2 files changed, 5 insertions, 1 deletions

diff --git a/configure.ac b/configure.ac
index 51e096b..864a4ad 100644
--- a/configure.ac
+++ b/configure.ac
@@ -159,3 +159,7 @@ AM_CONDITIONAL([ENABLE_LIBTLS_ONLY], [test "x$enable_libtls_only" = xyes])
 AC_REQUIRE_AUX_FILE([tap-driver.sh])
 
 AC_OUTPUT
+
+if test "$HOST_OS" = "unsupported"; then
+       AC_MSG_WARN([unsupported platform: $host_os])
+fi
diff --git a/m4/check-os-options.m4 b/m4/check-os-options.m4
index 1f0b7e4..2ef4293 100644
--- a/m4/check-os-options.m4
+++ b/m4/check-os-options.m4
@@ -132,7 +132,7 @@ char buf[1]; getentropy(buf, 1);
                 AC_SUBST([PLATFORM_LDADD], ['-ldl -lmd -lnsl -lsocket'])
                 ;;
         *)
-                HOST_OS=$host_os
+                HOST_OS=unsupported
                 HOST_ABI=elf
                 ;;
 esac