Declare a fallback architecture not yet considered by upstream project.
diff --git a/src/tbb/tools_api/ittnotify_config.h b/src/tbb/tools_api/ittnotify_config.h
index 001d42e0..2e68f738 100644
--- a/src/tbb/tools_api/ittnotify_config.h
+++ b/src/tbb/tools_api/ittnotify_config.h
@@ -180,6 +180,11 @@
# define ITT_ARCH_ARM64 6
#endif /* ITT_ARCH_ARM64 */
+/* Fallback for other architectures */
+#ifndef ITT_ARCH_GENERIC
+# define ITT_ARCH_GENERIC 99
+#endif /* ITT_ARCH_GENERIC */
+
#ifndef ITT_ARCH_LOONGARCH64
# define ITT_ARCH_LOONGARCH64 7
#endif /* ITT_ARCH_LOONGARCH64 */
@@ -209,6 +214,8 @@
# define ITT_ARCH ITT_ARCH_ARM64
# elif defined __powerpc64__
# define ITT_ARCH ITT_ARCH_PPC64
+# elif
+# define ITT_ARCH ITT_ARCH_GENERIC
# elif defined __loongarch__
# define ITT_ARCH ITT_ARCH_LOONGARCH64
# elif defined __s390__ || defined __s390x__