diff --git a/fortran/Makefile.in b/fortran/Makefile.in
index ef50799c2c..3fccad8c0e 100644
--- a/fortran/Makefile.in
+++ b/fortran/Makefile.in
@@ -1,10 +1,17 @@
 ## Top-level HDF5-Fortran Makefile(.in)
 ##
-## Copyright (C) 2000, 2001
-##    National Center for Supercomputing Applications
-##    All rights reserved.
+## Copyright by the Board of Trustees of the University of Illinois.
+## All rights reserved.
+##
+## This file is part of HDF5.  The full HDF5 copyright notice, including
+## terms governing use, modification, and redistribution, is contained in
+## the files COPYING and Copyright.html.  COPYING can be found at the root
+## of the source code distribution tree; Copyright.html can be found at the
+## root level of an installed copy of the electronic HDF5 document set and
+## is linked from the top-level documents page.  It can also be found at
+## http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html.  If you do not have
+## access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu.
 ##
-## 
 ## This makefile mostly just reinvokes make in the various subdirectories
 ## but does so in the correct order.  You can alternatively invoke make from
 ## each subdirectory manually.
@@ -72,7 +79,7 @@ lib progs check test _test uninstall:
 	done
 
 tests TAGS dep depend:
-	@@SETX@; for d in $(SUBDIRS) examples; do			      \
+	@@SETX@; for d in $(SUBDIRS); do			       	      \
 	   (cd $$d && $(MAKE) $@) || exit 1;				      \
 	done
 
diff --git a/fortran/configure b/fortran/configure
index 9da24ce1b0..bc81930b5c 100755
--- a/fortran/configure
+++ b/fortran/configure
@@ -1008,7 +1008,10 @@ Optional Packages:
   --without-PACKAGE       do not use PACKAGE (same as --with-PACKAGE=no)
   --with-gnu-ld           assume the C compiler uses GNU ld default=no
   --with-pic              try to use only PIC/non-PIC objects default=use both
-  --with-zlib=DIR         Use GNU zlib compression [default=yes]
+  --with-zlib=DIR         Use zlib library for external deflate I/O filter
+                          [default=yes]
+  --with-szlib=DIR        Use szlib library for external szlib I/O filter
+                          [default=yes]
 
 Some influential environment variables:
   CC          C compiler command
@@ -3885,7 +3888,7 @@ test "x$enable_libtool_lock" != xno && enable_libtool_lock=yes
 case $host in
 *-*-irix6*)
   # Find out which ABI we are using.
-  echo '#line 3888 "configure"' > conftest.$ac_ext
+  echo '#line 3891 "configure"' > conftest.$ac_ext
   if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
@@ -4426,7 +4429,7 @@ chmod -w .
 save_CFLAGS="$CFLAGS"
 CFLAGS="$CFLAGS -o out/conftest2.$ac_objext"
 compiler_c_o=no
-if { (eval echo configure:4429: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>out/conftest.err; } && test -s out/conftest2.$ac_objext; then
+if { (eval echo configure:4432: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>out/conftest.err; } && test -s out/conftest2.$ac_objext; then
   # The compiler can only warn and ignore the option if not recognized
   # So say no if there are warnings
   if test -s out/conftest.err; then
@@ -6237,7 +6240,7 @@ else
     lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 6240 "configure"
+#line 6243 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -6335,7 +6338,7 @@ else
     lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 6338 "configure"
+#line 6341 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -8161,6 +8164,446 @@ _ACEOF
 fi
 
 
+# Check whether --with-szlib or --without-szlib was given.
+if test "${with_szlib+set}" = set; then
+  withval="$with_szlib"
+
+else
+  withval=yes
+fi;
+
+case $withval in
+  yes)
+    HAVE_SZLIB="yes"
+
+for ac_header in szlib.h
+do
+as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh`
+if eval "test \"\${$as_ac_Header+set}\" = set"; then
+  echo "$as_me:$LINENO: checking for $ac_header" >&5
+echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
+if eval "test \"\${$as_ac_Header+set}\" = set"; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+fi
+echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5
+echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6
+else
+  # Is the header compilable?
