AC_ARG_WITH(expat, [ --with-expat=DIR Use Expat in DIR instead of xml2], expat=$withval, expat=maybe)
AC_ARG_WITH(expat_includes, [ --with-expat-includes=DIR Use Expat includes in DIR], expat_includes=$withval, expat_includes=yes)
AC_ARG_WITH(expat_lib, [ --with-expat-lib=DIR Use Expat library in DIR], expat_lib=$withval, expat_lib=yes)
AC_ARG_WITH(expat, [ --with-expat=DIR Use Expat in DIR instead of xml2], expat=$withval, expat=maybe)
AC_ARG_WITH(expat_includes, [ --with-expat-includes=DIR Use Expat includes in DIR], expat_includes=$withval, expat_includes=yes)
AC_ARG_WITH(expat_lib, [ --with-expat-lib=DIR Use Expat library in DIR], expat_lib=$withval, expat_lib=yes)