diff --git a/as400/bndsrc b/as400/bndsrc
deleted file mode 100644
index 98814fd..0000000
--- a/as400/bndsrc
+++ /dev/null
@@ -1,215 +0,0 @@
-STRPGMEXP PGMLVL(*CURRENT) SIGNATURE('ZLIB')
-
-/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
-/*   Version 1.1.3 entry points.                                    */
-/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
-
-/********************************************************************/
-/*   *MODULE      ADLER32      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("adler32")
-
-/********************************************************************/
-/*   *MODULE      COMPRESS     ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("compress")
-  EXPORT SYMBOL("compress2")
-
-/********************************************************************/
-/*   *MODULE      CRC32        ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("crc32")
-  EXPORT SYMBOL("get_crc_table")
-
-/********************************************************************/
-/*   *MODULE      DEFLATE      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("deflate")
-  EXPORT SYMBOL("deflateEnd")
-  EXPORT SYMBOL("deflateSetDictionary")
-  EXPORT SYMBOL("deflateCopy")
-  EXPORT SYMBOL("deflateReset")
-  EXPORT SYMBOL("deflateParams")
-  EXPORT SYMBOL("deflatePrime")
-  EXPORT SYMBOL("deflateInit_")
-  EXPORT SYMBOL("deflateInit2_")
-
-/********************************************************************/
-/*   *MODULE      GZIO         ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("gzopen")
-  EXPORT SYMBOL("gzdopen")
-  EXPORT SYMBOL("gzsetparams")
-  EXPORT SYMBOL("gzread")
-  EXPORT SYMBOL("gzwrite")
-  EXPORT SYMBOL("gzprintf")
-  EXPORT SYMBOL("gzputs")
-  EXPORT SYMBOL("gzgets")
-  EXPORT SYMBOL("gzputc")
-  EXPORT SYMBOL("gzgetc")
-  EXPORT SYMBOL("gzflush")
-  EXPORT SYMBOL("gzseek")
-  EXPORT SYMBOL("gzrewind")
-  EXPORT SYMBOL("gztell")
-  EXPORT SYMBOL("gzeof")
-  EXPORT SYMBOL("gzclose")
-  EXPORT SYMBOL("gzerror")
-
-/********************************************************************/
-/*   *MODULE      INFLATE      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("inflate")
-  EXPORT SYMBOL("inflateEnd")
-  EXPORT SYMBOL("inflateSetDictionary")
-  EXPORT SYMBOL("inflateSync")
-  EXPORT SYMBOL("inflateReset")
-  EXPORT SYMBOL("inflateInit_")
-  EXPORT SYMBOL("inflateInit2_")
-  EXPORT SYMBOL("inflateSyncPoint")
-
-/********************************************************************/
-/*   *MODULE      UNCOMPR      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("uncompress")
-
-/********************************************************************/
-/*   *MODULE      ZUTIL        ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("zlibVersion")
-  EXPORT SYMBOL("zError")
-
-/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
-/*   Version 1.2.1 additional entry points.                         */
-/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
-
-/********************************************************************/
-/*   *MODULE      COMPRESS     ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("compressBound")
-
-/********************************************************************/
-/*   *MODULE      DEFLATE      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("deflateBound")
-
-/********************************************************************/
-/*   *MODULE      GZIO         ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("gzungetc")
-  EXPORT SYMBOL("gzclearerr")
-
-/********************************************************************/
-/*   *MODULE      INFBACK      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("inflateBack")
-  EXPORT SYMBOL("inflateBackEnd")
-  EXPORT SYMBOL("inflateBackInit_")
-
-/********************************************************************/
-/*   *MODULE      INFLATE      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("inflateCopy")
-
-/********************************************************************/
-/*   *MODULE      ZUTIL        ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("zlibCompileFlags")
-
-/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
-/*   Version 1.2.5 additional entry points.                         */
-/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
-
-/********************************************************************/
-/*   *MODULE      ADLER32      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("adler32_combine")
-  EXPORT SYMBOL("adler32_combine64")
-
-/********************************************************************/
-/*   *MODULE      CRC32        ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("crc32_combine")
-  EXPORT SYMBOL("crc32_combine64")
-
-/********************************************************************/
-/*   *MODULE      GZLIB        ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("gzbuffer")
-  EXPORT SYMBOL("gzoffset")
-  EXPORT SYMBOL("gzoffset64")
-  EXPORT SYMBOL("gzopen64")
-  EXPORT SYMBOL("gzseek64")
-  EXPORT SYMBOL("gztell64")
-
-/********************************************************************/
-/*   *MODULE      GZREAD       ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("gzclose_r")
-
-/********************************************************************/
-/*   *MODULE      GZWRITE      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("gzclose_w")
-
-/********************************************************************/
-/*   *MODULE      INFLATE      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("inflateMark")
-  EXPORT SYMBOL("inflatePrime")
-  EXPORT SYMBOL("inflateReset2")
-  EXPORT SYMBOL("inflateUndermine")
-
-/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
-/*   Version 1.2.6 additional entry points.                         */
-/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
-
-/********************************************************************/
-/*   *MODULE      DEFLATE      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("deflateResetKeep")
-  EXPORT SYMBOL("deflatePending")
-
-/********************************************************************/
