Bug 18965 – private attribute does not make function private when extern(Windows) attribute is used

If you have multiple functions with the same name in different modules that have the attribute extern(Windows) and are marked as private, it will cause a link error. This also happens with extern(C) linkage simple example with 2 modules: module other; extern(C) private void test() { } module main; extern(C) private void test() { } int main(string[] argv) { test(); return 0; } Error 1: Previous Definition Different : _test this is with dmd v2.080.0 windows x86

This is the correct behavior. extern(C) disables name mangling, extern(Windows) only differs for ABI and slightly with symbol naming. Without name mangling occuring they are the same symbol no matter what module it is in as defined by C compilers.