2 files changed, 8 insertions, 2 deletions

diff --git a/configure.ac b/configure.ac
index 51e096b..87a80cc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -32,6 +32,10 @@ LT_INIT([pic-only])
 
 CHECK_OS_OPTIONS
 
+if test "$HOST_OS" = "unsupported"; then
+        AC_MSG_ERROR([unsupported platform: $host_os])
+fi
+
 CHECK_C_HARDENING_OPTIONS
 
 DISABLE_AS_EXECUTABLE_STACK
diff --git a/m4/check-os-options.m4 b/m4/check-os-options.m4
index 77edd14..a8c4904 100644
--- a/m4/check-os-options.m4
+++ b/m4/check-os-options.m4
@@ -109,7 +109,7 @@ char buf[1]; getentropy(buf, 1);
                 )
                 CPPFLAGS="$CPPFLAGS -D_OPENBSD_SOURCE"
                 ;;
-        *openbsd* | *bitrig*)
+        *openbsd*)
                 HOST_OS=openbsd
                 HOST_ABI=elf
                 AC_DEFINE([HAVE_ATTRIBUTE__BOUNDED__], [1], [OpenBSD gcc has bounded])
@@ -131,7 +131,9 @@ char buf[1]; getentropy(buf, 1);
                 CPPFLAGS="$CPPFLAGS -D__EXTENSIONS__ -D_XOPEN_SOURCE=600 -DBSD_COMP"
                 AC_SUBST([PLATFORM_LDADD], ['-ldl -lmd -lnsl -lsocket'])
                 ;;
-        *) ;;
+        *)
+                HOST_OS=unsupported
+                ;;
 esac
 
 # Check if time_t is sized correctly