windows: supporting changes for boostrapping via msvc

- add support for passing through .def files to the linker,
  required for building libLTO.dll in LLVM
- fixup libcpp linking conditionals
- add option to skip linking zstd for use in bootstrapping (when
  building against an LLVM with LLVM_ENABLE_ZSTD=OFF)

1 files changed, 7 insertions, 0 deletions

diff --git a/src/link.zig b/src/link.zig
index 0a526db0de..410d1232af 100644
--- a/src/link.zig
+++ b/src/link.zig
@@ -219,6 +219,13 @@ pub const Options = struct {
     /// (Darwin) remove dylibs that are unreachable by the entry point or exported symbols
     dead_strip_dylibs: bool = false,
 
+    /// (Windows) PDB source path prefix to instruct the linker how to resolve relative
+    /// paths when consolidating CodeView streams into a single PDB file.
+    pdb_source_path: ?[]const u8 = null,
+
+    /// (Windows) .def file to specify when linking
+    module_definition_file: ?[] const u8 = null,
+
     pub fn effectiveOutputMode(options: Options) std.builtin.OutputMode {
         return if (options.use_lld) .Obj else options.output_mode;
     }