Compiler optimization level

Control compiler optimizations for building generated code, using flexible, generalized controls.

Note

This parameter only appears when the model is configured to use a template makefile-based code generation target, as described in Choose Build Approach and Configure Build Process.

Category: Code Generation

Default: Optimizations off (faster builds)

Optimizations off (faster builds): Customizes compilation during the build process to minimize compilation time.
Optimizations on (faster runs): Customizes compilation during the makefile build process to minimize run time.
Custom: Allows you to specify custom compiler optimization flags to be applied during the makefile build process.

Target-independent values Optimizations on (faster runs) and Optimizations off (faster builds) allow you to easily toggle compiler optimizations on and off during code development.
Custom allows you to enter custom compiler optimization flags at Simulink^® GUI level, rather than editing compiler flags into template makefiles (TMFs) or supplying compiler flags to make commands.
If you specify compiler options for your makefile build using OPT_OPTS, MEX_OPTS (except MEX_OPTS="-v"), or MEX_OPT_FILE, the value of Compiler optimization level is ignored and a warning is issued about the ignored parameter.

This parameter enables Custom compiler optimization flags.

Parameter: RTWCompilerOptimization

Type: character vector

Value: 'off' | 'on' | 'custom'

Default: 'off'

Application	Setting
Debugging	`Optimizations off (faster builds)`
Traceability	`Optimizations off (faster builds)`
Efficiency	`Optimizations on (faster runs)` (execution), No impact (ROM, RAM)
Safety precaution	No impact