DSP/BIOS problem in sys.h and tsk.h when used with C++ code

Todor Sergueev Petkov

Prodigy 110 points

Hi, I am using DSP/BIOS 5.31.07 with some C++ code. The problem I am seeing is:

1. In sys.h the declaration of:

extern Void SYS_error(String s, Int errno, ...);

gets expanded by the pre-processor to:

extern Void SYS_error(String s, Int ::std::errno, ...);

which causes a compilation error.

2. In tsk.h the declaration of the structure TSK_Obj also

contains the following line:

Int errno; /* TSK_seterr()/TSK_geterr() */

which is expanded by the pre-processor to

Int ::std::errno

which also causes a compilation error.

In the first case (sys.h) I could rename the function parameter and that would solve the problem.

The second case is trickier.

Do you have any suggestions of how to solve this issue ?!

Thanks very much in advance,

Todor Petkov

over 12 years ago

0 Whitney Dewey over 12 years ago

TI__Guru 53745 points

Hello,

Have you looked at the "bigtime" example that comes with DSP/BIOS?

<bios install directory>\packages\ti\bios\examples\bigtime.cpp

Please also review this page:

http://processors.wiki.ti.com/index.php/Overview_of_C%2B%2B_Support_in_TI_Compilers

Thanks,

Whitney

0 Todor Sergueev Petkov over 12 years ago in reply to Whitney Dewey

Prodigy 110 points

Hi, I have looked at the example however it does not resolve my issue.

I have traced the problem to the following lines in errno.h ( c6000_7.4.2\include\errno.h : line 85 ) :

#ifdef __cplusplus
      #define errno ::std::errno

#else
      #define errno errno

 #endif

When __cplusplus is defined errno expands to ::std::errno which causes trouble in the sys.h and tsk.h files as I mentioned in my first post.
The only solution I have found thus far is to move the errno.h include after any other includes files (any bios include files) !
However it is not very reassuring that the order of include files has such a big influence on the final results of compilation...

0 Sasha Slijepcevic over 12 years ago in reply to Todor Sergueev Petkov

TI__Mastermind 37985 points

Todor,
what's the compilation error you are seeing?

0 Todor Sergueev Petkov over 12 years ago in reply to Sasha Slijepcevic

Prodigy 110 points

Hi the erro is as follows :

bios_5_31_07/packages/ti/bios/include/sys.h", line 78: error #278: name followed by "::" must be a class or namespace name

That is due to the fact that that in sys.h in the following function

extern Void SYS_error(String s, Int errno, ...);

errno expands to

extern Void SYS_error(String s, Int ::std::errno, ...);

which is no good.

This is because errno.h gets included before sys.h. I resolved the problem by moving

#include <errno.h> after #include <sys.h>

But just wanted to signal this behaviour.

Thanks,

Todor

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DSP/BIOS problem in sys.h and tsk.h when used with C++ code