict: enables the compiler's speculation on floating-point operations
preserving floating-point status in all situations; same as
off
in the current version.
off: disables the fp speculation.
|
-IPF_fp_
speculation
fast |
|
-IPF_flt_eval_method0
Itanium compiler |
-IPF_flt_eval_method0 directs the compiler to
evaluate the expressions involving floating-point operands in the precision
indicated by the program.
|
OFF |
|
-IPF_fltacc[-]
Itanium compiler |
Enables/disables the compiler to apply optimizations that affect floating-point
accuracy. By default, the compiler may apply optimizations that affect
floating-point accuracy. -IPF_fltacc- disables
such optimizations. -IPF_fltacc- is effective
when -mp is on.
|
ON |
|
-ipo |
Enables interprocedural optimization across files. Compile all objects
over entire program with multifile interprocedural optimizations.
|
OFF |
|
-ipo_c |
Optimizes across files and produces a multifile object file. This option
performs optimizations as
-ipo, but stops prior to the final link stage, leaving an optimized
object file.
|
OFF |
|
-ipo_obj |
Forces the generation of real object files. Requires
-ipo.
|
IA-32: OFF Itanium Compiler: ON |
|
-ipo_S |
Optimizes across files and produces a multifile assembly file. This
option performs optimizations as
-ipo, but stops prior to the final link stage, leaving an optimized
assembly file.
|
OFF |
|
-ivdep_parallel
Itanium compiler |
Indicates there is absolutely no loop-carried memory dependency in the
loop where IVDEP directive is specified.
|
OFF |
|
-Kpic, -KPIC |
Generates position-independent code.
|
OFF |
|
-Ldir |
Instructs linker to search dir
for libraries.
|
OFF |
|
-lname |
Links with a library indicated in name.
|
OFF |
|
-lowercase |
Controls the case of routine names and external linker symbols to all
lowercase characters.
|
ON |
|
-Map |
Instructs the linker to produce a map file.
|
OFF |
|
-mp |
Maintains declared floating point precision as
well as conformance to the IEEE 754 standards for floating-point arithmetic.
Optimization is reduced accordingly. Behavior for NaN comparisons does
not conform.
|
OFF |
|
-mp1 |
Restricts floating point precision to be closer to declared precision.
Some speed impact, but less than -mp.
|
OFF |
|
-nbs |
Treats backslash (\) as a normal graphic character, not an escape character.
|
OFF |
|
-nobss_init |
Disables placement of zero-initialized variables in BSS (using DATA
section)
|
OFF |
|
-nolib_inline |
Disables inline expansion of intrinsic functions.
|
ON |
|
-nologo |
Suppresses compiler version information.
|
ON |
|
-nus |
Disables appending an underscore to external subroutine names.
|
OFF |
|
-nusfile |
Disables appending an underscore to subroutine names listed
in file.
|
OFF |
|
-O, -O1, -O2
IA-32 compiler |
Optimize for speed. but disable some optimizations that increase code
size for a small speed benefit. Disable option -fp.
Generally, -O2 is recommended over -O1.
|
OFF |
|
-O, -O1
Itanium compiler |
Optimize to favor code size. Enable the same optimizations as -O2 except for loop unrolling.
-O1 turns off software pipelining to reduce code
size.
|
OFF |
|
-O2 |
Optimizes for speed, but disables some optimizations that increase code
size for a small speed benefit. Default.
|
ON |
|
-O0 |
Disables optimizations.
|
OFF |
|
-O3 |
Enables -O2 option with more aggressive optimization,
for example, loop transformation. Optimizes for maximum speed, but may
not improve performance for some programs.
|
OFF |
|
-ofile |
Indicates the executable file name in file
or directory; for example, -omyfile,
-omydir\.
Combined with -S, indicates assembly file or directory
for multiple assembly files.
