Any idea why the compiler might be failing with messages like these? I'm running v0.3.4 (with Gradle) under Wine. It used to work, with v0.3 I think.

...
C:\users\konan\.konan\kotlin-native-windows-0.3.4\dependencies\msys2-mingw-w64-x86_64-gcc-6.3.0-clang-llvm-3.9.1-windows-x86-64\bin\ld: Dwarf Error: mangled line number section (bad file number).
C:\users\konan\.konan\kotlin-native-windows-0.3.4\dependencies\msys2-mingw-w64-x86_64-gcc-6.3.0-clang-llvm-3.9.1-windows-x86-64\bin\ld: Dwarf Error: Offset (1562511360) greater than or equal to .debug_str size (262582).
...

looks like some Wine issue, hard to tell from this message

It turns out it was due to the linker not being happy with the interop definitions I had copied from the generated files earlier (to be able to pass numeric constants for a LPWSTR parameter). What would be the best way to do that now that we have the platforms klibs? E.g., some win32 functions that take a LPWSTR parameter cleverly allow you to pass either a pointer to a char array (i.e., a string) OR one of several predefined integer constant values; but cinterop treats it as a String parameter, so there is no way to pass the constants. So I'd like to add an overloaded version that takes a LONG value instead (or ideally, in this particular case, a Short).

Maybe autoconverting from String should be disabled for this funtion in windows.def, in

noStringConversion

. Have you full list of problematic functions?

Aha, thanks, I didn't know about noStringConversion. The affected functions would be the ones that are used in conjunction with MAKEINTRESOURCE, I think. LoadIcon and LoadCursor are the ones I ran into. However, reading my Petzold (I'm pretty new to win32), it seems you can actually pass the constants as strings! So it's actually fine in this case. 🙂