+echo "$as_me:$LINENO: checking $ac_header usability" >&5
+echo $ECHO_N "checking $ac_header usability... $ECHO_C" >&6
+cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+#include "confdefs.h"
+$ac_includes_default
+#include <$ac_header>
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_header_compiler=yes
+else
+  echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+ac_header_compiler=no
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+echo "$as_me:$LINENO: result: $ac_header_compiler" >&5
+echo "${ECHO_T}$ac_header_compiler" >&6
+
+# Is the header present?
+echo "$as_me:$LINENO: checking $ac_header presence" >&5
+echo $ECHO_N "checking $ac_header presence... $ECHO_C" >&6
+cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+#include "confdefs.h"
+#include <$ac_header>
+_ACEOF
+if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
+  (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
+  ac_status=$?
+  egrep -v '^ *\+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } >/dev/null; then
+  if test -s conftest.err; then
+    ac_cpp_err=$ac_c_preproc_warn_flag
+  else
+    ac_cpp_err=
+  fi
+else
+  ac_cpp_err=yes
+fi
+if test -z "$ac_cpp_err"; then
+  ac_header_preproc=yes
+else
+  echo "$as_me: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  ac_header_preproc=no
+fi
+rm -f conftest.err conftest.$ac_ext
+echo "$as_me:$LINENO: result: $ac_header_preproc" >&5
+echo "${ECHO_T}$ac_header_preproc" >&6
+
+# So?  What about this header?
+case $ac_header_compiler:$ac_header_preproc in
+  yes:no )
+    { echo "$as_me:$LINENO: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&5
+echo "$as_me: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&2;}
+    { echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the preprocessor's result" >&5
+echo "$as_me: WARNING: $ac_header: proceeding with the preprocessor's result" >&2;};;
+  no:yes )
+    { echo "$as_me:$LINENO: WARNING: $ac_header: present but cannot be compiled" >&5
+echo "$as_me: WARNING: $ac_header: present but cannot be compiled" >&2;}
+    { echo "$as_me:$LINENO: WARNING: $ac_header: check for missing prerequisite headers?" >&5
+echo "$as_me: WARNING: $ac_header: check for missing prerequisite headers?" >&2;}
+    { echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the preprocessor's result" >&5
+echo "$as_me: WARNING: $ac_header: proceeding with the preprocessor's result" >&2;};;
+esac
+echo "$as_me:$LINENO: checking for $ac_header" >&5
+echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
+if eval "test \"\${$as_ac_Header+set}\" = set"; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  eval "$as_ac_Header=$ac_header_preproc"
+fi
+echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5
+echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6
+
+fi
+if test `eval echo '${'$as_ac_Header'}'` = yes; then
+  cat >>confdefs.h <<_ACEOF
+#define `echo "HAVE_$ac_header" | $as_tr_cpp` 1
+_ACEOF
+ HAVE_SZLIB_H="yes"
+fi
+
+done
+
+
+echo "$as_me:$LINENO: checking for SZ_BufftoBuffCompress in -lsz" >&5
+echo $ECHO_N "checking for SZ_BufftoBuffCompress in -lsz... $ECHO_C" >&6
+if test "${ac_cv_lib_sz_SZ_BufftoBuffCompress+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lsz  $LIBS"
+cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+#include "confdefs.h"
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char SZ_BufftoBuffCompress ();
+#ifdef F77_DUMMY_MAIN
+#  ifdef __cplusplus
+     extern "C"
+#  endif
+   int F77_DUMMY_MAIN() { return 1; }
+#endif
+int
+main ()
+{
+SZ_BufftoBuffCompress ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_lib_sz_SZ_BufftoBuffCompress=yes
