I am converting a codebase from C++ to Zig. So far, I switched the entry point to Zig and recreate the C++ objects in Zig. The rest in the middle are still (extern "C") C++, i.e. we have a Zig sandwich here.

In order for the C++ code to use the Zig struct, there must be a header file and unfortunately it is also translated to Zig. Thus, this shared module is recognized both as originally declared and .cimport[…].struct_[…] and the (stage 1) compiler yields the error: expected type […], found […]. I made a minimal reproducer here hoping it'll help debugging.

I also noticed that stage 1 compiler has disabled C header emission (GH-6753), was this one of the reasons?