Optimization Options

This section contains descriptions for compiler options that pertain to optimization.

• falias, Oa
  Determines whether aliasing is assumed in a program.
• fast
  Maximizes speed across the entire program.
• fbuiltin, Oi
  Enables or disables inline expansion of intrinsic functions.
• fdefer-pop
  Determines whether the compiler always pops the arguments to each function call as soon as that function returns.
• ffnalias, Ow
  Determines whether aliasing is assumed within functions.
• foptimize-sibling-calls
  Determines whether the compiler optimizes tail recursive calls.
• fprotect-parens, Qprotect-parens
  Determines whether the optimizer honors parentheses when floating-point expressions are evaluated.
• GF
  Enables read-only string-pooling optimization.
• nolib-inline
  Disables inline expansion of standard library or intrinsic functions.
• O
  Specifies the code optimization for applications.
• Od
  Disables all optimizations.
• Ofast
  Sets certain aggressive options to improve the speed of your application.
• Os
  Enables optimizations that do not increase code size; it produces smaller code size than O2.
• Ot
  Enables all speed optimizations.
• Ox
  Enables maximum optimizations.