--- CMakeLists.txt.orig	2021-10-01 11:36:55 UTC
+++ CMakeLists.txt
@@ -157,7 +157,7 @@ elseif(${CMAKE_SYSTEM_PROCESSOR} STREQUAL "amd64")
   set(ARCH "x86_64")
 elseif(${CMAKE_SYSTEM_PROCESSOR} STREQUAL "AMD64")
   set(ARCH "x86_64")
-elseif(${CMAKE_SYSTEM_PROCESSOR} STREQUAL "ppc64")
+elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(ppc64.*|PPC64.*|powerpc64.*)")
   set(ARCH "ppc64")
 elseif(${CMAKE_SYSTEM_PROCESSOR} STREQUAL "ppc64le")
   set(ARCH "ppc64")