diff --git a/src/Compilation.zig b/src/Compilation.zig index db15eee954..20bd820d10 100644 --- a/src/Compilation.zig +++ b/src/Compilation.zig @@ -2048,7 +2048,14 @@ pub fn create(gpa: Allocator, arena: Allocator, diag: *CreateDiagnostic, options break :s .none; // only LLD can handle ubsan-rt for this target } else true, }; - if (have_zcu and (!need_llvm or use_llvm)) break :s .zcu; + if (have_zcu and (!need_llvm or use_llvm)) { + // ubsan-rt's exports use hidden visibility. If we're building a Windows DLL and + // exported functions are going to be dllexported, LLVM will complain that + // dllexported functions must use default or protected visibility. So we can't use + // the ZCU strategy in this case. + if (options.config.dll_export_fns) break :s .lib; + break :s .zcu; + } if (need_llvm and !build_options.have_llvm) break :s .none; // impossible to build without llvm if (is_exe_or_dyn_lib) break :s .lib; break :s .obj;