-AM_CONDITIONAL(PLATFORM_LINUX, echo x$target_os | grep -q linux)
-AM_CONDITIONAL(PLATFORM_DARWIN, test x$host_darwin = xyes)
-AM_CONDITIONAL(PLATFORM_SIGPOSIX, test x$use_sigposix = xyes)
-AM_CONDITIONAL(PLATFORM_ANDROID, test x$platform_android = xyes)
+AM_CONDITIONAL(HOST_LINUX, echo x$target_os | grep -q linux)
+AM_CONDITIONAL(HOST_DARWIN, test x$host_darwin = xyes)
+AM_CONDITIONAL(HOST_SIGPOSIX, test x$use_sigposix = xyes)
+AM_CONDITIONAL(HOST_ANDROID, test x$platform_android = xyes)