cmake: enable -pedantic-errors for clang when CURL_WERROR=ON
#13286
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`-pedantic-errors` option throws a warning with GCC (all versions) in `check_symbol_exists()`, which makes feature checks fail. CMake v3.23.0 (2022-03-29) introduced a workaround: https://gitlab.kitware.com/cmake/cmake/-/issues/13208 https://gitlab.kitware.com/cmake/cmake/-/commit/eeb45401163d831b8c841ef6eba81466b4067b68 https://gitlab.kitware.com/cmake/cmake/-/commit/1ab7c3cd28b27ca162c4559e1026e5cad1898ade Make sure to not enable this option for CMake versions older than that. Follow-up to 3829759 curl#12489
clang doesn't have the issues of GCC and old CMake versions. Note: This introduces asymmetry with autotools, which only enables this for GCC. Closes #xxxxx
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bagder
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Apr 5, 2024
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clang doesn't have the issues of GCC and old CMake versions.
Note: This introduces asymmetry with autotools, which only enables
this for GCC.
Closes #13286