cmake編譯（編譯目標）x86或x64

if(CMAKE_CL_64)    #CMAKE的內建變量，如果是true，就說明編譯器的64位的，自然可以編譯64bit的程序
set(ADDRESS_MODEL 64)
set(NODE_TARGET x64)
else()
set(ADDRESS_MODEL 32)
set(NODE_TARGET x86)
endif()

看以上代碼，判斷下就行了

 

CMAKE_CL_64內建的這個變量，官方文檔給出來的解釋是：

Using the 64 bit compiler from Microsoft

Set to true when using the 64 bit cl compiler from Microsoft.

###############update####################

 

如果是GCC編譯器或者其他的諸如sun Studio之類的，可以設置CFLAGS CXXFLAGS變量，加入-m32 或者-m64來編譯x86或者x64的程序。

如果是windows平台下VS的project文件的話，請使用VS generator，cmake -G "Visual Studio 10 Win64"就是編譯為x64，cmake -G "Visual Studio 10 "就是編譯為x86.

如果是Mac OS X上，使用CMAKE_OSX_ARCHITECTURES這個CMAKE的內建變量。

• cmake -DCMAKE_OSX_ARCHITECTURES=i386 /path/to/source/dir------編譯為32位

  cmake -DCMAKE_OSX_ARCHITECTURES=x86_64 /path/to/source/dir------編譯為64位

  cmake "-DCMAKE_OSX_ARCHITECTURES=x86_64;i386" /path/to/source/dir -------編譯為通用8664架構和i386架構的二進制

 

或者可以用另外一種方式，思路是這樣的，其實編譯為x86或者x64，本質上都是向linker傳遞特定的參數。如果是VS,或者是NMake的Makefiles的話，直接使用CMAKE內建的變量CMAKE_EXE_LINKER_FLAGS,來設置鏈接器的參數。VS toolchain 可以這樣 set(CMAKE_EXE_LINKER_FLAGS "/machine:x86")。

 

這個變量官方給出來的解釋是：

Linker flags to be used to create executables.

These flags will be used by the linker when creating an executable.

 

以下是構建一個console的demo：

SET(PROJECT_NAME dls_test)

PROJECT(${PROJECT_NAME})

CMAKE_MINIMUM_REQUIRED(VERSION 2.8)

#ADD_DEFINITIONS(-DUNICODE -D_UNICODE)
ADD_DEFINITIONS(-D_CONSOLE)


SET(CMAKE_MFC_FLAG 1)  #0: Use Standard Windows Libraries            1: Use MFC in a Static Library        2: Use MFC in a Shared DLL


include_directories(${PROJECT_SOURCE_DIR})
include_directories(${PROJECT_SOURCE_DIR}/../inc)
include_directories(${PROJECT_SOURCE_DIR}/../wlp_adapter)
include_directories(${PROJECT_SOURCE_DIR}/../include)

LINK_DIRECTORIES(${PROJECT_SOURCE_DIR}/../lib)
#LINK_DIRECTORIES(${CMAKE_BINARY_DIR}/lib)

file(GLOB SRC RELATIVE ${CMAKE_CURRENT_SOURCE_DIR}  main.cpp )
source_group("src" FILES ${SRC})

file(GLOB hdrs RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} *.h)
source_group("include" FILES ${hdrs})

ADD_EXECUTABLE(${PROJECT_NAME}  ${SRC} ${hdrs})

if(WIN32)
if(CMAKE_BUILD_TYPE MATCHES "Debug")
  #set(OPENCV_LIB "opencv_core246d.lib" "opencv_highgui246d.lib" "opencv_imgproc246d.lib" IlmImfd.lib Comctl32.lib)
  TARGET_LINK_LIBRARIES(${PROJECT_NAME} wlp_adapter.lib hal.lib cbs.lib libglog_staticd.lib )
else()
    TARGET_LINK_LIBRARIES(${PROJECT_NAME} wlp_adapter.lib hal.lib cbs.lib libglog_static.lib )
endif()


set_target_properties(${PROJECT_NAME} PROPERTIES LINK_FLAGS "/SUBSYSTEM:CONSOLE") 

else()

   TARGET_LINK_LIBRARIES(${PROJECT_NAME} wlp_adapter hal cbs glog  pthread gomp rt glib-2.0 dl GL boost_system boost_filesystem boost_program_options boost_regex)

endif()

if(WIN32)
else()
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}   -std=c++0x  -fPIC ")
endif()
  
set(CompilerFlags
        CMAKE_CXX_FLAGS
        CMAKE_CXX_FLAGS_DEBUG
        CMAKE_CXX_FLAGS_RELEASE
        CMAKE_C_FLAGS
        CMAKE_C_FLAGS_DEBUG
        CMAKE_C_FLAGS_RELEASE
        )
foreach(CompilerFlag ${CompilerFlags})
  string(REPLACE "/MD" "/MT" ${CompilerFlag} "${${CompilerFlag}}")
  string(REPLACE "/Ob0" "" ${CompilerFlag} "${${CompilerFlag}}")
  string(REPLACE "/TC" "" ${CompilerFlag} "${${CompilerFlag}}")
endforeach()


INSTALL(TARGETS ${prj_name}
    RUNTIME DESTINATION bin
    LIBRARY DESTINATION lib
    ARCHIVE DESTINATION lib
)

install(DIRECTORY ${PROJECT_SOURCE_DIR}
    DESTINATION "."
    )

 

 

reference：

http://stackoverflow.com/questions/5334095/cmake-multiarchitecture-compilation

http://blog.csdn.net/wh_xiexing/article/details/18301923

http://www.cmake.org/cmake/help/v3.0/variable/CMAKE_CL_64.html

http://www.cmake.org/cmake/help/v3.0/variable/CMAKE_EXE_LINKER_FLAGS.html