-/*   *MODULE      GZWRITE      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("gzgetc_")
-
-/********************************************************************/
-/*   *MODULE      INFLATE      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("inflateResetKeep")
-
-/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
-/*   Version 1.2.8 additional entry points.                         */
-/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
-
-/********************************************************************/
-/*   *MODULE      INFLATE      ZLIB         01/02/01  00:15:09      */
-/********************************************************************/
-
-  EXPORT SYMBOL("inflateGetDictionary")
-
-ENDPGMEXP
diff --git a/as400/compile.clp b/as400/compile.clp
deleted file mode 100644
index 83478d0..0000000
--- a/as400/compile.clp
+++ /dev/null
@@ -1,110 +0,0 @@
-/******************************************************************************/
-/*                                                                            */
-/*  ZLIB                                                                      */
-/*                                                                            */
-/*    Compile sources into modules and link them into a service program.      */
-/*                                                                            */
-/******************************************************************************/
-
-             PGM
-
-/*      Configuration adjustable parameters.                                  */
-
-             DCL        VAR(&SRCLIB) TYPE(*CHAR) LEN(10) +
-                          VALUE('ZLIB')                         /* Source library. */
-             DCL        VAR(&SRCFILE) TYPE(*CHAR) LEN(10) +
-                          VALUE('SOURCES')                      /* Source member file. */
-             DCL        VAR(&CTLFILE) TYPE(*CHAR) LEN(10) +
-                          VALUE('TOOLS')                        /* Control member file. */
-
-             DCL        VAR(&MODLIB) TYPE(*CHAR) LEN(10) +
-                          VALUE('ZLIB')                         /* Module library. */
-
-             DCL        VAR(&SRVLIB) TYPE(*CHAR) LEN(10) +
-                          VALUE('LGPL')                         /* Service program library. */
-
-             DCL        VAR(&CFLAGS) TYPE(*CHAR) +
-                          VALUE('OPTIMIZE(40)')                 /* Compile options. */
-
-             DCL        VAR(&TGTRLS) TYPE(*CHAR) +
-                          VALUE('V5R3M0')                       /* Target release. */
-
-
-/*      Working storage.                                                      */
-
-             DCL        VAR(&CMDLEN) TYPE(*DEC) LEN(15 5) VALUE(300)    /* Command length. */
-             DCL        VAR(&CMD) TYPE(*CHAR) LEN(512)
-             DCL        VAR(&FIXDCMD) TYPE(*CHAR) LEN(512)
-
-
-/*      Compile sources into modules.                                         */
-
-             CHGVAR     VAR(&FIXDCMD) VALUE('CRTCMOD' *BCAT &CFLAGS *BCAT      +
-                        'SYSIFCOPT(*IFS64IO)' *BCAT                            +
-                        'DEFINE(''_LARGEFILE64_SOURCE''' *BCAT                 +
-                        '''_LFS64_LARGEFILE=1'') TGTRLS(' *TCAT &TGTRLS *TCAT  +
-                        ') SRCFILE(' *TCAT &SRCLIB *TCAT '/' *TCAT             +
-                        &SRCFILE *TCAT ') MODULE(' *TCAT &MODLIB *TCAT '/')
-
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'ADLER32)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'COMPRESS)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'CRC32)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'DEFLATE)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'GZCLOSE)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'GZLIB)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'GZREAD)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'GZWRITE)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'INFBACK)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'INFFAST)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'INFLATE)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'INFTREES)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'TREES)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'UNCOMPR)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-             CHGVAR     VAR(&CMD) VALUE(&FIXDCMD *TCAT 'ZUTIL)')
-             CALL       PGM(QCMDEXC) PARM(&CMD &CMDLEN)
-
-
-/*      Link modules into a service program.                                  */
-
-             CRTSRVPGM  SRVPGM(&SRVLIB/ZLIB) +
-                          MODULE(&MODLIB/ADLER32     &MODLIB/COMPRESS    +
-                                 &MODLIB/CRC32       &MODLIB/DEFLATE     +
-                                 &MODLIB/GZCLOSE     &MODLIB/GZLIB       +
-                                 &MODLIB/GZREAD      &MODLIB/GZWRITE     +
-                                 &MODLIB/INFBACK     &MODLIB/INFFAST     +
-                                 &MODLIB/INFLATE     &MODLIB/INFTREES    +
-                                 &MODLIB/TREES       &MODLIB/UNCOMPR     +
-                                 &MODLIB/ZUTIL)                          +
-                          SRCFILE(&SRCLIB/&CTLFILE) SRCMBR(BNDSRC)       +
-                          TEXT('ZLIB 1.2.8.1') TGTRLS(&TGTRLS)
-
-             ENDPGM
diff --git a/as400/readme.txt b/as400/readme.txt
deleted file mode 100644
index 77a1720..0000000
--- a/as400/readme.txt
+++ /dev/null
@@ -1,115 +0,0 @@
-        ZLIB version 1.2.8.1 for AS400 installation instructions
-
-I) From an AS400 *SAVF file:
-
-1)      Unpacking archive to an AS400 save file
-
-On the AS400:
-
-_       Create the ZLIB AS400 library:
-
-        CRTLIB LIB(ZLIB) TYPE(*PROD) TEXT('ZLIB compression API library')
-
-_       Create a work save file, for example:
-
-                CRTSAVF FILE(ZLIB/ZLIBSAVF)
-
-On a PC connected to the target AS400:
-
-_       Unpack the save file image to a PC file "ZLIBSAVF"
-_       Upload this file into the save file on the AS400, for example
-                using ftp in BINARY mode.
