Control Compiler Optimizations - MATLAB & Simulink (original) (raw)

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To control compiler optimizations for a makefile build at the GUI level, use the Compiler optimization level parameter. TheCompiler optimization level parameter provides

• Target-independent values Optimizations on (faster runs) andOptimizations off (faster builds), which allow you to easily toggle compiler optimizations on and off during code development
• The value Custom for entering custom compiler optimization flags at the Simulink® GUI level, rather than editing compiler flags into template makefiles (TMFs) or supplying compiler flags to build process make commands

The default setting is Optimizations off (faster builds). Selecting the valueCustom enables the Custom compiler optimization flags field, in which you can enter custom compiler optimization flags (for example,-O2).

If you specify compiler options for your makefile build usingOPT_OPTS, MEX_OPTS (exceptMEX_OPTS="-v"), orMEX_OPT_FILE, the value of Compiler optimization level is ignored and a warning is issued about the ignored parameter.

For a rapid simulation that uses the MinGW® compiler:

• If [RTWCompilerOptimization](../../rtw/ref/compileroptimizationlevel.html) is set to 'on', the build process customizes compiler optimization to minimize run time. The build process ignores the [BuildConfiguration](../../rtw/ref/buildconfiguration.html) and[CustomToolchainOptions](../../rtw/ref/toolchaindetails.html) settings.
• If RTWCompilerOptimization is set to 'custom' or'off', the build process usesBuildConfiguration andCustomToolchainOptions settings. The build process ignores theRTWCompilerOptimization setting.

See Also

Topics

• Template Makefiles and Make Options
• Configure a System Target File
• Support Compiler Optimization Level Control