Windows (GNU ABI) builds show up as white canvas only and require extra DLLs

[ChriFo]

When building an example (at least tour and progress_bar) with help of cross for x86_64-pc-windows-gnu and i686-pc-windows-gnu the app looks in Windows 10 running in VMware Fusion like this:

When I build the examples for x86_64-apple-darwin they work on my macOS 11.5 as expected.

The produced exe need some extra DLLs (libstdc++-6.dll + libgcc_s_seh-1.dll for x86_64 or libgcc_s_dw2-1.dll for i686).
I think this comes from a dependency but which one do I have to build by my self to have a fully static build?

Thank you for any help or advice.

[ChriFo]

I used the master branch. But according to this discussion using the current latest release (0.3.0) the progress_bar example worked as expected.

But I still need to add the extra DLLs.

[ChriFo]

With that build.rs

use std::env::var;

fn main() {
    let target = var("TARGET").unwrap();

    println!("cargo:rerun-if-changed=build.rs");
    if target.contains("windows") {
        println!("cargo:rerun-if-env-changed=WINAPI_NO_BUNDLED_LIBRARIES");
        println!("cargo:rerun-if-env-changed=WINAPI_STATIC_NOBUNDLE");

        println!("cargo:rustc-link-lib=static=gcc");
        println!("cargo:rustc-link-lib=static=stdc++");
    }
}

I was able to produce an exe which runs without any extra DLL.

🎉

[0x192]

@ChriFo

I am in the same situation. All iced exemples windows builds ask for extra DLLs and unfortunately I can't statically link stdc++ and gcc :

= note: /usr/lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/ld: /usr/lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/lib/../lib/libstdc++.a(compatibility-condvar.o):/build/mingw-w64-gcc/src/build-x86_64-w64-mingw32/x86_64-w64-mingw32/libstdc++-v3/include/x86_64-w64-mingw32/bits/gthr-default.h:733: undefined reference to `__imp_pthread_mutex_init'
          /usr/lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/bin/ld: /usr/lib/gcc/x86_64-w64-mingw32/11.2.0/../../../../x86_64-w64-mingw32/lib/../lib/libstdc++.a(compatibility-condvar.o):/build/mingw-w64-gcc/src/build-x86_64-w64-mingw32/x86_64-w64-mingw32/libstdc++-v3/include/x86_64-w64-mingw32/bits/gthr-default.h:740: undefined reference to `__imp_pthread_mutex_destroy'
          collect2: error: ld returned 1 exit status

  = help: some `extern` functions couldn't be found; some native libraries may need to be installed or have their path specified
  = note: use the `-l` flag to specify native libraries to link
  = note: use the `cargo:rustc-link-lib` directive to specify the native libraries to link with Cargo (see https://doc.rust-lang.org/cargo/reference/build-scripts.html#cargorustc-link-libkindname)

Did you do anything special? Using cross didn't help either...

@hecrj
Do you know which dependency/(ies) could need stdc++?

P.S. Thanks a lot for all your work on Iced! ❤️

[ChriFo]

No, nothing special but using the cross image for i686-pc-windows-gnu with the exact build.rs shown above.