[svn-r6549] Purpose:

This is the first check-in message related to szip support at HDF5 1.6 release

Description:
szip compression support is required by NASA ESDIS. The compression algorithm
is a good compression algorithm for scientific data. In HDF5, we add another filter
function to make szip as a default compression package as we did for gzip(or zlib).

Solution:
In the configure.in and configure, I handled szip exactly the same as what zlib was built into
the HDF5.
Currently if you don't specify in the configure command line with:
./configure --with-szlib=/.....
Unless you put your szip library in your path,you will build the same HDF5 library like before.
Also, I only use static szip library to test with HDF5.

Platforms tested:
Since there are changes of configure.in and configure,I didn't use h5committest.
I tested with four platforms.
1) Linux 2.4 (eirene)
2) Solaris 2.7(arabica)
3) windows 2000(VS 6.0)
4) SGI IRIX6.5-64(modi4)
For test 1)-3), only basic C tests were done
For modi4 test, I tested 64-bit C,parallel and fortran.
ALl tests passed, except a warning message from szip library when checksum is used in some order, which doesn't cause any real problems.

Misc. update:

2 files changed, 541 insertions, 4 deletions

diff --git a/configure b/configure
index 7fa88b2..9f4e9b8 100755
--- a/configure
+++ b/configure
@@ -1041,6 +1041,7 @@ Optional Packages:
 
   --with-dmalloc=DIR      Use dmalloc memory debugging aid [default=no]
   --with-zlib=DIR         Use GNU zlib compression [default=yes]
+  --with-szlib=DIR        Use szlib compression [default=yes]
   --with-pablo=DIR        Use the Pablo library [default=no]
   --with-ssl=LIB          Use the SSL library [default=no]
   --with-gass=DIR         Use the GASS library [default=no]
@@ -4108,7 +4109,7 @@ test "x$enable_libtool_lock" != xno && enable_libtool_lock=yes
 case $host in
 *-*-irix6*)
   # Find out which ABI we are using.
-  echo '#line 4111 "configure"' > conftest.$ac_ext
+  echo '#line 4112 "configure"' > conftest.$ac_ext
   if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
@@ -4649,7 +4650,7 @@ chmod -w .
 save_CFLAGS="$CFLAGS"
 CFLAGS="$CFLAGS -o out/conftest2.$ac_objext"
 compiler_c_o=no
-if { (eval echo configure:4652: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>out/conftest.err; } && test -s out/conftest2.$ac_objext; then
+if { (eval echo configure:4653: \"$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
@@ -6460,7 +6461,7 @@ else
     lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 6463 "configure"
+#line 6464 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -6558,7 +6559,7 @@ else
     lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<EOF
-#line 6561 "configure"
+#line 6562 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -23357,6 +23358,450 @@ _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
+
  PABLO=""
  HAVE_PABLO="no"
 
@@ -32115,3 +32560,6 @@ IF_ENABLED_DISABLED "$THREADSAFE"
 
 PRINT_N "               Zlib-compression"
 IF_YES_NO "$HAVE_ZLIB"
+
+PRINT_N "               SZlib-compression"
+IF_YES_NO "$HAVE_SZLIB"
diff --git a/configure.in b/configure.in
index 94ea925..56fb28b 100644
--- a/configure.in
+++ b/configure.in
@@ -834,6 +834,92 @@ 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 compression [default=yes]])],,
+            withval=yes)
+
+case $withval in
+  yes)
+    HAVE_SZLIB="yes"
+    AC_CHECK_HEADERS([szlib.h], [HAVE_SZLIB_H="yes"])
+    AC_CHECK_LIB([sz], [SZ_BufftoBuffCompress],, [unset HAVE_SZLIB])
+ dnl Not including this function checking for the time being 
+ dnl   AC_CHECK_FUNC([compress2], [HAVE_COMPRESS2="yes"])
+
+    if test -z "$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])
+dnl    AC_CHECK_FUNC([compress2], [HAVE_COMPRESS2="yes"])
+
+    if test -z "$HAVE_SZLIB" -a -n "$HDF5_CONFIG_ABORT"; then
+      AC_MSG_ERROR([couldn't find szlib library])
+    fi
+    ;;
+esac
+
+dnl if test "x$HAVE_ZLIB" = "xyes" -a "x$HAVE_ZLIB_H" = "xyes" -a "x$HAVE_COMPRESS2" = "xyes"; then
+
+  if test "x$HAVE_SZLIB" = "xyes" -a "x$HAVE_SZLIB_H" = "xyes"; then
+
+  AC_DEFINE(HAVE_FILTER_SZIP, 1,
+            [Define if support for szip filter is enabled])
+fi
+
 dnl ----------------------------------------------------------------------
 dnl Pablo Configuration
 dnl
@@ -2365,3 +2451,6 @@ IF_ENABLED_DISABLED "$THREADSAFE"
 
 PRINT_N "               Zlib-compression"
 IF_YES_NO "$HAVE_ZLIB"
+
+PRINT_N "               SZlib-compression"
+IF_YES_NO "$HAVE_SZLIB"