Parameter Reference :: Configuration Parameters for Simulink Models (Simulink® Coder™)

Parameter Reference

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Recommended Settings Summary Parameter Command-Line Information Summary

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Parameter Command-Line Information Summary

Recommended Settings Summary

The following table summarizes the impact of each configuration parameter on debugging, traceability, efficiency, and safety considerations, and indicates the factory default configuration settings for the GRT and ERT targets, unless otherwise specified.

For parameters that are available only when an ERT target is specified, see the Recommended Settings Summary in the Embedded Coder documentation.

For additional details, click the links in the Configuration Parameter column.

Mapping Application Requirements to the Solver Pane

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Start Time	No impact	No impact	No impact	0.0	0.0 seconds
Stop time	No impact	No impact	No impact	Any positive value	10.0 seconds
Type	`Fixed-step`	`Fixed-step`	`Fixed-step`	`Fixed-step`	`Variable-step` (you must change to `Fixed-step` for code generation)
Solver	No impact	No impact	No impact	`Discrete (no continuous states)`	`ode3 (Bogacki-Shampine)`
Periodic sample time constraint	No impact	No impact	No impact	`Specified` or `Ensure sample time independent`	`Unconstrained`
Sample time properties	No impact	No impact	No impact	Period, offset, and priority of each sample time in the model; faster sample times must have higher priority than slower sample times	`''`
Tasking mode for periodic sample times	No impact	No impact	No impact	No impact	Auto
Automatically handle rate transition for data transfer	No impact	No impact (for simulation and during development) Off (for production code generation)	No impact	Off	Off

Mapping Application Requirements to the Data Import/Export Pane

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Input	No impact	No impact	No impact	No impact (GRT) Off (ERT)	Off
Initial state	No impact	No impact	No impact	No impact (GRT) Off (ERT)	Off
Time	No impact	No impact	No impact	No impact (GRT) Off (ERT)	On
States	No impact	No impact	No impact	No impact (GRT) Off (ERT)	Off
Output	No impact	No impact	No impact	No impact (GRT) Off (ERT)	On
Final states	No impact	No impact	No impact	No impact (GRT) Off (ERT)	Off
Signal logging	No impact	No impact	No impact	No impact (GRT) Off (ERT)	On
Record and inspect simulation output	No impact	No impact	No impact	No impact (GRT) Off (ERT)	Off
Limit data points to last	No impact	No impact	No impact	No impact (GRT) Off (ERT)	On
Decimation	No impact	No impact	No impact	No impact (GRT) Off (ERT)	1
Format	No impact	No impact	No impact	No impact (GRT) Off (ERT)	`Array`
Output options	No impact	No impact	No impact	No impact (GRT) Off (ERT)	`Refine output`
Refine factor	No impact	No impact	No impact	No impact (GRT) Off (ERT)	1
Output times	No impact	No impact	No impact	No impact (GRT) Off (ERT)	`'[]'`

Mapping Application Requirements to the Optimization Pane: General Tab

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Block reduction	Off (GRT) No impact (ERT)	Off	On	Off	On
Implement logic signals as Boolean data (vs. double)	No impact	No impact	On	On	On
Conditional input branch execution	No impact	On	On (execution) No impact (ROM, RAM)	Off	On
Application lifespan (days)	No impact	No impact	Finite value	`inf`	`inf`
Use memset to initialize floats and doubles to 0.0	No impact	No impact	On* (execution, ROM) No impact (RAM)	No impact	On
Use floating-point multiplication to handle net slope corrections	No impact	No impact	On (when target hardware supports efficient multiplication) Off (otherwise)	Off	Off
Remove code from floating-point to integer conversions that wraps out-of-range values	Off	Off	On (execution, ROM) No impact (RAM)	Off (GRT) On (ERT)	Off
Remove code from floating-point to integer conversions with saturation that maps NaN to zero	Off	Off	On	Off (GRT) On (ERT)	On
*The command-line value is reverse of the listed value.

Mapping Application Requirements to the Optimization Pane: Signals and Parameters Tab

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Inline parameters	Off (GRT) On (ERT)	On	On	No impact	Off
Signal storage reuse	Off	Off	On	No impact	On
Enable local block outputs	Off	No impact	On	No impact	On
Eliminate superfluous local variables (Expression folding)	Off	No impact (GRT) Off (ERT)	On	No impact	On
Minimize data copies between local and global variables	Off	Off	No impact (execution) On (ROM, RAM)	No impact	Off
Loop unrolling threshold	No impact	No impact	>0	>1	5
Maximum stack size (bytes)	No impact	No impact	No impact	No impact	`Inherit from target`
Use memcpy for vector assignment	No impact	No impact	On	No impact	On
Memcpy threshold (bytes)	No impact	No impact	Accept default or determine target-specific optimal value	No impact	64
Reuse block outputs	Off	Off	On	No impact	On
Inline invariant signals	Off	Off	On	No impact	Off

