Update system_check.cmake

Author: martin-frbg

cmake/system_check.cmake

@@ -34,7 +34,6 @@ if(MINGW)
 endif()
 
 # Pretty thorough determination of arch. Add more if needed
-message (STATUS "CMake system processor variable is ${CMAKE_SYSTEM_PROCESSOR}")
 if(CMAKE_CL_64 OR MINGW64)
   if (CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64.*|AARCH64.*|arm64.*|ARM64.*)")
     set(ARM64 1)
@@ -104,6 +103,8 @@ elseif(X86)
   set(ARCH "x86")
 elseif(POWER)
   set(ARCH "power")
+elseif(ZARCH)
+  set(ARCH "zarch")
 elseif(MIPS32)
   set(ARCH "mips")
 elseif(MIPS64)