-
-
-2)      Populating the ZLIB AS400 source library
-
-On the AS400:
-
-_       Extract the saved objects into the ZLIB AS400 library using:
-
-RSTOBJ OBJ(*ALL) SAVLIB(ZLIB) DEV(*SAVF) SAVF(ZLIB/ZLIBSAVF) RSTLIB(ZLIB)
-
-
-3)      Customize installation:
-
-_       Edit CL member ZLIB/TOOLS(COMPILE) and change parameters if needed,
-                according to the comments.
-
-_       Compile this member with:
-
-        CRTCLPGM PGM(ZLIB/COMPILE) SRCFILE(ZLIB/TOOLS) SRCMBR(COMPILE)
-
-
-4)      Compile and generate the service program:
-
-_       This can now be done by executing:
-
-        CALL PGM(ZLIB/COMPILE)
-
-
-
-II) From the original source distribution:
-
-1)      On the AS400, create the source library:
-
-        CRTLIB LIB(ZLIB) TYPE(*PROD) TEXT('ZLIB compression API library')
-
-2)      Create the source files:
-
-        CRTSRCPF FILE(ZLIB/SOURCES) RCDLEN(112) TEXT('ZLIB library modules')
-        CRTSRCPF FILE(ZLIB/H)       RCDLEN(112) TEXT('ZLIB library includes')
-        CRTSRCPF FILE(ZLIB/TOOLS)   RCDLEN(112) TEXT('ZLIB library control utilities')
-
-3)      From the machine hosting the distribution files, upload them (with
-                FTP in text mode, for example) according to the following table:
-
-    Original    AS400   AS400    AS400 AS400
-    file        file    member   type  description
-                SOURCES                Original ZLIB C subprogram sources
-    adler32.c           ADLER32  C     ZLIB - Compute the Adler-32 checksum of a dta strm
-    compress.c          COMPRESS C     ZLIB - Compress a memory buffer
-    crc32.c             CRC32    C     ZLIB - Compute the CRC-32 of a data stream
-    deflate.c           DEFLATE  C     ZLIB - Compress data using the deflation algorithm
-    gzclose.c           GZCLOSE  C     ZLIB - Close .gz files
-    gzlib.c             GZLIB    C     ZLIB - Miscellaneous .gz files IO support
-    gzread.c            GZREAD   C     ZLIB - Read .gz files
-    gzwrite.c           GZWRITE  C     ZLIB - Write .gz files
-    infback.c           INFBACK  C     ZLIB - Inflate using a callback interface
-    inffast.c           INFFAST  C     ZLIB - Fast proc. literals & length/distance pairs
-    inflate.c           INFLATE  C     ZLIB - Interface to inflate modules
-    inftrees.c          INFTREES C     ZLIB - Generate Huffman trees for efficient decode
-    trees.c             TREES    C     ZLIB - Output deflated data using Huffman coding
-    uncompr.c           UNCOMPR  C     ZLIB - Decompress a memory buffer
-    zutil.c             ZUTIL    C     ZLIB - Target dependent utility functions
-                H                      Original ZLIB C and ILE/RPG include files
-    crc32.h             CRC32    C     ZLIB - CRC32 tables
-    deflate.h           DEFLATE  C     ZLIB - Internal compression state
-    gzguts.h            GZGUTS   C     ZLIB - Definitions for the gzclose module
-    inffast.h           INFFAST  C     ZLIB - Header to use inffast.c
-    inffixed.h          INFFIXED C     ZLIB - Table for decoding fixed codes
-    inflate.h           INFLATE  C     ZLIB - Internal inflate state definitions
-    inftrees.h          INFTREES C     ZLIB - Header to use inftrees.c
-    trees.h             TREES    C     ZLIB - Created automatically with -DGEN_TREES_H
-    zconf.h             ZCONF    C     ZLIB - Compression library configuration
-    zlib.h              ZLIB     C     ZLIB - Compression library C user interface
-    as400/zlib.inc      ZLIB.INC RPGLE ZLIB - Compression library ILE RPG user interface
-    zutil.h             ZUTIL    C     ZLIB - Internal interface and configuration
-                TOOLS                  Building source software & AS/400 README
-    as400/bndsrc        BNDSRC         Entry point exportation list
-    as400/compile.clp   COMPILE  CLP   Compile sources & generate service program
-    as400/readme.txt    README   TXT   Installation instructions
-
-4)      Continue as in I)3).
