实际上他们两个可以达到一个目标（对于文件操作），但是又有本质上的区别，文档没有细看，但是一般利于项目的管理，使用install，install命令如果在cmake命令中没有指名install参数，实际上时不会执行的，只有在cmake命令中指名install，install命令（在CmakeLists.txt里）才会执行。
Demo:
cmake_minimum_required(VERSION 2.8) #set(CMAKE_C_COMPILER "D:\VS2008Release\VC\bin\amd64")
#set(CMAKE_CXX_COMPILER "D:\VS2008Release\VC\bin\amd64") PROJECT(VisualStaticMT) #set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/Lib)
#set(ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/Lib")
#message(STATUS ${CMAKE_BINARY_DIR}) set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin) #set(SHARE_LIBS_DIR ${CMAKE_BINARY_DIR}/Lib) add_subdirectory(bzlib)
add_subdirectory(cairo)
add_subdirectory(coders)
add_subdirectory(croco)
add_subdirectory(ffi)
add_subdirectory(filters)
add_subdirectory(glib)
add_subdirectory(jbig)
add_subdirectory(jp2)
add_subdirectory(jpeg)
add_subdirectory(lcms)
add_subdirectory(librsvg)
add_subdirectory(libxml)
add_subdirectory(lqr)
add_subdirectory(magick)
add_subdirectory(Magick++)
add_subdirectory(pango)
add_subdirectory(pixman)
add_subdirectory(png)
add_subdirectory(tiff)
add_subdirectory(ttf)
add_subdirectory(wand)
add_subdirectory(webp)
add_subdirectory(wmf)
add_subdirectory(zlib) #头文件输出
#file(COPY "${CMAKE_CURRENT_SOURCE_DIR}/Magick++/lib/Magick++.h"
#DESTINATION "${CMAKE_BINARY_DIR}/include" )
install(FILES "${CMAKE_CURRENT_SOURCE_DIR}/Magick++/lib/Magick++.h"
DESTINATION "${CMAKE_BINARY_DIR}/include"
) #wand文件夹 file(GLOB wand_hdrs "${CMAKE_CURRENT_SOURCE_DIR}/wand/*.h")
#file(COPY ${wand_hdrs}
#DESTINATION "${CMAKE_BINARY_DIR}/include/wand" ) install(FILES ${wand_hdrs}
DESTINATION "${CMAKE_BINARY_DIR}/include/wand"
) #file(COPY "${CMAKE_CURRENT_SOURCE_DIR}/VisualMagick/wand/wand-config.h.in"
#DESTINATION "${CMAKE_BINARY_DIR}/include/wand" )
#文件重命名
#file(RENAME "${CMAKE_BINARY_DIR}/include/wand/wand-config.h.in" "${CMAKE_BINARY_DIR}/include/wand/wand-config.h") install(FILES "${CMAKE_CURRENT_SOURCE_DIR}/VisualMagick/wand/wand-config.h.in"
DESTINATION "${CMAKE_BINARY_DIR}/include/wand"
RENAME "wand-config.h") #Magick++文件夹
file(GLOB Magick_hdrs "${CMAKE_CURRENT_SOURCE_DIR}/Magick++/lib/Magick++/*.h")
#file(COPY ${Magick_hdrs}
#DESTINATION "${CMAKE_BINARY_DIR}/include/Magick++" ) install(FILES ${Magick_hdrs}
DESTINATION "${CMAKE_BINARY_DIR}/include/Magick++"
) #magick文件夹
file(GLOB magick_hdrs "${CMAKE_CURRENT_SOURCE_DIR}/magick/*.h")
#file(COPY ${magick_hdrs}
#DESTINATION "${CMAKE_BINARY_DIR}/include/magick"
#)
install(FILES ${magick_hdrs}
DESTINATION "${CMAKE_BINARY_DIR}/include/magick"
) #wand
#add_subdirectory(cairo)