After generating code for a model, the build process determines whether to compile and link an executable program. Various factors guide this determination:
Generate code only option
When you select this option, the code generator produces code for the model, including a makefile.
Generate makefile option
When you clear this option, the code generator does not produce a makefile for the model. You must specify post code generation processing, including compilation and linking, as a user-defined command, as explained in Customize Post-Code-Generation Build Processing.
Makefile-only target
The Microsoft®
Visual C++® Project Makefile versions of the grt
and Embedded Coder® target configurations generate a Visual C++ project makefile
(model.makmodel.mak
HOST template makefile variable
The template makefile variable HOST identifies the type of
system upon which your executable is intended to run. The variable can be set to
one of three possible values: PC, UNIX, or
ANY.
By default, HOST is set to UNIX in
template makefiles designed for use with The Open Group UNIX® platforms (such as grt_unix.tmf), and to
PC in the template makefiles designed for use with
development systems for the PC (such as grt_vc.tmf).
If the Simulink® software is running on the same type of system as the system
specified by the HOST variable, then the executable is built.
Otherwise,
If HOST = ANY, an executable is still built. This
option is useful when you want to cross-compile a program for a system
other than the one that the Simulink software is running on.
Otherwise, processing stops after generating the model code and the makefile; the following message is displayed on the MATLAB® command line.
### Make will not be invoked - template makefile is for a different host
TGT_FCN_LIB template makefile variable
The template makefile variable TGT_FCN_LIB specifies
compiler command-line options. The line in the makefile is TGT_FCN_LIB
= |>TGT_FCN_LIB<|. Use this token in a makefile conditional
statement to specify a standard math library as a compiler option. Possible
|>TGT_FCN_LIB<| token values are:
| Value | Generates Calls To |
|---|---|
| Name of custom CRL | ISO®/IEC 9899:1990 C (ANSI_C)
standard math library |
ISO_C | ISO/IEC 9899:1999 C standard math library |
ISO_C++ | ISO/IEC 14882:2003 C++ standard math library |
GNU | GNU extensions to the ISO/IEC 9899:1999 C standard math library |