call to non-constexpr function

[854768750]

After I pull the latest spdlog and recompile it, my code cannot compile.
/opt/spdlog/include/spdlog/common-inl.h:16:43: error: call to non-constexpr function 'fmt::v7::basic_string_view<Char>::basic_string_view(const Char*) [with Char = char]' static string_view_t level_string_views[] SPDLOG_LEVEL_NAMES;

And I checkout to the commit before #1798, there is no error. Does this pull request cause the problem? @gv-me
Even something like logger->info("{0}",idx); connot pass the compilation where idx is an int.

[gv-me]

are you using C++11 or older? And are you using compiled or header only version or spdlog? Please give the full error output.

I suspect this could be coming from constructor fmt::basic_string_view(const Char* s) in fmt/core.h:380.
This is conditionally made constexpr by fmt for C++>=17 where it could have been made from C++ >= 14 in which the required constexpr features were made available. So this could be a potential issue for C++ 14 users.

Ideally the flags should be changed in fmt function declarations. If you switch to C++ 17 this will not be a problem.
If you must use C++14, as a workaround you can change the #if __cplusplus >= 201402L at line 13 in common-inl.h to #if __cplusplus >= 201703L and see if it works.

[854768750]

change the #if __cplusplus >= 201402L at line 13 in common-inl.h to #if __cplusplus >= 201703L works. Thank you.