Combined with -c, indicates object file name or
directory for multiple object files.
|
OFF |
|
-onetrip |
Executes any DO loop at least once. (Identical to the
-1 option.)
|
OFF |
|
-openmp |
Enables the parallelizer to generate multithreaded code based on the
OpenMP directives. This option implies that -fpp
is ON.
|
OFF |
|
-openmp_
report{0|1|2} |
Controls the OpenMP parallelizers diagnostic levels. |
-openmp
_report1 |
|
-opt_report
Itanium compiler only |
Generates optimizations report and directs to stderr
unless
-opt_report_file is specified.
|
OFF |
|
-opt_report_filefilename
Itanium compiler only |
Specifies the filename to
hold the optimizations report.
|
OFF |
|
-opt_
report_level{min|med|max}
Itanium compiler only |
Specifies the detail level of the optimizations report.
|
-opt_
report_
levelmin |
|
-opt_report_phasephase
Itanium compiler only |
Specifies the optimization to generate the report for. Can be specified
multiple times on the command line for multiple optimizations.
|
OFF |
|
-opt_report_help
Itanium compiler only |
Prints to the screen all available phases for -opt_report_phase.
|
OFF |
|
-opt_report_routine
routine_substring
Itanium compiler only |
Generates reports from all routines with names containing the substring as part of their name.
If not specified, reports from all routines are generated.
|
OFF |
|
-P |
Preprocesses the fpp files and writes the results to files named according
to the compilers default file-naming conventions.
|
OFF |
|
-pad, -nopad |
Enables/disables changing variable and array memory layout.
|
-nopad |
|
-pad_source |
Enforces the acknowledgment of blanks at the end of a line.
|
OFF |
|
-parallel |
Enables the auto-parallelizer to generate multithreaded code for loops
that can be safely executed in parallel.
|
OFF |
|
-par_threshold |
Sets a threshold for the auto-parallelization of loops based on the
probability of profitable execution of the loop in parallel, n=0
to 100.
|
n=75 |
|
-par_report{0|1|2|3}
|
Controls the auto-parallelizer's diagnostic levels.
|
-par_
report1 |
|
-pc32
-pc64
-pc80
IA-32 compiler |
Enables floating-point significand precision control as follows:
-pc32 to 24-bit significand
-pc64 to 53-bit significand, and
-pc80 to 64-bit significand
|
-pc64 |
|
-posixlib |
Enables linking to the POSIX library (libPOSF90.a)
in the compilation.
|
OFF |
|
-prec_div
IA-32 compiler |
Improves precision of floating-point divides. Some speed impact.
|
OFF |
|
-prefetch[-]
IA-32 compiler |
Enables or disables prefetch insertion (requires -O3).
|
ON |
|
-prof_dirdir |
Specifies the directory to hold profile information in the profiling
output files, *.dyn and *dpi.
|
OFF |
|
-prof_gen |
Instruments the program for profiling: to get the execution count of
each basic block.
|
OFF |
|
-prof_filefile |
Specifies file name for profiling summary file.
|
OFF |
|
-prof_use |
Enables the use of profiling dynamic feedback information during optimization.
|
OFF |
|
-q |
Suppresses compiler output to standard error, __stderr.
|
OFF |
|
-Qdyncom"blk1,blk2,..." |
Enables dynamic allocation of given COMMON blocks
at run time.
|
OFF |
|
-Qinstalldir |
Sets dir as a root directory
for compiler installation.
|
OFF |
|
-Qlocation,tool,path |
Sets path as the location
of the tool specified by tool.
|
OFF |
|
-Qloccom
"blk1,blk2,..." |
Enables local allocation of given COMMON blocks
at run time.
|
OFF |
|
-Qoption,tool,opts |
Passes the options, opts, to
the tool specified by tool.
|
OFF |
|
-qp, -p |
Compile and link for function profiling with UNIX prof tool.
|
OFF |
|
-r{4|8|16} |
Defines the KIND for real variables
in 4 (default), 8, and 16 bytes.
-r8: change the size and precision of default REAL
entities to DOUBLE
PRECISION. Same as the
-autodouble.
-r16: change the size and precision
of default REAL
entities to REAL
(KIND=16)
|
-r4 |
|
-rcd
IA-32 compiler |
Enables efficient float-to-integer conversions.
|
OFF |
|
-S |
Produces an assembly output.
|
OFF |
|
-save |
Saves all variables (static allocation). Opposite of -auto.
|
ON |
|
-scalar_rep[-]
IA-32 compiler |
Enables or disables scalar replacement performed during loop transformations
(requires -O3).
|
OFF |
|
-sox[-]
IA-32 compiler |
Enables (default) or disables saving of compiler options and version
in the executable.
