Clearer message for functions not supported on platform

[steved]

chSysPolledDelayX() and other functions are not supported on the 32L0 family. The error message is 'undefined function'; took me a little while to realise it was really 'unsupported function'.
It's possible to generate clearer error messages for this scenario; the following change to chsys.h works:

Code: Select all

#if PORT_SUPPORTS_RT == TRUE
  bool chSysIsCounterWithinX(rtcnt_t cnt, rtcnt_t start, rtcnt_t end);
  void chSysPolledDelayX(rtcnt_t cycles);
#else
  #define   chSysIsCounterWithinX(a, b, c)   _Pragma("GCC error \"chSysIsCounterWithinX() not available on platform\"")
  #define   chSysPolledDelayX(a) _Pragma("GCC error \"chSysPolledDelayX() not available on platform\"")
#endif

(Documentation on _Pragma: https://gcc.gnu.org/onlinedocs/gcc-8.3. ... agmas.html)

[Giovanni]

Hi,

It is a good idea, is that pragma standard?

Giovanni

[steved]

Hi,

It is a good idea, is that pragma standard?

Giovanni

Part of C99 standard, according to gcc link
Not checked the detail against the standard.