# Assume i586 by default.
SET(NV_SYSTEM_PROCESSOR "i586")

IF(UNIX)
	FIND_PROGRAM(CMAKE_UNAME uname /bin /usr/bin /usr/local/bin )
	IF(CMAKE_UNAME)
		EXEC_PROGRAM(uname ARGS -p OUTPUT_VARIABLE NV_SYSTEM_PROCESSOR RETURN_VALUE val)

		IF("${val}" GREATER 0 OR NV_SYSTEM_PROCESSOR STREQUAL "unknown")
			EXEC_PROGRAM(uname ARGS -m OUTPUT_VARIABLE NV_SYSTEM_PROCESSOR RETURN_VALUE val)
		ENDIF("${val}" GREATER 0 OR NV_SYSTEM_PROCESSOR STREQUAL "unknown")

		# processor may have double quote in the name, and that needs to be removed
		STRING(REGEX REPLACE "\"" "" NV_SYSTEM_PROCESSOR "${NV_SYSTEM_PROCESSOR}")
		STRING(REGEX REPLACE "/" "_" NV_SYSTEM_PROCESSOR "${NV_SYSTEM_PROCESSOR}")
	ENDIF(CMAKE_UNAME)

	# Get extended processor information with:
	# `cat /proc/cpuinfo`

ELSE(UNIX)
  IF(WIN32)
    # It's not OK to trust $ENV{PROCESSOR_ARCHITECTURE}: its value depends on the type of executable being run,
	# so a 32-bit cmake (the default binary distribution) will always say "x86" regardless of the actual target.
	IF (CMAKE_SIZEOF_VOID_P EQUAL 8)
      SET (NV_SYSTEM_PROCESSOR "AMD64")
	ELSE(CMAKE_SIZEOF_VOID_P EQUAL 8)
	  SET (NV_SYSTEM_PROCESSOR "x86")
	ENDIF(CMAKE_SIZEOF_VOID_P EQUAL 8)
  ENDIF(WIN32)
ENDIF(UNIX)