--- libultrahdr-2.0.2/CMakeLists.txt
+++ libultrahdr-2.0.2/CMakeLists.txt
@@ -55,7 +55,8 @@ elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^
 elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^loongarch64")
   set(ARCH "loong64")
 else()
-  message(FATAL_ERROR "Architecture: ${CMAKE_SYSTEM_PROCESSOR} not recognized")
+  # generic C++ code path for other architectures
+  set(ARCH "${CMAKE_SYSTEM_PROCESSOR}")
 endif()
 
 # Cross compiling on macOS. The cross compiling architecture should override