2a82301d40
Apparently clang trunk implemented __builtin_source_location(), but the using __builtin_ret_type = decltype(__builtin_source_location()); which has been added for it isn't enough, they also need the std::source_location::__impl class to be defined (but incomplete seems to be good enough) before the builtin is used. The following has been tested on godbolt with clang trunk (old version fails with error: 'std::source_location::__impl' was not found; it must be defined before '__builtin_source_location' is called and some follow-up errors), getting back to just void * instead of __builtin_ret_type and commenting out using doesn't work either and just struct __impl; before using __builtin_ret_type doesn't work too. 2022-04-02 Jakub Jelinek <jakub@redhat.com> PR libstdc++/105128 * include/std/source_location (std::source_location::__impl): Move definition before using __builtin_ret_type. |
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file: libstdc++-v3/README New users may wish to point their web browsers to the file index.html in the 'doc/html' subdirectory. It contains brief building instructions and notes on how to configure the library in interesting ways.