-
-
-
-
-Notes:  For AS400 ILE RPG programmers, a /copy member defining the ZLIB
-                API prototypes for ILE RPG can be found in ZLIB/H(ZLIB.INC).
-                Please read comments in this member for more information.
-
-        Remember that most foreign textual data are ASCII coded: this
-                implementation does not handle conversion from/to ASCII, so
-                text data code conversions must be done explicitely.
-
-        Mainly for the reason above, always open zipped files in binary mode.
diff --git a/os400/README400 b/os400/README400
new file mode 100644
index 0000000..601f1ae
--- /dev/null
+++ b/os400/README400
@@ -0,0 +1,48 @@
+        ZLIB version 1.2.8 for OS/400 installation instructions
+
+1) Download and unpack the zlib tarball to some IFS directory.
+   (i.e.: /path/to/the/zlib/ifs/source/directory)
+
+   If the installed IFS command suppors gzip format, this is straightforward,
+else you have to unpack first to some directory on a system supporting it,
+then move the whole directory to the IFS via the network (via SMB or FTP).
+
+2) Edit the configuration parameters in the compilation script.
+
+        EDTF STMF('/path/to/the/zlib/ifs/source/directory/os400/make.sh')
+
+Tune the parameters according to your needs if not matching the defaults.
+Save the file and exit after edition.
+
+3) Enter qshell, then work in the zlib OS/400 specific directory.
+
+        QSH
+        cd /path/to/the/zlib/ifs/source/directory/os400
+
+4) Compile and install
+
+        sh make.sh
+
+The script will:
+- create the libraries, objects and IFS directories for the zlib environment,
+- compile all modules,
+- create a service program,
+- create a static and a dynamic binding directory,
+- install header files for C/C++ and for ILE/RPG, both for compilation in
+  DB2 and IFS environments.
+
+That's all. 
+
+
+Notes:  For OS/400 ILE RPG programmers, a /copy member defining the ZLIB
+                API prototypes for ILE RPG can be found in ZLIB/H(ZLIB.INC).
+                In the ILE environment, the same definitions are available from
+                file zlib.inc located in the same IFS include directory as the
+                C/C++ header files.
+                Please read comments in this member for more information.
+
+        Remember that most foreign textual data are ASCII coded: this
+                implementation does not handle conversion from/to ASCII, so
+                text data code conversions must be done explicitely.
+
+        Mainly for the reason above, always open zipped files in binary mode.
