fmt - formattable evaluates to false

[theoparis]

Describe the bug

I tried to build bear, spdlog and fmt from source, as the arch linux package can't be used due to spdlog not bundling fmt and causing runtime errors.

/usr/include/c++/11.2.0/bits/std_function.h:413:9:   required by substitution of ‘template<class _Functor, class, class> std::function<void(const sys::Process&)>::function(_Functor) [with _Functor = {anonymous}::spawn_process({anonymous}::spawn_function_t, const std::filesystem::__cxx11::path&, const std::__cxx11::list<std::__cxx11::basic_string<char> >&, const std::map<std::__cxx11::basic_string<char>, std::__cxx11::basic_string<char> >&)::<lambda(const auto:10&)>; <template-parameter-1-2> = void; <template-parameter-1-3> = void]’
/home/theo/dev/Bear/source/libsys/source/Process.cc:160:28:   required from here
/usr/local/include/fmt/core.h:1724:7: error: static assertion failed: Cannot format an argument. To make type T formattable provide a formatter<T> specialization: https://fmt.dev/latest/api.html#udt
 1724 |       formattable,
      |       ^~~~~~~~~~~
/usr/local/include/fmt/core.h:1724:7: note: ‘formattable’ evaluates to false
/home/theo/dev/Bear/source/libsys/source/Process.cc:59:19: warning: ‘std::ostream& {anonymous}::operator<<(std::ostream&, const {anonymous}::Arguments&)’ defined but not used [-Wunused-function]
   59 |     std::ostream& operator<<(std::ostream& os, const Arguments& arguments)
      |                   ^~~~~~~~

To Reproduce Steps to reproduce the behavior:

Install bear, spdlog and fmt from source using cmake

Expected behavior

To be able to build and install bear from source using CMake.

Environment:

• OS name: Linux
• OS version: Arch Linux
• OS architecture:x86_64
• Bear install method: github

Additional context

• cmake and ninja (cmake -B build -G Ninja && cmake --build build)

Before you send...

• Have you read the README.md file or man bear? yes
• Have you looked what other open issues Bear has? yes
• Are you sure that the build works without Bear? yes

(no where in the issues or readme does it mention anytime about these specific errors)

[theoparis]

The reason I can't use arch linux's spdlog package is due to this:

bear: symbol lookup error: /usr/lib/libspdlog.so.1: undefined symbol: _ZN3fmt2v86detail14snprintf_floatIdEEiT_iNS1_11float_specsERNS1_6bufferIcEE

[rizsotto]

Hey @theoparis , thanks for the report.

One of the CI job is building Bear without the dependencies installed from pacakges. (See this for example.) The trick is that you don't build the dependencies, but allow Bear to build it for itself.

Since I can't reproduce this, I am closing the ticket.