Mapping Application Requirements to the Optimization Pane: Stateflow Tab

Configuration Parameter	Settings for Building Code	Factory Default
Use bitsets for storing state configuration	Off	Off	Off (execution, ROM) On (RAM)	No impact	Off
Use bitsets for storing Boolean data	Off	Off	Off (execution, ROM) On (RAM)	No impact	Off

Configuration Parameter

Settings for Building Code

Factory Default

Debugging

Traceability

Efficiency

Safety Precaution

Use bitsets for storing state configuration

Off

Off (execution, ROM)

On (RAM)

No impact

Off

Use bitsets for storing Boolean data

Off

Off (execution, ROM)

On (RAM)

No impact

Off

Mapping Application Requirements to the Diagnostics Pane: Solver Tab

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Algebraic loop	`error`	No impact	No impact	`error`	`warning`
Minimize algebraic loop	No impact	No impact	No impact	`error`	`warning`
Block priority violation	No impact	No impact	No impact	`error`	`warning`
Consecutive zero-crossings violation	No impact	No impact	No impact	`warning` or `error`	`error`
Unspecified inheritability of sample time	No impact	No impact	No impact	`error`	`warning`
Solver data inconsistency	`warning`	No impact	`none`	No impact	`warning`
Automatic solver parameter selection	No impact	No impact	No impact	`error`	`warning`

Mapping Application Requirements to the Diagnostics Pane: Sample Time Tab

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Source block specifies -1 sample time	No impact	No impact	No impact	`error`	`none`
Discrete used as continuous	No impact	No impact	No impact	`error`	`warning`
Multitask rate transition	No impact	No impact	No impact	`error`	`error`
Single task rate transition	No impact	No impact	No impact	`none` or `error`	`none`
Multitask conditionally executed subsystem	No impact	No impact	No impact	`error`	`error`
Tasks with equal priority	No impact	No impact	No impact	`none` or `error`	`warning`
Enforce sample times specified by Signal Specification blocks	No impact	No impact	No impact	`error`	`warning`

Mapping Application Requirements to the Diagnostics Pane: Data Validity Tab

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Signal resolution	No impact	No impact	No impact	`Explicit only`	`Explicit only`
Division by singular matrix	No impact	No impact	No impact	`error`	`none`
Underspecified data types	No impact	No impact	No impact	`error`	`none`
Simulation range checking	`warning` or `error`	`warning` or `error`	`none`	`error`	`none`
Detect overflow	No impact	No impact	No impact	`error`	`warning`
Inf or NaN block output	No impact	No impact	No impact	`error`	`none`
"rt" prefix for identifiers	No impact	No impact	No impact	`error`	`error`
Detect downcast	No impact	No impact	No impact	`error`	`error`
Detect overflow	No impact	No impact	No impact	`error`	`error`
Detect underflow	No impact	No impact	No impact	`error`	`none`
Detect precision loss	No impact	No impact	No impact	`error`	`error`
Detect loss of tunability	No impact	No impact	No impact	`error`	`none`
Detect read before write	No impact	No impact	No impact	`error`	`Enable all as warnings`
Detect write after read	No impact	No impact	No impact	`error`	`Enable all as warning`
Detect write after write	No impact	No impact	No impact	`error`	`Enable all as errors`
Multitask data store	No impact	No impact	No impact	`error`	`warning`
Duplicate data store names	`warning`	No impact	`none`	No impact	`none`
Check undefined subsystem initial output	No impact	No impact	No impact	On	On
Check preactivation output of execution context	No impact	No impact	No impact	On	Off
Check runtime output of execution context	No impact	No impact	No impact	On	Off
Model Verification block enabling	No impact	No impact	No impact	No impact (GRT) `Disable all` (ERT)	`Use local settings`

Mapping Application Requirements to the Diagnostics Pane: Type Conversion Tab

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Unnecessary type conversions	No impact	No impact	No impact	`warning`	`none`
Vector/matrix block input conversion	No impact	No impact	No impact	`error`	`none`
32-bit integer to single precision float conversion	No impact	No impact	No impact	`warning`	`warning`

Mapping Application Requirements to the Diagnostics Pane: Connectivity Tab

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Signal label mismatch	No impact	No impact	No impact	`error`	`none`
Unconnected block input ports	No impact	No impact	No impact	`error`	`warning`
Unconnected block output ports	No impact	No impact	No impact	`error`	`warning`
Unconnected line	No impact	No impact	No impact	`error`	`none`
Unspecified bus object at root Outport block	No impact	No impact	No impact	`error`	`warning`
Element name mismatch	No impact	No impact	No impact	`error`	`warning`
Mux blocks used to create bus signals	No impact	No impact	No impact	`error`	`warning`
Bus signal treated as vector	No impact	No impact	No impact	`error`	`warning`
Invalid function-call connection	No impact	No impact	No impact	`error`	`error`
Context-dependent inputs	No impact	No impact	No impact	`Enable all`	`Use local settings`