diff --git a/os400/bndsrc b/os400/bndsrc
new file mode 100644
index 0000000..934d781
--- /dev/null
+++ b/os400/bndsrc
@@ -0,0 +1,100 @@
+STRPGMEXP PGMLVL(*CURRENT) SIGNATURE('ZLIB')
+
+/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
+/*   Version 1.1.3 entry points.                                    */
+/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
+
+  EXPORT SYMBOL("adler32")
+  EXPORT SYMBOL("compress")
+  EXPORT SYMBOL("compress2")
+  EXPORT SYMBOL("crc32")
+  EXPORT SYMBOL("get_crc_table")
+  EXPORT SYMBOL("deflate")
+  EXPORT SYMBOL("deflateEnd")
+  EXPORT SYMBOL("deflateSetDictionary")
+  EXPORT SYMBOL("deflateCopy")
+  EXPORT SYMBOL("deflateReset")
+  EXPORT SYMBOL("deflateParams")
+  EXPORT SYMBOL("deflatePrime")
+  EXPORT SYMBOL("deflateInit_")
+  EXPORT SYMBOL("deflateInit2_")
+  EXPORT SYMBOL("gzopen")
+  EXPORT SYMBOL("gzdopen")
+  EXPORT SYMBOL("gzsetparams")
+  EXPORT SYMBOL("gzread")
+  EXPORT SYMBOL("gzwrite")
+  EXPORT SYMBOL("gzprintf")
+  EXPORT SYMBOL("gzputs")
+  EXPORT SYMBOL("gzgets")
+  EXPORT SYMBOL("gzputc")
+  EXPORT SYMBOL("gzgetc")
+  EXPORT SYMBOL("gzflush")
+  EXPORT SYMBOL("gzseek")
+  EXPORT SYMBOL("gzrewind")
+  EXPORT SYMBOL("gztell")
+  EXPORT SYMBOL("gzeof")
+  EXPORT SYMBOL("gzclose")
+  EXPORT SYMBOL("gzerror")
+  EXPORT SYMBOL("inflate")
+  EXPORT SYMBOL("inflateEnd")
+  EXPORT SYMBOL("inflateSetDictionary")
+  EXPORT SYMBOL("inflateSync")
+  EXPORT SYMBOL("inflateReset")
+  EXPORT SYMBOL("inflateInit_")
+  EXPORT SYMBOL("inflateInit2_")
+  EXPORT SYMBOL("inflateSyncPoint")
+  EXPORT SYMBOL("uncompress")
+  EXPORT SYMBOL("zlibVersion")
+  EXPORT SYMBOL("zError")
+
+/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
+/*   Version 1.2.1 additional entry points.                         */
+/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
+
+  EXPORT SYMBOL("compressBound")
+  EXPORT SYMBOL("deflateBound")
+  EXPORT SYMBOL("gzungetc")
+  EXPORT SYMBOL("gzclearerr")
+  EXPORT SYMBOL("inflateBack")
+  EXPORT SYMBOL("inflateBackEnd")
+  EXPORT SYMBOL("inflateBackInit_")
+  EXPORT SYMBOL("inflateCopy")
+  EXPORT SYMBOL("zlibCompileFlags")
+
+/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
+/*   Version 1.2.5 additional entry points.                         */
+/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
+
+  EXPORT SYMBOL("adler32_combine")
+  EXPORT SYMBOL("adler32_combine64")
+  EXPORT SYMBOL("crc32_combine")
+  EXPORT SYMBOL("crc32_combine64")
+  EXPORT SYMBOL("gzbuffer")
+  EXPORT SYMBOL("gzoffset")
+  EXPORT SYMBOL("gzoffset64")
+  EXPORT SYMBOL("gzopen64")
+  EXPORT SYMBOL("gzseek64")
+  EXPORT SYMBOL("gztell64")
+  EXPORT SYMBOL("gzclose_r")
+  EXPORT SYMBOL("gzclose_w")
+  EXPORT SYMBOL("inflateMark")
+  EXPORT SYMBOL("inflatePrime")
+  EXPORT SYMBOL("inflateReset2")
+  EXPORT SYMBOL("inflateUndermine")
+
+/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
+/*   Version 1.2.6 additional entry points.                         */
+/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
+
+  EXPORT SYMBOL("deflateResetKeep")
+  EXPORT SYMBOL("deflatePending")
+  EXPORT SYMBOL("gzgetc_")
+  EXPORT SYMBOL("inflateResetKeep")
+
+/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
+/*   Version 1.2.8 additional entry points.                         */
+/*@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@*/
+
+  EXPORT SYMBOL("inflateGetDictionary")
+
+ENDPGMEXP
diff --git a/os400/make.sh b/os400/make.sh
new file mode 100644
index 0000000..ddbfb16
--- /dev/null
+++ b/os400/make.sh
@@ -0,0 +1,366 @@
+#!/bin/sh
+#
+#       ZLIB compilation script for the OS/400.
+#
+#
+#       This is a shell script since make is not a standard component of OS/400.
+
+
+################################################################################
+#
+#                       Tunable configuration parameters.
+#
+################################################################################
+
+TARGETLIB='ZLIB'                # Target OS/400 program library
+STATBNDDIR='ZLIB_A'             # Static binding directory.
+DYNBNDDIR='ZLIB'                # Dynamic binding directory.
+SRVPGM="ZLIB"                   # Service program.
+IFSDIR='/zlib'                  # IFS support base directory.
+TGTCCSID='500'                  # Target CCSID of objects
+DEBUG='*NONE'                   # Debug level
+OPTIMIZE='40'                   # Optimisation level
+OUTPUT='*NONE'                  # Compilation output option.
+TGTRLS='V6R1M0'                 # Target OS release
+
+export TARGETLIB STATBNDDIR DYNBNDDIR SRVPGM IFSDIR
+export TGTCCSID DEBUG OPTIMIZE OUTPUT TGTRLS
+
+
+################################################################################
+#
+#                       OS/400 specific definitions.
+#
+################################################################################
+
+LIBIFSNAME="/QSYS.LIB/${TARGETLIB}.LIB"
+
+
+################################################################################
+#
+#                               Procedures.
