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_Bool is undefined

CorderBollie
Prodigy 70 points

I've recently updated the toolchain for C2000 from 6.4.4. to 6.4.5.

I noticed, that almost all include files were changed and the compiler now uses a modified STL Port version.

The problem is that if I compile a .cpp file that includes e.g. F2837xD_device.h from device support, then the compiler produces an error like:

"D:/ti/controlSUITE/device_support/F2837xD/v160/F2837xD_headers/include/F2837xD_device.h", line 114: error #20: identifier "_Bool" is undefined
"D:/ti/controlSUITE/device_support/F2837xD/v160/F2837xD_headers/include/F2837xD_device.h", line 118: error #20: identifier "_Bool" is undefined

With 6.4.4. we solved the problem by adding the correct namespace identifier like:

// C99 defines boolean type to be _Bool, but this doesn't match the format of
// the other standard integer types.  bool_t has been defined to fill this gap.
typedef _STD _Bool bool_t;
//typedef _Bool bool_t;

//used for a bool function return status
typedef _STD _Bool status_t;
//typedef _Bool status_t;

Because we think that _Bool should be defined in namespace std (for C++) and with no namespace for C code. This is not longer working with 6.4.5. because yvals.h is gone (which defined _STD empty for C code in 6.4.4.).

Is there a workaround for _Bool being not defined when a cpp file is compiled that includes any file from the device support folder?

  • 0
    TI__Guru**** 244190 points

    I don't know what is going on.  I do suspect some problem in the compiler.  I tried to reproduce it, but failed.  Please preprocess the problem file and attach it to your next post. 

    Thanks and regards,

    -George

  • 0 in reply to George Mock
    TI__Expert 4540 points

    We have determined that a mistake was made when creating the 6.4.5 release. That release should continue using Dinkumware for the C++ RTS. We have removed 6.4.5 from the CCS update site and the standalone download page. In the next few days we will release 6.4.6 with the correct RTS. 

    With regard to using _STD, you should not rely on this being available in future versions of the compiler. The next compiler releases will be using STLPort for the C++ implementation.

  • 0 in reply to Cody Addison
    Intellectual 710 points
    Cody,
    I to am still having this issue with _Bool being undefined in F2837xS_device.h.
    I am using verions 6.4.6 which was supposed to have fixed this according to posts.
    I have gone in and fixed the issue in the header by adding a typedef bool bool_t but it seems I should not have to edit the supplied header files.
    Has this been resolved another way or is that my fix?
    thanks
    maury
  • 0 in reply to maurywalters
    TI__Guru**** 244190 points

    I suspect something else is wrong.  _Bool is defined the same way in versions 6.4.4 (prior to the problem with 6.4.5) and 6.4.6.  I suggest using the --gen_acp_raw switch to help diagnose the problem.  Please read about it in the C2000 compiler manual.  

    Thanks and regards,

    -George

  • 0 in reply to maurywalters
    TI__Guru* 84225 points

    There are three language modes to think about: C89, C99, and C++.  C89 does not provide _Bool or bool.  C99 provides _Bool, and if you include stdbool.h you also get bool.  C++ provides bool but not _Bool.

    I'm not sure exactly what version of F2837xD_device.h you are using.  Perhaps it looks similar to this?

    github.com/.../F2837xS_device.h

    That file is clearly designed to work with C89 or C99.  It will not work correctly under C++ without some extra definitions.  I think this is a flaw in that header file.  It does include stdbool.h, but then uses _Bool where it should use bool.

    Your workaround should be:

    #if defined(__cplusplus)
typedef bool _Bool;
#endif
  • 0 in reply to Archaeologist
    Prodigy 110 points

    The F2837xS_device.h version you posted is v1.70. I'm using v1.91 and have the same problem, so no official fix has been done to this file.