Mapping Application Requirements to the Diagnostics Pane: Compatibility Tab

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
S-function upgrades needed	No impact	No impact	No impact	`error`	`none`

Mapping Application Requirements to the Diagnostics Pane: Model Referencing Tab

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Model block version mismatch	No impact	No impact	No impact	`none`	`none`
Port and parameter mismatch	No impact	No impact	No impact	`error`	`none`
Model configuration mismatch	No impact	No impact	No impact	`warning`	`none`
Invalid root Inport/Outport block connection	No impact	No impact	No impact	`error`	`none`
Unsupported data logging	No impact	No impact	No impact	`error`	`warning`

Mapping Application Requirements to the Diagnostics Pane: Saving Tab

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Block diagram contains disabled library links	No impact	No impact	No impact	No impact	`warning`
Block diagram contains parameterized library links	No impact	No impact	No impact	No impact	`none`

Mapping Application Requirements to the Diagnostics Pane: Stateflow Tab

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Unused data and events	`warning`	No impact	No impact (for simulation and during development) `none` (for production code generation)	`warning`	`warning`
Unexpected backtracking	`warning`	No impact	No impact	`error`	`warning`
Invalid input data access in chart initialization	`warning`	No impact	No impact	`error`	`warning`
No unconditional default transitions	`warning`	No impact	No impact (for simulation and during development) `none` (for production code generation)	`error`	`warning`
Transition outside natural parent	`warning`	No impact	No impact (for simulation and during development) `none` (for production code generation)	`error`	`warning`

Mapping Application Requirements to the Hardware Implementation Pane

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Device vendor	No impact	No impact	No impact	No impact	`Generic`
Device type	No impact	No impact	No impact	No impact	`Unspecified (assume 32–bit Generic)`
Number of bits	No impact	No impact	Target specific	No impact for simulation and during development Match operation of compiler and hardware for code generation	`char` 8, `short` 16, `int` 32, `long` 32, `native` 32
Largest atomic size	No impact	No impact	Target specific	No impact for simulation and during development Match operation of compiler and hardware for code generation	integer `Char`, floating-point `None`
Byte ordering	No impact	No impact	No impact	No impact	`Unspecified`
Signed integer division rounds to	No impact for simulation and during development `Undefined` for production code generation	No impact for simulation and during development `Zero` or `Floor` for production code generation	No impact for simulation and during development `Zero` for production code generation	No impact for simulation and during development `Floor` for production code generation	`Undefined`
Shift right on a signed integer as arithmetic shift	No impact	No impact	On	No impact	On
Emulation hardware (code generation only)	No impact	No impact	No impact	No impact	On

Mapping Application Requirements to the Model Referencing Pane

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Rebuild	No impact	No impact	No impact	`If any changes detected` or `Never` If you use the `Never` setting, then set the Never rebuild diagnostic parameter to `Error if rebuild required`	`If any changes detected`
Never rebuild diagnostic	No impact	No impact	No impact	`error if rebuild required`	`error if rebuild required`
Enable parallel model reference builds	No impact	No impact	No impact	No impact	Off
MATLAB worker initialization for builds	No impact	No impact	No impact	No impact	`None`
Total number of instances allowed per top model	No impact	No impact	No impact	No impact	`Multiple`
Pass fixed-size scalar root inputs by value for code generation	No impact	No impact	No impact	Off	Off
Minimize algebraic loop occurrences	No impact	No impact	No impact	Off	Off
Propagate sizes of variable-size signals	No impact	No impact	No impact	Off	`Infer from blocks in model`
Model dependencies	No impact	No impact	No impact	No impact	`''`

Mapping Application Requirements to the Simulation Target Pane: General Tab

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Enable debugging/animation	On	No impact	Off	On	On
Enable overflow detection (with debugging)	On	No impact	Off	On	On
Ensure memory integrity	On	On	Off	On	On
Echo expressions without semicolons	On	No impact	Off	No impact	On
Use BLAS library for faster simulation	No impact	No impact	On	No impact	On
Ensure responsiveness	On	On	Off	On	On
Simulation target build mode	No impact	No impact	No impact	No impact	`Incremental build`

Mapping Application Requirements to the Simulation Target Pane: Symbols Tab

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Reserved names	No impact	No impact	No impact	No impact	`{}`