+#
+################################################################################
+
+#       action_needed dest [src]
+#
+#       dest is an object to build
+#       if specified, src is an object on which dest depends.
+#
+#       exit 0 (succeeds) if some action has to be taken, else 1.
+
+action_needed()
+
+{
+        [ ! -e "${1}" ] && return 0
+        [ "${2}" ] || return 1
+        [ "${1}" -ot "${2}" ] && return 0
+        return 1
+}
+
+
+#       make_module module_name source_name [additional_definitions]
+#
+#       Compile source name into module if needed.
+#       As side effect, append the module name to variable MODULES.
+#       Set LINK to "YES" if the module has been compiled.
+
+make_module()
+
+{
+    MODULES="${MODULES} ${1}"
+    MODIFSNAME="${LIBIFSNAME}/${1}.MODULE"
+    CSRC="`basename \"${2}\"`"
+
+    if action_needed "${MODIFSNAME}" "${2}"
+    then    :
+    elif [ ! "`sed -e \"/<source name=\\\"${CSRC}\\\">/,/<\\\\/source>/!d\" \
+      -e '/<depend /!d'                                                 \
+      -e 's/.* name=\"\\([^\"]*\\)\".*/\\1/' < \"${TOPDIR}/treebuild.xml\" |
+        while read HDR
+        do      if action_needed \"${MODIFSNAME}\" \"${IFSDIR}/include/${HDR}\"
+                then    echo recompile
+                        break
+                fi
+        done`" ]
+    then    return 0
+    fi
+
+    CMD="CRTCMOD MODULE(${TARGETLIB}/${1}) SRCSTMF('${2}')"
+    CMD="${CMD} SYSIFCOPT(*IFS64IO) OPTION(*INCDIRFIRST)"
+    CMD="${CMD} LOCALETYPE(*LOCALE) FLAG(10)"
+    CMD="${CMD} INCDIR('${IFSDIR}/include' ${INCLUDES})"
+    CMD="${CMD} TGTCCSID(${TGTCCSID}) TGTRLS(${TGTRLS})"
+    CMD="${CMD} OUTPUT(${OUTPUT})"
+    CMD="${CMD} OPTIMIZE(${OPTIMIZE})"
+    CMD="${CMD} DBGVIEW(${DEBUG})"
+    system "${CMD}"
+    LINK=YES
+}
+
+
+#       Determine DB2 object name from IFS name.
+
+db2_name()
+
+{
+        basename "${1}"                                                 |
+        tr 'a-z-' 'A-Z_'                                                |
+        sed -e 's/\..*//'                                               \
+            -e 's/^\(.\).*\(.........\)$/\1\2/'
+}
+
+
+#       Force enumeration types to be the same size as integers.
+
+copy_hfile()
+
+{
+        sed -e '1i\
+#pragma enum(int)\
+' "${@}" -e '$a\
+#pragma enum(pop)\
+'
+}
+
+
+################################################################################
+#
+#                             Script initialization.
+#
+################################################################################
+
+SCRIPTDIR=`dirname "${0}"`
+
+case "${SCRIPTDIR}" in
+/*)     ;;
+*)      SCRIPTDIR="`pwd`/${SCRIPTDIR}"
+esac
+
+while true
+do      case "${SCRIPTDIR}" in
+        */.)    SCRIPTDIR="${SCRIPTDIR%/.}";;
+        *)      break;;
+        esac
+done
+
+#  The script directory is supposed to be in ${TOPDIR}/os400.
+
+TOPDIR=`dirname "${SCRIPTDIR}"`
+export SCRIPTDIR TOPDIR
+cd "${TOPDIR}"
+
+
+#  Extract the version from the master compilation XML file.
+
+VERSION=`sed -e '/^<package /!d'                                        \
+            -e 's/^.* version="\([0-9.]*\)".*$/\1/' -e 'q'              \
+            < treebuild.xml`
+export VERSION
+
+################################################################################
+
+
+#       Create the OS/400 library if it does not exist.
+
+if action_needed "${LIBIFSNAME}"
+then    CMD="CRTLIB LIB(${TARGETLIB}) TEXT('ZLIB: Data compression API')"
+        system "${CMD}"
+fi
+
+
+#       Create the DOCS source file if it does not exist.
+
+if action_needed "${LIBIFSNAME}/DOCS.FILE"
+then    CMD="CRTSRCPF FILE(${TARGETLIB}/DOCS) RCDLEN(112)"
+        CMD="${CMD} CCSID(${TGTCCSID}) TEXT('Documentation texts')"
+        system "${CMD}"
+fi
+
+#       Copy some documentation files if needed.
