--- a/host/CMakeLists.txt
+++ b/host/CMakeLists.txt
@@ -162,6 +162,8 @@
     )
 
     add_definitions(-D_CRT_SECURE_NO_WARNINGS)
+elseif(${CMAKE_SYSTEM_NAME} MATCHES "GNU")
+    message(WARNING "Unsupported host operating system: ${CMAKE_SYSTEM_NAME}")
 else()
     message(FATAL_ERROR "Unsupported host operating system: ${CMAKE_SYSTEM_NAME}")
 endif()
