20.3.2 Compiler Settings Macro
The following symbols are defined if compiler features are enabled.
| Symbol | Description |
|---|---|
__OPTIMIZATION_LEVEL__ |
Set to the value of the big O number. For example,
both -Os and -O2 would be set to
2. |
__OPTIMIZE_SIZE__ |
Defined if -Os enabled, undefined otherwise. |
__LARGE_ARRAYS__ |
Set to 1 for -menable-large-arrays,
set to 0 otherwise. |