1dnl A function to check for zlib availability.  zlib is used by default
2dnl unless the user configured with --disable-nls.
3
4AC_DEFUN([AM_ZLIB],
5[
6  # See if the user specified whether he wants zlib support or not.
7  AC_ARG_WITH(zlib,
8    [  --with-zlib             include zlib support (auto/yes/no) [default=auto]],
9    [], [with_zlib=auto])
10
11  if test "$with_zlib" != "no"; then
12    AC_SEARCH_LIBS(zlibVersion, z, [AC_CHECK_HEADERS(zlib.h)])
13    if test "$with_zlib" = "yes" -a "$ac_cv_header_zlib_h" != "yes"; then
14      AC_MSG_ERROR([zlib (libz) library was explicitly requested but not found])
15    fi
16  fi
17])
18
19