Add processor detection and automated optimal compiler option selection.

cmake/DetermineProcessor.cmake

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+
+# 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)
+    SET (NV_SYSTEM_PROCESSOR "$ENV{PROCESSOR_ARCHITECTURE}")
+  ENDIF(WIN32)
+ENDIF(UNIX)
+
+

cmake/OptimalOptions.cmake

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+
+INCLUDE(${NV_CMAKE_DIR}/DetermineProcessor.cmake)
+
+# Set optimal options for gcc:
+IF(CMAKE_COMPILER_IS_GNUCXX)
+
+	IF(NV_SYSTEM_PROCESSOR STREQUAL "i586")
+		SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=i586")
+	ENDIF(NV_SYSTEM_PROCESSOR STREQUAL "i586")
+
+	IF(NV_SYSTEM_PROCESSOR STREQUAL "i686")
+		SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=i686")
+		#SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mfpmath=sse -mtune=i686 -msse3")
+		#SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=pentium4")
+	ENDIF(NV_SYSTEM_PROCESSOR STREQUAL "i686")
+
+	IF(NV_SYSTEM_PROCESSOR STREQUAL "powerpc")
+		SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mcpu=powerpc -maltivec -mabi=altivec -mpowerpc-gfxopt")
+		
+		# ibook G4:
+		#SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mcpu=7450 -mtune=7450 -maltivec -mabi=altivec -mpowerpc-gfxopt")
+	ENDIF(NV_SYSTEM_PROCESSOR STREQUAL "powerpc")
+
+ENDIF(CMAKE_COMPILER_IS_GNUCXX)
+
+