Linking failed on dSPACE1006 using 2Level S-function

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Hedi BASBAS 2021-1-15

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回答： UDAYA PEDDIRAJU 2024-5-14

I have a problem in the build process of my Simulink model which contains only 1 S-function. In the code of this S-Function, I call 4 external routines "FAST_Start", "FAST_Update" etc ... which are defined in a header file "FAST_Library.h" with this writing :

"EXTERNAL_ROUTINE void FAST_Sizes(double *TMax, double *InitInputAry, char *InputFileName, int *AbortErrLev, int * NumOuts, double * dt, int *ErrStat, char *ErrMsg, char *ChannelNames);"

The access of the function contents is possible with the library : FAST_Library_Win32.dll or FAST_Library_Win32.lib.

Thus the mex file is well done and the simulation works well on Simulink. However, when I want to build it on dSPACE1006 target, I get the following errors :

I understand that the linking process tries to find these functions but they seem to but not defined. It would mean that he could not find my libraries, right ?

Maybe there are additionnal steps to configure entire build process ?!

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Answer 1

UDAYA PEDDIRAJU 2024-5-14

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Hi Hedi,

Cause: Linker can't find function definitions from external libraries (FAST_Library.h).

Solutions:

Configure Build Process: Refer to "dSPACE" documentation for adding custom libraries to the build process (e.g., specifying library paths).
Provide Library Files: Ensure necessary library files (.dll or .lib) are included in the "dSPACE" target build directory.
Consider Header-Only Library: If possible, rewrite external functions as header-only functions to eliminate separate library files.