+
+for TEXT in "${TOPDIR}/ChangeLog" "${TOPDIR}/FAQ"                       \
+    "${TOPDIR}/README" "${SCRIPTDIR}/README400"
+do      MEMBER="${LIBIFSNAME}/DOCS.FILE/`db2_name \"${TEXT}\"`.MBR"
+
+        if action_needed "${MEMBER}" "${TEXT}"
+        then    CMD="CPY OBJ('${TEXT}') TOOBJ('${MEMBER}') TOCCSID(${TGTCCSID})"
+                CMD="${CMD} DTAFMT(*TEXT) REPLACE(*YES)"
+                system "${CMD}"
+        fi
+done
+
+
+#       Create the OS/400 source program file for the C header files.
+
+SRCPF="${LIBIFSNAME}/H.FILE"
+
+if action_needed "${SRCPF}"
+then    CMD="CRTSRCPF FILE(${TARGETLIB}/H) RCDLEN(112)"
+        CMD="${CMD} CCSID(${TGTCCSID}) TEXT('ZLIB: C/C++ header files')"
+        system "${CMD}"
+fi
+
+
+#       Create the IFS directory for the C header files.
+
+if action_needed "${IFSDIR}/include"
+then    mkdir -p "${IFSDIR}/include"
+fi
+
+#       Copy the header files to DB2 library. Link from IFS include directory.
+
+for HFILE in "${TOPDIR}/"*.h
+do      DEST="${SRCPF}/`db2_name \"${HFILE}\"`.MBR"
+
+        if action_needed "${DEST}" "${HFILE}"
+        then    copy_hfile < "${HFILE}" > tmphdrfile
+
+                #       Need to translate to target CCSID.
+
+                CMD="CPY OBJ('`pwd`/tmphdrfile') TOOBJ('${DEST}')"
+                CMD="${CMD} TOCCSID(${TGTCCSID}) DTAFMT(*TEXT) REPLACE(*YES)"
+                system "${CMD}"
+                # touch -r "${HFILE}" "${DEST}"
+                rm -f tmphdrfile
+        fi
+
+        IFSFILE="${IFSDIR}/include/`basename \"${HFILE}\"`"
+
+        if action_needed "${IFSFILE}" "${DEST}"
+        then    rm -f "${IFSFILE}"
+                ln -s "${DEST}" "${IFSFILE}"
+        fi
+done
+
+
+#       Install the ILE/RPG header file.
+
+
+HFILE="${SCRIPTDIR}/zlib.inc"
+DEST="${SRCPF}/ZLIB.INC.MBR"
+
+if action_needed "${DEST}" "${HFILE}"
+then    CMD="CPY OBJ('${HFILE}') TOOBJ('${DEST}')"
+        CMD="${CMD} TOCCSID(${TGTCCSID}) DTAFMT(*TEXT) REPLACE(*YES)"
+        system "${CMD}"
+        # touch -r "${HFILE}" "${DEST}"
+fi
+
+IFSFILE="${IFSDIR}/include/`basename \"${HFILE}\"`"
+
+if action_needed "${IFSFILE}" "${DEST}"
+then    rm -f "${IFSFILE}"
+        ln -s "${DEST}" "${IFSFILE}"
+fi
+
+
+#      Create and compile the identification source file.
+
+echo '#pragma comment(user, "ZLIB version '"${VERSION}"'")' > os400.c
+echo '#pragma comment(user, __DATE__)' >> os400.c
+echo '#pragma comment(user, __TIME__)' >> os400.c
+echo '#pragma comment(copyright, "Copyright (C) 1995-2016 Jean-Loup Gailly, Mark Adler. OS/400 version by P. Monnerat.")' >> os400.c
+make_module     OS400           os400.c
+LINK=                           # No need to rebuild service program yet.
+MODULES=
+
+
+#       Get source list.
+
+CSOURCES=`sed -e '/<source name="/!d'                                   \
+    -e 's/.* name="\([^"]*\)".*/\1/' < treebuild.xml`
+
+#       Compile the sources into modules.
+
+for SRC in ${CSOURCES}
+do      MODULE=`db2_name "${SRC}"`
+        make_module "${MODULE}" "${SRC}"
+done
+
+
+#       If needed, (re)create the static binding directory.
+
+if action_needed "${LIBIFSNAME}/${STATBNDDIR}.BNDDIR"
+then    LINK=YES
+fi
+
+if [ "${LINK}" ]
+then    rm -rf "${LIBIFSNAME}/${STATBNDDIR}.BNDDIR"
+        CMD="CRTBNDDIR BNDDIR(${TARGETLIB}/${STATBNDDIR})"
+        CMD="${CMD} TEXT('ZLIB static binding directory')"
+        system "${CMD}"
+
+        for MODULE in ${MODULES}
+        do      CMD="ADDBNDDIRE BNDDIR(${TARGETLIB}/${STATBNDDIR})"
+                CMD="${CMD} OBJ((${TARGETLIB}/${MODULE} *MODULE))"
+                system "${CMD}"
+        done
+fi
+
+
+#       The exportation file for service program creation must be in a DB2
+#               source file, so make sure it exists.
