RTOS/PROCESSOR-SDK-AM437X: Compilation error

Marcio Borges

Expert 1950 points

Tool/software: TI-RTOS

Hi,
I´d like to code my application in C++. I´ve wrote a main.cpp file, which calls Board_init().

I´ve put Board_init() prototype within "extern "C" {}" as following:

extern "C" {
Board_STATUS Board_init(Board_initCfg cfg);
}

When I compile I get the following error:
"conflicting declaration of 'Board_STATUS Board_init(Board_initCfg)' with 'C' linkage"

Does someone can help me?

Installed itens:
CCS 7.2
GCC ARM Compiler 4.9.3
processor_sdk_rtos_am437x 4.00.00.04
am437x PDK v1.0.7
bios 6.46.05.55
xdctools 3.32.02.25_core

Board: AM437x Starter Kit

regards,

over 7 years ago

0 Marcio Borges over 7 years ago

Expert 1950 points

Part Number: PROCESSOR-SDK-AM437X

Tool/software: TI-RTOS

Hi,
I think a '}' is missing to close the 'extern "C"' in ti/drv/emac/src/v4/emac_drv_v4.h of Am437x PDK v1.0.7.

regards,

Marcio

0 Biser Gatchev-XID over 7 years ago

TI__Guru**** 393215 points

The RTOS team have been notified. They will respond here.

0 lding over 7 years ago in reply to Biser Gatchev-XID

TI__Guru* 95265 points

Hi,

Yes, '}' is missing to close the 'extern "C"' in ti/drv/emac/src/v4/emac_drv_v4.h of Am437x PDK v1.0.7 or latest v 1.0.8. I will fill a ticket.

Is this missing related to your reported issue: conflicting declaration of 'Board_STATUS Board_init(Board_initCfg)' with 'C' linkage"? I saw some discussion: stackoverflow.com/.../compiling-program-containing-extern-c. It may be.

If you fixed that header file, does it work for you?

Regards, Eric

0 Marcio Borges over 7 years ago in reply to lding

Expert 1950 points

Unfortunately not.

The problem persists after I fixed emac_drv_v4.h.

The problem goes away if I comment out the call to Board_init().

I can get rid of the problem by calling Board_init() from a wrap function on a .c file and then calling this function on my .cpp file, using extern "C".

regards,

0 lding over 7 years ago in reply to Marcio Borges

TI__Guru* 95265 points

Hi,

Thanks for letting me know. Calling Board_init() from a wrap function on a .c file and then calling this function on my .cpp file, using extern "C" is a way to resolve this. I opened a ticket for the header file.

Regards, Eric

0 lding over 7 years ago in reply to lding

TI__Guru* 95265 points

Marcio,

By chance, do you have a simple C++ project showing the problem? What is the compiler used and compiler option setting? If yes you can upload one for us, it is great!

Regards, Eric

0 Marcio Borges over 7 years ago in reply to lding

Expert 1950 points

Hi Eric,

The compiler options I took from an example, if I am not wrong, NIMU_BasicExample_skAM437x_armExampleproject.

The project is attached. Change all '#if 1' to '#if 0' compile without errors.

regards,

Marcio

ced2_skAM437x_0.zip

0 Marcio Borges over 7 years ago in reply to lding

Expert 1950 points

Hi Eric,
Just to let you know, I had the same problem when calling "emac_poll()". I've resolved it adding 'extern "C"' in emac_drv.h.
#ifdef __cplusplus
extern "C" {
#endif
revards,
Marcio.

0 lding over 7 years ago in reply to Marcio Borges

TI__Guru* 95265 points

Hi,

Thanks for letting me know, I will update those in the next release.

Regards, Eric

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RTOS/PROCESSOR-SDK-AM437X: Compilation error