+AC_MSG_CHECKING([for build environment])
+case "$target_alias" in
+*-mingw*) BUILDENV=WIN32;;
+*-cygwin*) BUILDENV=WIN32;;
+*) BUILDENV=UNIX;;
+esac
+AC_MSG_RESULT($BUILDENV)
+AC_SUBST(BUILDENV)
+AM_CONDITIONAL(ENABLE_WIN32, test "$BUILDENV" == "WIN32")
+AM_CONDITIONAL(DISABLE_WIN32, test "$BUILDENV" != "WIN32")
+
+AC_C_BIGENDIAN(AC_DEFINE(RFID_BIG_ENDIAN_BITFIELD, 1, [Big-endian bitfield]),,)
+