+else
+  echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+ac_cv_lib_sz_SZ_BufftoBuffCompress=no
+fi
+rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+echo "$as_me:$LINENO: result: $ac_cv_lib_sz_SZ_BufftoBuffCompress" >&5
+echo "${ECHO_T}$ac_cv_lib_sz_SZ_BufftoBuffCompress" >&6
+if test $ac_cv_lib_sz_SZ_BufftoBuffCompress = yes; then
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBSZ 1
+_ACEOF
+
+  LIBS="-lsz $LIBS"
+
+else
+  unset HAVE_SZLIB
+fi
+
+
+    if test -z "$HAVE_SZLIB" -a -n "$HDF5_CONFIG_ABORT"; then
+      { { echo "$as_me:$LINENO: error: couldn't find szlib library" >&5
+echo "$as_me: error: couldn't find szlib library" >&2;}
+   { (exit 1); exit 1; }; }
+    fi
+    ;;
+  no)
+    HAVE_SZLIB="no"
+    echo "$as_me:$LINENO: checking for szlib" >&5
+echo $ECHO_N "checking for szlib... $ECHO_C" >&6
+    echo "$as_me:$LINENO: result: suppressed" >&5
+echo "${ECHO_T}suppressed" >&6
+    ;;
+  *)
+    HAVE_SZLIB="yes"
+    case "$withval" in
+      *,*)
+        szlib_inc="`echo $withval |cut -f1 -d,`"
+        szlib_lib="`echo $withval |cut -f2 -d, -s`"
+        ;;
+      *)
+        if test -n "$withval"; then
+          szlib_inc="$withval/include"
+          szlib_lib="$withval/lib"
+        fi
+        ;;
+    esac
+
+            if test "X$szlib_inc" = "X/usr/include"; then
+      szlib_inc=""
+    fi
+    if test "X$szlib_lib" = "X/usr/lib"; then
+      szlib_lib=""
+    fi
+
+    saved_CPPFLAGS="$CPPFLAGS"
+    saved_LDFLAGS="$LDFLAGS"
+
+    if test -n "$szlib_inc"; then
+      CPPFLAGS="$CPPFLAGS -I$szlib_inc"
+    fi
+
+
+for ac_header in szlib.h
+do
+as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh`
+if eval "test \"\${$as_ac_Header+set}\" = set"; then
+  echo "$as_me:$LINENO: checking for $ac_header" >&5
+echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
+if eval "test \"\${$as_ac_Header+set}\" = set"; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+fi
+echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5
+echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6
+else
+  # Is the header compilable?
+echo "$as_me:$LINENO: checking $ac_header usability" >&5
+echo $ECHO_N "checking $ac_header usability... $ECHO_C" >&6
+cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+#include "confdefs.h"
+$ac_includes_default
+#include <$ac_header>
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_header_compiler=yes
+else
+  echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+ac_header_compiler=no
+fi
+rm -f conftest.$ac_objext conftest.$ac_ext
+echo "$as_me:$LINENO: result: $ac_header_compiler" >&5
+echo "${ECHO_T}$ac_header_compiler" >&6
+
+# Is the header present?
+echo "$as_me:$LINENO: checking $ac_header presence" >&5
+echo $ECHO_N "checking $ac_header presence... $ECHO_C" >&6
+cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+#include "confdefs.h"
+#include <$ac_header>
+_ACEOF
+if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
+  (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
+  ac_status=$?
+  egrep -v '^ *\+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } >/dev/null; then
+  if test -s conftest.err; then
+    ac_cpp_err=$ac_c_preproc_warn_flag
+  else
+    ac_cpp_err=
+  fi
+else
+  ac_cpp_err=yes
+fi
+if test -z "$ac_cpp_err"; then
+  ac_header_preproc=yes
+else
+  echo "$as_me: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  ac_header_preproc=no
+fi
+rm -f conftest.err conftest.$ac_ext
+echo "$as_me:$LINENO: result: $ac_header_preproc" >&5
+echo "${ECHO_T}$ac_header_preproc" >&6
+
+# So?  What about this header?