+
+if action_needed "${LIBIFSNAME}/TOOLS.FILE"
+then    CMD="CRTSRCPF FILE(${TARGETLIB}/TOOLS) RCDLEN(112)"
+        CMD="${CMD} CCSID(${TGTCCSID}) TEXT('ZLIB: build tools')"
+        system "${CMD}"
+fi
+
+
+DEST="${LIBIFSNAME}/TOOLS.FILE/BNDSRC.MBR"
+
+if action_needed "${SCRIPTDIR}/bndsrc" "${DEST}"
+then    CMD="CPY OBJ('${SCRIPTDIR}/bndsrc') TOOBJ('${DEST}')"
+        CMD="${CMD} TOCCSID(${TGTCCSID}) DTAFMT(*TEXT) REPLACE(*YES)"
+        system "${CMD}"
+        # touch -r "${SCRIPTDIR}/bndsrc" "${DEST}"
+        LINK=YES
+fi
+
+
+#       Build the service program if needed.
+
+if action_needed "${LIBIFSNAME}/${SRVPGM}.SRVPGM"
+then    LINK=YES
+fi
+
+if [ "${LINK}" ]
+then    CMD="CRTSRVPGM SRVPGM(${TARGETLIB}/${SRVPGM})"
+        CMD="${CMD} SRCFILE(${TARGETLIB}/TOOLS) SRCMBR(BNDSRC)"
+        CMD="${CMD} MODULE(${TARGETLIB}/OS400)"
+        CMD="${CMD} BNDDIR(${TARGETLIB}/${STATBNDDIR})"
+        CMD="${CMD} TEXT('ZLIB ${VERSION} dynamic library')"
+        CMD="${CMD} TGTRLS(${TGTRLS})"
+        system "${CMD}"
+        LINK=YES
+
+        #       Duplicate the service program for a versioned backup.
+
+        BACKUP=`echo "${SRVPGM}${VERSION}"                              |
+                sed -e 's/.*\(..........\)$/\1/' -e 's/\./_/g'`
+        BACKUP="`db2_name \"${BACKUP}\"`"
+        BKUPIFSNAME="${LIBIFSNAME}/${BACKUP}.SRVPGM"
+        rm -f "${BKUPIFSNAME}"
+        CMD="CRTDUPOBJ OBJ(${SRVPGM}) FROMLIB(${TARGETLIB})"
+        CMD="${CMD} OBJTYPE(*SRVPGM) NEWOBJ(${BACKUP})"
+        system "${CMD}"
+fi
+
+
+#       If needed, (re)create the dynamic binding directory.
+
+if action_needed "${LIBIFSNAME}/${DYNBNDDIR}.BNDDIR"
+then    LINK=YES
+fi
+
+if [ "${LINK}" ]
+then    rm -rf "${LIBIFSNAME}/${DYNBNDDIR}.BNDDIR"
+        CMD="CRTBNDDIR BNDDIR(${TARGETLIB}/${DYNBNDDIR})"
+        CMD="${CMD} TEXT('ZLIB dynamic binding directory')"
+        system "${CMD}"
+        CMD="ADDBNDDIRE BNDDIR(${TARGETLIB}/${DYNBNDDIR})"
+        CMD="${CMD} OBJ((*LIBL/${SRVPGM} *SRVPGM))"
+        system "${CMD}"
+fi
diff --git a/as400/zlib.inc b/os400/zlib.inc
similarity index 99%
rename from as400/zlib.inc
rename to os400/zlib.inc
index e6d3397..7341a6d 100644
--- a/as400/zlib.inc
+++ b/os400/zlib.inc
@@ -1,7 +1,7 @@
       *  ZLIB.INC - Interface to the general purpose compression library
       *
       *  ILE RPG400 version by Patrick Monnerat, DATASPHERE.
-      *  Version 1.2.8.1
+      *  Version 1.2.8
       *
       *
       *  WARNING:
@@ -22,14 +22,14 @@
       *
       *  Versioning information.
       *
-     D ZLIB_VERSION    C                   '1.2.8.1'
-     D ZLIB_VERNUM     C                   X'1281'
+     D ZLIB_VERSION    C                   '1.2.8'
+     D ZLIB_VERNUM     C                   X'1280'
      D ZLIB_VER_MAJOR  C                   1
      D ZLIB_VER_MINOR  C                   2
      D ZLIB_VER_REVISION...
      D                 C                   8
      D ZLIB_VER_SUBREVISION...
-     D                 C                   1
+     D                 C                   0
       *
       *  Other equates.
       *