Mapping Application Requirements to the Simulation Target Pane: Custom Code Tab

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Parse custom code symbols	On	No impact	No impact	On	On
Source file	No impact	No impact	No impact	No impact	`''`
Header file	No impact	No impact	No impact	No impact	`''`
Initialize function	No impact	No impact	No impact	No impact	`''`
Terminate function	No impact	No impact	No impact	No impact	`''`
Include directories	No impact	No impact	No impact	No impact	`''`
Source files	No impact	No impact	No impact	No impact	`''`
Libraries	No impact	No impact	No impact	No impact	`''`

Mapping Application Requirements to the Code Generation Pane: General Tab

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
System target file	No impact	No impact	No impact	No impact (GRT) ERT based (ERT)	`grt.tlc`
Language	No impact	No impact	No impact	No impact	C
Compiler optimization level	`Optimizations off (faster builds)`	`Optimizations off (faster builds)`	`Optimizations on (faster runs)` (execution) No impact (ROM, RAM)	No impact	`Optimizations off (faster builds)`
Custom compiler optimization flags	`Optimizations off (faster builds)`	`Optimizations off (faster builds)`	`Optimizations on (faster runs)`	No impact	`Optimizations off (faster builds)`
TLC options	No impact	No impact	No impact	No impact	`''`
Generate makefile	No impact	No impact	No impact	No impact	On
Make command	No impact	No impact	No impact	`make_rtw`	`make_rtw`
Template makefile	No impact	No impact	No impact	No impact	`grt_default_tmf`
Select objective	`Debugging`	Not applicable for GRT-based targets	`Execution efficiency`	Not applicable for GRT-based targets	`Unspecified`
Check model before generating code	`On (proceed with warnings)` or `On (stop for warnings)`	`On (proceed with warnings)` or `On (stop for warnings)`	`On (proceed with warnings)` or `On (stop for warnings)`	`On (proceed with warnings)` or `On (stop for warnings)`	`Off`
Generate code only	Off	No impact	No impact	No impact	Off

Mapping Application Requirements to the Code Generation Pane: Report Tab

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precautions	Factory Default
Create code generation report	On	On	No impact	On	Off
Open report automatically	On	On	No impact	No impact	Off

Mapping Application Requirements to the Code Generation Pane: Comments Tab

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Include comments	On	On	No impact	On	On
Simulink block / Stateflow object comments	On	On	No impact	On	On
Show eliminated blocks	On	On	No impact	On	Off
Verbose comments for Simulink Global storage class	On	On	No impact	On	Off

Mapping Application Requirements to the Code Generation Pane: Symbols Tab

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Maximum identifier length	Any valid value	>30	No impact	>30	31
Use the same reserved names as Simulation Target	No impact	No impact	No impact	No impact	Off
Reserved names	No impact	No impact	No impact	No impact	`{}`

Mapping Application Requirements to the Code Generation Pane: Custom Code Tab

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Use the same custom code settings as Simulation Target	No impact	No impact	No impact	No impact	Off
Source file	No impact	No impact	No impact	No impact	`''`
Header file	No impact	No impact	No impact	No impact	`''`
Initialize function	No impact	No impact	No impact	No impact	`''`
Terminate function	No impact	No impact	No impact	No impact	`''`
Include directories	No impact	No impact	No impact	No impact	`''`
Source files	No impact	No impact	No impact	No impact	`''`
Libraries	No impact	No impact	No impact	No impact	`''`

Mapping Application Requirements to the Code Generation Pane: Debug Tab

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Verbose build	On	No impact	No impact	On	On
Retain .rtw file	On	No impact	No impact	No impact	Off
Profile TLC	On	No impact	No impact	No impact	Off
Start TLC debugger when generating code	On	No impact	No impact	No impact	Off
Start TLC coverage when generating code	On	No impact	No impact	No impact	Off
Enable TLC assertion	On	No impact	No impact	On	Off

Mapping Application Requirements to the Code Generation Pane: Interface Tab

Configuration Parameter	Settings for Building Code				Factory Default
Configuration Parameter	Debugging	Traceability	Efficiency	Safety Precaution	Factory Default
Code replacement library	No impact	No impact	Any valid value	No impact	`C89/C90 (ANSI)`
Shared code placement	`Shared location` (GRT) No impact (ERT)	`Shared location` (GRT) No impact (ERT)	No impact (execution, RAM) `Shared location` (ROM)	No impact	`Auto`
Support non-finite numbers	No impact	No impact	Off (Execution, ROM) No impact (RAM)	Off	On
Classic call interface	No impact	Off	Off (execution, ROM), No impact (RAM)	Off	Off (except On for GRT models created before R2012a)
MAT-file logging	On	No impact	Off	Off	On (GRT) Off (ERT)
MAT-file variable name modifier	No impact	No impact	No impact	No impact	`rt_`
Interface	No impact	No impact	No impact	No impact (GRT) `None` (ERT)	`None`
Generate C API for: signals	No impact	No impact	No impact	No impact	On
Generate C API for: parameters	No impact	No impact	No impact	No impact	On
Generate C API for: states	No impact	No impact	No impact	No impact	Off
Transport layer	No impact	No impact	No impact	No impact	`tcpip`
MEX-file arguments	No impact	No impact	No impact	No impact	`''`
Static memory allocation	No impact	No impact	No impact	No impact	Off
Static memory buffer size	No impact	No impact	No impact	No impact	1000000