+case $ac_header_compiler:$ac_header_preproc in
+  yes:no )
+    { echo "$as_me:$LINENO: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&5
+echo "$as_me: WARNING: $ac_header: accepted by the compiler, rejected by the preprocessor!" >&2;}
+    { echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the preprocessor's result" >&5
+echo "$as_me: WARNING: $ac_header: proceeding with the preprocessor's result" >&2;};;
+  no:yes )
+    { echo "$as_me:$LINENO: WARNING: $ac_header: present but cannot be compiled" >&5
+echo "$as_me: WARNING: $ac_header: present but cannot be compiled" >&2;}
+    { echo "$as_me:$LINENO: WARNING: $ac_header: check for missing prerequisite headers?" >&5
+echo "$as_me: WARNING: $ac_header: check for missing prerequisite headers?" >&2;}
+    { echo "$as_me:$LINENO: WARNING: $ac_header: proceeding with the preprocessor's result" >&5
+echo "$as_me: WARNING: $ac_header: proceeding with the preprocessor's result" >&2;};;
+esac
+echo "$as_me:$LINENO: checking for $ac_header" >&5
+echo $ECHO_N "checking for $ac_header... $ECHO_C" >&6
+if eval "test \"\${$as_ac_Header+set}\" = set"; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  eval "$as_ac_Header=$ac_header_preproc"
+fi
+echo "$as_me:$LINENO: result: `eval echo '${'$as_ac_Header'}'`" >&5
+echo "${ECHO_T}`eval echo '${'$as_ac_Header'}'`" >&6
+
+fi
+if test `eval echo '${'$as_ac_Header'}'` = yes; then
+  cat >>confdefs.h <<_ACEOF
+#define `echo "HAVE_$ac_header" | $as_tr_cpp` 1
+_ACEOF
+ HAVE_SZLIB_H="yes"
+else
+  CPPFLAGS="$saved_CPPFLAGS"
+fi
+
+done
+
+
+    if test -n "$szlib_lib"; then
+      LDFLAGS="$LDFLAGS -L$szlib_lib"
+    fi
+
+
+echo "$as_me:$LINENO: checking for SZ_BufftoBuffCompress in -lsz" >&5
+echo $ECHO_N "checking for SZ_BufftoBuffCompress in -lsz... $ECHO_C" >&6
+if test "${ac_cv_lib_sz_SZ_BufftoBuffCompress+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lsz  $LIBS"
+cat >conftest.$ac_ext <<_ACEOF
+#line $LINENO "configure"
+#include "confdefs.h"
+
+/* Override any gcc2 internal prototype to avoid an error.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+/* We use char because int might match the return type of a gcc2
+   builtin and then its argument prototype would still apply.  */
+char SZ_BufftoBuffCompress ();
+#ifdef F77_DUMMY_MAIN
+#  ifdef __cplusplus
+     extern "C"
+#  endif
+   int F77_DUMMY_MAIN() { return 1; }
+#endif
+int
+main ()
+{
+SZ_BufftoBuffCompress ();
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext conftest$ac_exeext
+if { (eval echo "$as_me:$LINENO: \"$ac_link\"") >&5
+  (eval $ac_link) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+         { ac_try='test -s conftest$ac_exeext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_lib_sz_SZ_BufftoBuffCompress=yes
+else
+  echo "$as_me: failed program was:" >&5
+cat conftest.$ac_ext >&5
+ac_cv_lib_sz_SZ_BufftoBuffCompress=no
+fi
+rm -f conftest.$ac_objext conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+echo "$as_me:$LINENO: result: $ac_cv_lib_sz_SZ_BufftoBuffCompress" >&5
+echo "${ECHO_T}$ac_cv_lib_sz_SZ_BufftoBuffCompress" >&6
+if test $ac_cv_lib_sz_SZ_BufftoBuffCompress = yes; then
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_LIBSZ 1
+_ACEOF
+
+  LIBS="-lsz $LIBS"
+
+else
+  LDFLAGS="$saved_LDFLAGS"; unset HAVE_SZLIB
+fi
+
+
+    if test -z "$HAVE_SZLIB" -a -n "$HDF5_CONFIG_ABORT"; then
+      { { echo "$as_me:$LINENO: error: couldn't find szlib library" >&5
+echo "$as_me: error: couldn't find szlib library" >&2;}
+   { (exit 1); exit 1; }; }
+    fi
+    ;;
+esac
+
+if test "x$HAVE_SZLIB" = "xyes" -a "x$HAVE_SZLIB_H" = "xyes"; then
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_FILTER_SZIP 1
+_ACEOF
+
+fi
+
 
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
diff --git a/fortran/configure.in b/fortran/configure.in
index 423cef7a8b..ac937dac83 100644
--- a/fortran/configure.in
+++ b/fortran/configure.in
@@ -402,7 +402,8 @@ dnl If the library path is specified then it must be preceded by a comma.
