Cross-compiled windows binary won't work because of missing libstdc++-6.dll

[hannobraun]

I'm working on a project that has spirv_cross in its dependency tree. Everything's fine on my Linux machine, but when I try to cross-compile a Windows executable, it can't be executed because libstdc++-6.dll is missing. I was able to verify this under Linux using Wine.

The problem can be reproduced easily using the example in this repository:

cargo install cross
cross build --package examples --bin glsl --target=x86_64-pc-windows-gnu
wine target/x86_64-pc-windows-gnu/debug/glsl.exe

This results in the following error message on my machine:

002b:err:module:import_dll Library libstdc++-6.dll (which is needed by L"Z:\\home\\hanno\\Projects\\vndf\\vendor\\spirv_cross\\target\\x86_64-pc-windows-gnu\\debug\\glsl.exe") not found
002b:err:module:LdrInitializeThunk Importing dlls for L"Z:\\home\\hanno\\Projects\\vndf\\vendor\\spirv_cross\\target\\x86_64-pc-windows-gnu\\debug\\glsl.exe" failed, status c0000135

This matches the report from a user testing on Windows.

I tried fixing this, but was not successful. I found a Stack Overflow answer that says to link statically. I tried adding the following the build.rs, but it made no difference:

build.flag("-static-libstdc++");

No idea how to proceed, as I'm barely familiar with C++, Windows, or cross-compiling.

[grovesNL]

Hi @hannobraun! I think we could probably consider this a duplicate of #112

Were you able to work around this successfully? It looks like the linked issue was able to work around it by avoiding cross-compilation.

[hannobraun]

Thanks for looking into this, @grovesNL! Indeed it looks like this is probably a duplicate of #112. I'm going to close.

And yes, this is no longer a problem for me downstream. I'm now compiling my binaries directly on Windows (using GitHub Actions), so cross-compiling is no longer required for me.

[grovesNL]

Ok great :)