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diff --git a/zlib/configure.ac b/zlib/configure.ac
new file mode 100644
index 00000000..c85f4d50
--- /dev/null
+++ b/zlib/configure.ac
@@ -0,0 +1,123 @@
+dnl Process this with autoconf to create configure
+
+AC_PREREQ(2.59)
+AC_INIT
+AC_CONFIG_SRCDIR([zlib.h])
+
+AM_ENABLE_MULTILIB(, ..)
+
+AC_CANONICAL_SYSTEM
+
+# This works around an automake problem.
+mkinstalldirs="`cd $ac_aux_dir && ${PWDCMD-pwd}`/mkinstalldirs"
+AC_SUBST(mkinstalldirs)
+
+AM_INIT_AUTOMAKE(zlib, 1.1.4)
+
+AM_MAINTAINER_MODE
+
+dnl We use these options to decide which functions to include.
+AC_ARG_WITH(target-subdir,
+[  --with-target-subdir=SUBDIR
+                          configuring in a subdirectory])
+
+if test -z "$with_target_subdir" || test "$with_target_subdir" = "."; then
+   COMPPATH=.
+else
+   COMPPATH=..
+fi
+AC_SUBST(COMPPATH)
+
+AC_ARG_WITH(cross-host,
+[  --with-cross-host=HOST  configuring with a cross compiler])
+
+dnl Default to --enable-multilib
+AC_ARG_ENABLE(multilib,
+[  --enable-multilib       build many library versions (default)],
+[case "${enableval}" in
+  yes) multilib=yes ;;
+  no)  multilib=no ;;
+  *)   AC_MSG_ERROR(bad value ${enableval} for multilib option) ;;
+ esac], [test -z "$with_target_subdir" && multilib=no || multilib=yes])dnl
+
+AC_ARG_WITH(system-zlib,
+[  --with-system-zlib      use installed libz])
+
+# Make sure we don't test executables when making cross-tools.
+GCC_NO_EXECUTABLES
+
+# The same as in boehm-gc and libstdc++. Have to borrow it from there.
+# We must force CC to /not/ be precious variables; otherwise
+# the wrong, non-multilib-adjusted value will be used in multilibs.
+# As a side effect, we have to subst CFLAGS ourselves.
+
+m4_rename([_AC_ARG_VAR_PRECIOUS],[real_PRECIOUS])
+m4_define([_AC_ARG_VAR_PRECIOUS],[])
+AC_PROG_CC
+m4_rename([real_PRECIOUS],[_AC_ARG_VAR_PRECIOUS])
+
+AC_SUBST(CFLAGS)
+
+AC_PROG_LIBTOOL
+
+# Find CPP now so that any conditional tests below won't do it and
+# thereby make the resulting definitions conditional.
+AC_PROG_CPP
+
+if test -n "$with_cross_host"; then
+   # We are being configured with a cross compiler.  AC_REPLACE_FUNCS
+   # may not work correctly, because the compiler may not be able to
+   # link executables.
+
+   # We assume newlib.  This lets us hard-code the functions we know
+   # we'll have.
+   AC_DEFINE(HAVE_MEMCPY)
+   AC_DEFINE(HAVE_STRERROR)
+
+   # We ignore --with-system-zlib in this case.
+   target_all=libzgcj.la
+else
+   AC_FUNC_MMAP
+   AC_CHECK_FUNCS(memcpy strerror)
+
+   if test "$with_system_zlib" = yes; then
+      AC_CHECK_LIB(z, deflate, target_all=, target_all=libzgcj.la)
+   else
+      target_all=libzgcj.la
+   fi
+fi
+
+AC_SUBST(target_all)
+
+AC_CHECK_HEADERS(unistd.h)
+
+if test -n "$with_cross_host" &&
+   test x"$with_cross_host" != x"no"; then
+  toolexecdir='$(exec_prefix)/$(target_alias)'
+  toolexeclibdir='$(toolexecdir)/lib'
+else
+  toolexecdir='$(libdir)/gcc-lib/$(target_alias)'
+  toolexeclibdir='$(libdir)'
+fi
+if test "$GCC" = yes && $CC -print-multi-os-directory > /dev/null 2>&1; then
+  multiosdir=/`$CC -print-multi-os-directory`
+  case $multiosdir in
+    /.) multiosdir= ;; # Avoid trailing /.
+  esac
+else
+  multiosdir=
+fi
+toolexeclibdir=${toolexeclibdir}${multiosdir}
+AC_SUBST(toolexecdir)
+AC_SUBST(toolexeclibdir)
+
+AM_CONDITIONAL(TARGET_LIBRARY, test -n "$with_target_subdir")
+
+if test "${multilib}" = "yes"; then
+  multilib_arg="--enable-multilib"
+else
+  multilib_arg=
+fi
+
+AC_CONFIG_FILES([Makefile])
+AC_OUTPUT