diff --git a/common/zlib/Makefile.am b/common/zlib/Makefile.am
new file mode 100644
index 0000000..5da5a6e
--- /dev/null
+++ b/common/zlib/Makefile.am
@@ -0,0 +1,7 @@
+noinst_LTLIBRARIES = libz.la
+
+libz_la_SOURCES = adler32.c compress.c crc32.c deflate.c deflate.h example.c \
+	gzio.c infblock.c infblock.h infcodes.c infcodes.h inffast.c \
+	inffast.h inffixed.h inflate.c inftrees.c inftrees.h infutil.c \
+	infutil.h maketree.c minigzip.c trees.c trees.h uncompr.c zconf.h \
+	zlib.h zutil.c zutil.h
diff --git a/common/zlib/configure b/common/zlib/configure
index 7c66e10..a19ff2e 100755
--- a/common/zlib/configure
+++ b/common/zlib/configure
@@ -162,9 +162,9 @@
 EOF
 if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
   echo "Checking for errno.h...	 Yes."
+  CFLAGS="$CFLAGS -DHAVE_ERRNO_H"
 else
   echo "Checking for errno.h...	 No."
-  CFLAGS="$CFLAGS -DNO_ERRNO_H"
 fi
 
 cat > $test.c <<EOF
@@ -176,7 +176,7 @@
 }
 EOF
 if test "`($CC -c $CFLAGS $test.c) 2>&1`" = ""; then
-  CFLAGS="$CFLAGS -DUSE_MMAP"
+  CFLAGS="$CFLAGS -DHAVE_MMAP"
   echo Checking for mmap support... Yes.
 else
   echo Checking for mmap support... No.
diff --git a/common/zlib/configure.ac b/common/zlib/configure.ac
new file mode 100644
index 0000000..2befc77
--- /dev/null
+++ b/common/zlib/configure.ac
@@ -0,0 +1,20 @@
+#                                               -*- Autoconf -*-
+# Process this file with autoconf to produce a configure script.
+
+AC_PREREQ([2.61])
+AC_INIT([zlib], [1.1.4])
+AM_INIT_AUTOMAKE([-Wall foreign dist-bzip2])
+
+# Checks for programs.
+AC_PROG_CC
+AC_PROG_LIBTOOL
+
+# Checks for header files.
+AC_CHECK_HEADERS([unistd.h errno.h])
+
+# Checks for library functions.
+AC_FUNC_MMAP
+
+AC_CONFIG_HEADERS([config.h])
+AC_CONFIG_FILES([Makefile])
+AC_OUTPUT
diff --git a/common/zlib/minigzip.c b/common/zlib/minigzip.c
index 8be02bd..4050878 100644
--- a/common/zlib/minigzip.c
+++ b/common/zlib/minigzip.c
@@ -15,6 +15,10 @@
 
 /* @(#) $Id: minigzip.c,v 1.1 2004/10/08 09:44:26 const_k Exp $ */
 
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
 #include <stdio.h>
 #include "zlib.h"
 
@@ -25,7 +29,7 @@
    extern void exit  OF((int));
 #endif
 
-#ifdef USE_MMAP
+#ifdef HAVE_MMAP
 #  include <sys/types.h>
 #  include <sys/mman.h>
 #  include <sys/stat.h>
@@ -75,7 +79,7 @@
 
 void error            OF((const char *msg));
 void gz_compress      OF((FILE   *in, gzFile out));
-#ifdef USE_MMAP
+#ifdef HAVE_MMAP
 int  gz_compress_mmap OF((FILE   *in, gzFile out));
 #endif
 void gz_uncompress    OF((gzFile in, FILE   *out));
@@ -105,7 +109,7 @@
     int len;
     int err;
 
-#ifdef USE_MMAP
+#ifdef HAVE_MMAP
     /* Try first compressing with mmap. If mmap fails (minigzip used in a
      * pipe), use the normal fread loop.
      */
@@ -125,7 +129,7 @@
     if (gzclose(out) != Z_OK) error("failed gzclose");
 }
 
-#ifdef USE_MMAP /* MMAP version, Miguel Albrecht <malbrech@eso.org> */
+#ifdef HAVE_MMAP /* MMAP version, Miguel Albrecht <malbrech@eso.org> */
 
 /* Try compressing the input file at once using mmap. Return Z_OK if
  * if success, Z_ERRNO otherwise.
@@ -160,7 +164,7 @@
     if (gzclose(out) != Z_OK) error("failed gzclose");
     return Z_OK;
 }
-#endif /* USE_MMAP */
+#endif /* HAVE_MMAP */
 
 /* ===========================================================================
  * Uncompress input to output then close both files.
diff --git a/common/zlib/zconf.h b/common/zlib/zconf.h
index c8d6ce9..d1705ae 100644
--- a/common/zlib/zconf.h
+++ b/common/zlib/zconf.h
@@ -8,6 +8,10 @@
 #ifndef _ZCONF_H
 #define _ZCONF_H
 
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
 /*
  * If you *really* need a unique prefix for all types and library functions,
  * compile with -DZ_PREFIX. The "standard" zlib should be compiled without it.
diff --git a/common/zlib/zutil.h b/common/zlib/zutil.h
index 17eb77f..8208498 100644
--- a/common/zlib/zutil.h
+++ b/common/zlib/zutil.h
@@ -13,6 +13,10 @@
 #ifndef _Z_UTIL_H
 #define _Z_UTIL_H
 
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
 #include "zlib.h"
 
 #ifdef STDC
@@ -20,10 +24,10 @@
 #  include <string.h>
 #  include <stdlib.h>
 #endif
-#ifdef NO_ERRNO_H
-    extern int errno;
-#else
+#ifdef HAVE_ERRNO_H
 #   include <errno.h>
+#else
+    extern int errno;
 #endif
 
 #ifndef local