Parameter Command-Line Information Summary

The following table lists Simulink Coder parameters that you can use to tune model and target configurations. The table provides brief descriptions, valid values (bold type highlights defaults), and a mapping to Configuration Parameter dialog box equivalents. For descriptions of the panes and options in that dialog box, see Configuration Parameters in the Simulink Coder documentation.

Use the get_param and set_param commands to retrieve and set the values of the parameters on the MATLAB command line or programmatically in scripts.

The Configuration Wizard in the Embedded Coder product provides buttons and scripts for customizing code generation. See Use Configuration Wizard Blocks in the Embedded Coder documentation for information on using Configuration Wizard features.

For information about Simulink parameters, see Configuration Parameters Dialog Box in the Simulink documentation. For information on using get_param and set_param to tune the parameters for various model configurations, see Tune Parameters.

For parameters that are specific to the ERT target, or targets based on the ERT target, see Parameter Command-Line Information Summary in the Embedded Coder documentation.

Note Parameters that are specific to Stateflow or Simulink Fixed Point™ products are marked with (Stateflow) and (Simulink Fixed Point), respectively.

The default setting for a parameter might vary for different targets.

Command-Line Information: Optimization Pane: General Tab

Parameter and Values	Configuration Parameters Dialog Box Equivalent	Description
`BooleanDataType off,``on`	Optimization > Implement logic signals as Boolean data (vs. double)	Control the output data type of blocks that generate logic signals.
`EfficientFloat2IntCast` `off`, `on`	Optimization > Remove code from floating-point to integer conversions that wrap out-of-range values	Remove wrapping code that handles out-of-range floating-point to integer conversion results.
`EfficientMapNaN2IntZero` `off`, `on`	Optimization > Remove code from floating-point to integer conversions with saturation that maps NaN to zero	Remove code that handles floating-point to integer conversion results for `NaN` values.
`InitFltsAndDblsToZero` `off`, `on`	Optimization > Use memset to initialize floats and doubles to 0.0	Optimize initialization of storage for `float` and `double` values. Set this option if the representation of floating-point zero used by your compiler and target CPU is identical to the integer bit pattern 0.
`LifeSpan` `string`	Optimization > Application lifespan (days)	Optimize the size of counters used to compute absolute and elapsed time, using the specified application life span value.
`NoFixptDivByZeroProtection` (Simulink Fixed Point) `off`, `on`	Optimization > Remove code that protects against division arithmetic exceptions	Suppress generation of code that guards against division by zero for fixed-point data.
`UseFloatMulNetSlope` (Simulink Fixed Point) `off`, `on`	Optimization > Use floating-point multiplication to handle net slope corrections	Use floating-point multiplication to perform net slope correction for floating-point to fixed-point casts.
`UseIntDivNetSlope` (Simulink Fixed Point) `off`, `on`	Optimization > Use integer division to handle net slopes that are reciprocals of integers	Perform net slope correction using integer division when simplicity and accuracy conditions are met.

Command-Line Information: Optimization Pane: Signals and Parameters Tab

Parameter and Values	Configuration Parameters Dialog Box Equivalent	Description
`BufferReuse off,``on`	Optimization > Signals and Parameters > Reuse block outputs	Reuse local (function) variables for block outputs wherever possible. Selecting this option trades code traceability for code efficiency.
`EnableMemcpy` `off`, `on`	Optimization > Signals and Parameters > Use memcpy for vector assignment	Optimize code generated for vector assignment by replacing `for` loops with `memcpy` function calls.
`EnhancedBackFolding` `off`, `on`	Optimization > Signals and Parameters > Minimize data copies between local and global variables	Reuse existing global variables to store temporary results.
`ExpressionFolding` `off`, `on`	Optimization > Signals and Parameters > Eliminate superfluous local variables (Expression folding) > Interface	Collapse block computations into single expressions wherever possible. This improves code readability and efficiency.
`InlineInvariantSignals` `off`, `on`	Optimization > Signals and Parameters > Inline invariant signals	Precompute and inline the values of invariant signals in the generated code.
`LocalBlockOutputs` `off`, `on`	Optimization > Signals and Parameters > Enable local block outputs	Declare block outputs in local (function) scope wherever possible to reduce global RAM usage.
`MemcpyThreshold` `int -``64`	Optimization > Signals and Parameters > Memcpy threshold (bytes)	Specify the minimum array size in bytes for which `memcpy` function calls should replace `for` loops in the generated code for vector assignments.
`RollThreshold` `int -``5`	Optimization > Signals and Parameters > Loop unrolling threshold	Specify the minimum signal width for which a `for` loop is to be generated.
`MaxStackSize` `<Specify a value>`, `Inherit from target`	Optimization > Signals and Parameters > Maximum stack size (bytes)	Specify the maximum stack size in bytes for your model.

