all: more minor cleanups

src/options.h

@@ -134,6 +134,9 @@ struct Options final {
     struct {
         bool split_segments;
     } atari_tos;
+    struct {
+        bool force_macos; // undocumented temporary option until we fix macOS 13+ support
+    } darwin_macho;
     struct {
         bool coff;
     } djgpp2_coff;