makefiles: Build the static libraries directly from the top-level makefile.
diff --git a/configure.ac b/configure.ac
index f07b764..274a6c0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2103,7 +2103,7 @@
 AC_SUBST(ALL_TOP_DIRS,"")
 AC_SUBST(ALL_DLL_DIRS,"")
 AC_SUBST(ALL_TOOL_DIRS,"")
-AC_SUBST(ALL_IMPLIB_DIRS,"")
+AC_SUBST(ALL_STATICLIB_DIRS,"")
 AC_SUBST(ALL_STATIC_LIBS,"")
 AC_SUBST(ALL_IMPORT_LIBS,"")
 AC_SUBST(ALL_IMPORTLIB_RULES,"")