Itanium compiler: accepted for compatibility only.
|
IA-32: ON |
|
-shared |
Instructs the compiler to build a Dynamic Shared Object (DSO) instead
of an executable.
|
OFF |
|
-syntax |
Enables syntax check only. Same as -y.
|
OFF |
|
-Tffile |
Compiles file as a Fortran
source.
|
OFF |
|
-tpp{5|6|7}
IA-32 compiler |
-tpp5 optimizes for the Intel Pentium processor.
-tpp6 optimizes for the Intel Pentium Pro, Pentium II,
and Pentium III processors.
-tpp7 optimizes for the Intel Pentium 4 and Xeon(TM) processor;
requires the and support of Streaming SIMD Extensions 2.
|
-tpp6 |
|
-u |
Sets IMPLICIT NONE by default.
|
ON |
|
-Uname |
Removes a defined macro specified by name;
equivalent to an #undef preprocessing directive.
|
OFF |
|
-unroll[n] |
-Use n to set maximum number of times to unroll
a loop.
-Omit n to let the compiler decide whether to perform
unrolling or not.
-Use n = 0 to disable unroller.
The Itanium compiler currently uses only n = 0;
all other values are NOPs.
|
ON |
|
-uppercase |
Changes
routine names to all uppercase characters.
|
OFF |
|
-us |
Appends (default) an underscore to external subroutine names.
|
ON |
|
-use_asm |
Produces objects through the assembler.
|
OFF |
|
-use_msasm
IA-32 compiler |
Supports Microsoft* style assembly language insertion using MASM style
syntax, and if requested, outputs assembly in MASM format.
|
OFF |
|
-Vstring |
Displays compiler version information.
|
OFF |
|
-v |
Shows driver tool commands and executes tools.
|
OFF |
|
-Vaxlib |
Enables linking to portability library (libPEPCF90.a)
in the compilation.
|
OFF |
|
-vec-
IA-32 compiler |
Turn off the vectorizer.
|
OFF |
|
-vec
_report{0|1|2|3|4|5}
IA-32 compiler |
Controls amount of vectorizer diagnostic information as follows:
n = 0: no information
n = 1: indicate vectorized /non-vectorizerd integer loops
n = 2: indicate vectorized /non-vectorized integer loops
n = 3: indicate vectorized /non-vectorized integer loops and prohibit
data dependence information
n = 4: indicate non-vectorized loops
n = 5: indicate non-vectorized loops and prohibit data dependence
information
|
-vec
_report1 |
|
-vms |
Enables support for extensions to Fortran that were introduced by Digital
VMS and Compaq Fortran compilers.
|
OFF |
|
-w |
Suppresses all warning messages.
|
OFF |
|
-w{n} |
Suppresses or displays all warning messages.
n=0: suppresses all warnings
n=1: displays all warnings (default).
|
-w1 |
|
-WB |
Issues a warning about out-of-bounds array references at compile time.
|
OFF |
|
-wp_ipo |
A whole program assertion flag for multifile optimization with the assumption
that all user variables and user functions seen in the compiled sources
are referenced only within those sources. The user must guarantee that
this assumption is safe.
|
OFF |
|
-x{i|M|K|W}
IA-32 compiler |
Generates processor-specific code corresponding to one of codes: i, M, K,
and W while also generating generic IA-32 code.
This differs from -ax{n} in that this targets
a specific processor. With this option, the resulting program may not
run on processors older than the target specified.
|
OFF |
|
-X |
Removes standard directories from the include file search.
|
OFF |
|
-y |
Enables syntax check only.
|
OFF |
|
-zero |
Implicitly initializes to zero all data that is uninitialized. Used
in conjunction with -save.
|
OFF |
|
-Zp{1|2|4|8|16} |
Specifies alignment constraint for structures on 1-, 2-, 4-, 8- or 16-byte
boundary.
|
IA-32:
-Zp4
Itanium Compiler: -Zp8 |