diff -urN zlib-1.2.3.orig/Makefile.am zlib-1.2.3.kasal/Makefile.am
--- zlib-1.2.3.orig/Makefile.am	1970-01-01 01:00:00.000000000 +0100
+++ zlib-1.2.3.kasal/Makefile.am	2009-03-17 17:58:36.000000000 +0100
@@ -0,0 +1,67 @@
+ACLOCAL_AMFLAGS = -I m4 --install
+
+lib_LTLIBRARIES = libz.la
+
+libz_la_SOURCES = \
+	adler32.c \
+	compress.c \
+	crc32.c \
+	crc32.h \
+	gzio.c \
+	uncompr.c \
+	deflate.c \
+	deflate.h \
+	trees.c \
+	trees.h \
+	zutil.c \
+	zutil.h \
+	inflate.c \
+	inflate.h \
+	infback.c \
+	inftrees.c \
+	inftrees.h \
+	inffast.c \
+	inffast.h \
+	infflate.h
+
+# Use -version-number to match the file name used before autoconfiscation.
+libz_la_LDFLAGS = -version-number 1:2:3
+
+include_HEADERS = zlib.h
+nodist_include_HEADERS = zconf.h
+
+dist_man_MANS = zlib.3
+
+## libminizip:
+
+lib_LTLIBRARIES += libminizip.la
+
+libminizip_la_SOURCES = \
+	contrib/minizip/ioapi.c \
+	contrib/minizip/mztools.c \
+	contrib/minizip/unzip.c \
+	contrib/minizip/zip.c
+
+# do not build the static version of libminizip
+libminizip_la_CFLAGS = -shared
+libminizip_la_LDFLAGS = -version-info 1:0:0
+libminizip_la_LIBADD = libz.la
+
+minizip_includedir = $(includedir)/minizip
+minizip_include_HEADERS = \
+	contrib/minizip/crypt.h \
+	contrib/minizip/ioapi.h \
+	contrib/minizip/mztools.h \
+	contrib/minizip/unzip.h \
+	contrib/minizip/zip.h
+
+pkgconfigdir = $(libdir)/pkgconfig
+pkgconfig_DATA = minizip.pc
+
+EXTRA_PROGRAMS = miniunzip minizip
+
+miniunzip_SOURCES = contrib/minizip/miniunz.c
+miniunzip_LDADD = libminizip.la
+
+minizip_SOURCES = contrib/minizip/minizip.c
+minizip_LDADD = libminizip.la
diff -urN zlib-1.2.3.orig/configure.ac zlib-1.2.3.kasal/configure.ac
--- zlib-1.2.3.orig/configure.ac	1970-01-01 01:00:00.000000000 +0100
+++ zlib-1.2.3.kasal/configure.ac	2009-03-17 17:28:41.000000000 +0100
@@ -0,0 +1,13 @@
+#                                               -*- Autoconf -*-
+# Process this file with autoconf to produce a configure script.
+
+AC_INIT([zlib], [1.2.3], [bugzilla.redhat.com])
+AC_CONFIG_SRCDIR([minigzip.c])
+AC_CONFIG_MACRO_DIR([m4])
+AM_INIT_AUTOMAKE([foreign])
+LT_INIT
+
+AC_SUBST([HAVE_UNISTD_H], [0])
+AC_CHECK_HEADER([unistd.h], [HAVE_UNISTD_H=1], [])
+AC_CONFIG_FILES([Makefile minizip.pc zconf.h:zconf.in.h])
+AC_OUTPUT
diff -urN zlib-1.2.3.orig/minizip.pc.in zlib-1.2.3.kasal/minizip.pc.in
--- zlib-1.2.3.orig/minizip.pc.in	1970-01-01 01:00:00.000000000 +0100
+++ zlib-1.2.3.kasal/minizip.pc.in	2009-01-07 15:49:34.000000000 +0100
@@ -0,0 +1,11 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@/minizip
+
+Name: minizip
+Description: Minizip zip file manipulation library
+Requires:
+Version: @PACKAGE_VERSION@
+Libs: -L${libdir} -lminizip -lz
+Cflags: -I${includedir}
diff -urN zlib-1.2.3.orig/zconf.in.h zlib-1.2.3.kasal/zconf.in.h
--- zlib-1.2.3.orig/zconf.in.h	2005-05-28 08:40:35.000000000 +0200
+++ zlib-1.2.3.kasal/zconf.in.h	2009-03-17 17:17:11.000000000 +0100
@@ -284,7 +284,7 @@
    typedef Byte       *voidp;
 #endif
 
-#if 0           /* HAVE_UNISTD_H -- this line is updated by ./configure */
+#if @HAVE_UNISTD_H@           /* HAVE_UNISTD_H -- this line is updated by ./configure */
 #  include <sys/types.h> /* for off_t */
 #  include <unistd.h>    /* for SEEK_* and off_t */
 #  ifdef VMS