Command-Line Information: Optimization Pane: Stateflow Tab

Parameter and Values	Configuration Parameters Dialog Box Equivalent	Description
`DataBitsets` (Stateflow) `off`, `on`	Optimization > Stateflow > Use bitsets for storing Boolean data	Use bit sets for storing Boolean data.
`StateBitsets` (Stateflow) `off`, `on`	Optimization > Stateflow > Use bitsets for storing state configuration	Use bit sets for storing state configuration.

Command-Line Information: Code Generation Pane: General Tab

Parameter and Values Configuration Parameters Dialog Box Equivalent Description

CheckMdlBeforeBuild
string - off, warning, error Code Generation > Check model before generating code Specify whether to run Code Generation Advisor checks before generating code.

GenCodeOnly
string - off, on Code Generation > Generate code only Generate source code, but do not execute the makefile to build an executable.

GenerateMakefile
string - off, on Code Generation > Generate makefile Specify whether to generate a makefile during the build process for a model.

MakeCommand
string - make_rtw Code Generation > Make command Specify the make command and optional arguments to be used to generate an executable for the model.

ObjectivePriorities (GRT)
string - {''}, {'Debugging'}, {'Execution efficiency'} Code Generation > Select objective Specify the code generation objectives to use with the Code Generation Advisor.

ObjectivePriorities (ERT)
string - {''}, {'Efficiency'}, {'Traceability'}, {'Safety precaution'}, {'Debugging'} Code Generation > Set objectives Specify and prioritize the code generation objectives to use with the Code Generation Advisor.

RTWCompilerOptimization
string - Off, On, Custom

Code Generation > Compiler optimization level

Use this parameter to trade off compilation time against run time for your model code without having to supply compiler-specific flags to other levels of the Simulink Coder build process.

Off - Turn compiler optimizations off for faster builds

On - Turn compiler optimizations on for faster code execution

Custom - Specify custom compiler optimization flags via the
RTWCustomCompilerOptimizations parameter

RTWCustomCompiler Optimizations
string - '', unquoted string of compiler optimization flags Code Generation > Custom compiler optimization flags If you specified Custom to the RTWCompilerOptimization parameter, use this parameter to specify custom compiler optimization flags, for example, -O2.

SaveLog
off, on Code Generation > Save build log Save build log.

SystemTargetFile
string - grt.tlc Code Generation > System target file Specify a system target file.

TargetLang
string - C, C++, C++ (Encapsulated) (ERT) Code Generation > Language Specify whether to generate C code, C++ compatible code, or C++ encapsulated code. The C++ (Encapsulated) value appears only when you select an ERT system target file for the model. Using C++ (Encapsulated) to generate code requires an Embedded Coder license.

TemplateMakefile
string - grt_default_tmf Code Generation > Template makefile Specify the current template makefile for building a Simulink Coder target.

TLCOptions
string - '' Code Generation > TLC options Specify additional TLC command line options.

Command-Line Information: Code Generation Pane: Report Tab

Parameter and Values	Configuration Parameters Dialog Box Equivalent	Description
`GenerateReport` `string` - `off`, `on`	Code Generation > Report > Create code generation report	Document the generated C or C++ code in an HTML report.
`LaunchReport` `string` - `off`, `on`	Code Generation > Report > Launch report automatically	Display the HTML report after code generation completes.

Command-Line Information: Code Generation Pane: Comments Tab

Parameter and Values	Configuration Parameters Dialog Box Equivalent	Description
`ForceParamTrailComments` `string` - `off`, `on`	Code Generation > Comments > Verbose comments for SimulinkGlobal storage class	Specify that comments be included in the generated file. To reduce file size, the model parameters data structure is not commented when there are more than 1000 parameters.
`GenerateComments` `string` - `off`, `on`	Code Generation > Comments > Include comments	Include comments in generated code.
`ShowEliminatedStatement` `string` - `off`, `on`	Code Generation > Comments > Show eliminated blocks	Show statements for eliminated blocks as comments in the generated code.
`SimulinkBlockComments` `string` - `off`, `on`	Code Generation > Comments > Simulink block / Stateflow object comments	Insert Simulink block and Stateflow object names as comments above the generated code for each block.

