diff --git a/collects/compiler/sig.ss b/collects/compiler/sig.ss
index 1cab9f0cd0..b8f638779f 100644
--- a/collects/compiler/sig.ss
+++ b/collects/compiler/sig.ss
@@ -5,8 +5,7 @@
 
   (provide compiler:option^
 	   compiler^
-	   compiler:inner^
-	   compiler:linker^)
+	   compiler:inner^)
 
   ;; Compiler options
   (define-signature compiler:option^
@@ -75,20 +74,9 @@
      compile-extensions-to-c
      compile-c-extensions
 
-     compile-extension-parts
-     compile-extension-parts-to-c
-     compile-c-extension-parts
-
-     link-extension-parts
-     glue-extension-parts
-     glue-extension-parts-to-c
-
      compile-zos
 
-     compile-collection-extension
      compile-collection-zos
-
-     compile-directory-extension
      compile-directory-zos
  
      current-compiler-dynamic-require-wrapper
@@ -99,13 +87,4 @@
     (compile-extension
      compile-extension-to-c
      compile-c-extension
-     compile-extension-part
-     compile-extension-part-to-c
-     compile-c-extension-part
-     eval-compile-prefix))
-  
-  ;; Low-level multi-file extension linker interface
-  (define-signature compiler:linker^
-    (link-extension
-     glue-extension
-     glue-extension-source)))
+     eval-compile-prefix)))
diff --git a/collects/setup/option-sig.ss b/collects/setup/option-sig.ss
index 89e69d5124..12a1a7a12f 100644
--- a/collects/setup/option-sig.ss
+++ b/collects/setup/option-sig.ss
@@ -11,7 +11,6 @@
      clean
      compile-mode
      make-zo
-     make-so
      make-info-domain
      make-launchers
      make-docs