2023年12月11日发(作者：)

cmake编译（编译目标）x86或x64

if(CMAKE_CL_64) #CMAKE的内建变量，如果是true，就说明编译器的64位的，自然可以编译64bit的程序

set(ADDRESS_MODEL 64)

set(NODE_TARGET x64)

else()

set(ADDRESS_MODEL 32)

set(NODE_TARGET x86)

endif()

看以上代码，判断下就行了

CMAKE_CL_64内建的这个变量，官方文档给出来的解释是：

Using the 64 bit compiler from Microsoft

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

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

如果是GCC编译器或者其他的诸如sun Studio之类的，可以设置CFLAGS CXXFLAGS变量，加入-m32 或者-m64来编译x86或者x64的程序。

如果是windows平台下VS的project文件的话，请使用VS generator，cmake -G "Visual Studio 10 Win64"就是编译为x64，cmake -G "Visual Studio 10

"就是编译为x86.

如果是Mac OS X上，使用CMAKE_OSX_ARCHITECTURES这个CMAKE的内建变量。

cmake -DCMAKE_OSX_ARCHITECTURES=i386 /path/to/source/dir------编译为32位

cmake -DCMAKE_OSX_ARCHITECTURES=x86_64 /path/to/source/dir------编译为64位

cmake "-DCMAKE_OSX_ARCHITECTURES=x86_64;i386" /path/to/source/dir

-------编译为通用8664架构和i386架构的二进制

或者可以用另外一种方式，思路是这样的，其实编译为x86或者x64，本质上都是向linker传递特定的参数。如果是VS,或者是NMake的Makefiles的话，

直接使用CMAKE内建的变量CMAKE_EXE_LINKER_FLAGS,来设置链接器的参数。VS toolchain 可以这样 set(CMAKE_EXE_LINKER_FLAGS

"/machine:x86")。

这个变量官方给出来的解释是：

Linker flags to be used to create executables.

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

以下是构建一个console的demo：

1 SET(PROJECT_NAME dls_test)

2

3 PROJECT(${PROJECT_NAME})

4

5 CMAKE_MINIMUM_REQUIRED(VERSION 2.8)

6

7 #ADD_DEFINITIONS(-DUNICODE -D_UNICODE)

8 ADD_DEFINITIONS(-D_CONSOLE)

9

10

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

12

13

14 include_directories(${PROJECT_SOURCE_DIR})

15 include_directories(${PROJECT_SOURCE_DIR}/../inc)

16 include_directories(${PROJECT_SOURCE_DIR}/../wlp_adapter)

17 include_directories(${PROJECT_SOURCE_DIR}/../include)

18

19 LINK_DIRECTORIES(${PROJECT_SOURCE_DIR}/../lib)

20 #LINK_DIRECTORIES(${CMAKE_BINARY_DIR}/lib)

21

22 file(GLOB SRC RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} )

23 source_group("src" FILES ${SRC})

24

25 file(GLOB hdrs RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} *.h)

26 source_group("include" FILES ${hdrs})27

28 ADD_EXECUTABLE(${PROJECT_NAME} ${SRC} ${hdrs})29

30 if(WIN32)31 if(CMAKE_BUILD_TYPE MATCHES "Debug")32 #set(OPENCV_LIB "opencv_" "opencv_" "opencv_" )33 TARGET_LINK_LIBRARIES(${PROJECT_NAME} wlp_ libglog_ )34 else()35 TARGET_LINK_LIBRARIES(${PROJECT_NAME} wlp_ libglog_ )36 endif()37

38

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

40

41 else()42

43 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)44

45 endif()46

47 if(WIN32)48 else()49 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++0x -fPIC ")50 endif()51

52 set(CompilerFlags53 CMAKE_CXX_FLAGS54 CMAKE_CXX_FLAGS_DEBUG55 CMAKE_CXX_FLAGS_RELEASE56 CMAKE_C_FLAGS57 CMAKE_C_FLAGS_DEBUG58 CMAKE_C_FLAGS_RELEASE59 )60 foreach(CompilerFlag ${CompilerFlags})61 string(REPLACE "/MD" "/MT" ${CompilerFlag} "${${CompilerFlag}}")62 string(REPLACE "/Ob0" "" ${CompilerFlag} "${${CompilerFlag}}")63 string(REPLACE "/TC" "" ${CompilerFlag} "${${CompilerFlag}}")64 endforeach()65

66

67 INSTALL(TARGETS ${prj_name}68 RUNTIME DESTINATION bin69 LIBRARY DESTINATION lib70 ARCHIVE DESTINATION lib71 )72

73 install(DIRECTORY ${PROJECT_SOURCE_DIR}74 DESTINATION "."75 )View Code

reference：/questions/5334095/cmake-multiarchitecture-compilation/wh_xiexing/article/details/18301923/cmake/help/v3.0/variable/CMAKE_CL_tp:///cmake/help/v3.0/variable/CMAKE_EXE_LINKER_