rc compilation: Do not use addCCArgs to setup .rc preprocessor argv

- Almost all of the args it adds are irrelevant to the .rc preprocessor
- Some of the args it adds are detrimental to the .rc preprocessor, e.g. _DEBUG/NDEBUG should not be defined during .rc preprocessing

Instead, we manually add the few relevant args that addCCArgs would usually handle.

Author: squeek502

src/Compilation.zig

@@ -4542,7 +4542,25 @@ fn updateWin32Resource(comp: *Compilation, win32_resource: *Win32Resource, win32
         });
 
         const out_dep_path = try std.fmt.allocPrint(arena, "{s}.d", .{out_rcpp_path});
-        try comp.addCCArgs(arena, &argv, .rc, out_dep_path);
+        // addCCArgs is not used here because:
+        // - Almost all of the args it adds are irrelevant to the .rc preprocessor
+        // - Some of the args it adds are detrimental to the .rc preprocessor,
+        //   e.g. _DEBUG/NDEBUG should not be defined during .rc preprocessing
+        //
+        // Instead, we manually add the few relevant args that addCCArgs would usually handle.
+        try argv.append("--no-default-config");
+        if (!comp.clang_passthrough_mode) {
+            // Make stderr more easily parseable.
+            try argv.append("-fno-caret-diagnostics");
+        }
+        const llvm_triple = try @import("codegen/llvm.zig").targetTriple(arena, comp.getTarget());
+        try argv.appendSlice(&[_][]const u8{ "-target", llvm_triple });
+        try argv.append("-nostdinc");
+        for (comp.rc_include_dir_list) |include_dir| {
+            try argv.append("-isystem");
+            try argv.append(include_dir);
+        }
+        try argv.appendSlice(&[_][]const u8{ "-MD", "-MV", "-MF", out_dep_path });
 
         if (comp.verbose_cc) {
             dump_argv(argv.items);