Command-Line Information: Code Generation Pane: Symbols Tab

Parameter and Values	Configuration Parameters Dialog Box Equivalent	Description
`MaxIdLength` `int -``31`	Code Generation > Symbols > Maximum identifier length	Specify the maximum number of characters that can be used in generated function, type definition, and variable names.
`ReservedNameArray` `string array` - `{}`	Code Generation > Symbols > Reserved names	Enter the names of variables or functions in the generated code that match the names of variables or functions specified in custom code to avoid name conflicts.
`UseSimReservedNames` `string` - `off`, `on`	Code Generation > Symbols > Use the same reserved names as Simulation Target	Specify whether to use the same reserved names as those specified in the Simulation Target > Symbols pane.

Command-Line Information: Code Generation Pane: Custom Code Tab

Parameter and Values Configuration Parameters Dialog Box Equivalent Description

CustomHeaderCode
string - '' Code Generation > Custom Code > Header file Specify code to appear near the top of the generated model header file.

CustomInclude
string - ''

Code Generation > Custom Code > Include directories

Specify a space-separated list of include folders to add to the include path when compiling the generated code.

Note If your list includes any Windows path strings that contain spaces, each instance must be enclosed in double quotes within the argument string, for example,

'C:\Project "C:\Custom Files"'

CustomInitializer
string - '' Code Generation > Custom Code Specify code to appear in the generated model initialize function.

CustomLibrary
string - '' Code Generation > Custom Code > Initialize function Libraries Specify a space-separated list of static library files to link with the generated code.

CustomSource
string - '' Code Generation > Custom Code > Source files Specify a space-separated list of source files to compile and link with the generated code.

CustomSourceCode
string - '' Code Generation > Custom Code > Source file Specify code to appear near the top of the generated model source file.

CustomTerminator
string - '' Code Generation > Custom Code > Terminate function Specify code to appear in the generated model terminate function.

RTWUseSimCustomCode
string - off, on Code Generation > Custom Code > Use the same custom code settings as Simulation Target Specify whether to use the same custom code settings as those in the Simulation Target > Custom Code pane.

Command-Line Information: Code Generation Pane: Debug Tab

Parameter and Values	Configuration Parameters Dialog Box Equivalent	Description
`ProfileTLC` string - `off`, `on`	Code Generation > Debug > Profile TLC	Profile the execution time of each TLC file used to generate code for this model in HTML format.
`RTWVerbose` string - `off`, `on`	Code Generation > Debug > Verbose build	Display messages indicating code generation stages and compiler output.
`RetainRTWFile` string - `off`, `on`	Code Generation > Debug > Retain .rtw file	Retain the `model``.rtw` file in the current build folder.
`TLCAssert` string - `off`, `on`	Code Generation > Debug > Enable TLC assertion	Produce a TLC stack trace when the argument to the `assert` directives evaluates to `false`.
`TLCCoverage` string - `off`, `on`	Code Generation > Debug > Start TLC coverage when generating code	Generate `.log` files containing the number of times each line of TLC code is executed during code generation.
`TLCDebug` string - `off`, `on`	Code Generation > Debug > Start TLC debugger when generating code	Start the TLC debugger during code generation at the beginning of the TLC program. TLC breakpoint statements automatically invoke the TLC debugger regardless of this setting.

Command-Line Information: Code Generation Pane: Interface Tab

Parameter and Values Configuration Parameters Dialog Box Equivalent Description

CodeReplacementLibrary
string - ANSI_C, C99 (ISO), GNU99 (GNU), C++ (ISO)

(For ERT-based models, additional target-specific values may be available; see the Code replacement library drop-down list in the Configuration Parameters dialog box.)

Code Generation > Interface > Code replacement library

Specify a target-specific math library for your model. Verify that your compiler supports the library you want to use; otherwise compile-time errors can occur.

ANSI_C - ISO/IEC 9899:1990 C standard math library for floating-point functions

C99 (ISO) - ISO/IEC 9899:1999 C standard math library

GNU99 (GNU) - GNU gcc math library, which provides C99 extensions as defined by compiler option -std=gnu99

C++ (ISO) - ISO/IEC 14882:2003 C++ standard math library

ExtMode
off, on Code Generation > Interface > Interface Specify the data interface to be generated with the code.

ExtModeMexArgs
string ('') Code Generation > Interface > Interface > External > MEX-file arguments Specify arguments that are passed to an external mode interface MEX-file for communicating with executing targets.

ExtModeStaticAlloc
off, on Code Generation > Interface > Static memory allocation Use a static memory buffer for external mode instead of allocating dynamic memory (calls to malloc).

ExtModeStaticAllocSize
integer (1000000) Code Generation > Interface > Static memory buffer size Specify the size in bytes of the external mode static memory buffer.

ExtModeTransport
int - 0 for TCP/IP, 1 for Windows serial Code Generation > Interface > Interface > External > Transport layer Specify transport protocols for external mode communications.

