Zig C++ SFML compiler error

[Renan2010]

Zig Version

0.15.0-dev.1092+d772c0627

Steps to Reproduce and Observed Behavior

I was testing zig's C/C++ compiler and came across this while testing SFML compiling with zig c++

[renan@archlinux src]$ zig c++ main.cpp -lsfml-graphics -lsfml-window -lsfml-system
ld.lld: error: undefined symbol: sf::String::String(char const*, std::__1::locale const&)
>>> referenced by main.cpp:4
>>>               /home/renan/.cache/zig/o/2ad3e6bad8e90685910a7784ec2a6749/main.o:(main)

main.cpp

#include <SFML/Graphics.hpp>

int main() {
  sf::RenderWindow window(sf::VideoMode({800, 600}), "SFML window");

  while (const std::optional event = window.pollEvent()) {
    if (event->is<sf::Event::Closed>())
      window.close();
    window.clear();
    window.display();
  }
}

But if it is in g++ it compiles normally and in clang++ it also compiles normally

Expected Behavior

[renan@archlinux src]$ g++ main.cpp -lsfml-graphics -lsfml-window -lsfml-system
[renan@archlinux src]$

[rohlem]

Not sure if that's the issue, but you could retry with explicitly linking to the C++ standard library by adding -lc++ to the invocation flags.
The zig c and zig c++ commands try to create as minimal and self-contained builds as possible, I think requiring the flag may be intended behavior.

[Renan2010]

[renan@archlinux src]$ zig c++ main.cpp -lsfml-graphics -lsfml-window -lsfml-system -lc++
ld.lld: error: undefined symbol: sf::String::String(char const*, std::__1::locale const&)
>>> referenced by main.cpp:4
>>>               /home/renan/.cache/zig/o/2ad3e6bad8e90685910a7784ec2a6749/main.o:(main)

The problem still remains

[Renan2010]

I even tried using pkg-config but the problem still persists

[renan@archlinux src]$ pkg-config -cflags --libs sfml-all
-I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/harfbuzz -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include -I/usr/include/sysprof-6 -pthread -L/usr/ -lsfml-graphics -lsfml-window -lsfml-audio -lsfml-network -lsfml-system
[renan@archlinux src]$ zig c++ main.cpp $(pkg-config -cflags --libs sfml-all)
ld.lld: error: undefined symbol: sf::String::String(char const*, std::__1::locale const&)
>>> referenced by main.cpp:4
>>>               /home/renan/.cache/zig/o/f392d8bf54ad46c272abc3e112e9b63d/main.o:(main)
[renan@archlinux src]$

[rohlem]

Hmm, since you wrote that clang++ with the same flags doesn't encounter that issue, I don't think it's due to name mangling differences between C++ compilers/toolchains.
Maybe someone in one of the community spaces could help you dissect/reduce the issue.
(People might still chime in to help on this issue tracker as well, but it might be less active.)