 dnl
 AC_ARG_WITH([zlib],
             [AC_HELP_STRING([--with-zlib=DIR],
-                            [Use GNU zlib compression [default=yes]])],,
+                            [Use zlib library for external deflate I/O
+                             filter [default=yes]])],,
             withval=yes)
 
 case $withval in
@@ -475,6 +476,85 @@ if test "x$HAVE_ZLIB" = "xyes" -a "x$HAVE_ZLIB_H" = "xyes" -a "x$HAVE_COMPRESS2"
             [Define if support for deflate filter is enabled])
 fi
 
+dnl ----------------------------------------------------------------------
+dnl Is the szlib present? It has a header file `szlib.h' and a library
+dnl `-lsz' and their locations might be specified with the `--with-szlib'
+dnl command-line switch. The value is an include path and/or a library path.
+dnl If the library path is specified then it must be preceded by a comma.
+dnl
+AC_ARG_WITH([szlib],
+            [AC_HELP_STRING([--with-szlib=DIR],
+                            [Use szlib library for external szlib I/O
+                             filter [default=yes]])],,
+            withval=yes)
+
+case $withval in
+  yes)
+    HAVE_SZLIB="yes"
+    AC_CHECK_HEADERS([szlib.h], [HAVE_SZLIB_H="yes"])
+    AC_CHECK_LIB([sz], [SZ_BufftoBuffCompress],, [unset HAVE_SZLIB])
+
+    if test -z "$HAVE_SZLIB" -a -n "$HDF5_CONFIG_ABORT"; then
+      AC_MSG_ERROR([couldn't find szlib library])
+    fi
+    ;;
+  no)
+    HAVE_SZLIB="no"
+    AC_MSG_CHECKING([for szlib])
+    AC_MSG_RESULT([suppressed])
+    ;;
+  *)
+    HAVE_SZLIB="yes"
+    case "$withval" in
+      *,*)
+        szlib_inc="`echo $withval |cut -f1 -d,`"
+        szlib_lib="`echo $withval |cut -f2 -d, -s`"
+        ;;
+      *)
+        if test -n "$withval"; then
+          szlib_inc="$withval/include"
+          szlib_lib="$withval/lib"
+        fi
+        ;;
+    esac
+
+    dnl Trying to include -I/usr/include and -L/usr/lib is redundant and
+    dnl can mess some compilers up.
+    if test "X$szlib_inc" = "X/usr/include"; then
+      szlib_inc=""
+    fi
+    if test "X$szlib_lib" = "X/usr/lib"; then
+      szlib_lib=""
+    fi
+
+    saved_CPPFLAGS="$CPPFLAGS"
+    saved_LDFLAGS="$LDFLAGS"
+
+    if test -n "$szlib_inc"; then
+      CPPFLAGS="$CPPFLAGS -I$szlib_inc"
+    fi
+
+    AC_CHECK_HEADERS([szlib.h],
+                     [HAVE_SZLIB_H="yes"],
+                     [CPPFLAGS="$saved_CPPFLAGS"])
+
+    if test -n "$szlib_lib"; then
+      LDFLAGS="$LDFLAGS -L$szlib_lib"
+    fi
+
+    AC_CHECK_LIB([sz], [SZ_BufftoBuffCompress],,
+                 [LDFLAGS="$saved_LDFLAGS"; unset HAVE_SZLIB])
+
+    if test -z "$HAVE_SZLIB" -a -n "$HDF5_CONFIG_ABORT"; then
+      AC_MSG_ERROR([couldn't find szlib library])
+    fi
+    ;;
+esac
+
+if test "x$HAVE_SZLIB" = "xyes" -a "x$HAVE_SZLIB_H" = "xyes"; then
+  AC_DEFINE(HAVE_FILTER_SZIP, 1,
+            [Define if support for szip filter is enabled])
+fi
 
 dnl ----------------------------------------------------------------------
 dnl Checks for header files.