dnl A function to check if the system's zlib library should be used. The

dnl A function to check if the system's zlib library should be used. The
dnl builtin zlib dnl is used by default unless the user configured with
dnl --with-system-zlib.

AC_DEFUN([AM_ZLIB],
[
# Use the system's zlib library.
zlibdir="-L\$(top_builddir)/../zlib"
zlibinc="-I\$(top_srcdir)/../zlib"
AC_ARG_WITH(system-zlib,
[AS_HELP_STRING([--with-system-zlib], [use installed libz])],
if test x$with_system_zlib = xyes ; then
zlibdir=
zlibinc=
fi
)
AC_SUBST(zlibdir)
AC_SUBST(zlibinc)
])