care for <format> unsupported environment?

[jg1uaa]

I tried to build termbench-pro on Debian-12 with clang++-16 and gcc-12.2.0, there is some errors related with std::format like this.

(clang-16)

[ 25%] Building CXX object libtermbench/CMakeFiles/termbench.dir/termbench.cpp.o
cd /home/uaa/termbench-pro/build/libtermbench && /usr/bin/clang++-16 -Dtermbench_EXPORTS -I/home/uaa/termbench-pro -isystem /home/uaa/termbench-pro/build/_deps/glaze-src/include -O2 -g -DNDEBUG -fPIC -Wall -Wduplicate-enum -Wextra -Wfinal-dtor-non-final-class -Wimplicit-fallthrough -Wmissing-declarations -Wnewline-eof -Wno-unknown-attributes -Wno-unknown-pragmas -Wnull-dereference -Wsign-conversion -Wsuggest-destructor-override -pedantic -Wconversion -fdiagnostics-color=always -Werror -Wextra-semi -Wpessimizing-move -Wredundant-move -Qunused-arguments -Wno-missing-braces -std=c++20 -MD -MT libtermbench/CMakeFiles/termbench.dir/termbench.cpp.o -MF CMakeFiles/termbench.dir/termbench.cpp.o.d -o CMakeFiles/termbench.dir/termbench.cpp.o -c /home/uaa/termbench-pro/libtermbench/termbench.cpp
In file included from /home/uaa/termbench-pro/libtermbench/termbench.cpp:14:
/home/uaa/termbench-pro/libtermbench/termbench.h:123:21: error: no member named 'format' in namespace 'std'
        return std::format("{:7.3f} GB", _value / 1024.0 / 1024.0 / 1024.0);
               ~~~~~^
/home/uaa/termbench-pro/libtermbench/termbench.h:125:21: error: no member named 'format' in namespace 'std'
        return std::format("{:7.3f} MB", _value / 1024.0 / 1024.0);
               ~~~~~^
/home/uaa/termbench-pro/libtermbench/termbench.h:127:21: error: no member named 'format' in namespace 'std'
        return std::format("{:7.3f} KB", _value / 1024.0);
               ~~~~~^
/home/uaa/termbench-pro/libtermbench/termbench.h:128:17: error: no member named 'format' in namespace 'std'
    return std::format("{:7.3f} bytes", _value);
           ~~~~~^
/home/uaa/termbench-pro/libtermbench/termbench.cpp:17:10: fatal error: 'format' file not found
#include <format>
         ^~~~~~~~
5 errors generated.

(gcc-12.2.0)

[ 25%] Building CXX object libtermbench/CMakeFiles/termbench.dir/termbench.cpp.o
cd /home/uaa/termbench-pro/build/libtermbench && /usr/bin/c++ -Dtermbench_EXPORTS -I/home/uaa/termbench-pro -isystem /home/uaa/termbench-pro/build/_deps/glaze-src/include -O2 -g -DNDEBUG -fPIC -Wall -Wduplicated-cond -Wextra -Wimplicit-fallthrough -Wlogical-op -Wmissing-declarations -Wno-unknown-pragmas -Wnull-dereference -Wsign-conversion -pedantic -Wconversion -fdiagnostics-color=always -Werror -Wextra-semi -Wpessimizing-move -Wredundant-move -Wno-missing-braces -std=c++20 -MD -MT libtermbench/CMakeFiles/termbench.dir/termbench.cpp.o -MF CMakeFiles/termbench.dir/termbench.cpp.o.d -o CMakeFiles/termbench.dir/termbench.cpp.o -c /home/uaa/termbench-pro/libtermbench/termbench.cpp
/home/uaa/termbench-pro/libtermbench/termbench.cpp:17:10: fatal error: format: そのようなファイルやディレクトリはありません
   17 | #include <format>
      |          ^~~~~~~~
compilation terminated.

I don't know what compiler is required (latest GCC?), but I think using libfmt is better for a while.
(contour-terminal's scripts/install-deps.sh requires termbenchpro and it is used by build.yml, so this problem needs to be fixed for easy-to-add new distros)

[christianparpart]

Hey; seems like you need either GCC 13 or higher or Clang (I thought 17) with libc++17 or higher.

Isn't there anything less old on Debian? Sorry for asking so blind, I'm not a Debian user :)

[Yaraslaut]

Even with clang, everything is compiled against libstdc++, formatting support was added in GCC 13, so you need at least gcc 13 on your system to compile it.
@jg1uaa last release of contour that uses fmt is https://github.com/contour-terminal/contour/releases/tag/v0.5.0.7168 but please note that you need fmt version lower than 11