-# Handle --enable-gold.
-# --enable-gold Build only gold
-# --disable-gold [default] Build only ld
-# --enable-gold=both Build both gold and ld, ld is default
-# --enable-gold=both/ld Same
-# --enable-gold=both/gold Build both gold and ld, gold is default, ld is renamed ld.bfd
-
+# Handle --enable-gold, --enable-ld.
+# --disable-gold [--enable-ld]
+# Build only ld. Default option.
+# --enable-gold[=default] [--enable-ld]
+# Build both gold and ld. Install gold as "ld.gold" and "ld",
+# install ld as "ld.bfd".
+# --enable-gold[=default] --disable-ld
+# Build only gold, which is then installed as both "ld.gold" and "ld".
+# --enable-gold --enable-ld=default
+# Build both gold (installed as "gold") and ld (installed as "ld").
+# In other words, ld is default
+# --enable-gold=default --enable-ld=default
+# Error.
+
+default_ld=