O Options

• o
  Specifies the name for an output file.
• O
  Specifies the code optimization for applications.
• inline-level, Ob
  Specifies the level of inline function expansion.
• object
  Specifies the name for an object file.
• Od
  Disables all optimizations.
• onetrip, Qonetrip
  Tells the compiler to follow the FORTRAN 66 Standard and execute DO loops at least once.This is a deprecated option.
• Op
  This is a deprecated, alternate option for option fltconsistency.
• openmp, Qopenmp
  Enables the parallelizer to generate multi-threaded code based on the OpenMP* directives.
• openmp-lib, Qopenmp-lib
  Lets you specify an OpenMP* run-time library to use for linking.
• openmp-link, Qopenmp-link
  Controls whether the compiler links to static or dynamic OpenMP run-time libraries. This is a deprecated option.
• openmp-profile, Qopenmp-profile
  Enables analysis of OpenMP* applications if Intel® Thread Profiler is installed. This is a deprecated option.
• openmp-report, Qopenmp-report
  Controls the OpenMP* parallelizer's level of diagnostic messages.
• openmp-stubs, Qopenmp-stubs
  Enables compilation of OpenMP programs in sequential mode.
• openmp-threadprivate, Qopenmp-threadprivate
  Lets you specify an OpenMP* threadprivate implementation.
• opt-args-in-regs, Qopt-args-in-regs
  Determines whether calls to routines are optimized by passing arguments in registers instead of on the stack.
• opt-block-factor, Qopt-block-factor
  Lets you specify a loop blocking factor.
• opt-jump-tables, Qopt-jump-tables
  Enables or disables generation of jump tables for switch statements.
• opt-malloc-options
  Lets you specify an alternate algorithm for malloc().
• opt-matmul, Qopt-matmul
  Enables or disables a compiler-generated Matrix Multiply (matmul) library call.
• opt-multi-version-aggressive, Qopt-multi-version-aggressive
  Tells the compiler to use aggressive multi-versioning to check for pointer aliasing and scalar replacement.
• opt-prefetch, Qopt-prefetch
  Enables or disables prefetch insertion optimization.
• opt-ra-region-strategy, Qopt-ra-region-strategy
  Selects the method that the register allocator uses to partition each routine into regions.
• opt-report, Qopt-report
  Tells the compiler to generate an optimization report to stderr.
• opt-report-file, Qopt-report-file
  Specifies the name for an optimization report.
• opt-report-help, Qopt-report-help
  Displays the optimizer phases available for report generation.
• opt-report-phase, Qopt-report-phase
  Specifies an optimizer phase to use when optimization reports are generated.
• opt-report-routine, Qopt-report-routine
  Tells the compiler to generate reports on the routines containing specified text.
• opt-streaming-stores, Qopt-streaming-stores
  Enables generation of streaming stores for optimization.
• opt-subscript-in-range, Qopt-subscript-in-range
  Determines whether the compiler assumes that there are no "large" integers being used or being computed inside loops.
• optimize
  This is a deprecated option.
• Os
  Enables optimizations that do not increase code size and produces smaller code size than O2.
• Ot
  Enables all speed optimizations.
• Ox
  This is an alternate option name for option O2.
• fomit-frame-pointer, Oy
  Determines whether EBP is used as a general-purpose register in optimizations.

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