fmt::output_file unusable in header only

[Allybag]

Attempting to use fmt::output_file gives the following linker error when installed only as headers, as the missing functions are all only in os.cc:

ld: Undefined symbols:
fmt::v10::detail::file_buffer::file_buffer(fmt::v10::basic_cstring_view, fmt::v10::detail::ostream_params const&), referenced from:
_main in main.cpp.o
fmt::v10::ostream::~ostream(), referenced from:
_main in main.cpp.o
_main in main.cpp.o
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Would it be possible to support this?

Thanks for a great project!

[vitaut]

There are no plans to extend header-only support to system APIs (fmt/os.h).