diff --git a/autoconf/acinclude.m4 b/autoconf/acinclude.m4
index 1ac0dd6e04d..ff8a82966df 100644
--- a/autoconf/acinclude.m4
+++ b/autoconf/acinclude.m4
@@ -6079,37 +6079,6 @@ then
 fi
 AC_SUBST(HAVE_FWD_ITERATOR)])
 
-#
-# Check for slist extension.  This is from
-# http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_have_ext_slist.html
-#
-AC_DEFUN([AC_CXX_HAVE_EXT_SLIST],
-[AC_CACHE_CHECK(whether the compiler has ext/slist,
-ac_cv_cxx_have_ext_slist,
-[AC_REQUIRE([AC_CXX_NAMESPACES])
-  AC_LANG_SAVE
-  AC_LANG_CPLUSPLUS
-  AC_TRY_COMPILE([#include <ext/slist>
-#ifdef HAVE_NAMESPACES
-using namespace std;
-#endif],[slist<int> s; return 0;],
-  ac_cv_cxx_have_ext_slist=std, ac_cv_cxx_have_ext_slist=no)
-  AC_TRY_COMPILE([#include <ext/slist>
-#ifdef HAVE_NAMESPACES
-using namespace __gnu_cxx;
-#endif],[slist<int> s; return 0;],
-  ac_cv_cxx_have_ext_slist=gnu, ac_cv_cxx_have_ext_slist=no)
-
-  AC_LANG_RESTORE
-])
-if test "$ac_cv_cxx_have_ext_slist" = std; then
-   AC_DEFINE(HAVE_EXT_SLIST,std,[define if the compiler has ext/slist])
-fi
-if test "$ac_cv_cxx_have_ext_slist" = gnu; then
-   AC_DEFINE(HAVE_EXT_SLIST,gnu,[define if the compiler has ext/slist])
-fi
-])
-
 #
 # Check for FLEX.  This is modified from
 # http://www.gnu.org/software/ac-archive/htmldoc/ac_cxx_namespaces.html
diff --git a/autoconf/configure.ac b/autoconf/configure.ac
index ac7909703ed..6fac355742e 100644
--- a/autoconf/configure.ac
+++ b/autoconf/configure.ac
@@ -250,7 +250,6 @@ AC_C_BIGENDIAN(AC_SUBST([ENDIAN],[big]),AC_SUBST([ENDIAN],[little]))
 dnl Check for C++ extensions
 AC_CXX_HAVE_HASH_MAP
 AC_CXX_HAVE_HASH_SET
-AC_CXX_HAVE_EXT_SLIST
 AC_CXX_HAVE_STD_ITERATOR
 AC_CXX_HAVE_BI_ITERATOR
 AC_CXX_HAVE_FWD_ITERATOR