CCS/C66: error when calling dsplib.h function from c++ code

Farhad Gholami18

Prodigy 120 points

Part Number: DRA746

Tool/software: Code Composer Studio

I have DSPF_sp_fir_gen() in my cpp source code (g++ compiler) and have included header files as recommended:

extern "C" {

#include "C:/Proj/carRepo/partners/ti/dsplib_c66x_3_4_0_0/packages/ti/dsplib/src/DSP_urand32/c66/DSP_urand32.h"

#include "C:/Proj/carRepo/partners/ti/dsplib_c66x_3_4_0_0/packages/ti/dsplib/dsplib.h"
}

but still see below error:

"C:/Proj/carRepo/partners/ti/dsplib_c66x_3_4_0_0/packages/ti/dsplib/src/DSP_urand32/c66/DSP_urand32.h", line 223: error: badly formed pragma
"C:/Proj/carRepo/partners/ti/dsplib_c66x_3_4_0_0/packages/ti/dsplib/src/DSP_urand32/c66/DSP_urand32.h", line 224: error: expected a ")"
"C:/Proj/carRepo/partners/ti/dsplib_c66x_3_4_0_0/packages/ti/dsplib/src/DSP_urand32/c66/DSP_urand32.h", line 268: error: badly formed pragma
"C:/Proj/carRepo/partners/ti/dsplib_c66x_3_4_0_0/packages/ti/dsplib/src/DSP_urand32/c66/DSP_urand32.h", line 269: error: expected a ")"
"C:/Proj/carRepo/partners/ti/dsplib_c66x_3_4_0_0/packages/ti/dsplib/src/DSP_urand32/c66/DSP_urand32.h", line 323: error: badly formed pragma
"C:/Proj/carRepo/partners/ti/dsplib_c66x_3_4_0_0/packages/ti/dsplib/src/DSP_urand32/c66/DSP_urand32.h", line 324: error: expected a ")"

Thanks,

Farhad

over 7 years ago

0 George Mock over 7 years ago

TI__Guru**** 251230 points

I'm not familiar with dsplib. But I did install it, and I can reproduce that diagnostic. From that, I can tell you it is obvious this file was never tested for C++. It is likely that none of dsplib is tested to work with C++.

If you want the current release to work with C++, then you have accept responsibility for the needed changes. If you want changes for C++ to be implemented in a future release, please let me know. I will find the team responsible and have them file an issue on the product.

Thanks and regards,

-George

0 Farhad Gholami18 over 7 years ago in reply to George Mock

Prodigy 120 points

Hi
So solutions like below never tested?
Just declare the C function extern "C" (in your C++ code) and call it (from your C or C++ code).

stackoverflow.com/.../call-a-c-function-from-c-code

How to mix C and C++:
isocpp.org/.../mixing-c-and-cpp

0 Farhad Gholami18 over 7 years ago in reply to Farhad Gholami18

Prodigy 120 points

This is very importnat for us to be able to use optimize dsplib library function in c66 core.

0 George Mock over 7 years ago in reply to Farhad Gholami18

TI__Guru**** 251230 points

Farhad Gholami18 said:
So solutions like below never tested?
Just declare the C function extern "C" (in your C++ code) and call it (from your C or C++ code).

No. The dsplib header files were never tested under those conditions.

Thanks and regards,

-George

0 George Mock over 7 years ago in reply to Farhad Gholami18

TI__Guru**** 251230 points

Farhad Gholami18 said:
This is very importnat for us to be able to use optimize dsplib library function in c66 core.

I understand. I'll find the team that supplies dsplib, and let them know about this thread.

Thanks and regards,

-George

0 Rahul Prabhu over 7 years ago in reply to George Mock

TI__Guru** 116770 points

The DSPLIB library is not tested to support C++ builds so the headers need minor edits to work with C++ code. Other than adding extern “C” around function defines in the headers, the pragma statements need to be handled differently when integrating with C++ code. For handling of #pragma in C++ code, refer to the following article:
processors.wiki.ti.com/.../Pragmas_in_C++

I was able to create a quick test case for DSP_urand32 and have provided an updated header file that you can use as reference when integrating other DSPLIB functions in C++ code.

DSP_urand32.h

Hope this resolves your issue.

Regards,
Rahul

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CCS/C66: error when calling dsplib.h function from c++ code