GenerateASAP2
off, on Code Generation > Interface > Interface Specify the data interface to be generated with the code.

GRTInterface
string - off (except on for GRT models created before R2012a), on Code Generation > Interface > Classic call interface Include a code interface (wrapper) that is compatible with the pre-R2012a GRT target.

LogVarNameModifier
string - none, rt_, _rt Code Generation > Interface > MAT-file variable name modifier Augment the MAT-file variable name.

MatFileLogging
string - off, on
(Default is on for GRT targets, off for ERT targets) Code Generation > Interface > MAT-file logging Generate code that logs data to a MAT-file.

RTWCAPIParams
string - off, on Code Generation > Interface > Generate C API for: parameters Generate C API parameter tuning structures.

RTWCAPISignals
string - off, on Code Generation > Interface > Generate C API for: signals Generate C API signal structure.

RTWCAPIStates
string - off, on Code Generation > Interface > Generate C API for: states Generate C API state structure.

SupportNonFinite
string - off, on Code Generation > Interface > Support non-finite numbers Support nonfinite values (inf, nan, -inf) in the generated code.

UtilityFuncGeneration
string - Auto, Shared location Code Generation > Interface > Shared code placement Specify where utility code is to be generated.

Command-Line Information: Not in GUI

Parameter and Values	Configuration Parameters Dialog Box Equivalent	Description
`CodeGenDirectory`	Not available	For MathWorks use only.
`Comment`	Not available	For MathWorks use only.
`CompOptLevelCompliant` `off`, `on`	Not available	Set in `SelectCallback` for a target to indicate whether the target supports the ability to use the Compiler optimization level parameter on the Code Generation pane to control the compiler optimization level for building generated code. Default is `off` for custom targets and `on` for targets provided with the Simulink Coder and Embedded Coder products.
`ConfigAtBuild`	Not available	For MathWorks use only.
`ConfigurationMode`	Not available	For MathWorks use only.
`ConfigurationScript`	Not available	For MathWorks use only.
`ERTCustomFileBanners`	Not available	For MathWorks use only.
`EvaledLifeSpan`	Not available	For MathWorks use only.
`ExtModeMexFile`	Not available	For MathWorks use only.
`ExtModeTesting`	Not available	For MathWorks use only.
`FoldNonRolledExpr`	Not available	For MathWorks use only.
`GenerateFullHeader`	Not available	For MathWorks use only.
`IncAutoGenComments`	Not available	For MathWorks use only.
`IncludeRegionsInRTWFile BlockHierarchyMap`	Not available	For MathWorks use only.
`IncludeRootSignalInRTWFile`	Not available	For MathWorks use only.
`IncludeVirtualBlocksInRTW FileBlockHierarchyMap`	Not available	For MathWorks use only.
`IsERTTarget`	Not available	For MathWorks use only.
`IsPILTarget`	Not available	For MathWorks use only.
`ModelReferenceCompliant` string - `off`, `on`	Not available	Set in `SelectCallback` for a target to indicate whether the target supports model reference.
`ParamNamingFcn`	Not available	For MathWorks use only.
`PostCodeGenCommand` `string` - `''`	Not available	Add the specified post code generation command to the model build process.
`PreserveName`	Not available	For MathWorks use only.
`PreserveNameWithParent`	Not available	For MathWorks use only.
`ProcessScript`	Not available	For MathWorks use only.
`ProcessScriptMode`	Not available	For MathWorks use only.
`SignalNamingFcn`	Not available	For MathWorks use only.
`SystemCodeInlineAuto`	Not available	For MathWorks use only.
`TargetFcnLib`	Not available	For MathWorks use only.
`TargetLibSuffix` `string` - `''`	Not available	Control the suffix used for naming a target's dependent libraries (for example, `_target.lib` or `_target.a`). If specified, the string must include a period (.). (For generated model reference libraries, the library suffix defaults to `_rtwlib.lib` on Windows systems and `_rtwlib.a` on UNIX systems.)
`TargetPreCompLibLocation` `string` - `''`	Not available	Control the location of precompiled libraries. If you do not set this parameter, the code generator uses the location specified in `rtwmakecfg.m`.
`TargetPreprocMaxBitsSint` int - `32`	Not available	Specify the maximum number of bits that the target C preprocessor can use for signed integer math.
`TargetPreprocMaxBitsUint` int - `32`	Not available	Specify the maximum number of bits that the target C preprocessor can use for unsigned integer math.
`TargetTypeEmulationWarn SuppressLevel SuppressLevel` int - `0`	Not available	When greater than or equal to 2, suppress warning messages that the Simulink Coder software displays when emulating integer sizes in rapid prototyping environments.

Code Generation Pane: IDE Link

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