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ETLCPP / etl

Embedded Template Library
https://www.etlcpp.com
MIT License
2.25k stars 393 forks source link

For GCC10, check __cplusplus >= 201709 for c++20 support #949

Closed schemborerik closed 2 months ago

schemborerik commented 2 months ago

From here: https://godbolt.org/z/n967rrMGY you can see that using GCC 10 and compiling with -stdc++=20 that __cplusplus evaluates to 201709. Switching to GCC 11, it evaluates to 202002. This was problematic in our build as ETL_CPP20_SUPPORTED was not being detected correctly and we were having issues with redefinition of char8_t. Tried to workaround by setting ETL_NO_SMALL_CHAR_SUPPORT=0, however parts of our build use -stdc++=17 which would then fail with this flag due to missing definition of char8_t.

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