--with-libz and --without-libz are now supported

dnl Default to compiler & linker defaults for SSL files & libraries.

OPT_SSL=off

AC_ARG_WITH(ssl,dnl

[  --with-ssl[=DIR]        where to look for SSL [compiler/linker default paths]

                          DIR points to the SSL installation [/usr/local/ssl]],

  OPT_SSL=$withval

)

AC_HELP_STRING([--with-ssl=PATH], [where to look for SSL, PATH points to the SSL installation (default: /usr/local/ssl)])

AC_HELP_STRING([--without-ssl], [disable SSL]),

  OPT_SSL=$withval)

if test X"$OPT_SSL" = Xno

then

dnl Check for the presence of ZLIB libraries and headers

dnl **********************************************************************

dnl Default to compiler & linker defaults for files & libraries.

dnl OPT_ZLIB=no

dnl AC_ARG_WITH(zlib,dnl

dnl [  --with-zlib[=DIR]  where to look for ZLIB [compiler/linker default paths]

dnl                      DIR points to the ZLIB installation prefix [/usr/local]],

dnl  OPT_ZLIB=$withval,

dnl )

dnl Check for & handle argument to --with-zlib.

dnl

dnl NOTE:  We *always* look for ZLIB headers & libraries, all this option

dnl        does is change where we look (by adjusting LIBS and CPPFLAGS.)

dnl

AC_MSG_CHECKING(where to look for ZLIB)

if test X"$OPT_ZLIB" = Xno

OPT_ZLIB="yes"

AC_ARG_WITH(libz,

AC_HELP_STRING([--with-libz=PATH], [where to look for zlib])

AC_HELP_STRING([--without-libz], [disable zlib]),

              [ OPT_ZLIB="$withval" ])

if test -n "$OPT_ZLIB"

then

	AC_MSG_RESULT([defaults (or given in environment)])

else

  if test X"$OPT_ZLIB" != Xno

  then

    AC_MSG_CHECKING(for zlib in)

    test X"$OPT_ZLIB" = Xyes && OPT_ZLIB=/usr/local

    LIBS="$LIBS -L$OPT_ZLIB/lib"

    CPPFLAGS="$CPPFLAGS -I$OPT_ZLIB/include"

    AC_MSG_RESULT([$OPT_ZLIB])

  fi

fi

dnl AC_CHECK_FUNC(gzread, , AC_CHECK_LIB(z, gzread))

if test X"$OPT_ZLIB" != Xno

then

  AC_CHECK_LIB(z, gzread, [AM_CONDITIONAL(CONTENT_ENCODING, true) 

	  	          AC_DEFINE(HAVE_LIBZ)

			  LIBS="$LIBS -lz"

                          HAVE_LIBZ="1"

                          AC_SUBST(HAVE_LIBZ)])

else

  AC_MSG_WARN([zlib usage deliberately disabled])

fi

dnl Default is to try the thread-safe versions of a few functions

OPT_THREAD=on