--- CMakeLists.txt.orig	2019-07-14 02:18:57 UTC
+++ CMakeLists.txt
@@ -49,7 +49,7 @@ elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^arm")
   set(PROCESSOR_IS_ARM TRUE)
 elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^aarch64")
   set(PROCESSOR_IS_AARCH64 TRUE)
-elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "(x86_64)|(AMD64)|(^i.86$)")
+elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "(x86_64)|(AMD64|amd64)|(^i.86$)")
   set(PROCESSOR_IS_X86 TRUE)
 elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(powerpc|ppc)")
   set(PROCESSOR_IS_POWER TRUE)