Compile fails when defining ETL_HAS_CONSTEXPR_ENDIANESS=1

[serges147]

etl/unaligned_type.h has several places with following:

#if ETL_HAS_CONSTEXPR_ENDIANESS
          if ETL_IF_CONSTEXPR(Endian == etl::endianness::value())
#else
          if (Endian_ != etl::endianness::value())
#endif
          ...

Endian -> Endian_ .

Also, there are warnings about:

".../include/etl/unaligned_type.h", line 421: remark #195-D: zero used for undefined preprocessing identifier "ETL_HAS_CONSTEXPR_ENDIANESS"

when manually defining -DETL_ENDIAN_NATIVE=1 (for TI compiler, big-endian target), but not defining ETL_HAS_CONSTEXPR_ENDIANESS.
Should we guard by #ifdef ETL_HAS_CONSTEXPR_ENDIANESS ?

[rolandreichweinbmw]

The usual pattern is to define ETL_HAS_* in platform.h depending on yet another preprocessor symbol. That one seems to be missing currently from platform.h.

I consider it a bug in platform.h which needs to be fixed.

[rolandreichweinbmw]

Update: Turns out to be 3 typos at once to be fixed in unaligned_type.h (and ETL_HAS_CONSTEXPR_ENDIANNESS (w/ double N) is defined in endianness.h).