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Add processor detection and automated optimal compiler option selection.

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This commit is contained in:
castano 2007-08-21 06:32:52 +00:00
parent d6541bbbfa
commit 5f327cebd2
3 changed files with 58 additions and 23 deletions
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27
CMakeLists.txt
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@ -11,17 +11,6 @@ IF(WIN32)
SET(CMAKE_LIBRARY_PATH "${GNUWIN32}/lib")
ENDIF(WIN32)
# In single config builds:
#IF(NOT CMAKE_CONFIGURATION_TYPES)
# IF (CMAKE_BUILD_TYPE MATCHES Debug)
# ADD_DEFINITIONS(-D_DEBUG)
# # ADD_DEFINITIONS(-DDEBUG)
# ENDIF (CMAKE_BUILD_TYPE MATCHES Debug)
#ELSE(NOT CMAKE_CONFIGURATION_TYPES)
# SET(CMAKE_CXX_FLAGS_DEBUG ${CMAKE_CXX_FLAGS_DEBUG} "-D_DEBUG")
# SET(CMAKE_CXX_FLAGS_RELEASE ${CMAKE_CXX_FLAGS_RELEASE} "-DNDEBUG")
#ENDIF(NOT CMAKE_CONFIGURATION_TYPES)
IF(MSVC)
# @@ Some of these might only be available in VC8.
# Code generation flags.
@ -39,18 +28,10 @@ IF(MSVC)
ADD_DEFINITIONS(-D__SSE2__ -D__SSE__ -D__MMX__)
ENDIF(MSVC)
# Set custom gcc options for your system:
IF(CMAKE_COMPILER_IS_GNUCXX)
#SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mfpmath=sse -mtune=i686 -msse3")
#SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=pentium4")
# ibook G4:
#SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mcpu=7450 -mtune=7450 -maltivec -mabi=altivec")
# powerpc:
#SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mcpu=powerpc")
ENDIF(CMAKE_COMPILER_IS_GNUCXX)
INCLUDE(${NV_CMAKE_DIR}/OptimalOptions.cmake)
MESSAGE(STATUS "Setting optimal options")
MESSAGE(STATUS " Processor: ${NV_SYSTEM_PROCESSOR}")
MESSAGE(STATUS " Compiler Flags: ${CMAKE_CXX_FLAGS}")
ADD_SUBDIRECTORY(src)

28
cmake/DetermineProcessor.cmake Normal file
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@ -0,0 +1,28 @@
# 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)

26
cmake/OptimalOptions.cmake Normal file
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@ -0,0 +1,26 @@
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)