对于我来说，我使用的是cmake 3.5，下面(设置变量)不起作用:

set(
      ARCHIVE_OUTPUT_DIRECTORY "/home/xy/cmake_practice/lib/"
      LIBRARY_OUTPUT_DIRECTORY "/home/xy/cmake_practice/lib/"
      RUNTIME_OUTPUT_DIRECTORY "/home/xy/cmake_practice/bin/"
)

但这是有效的(set set_target_properties):

set_target_properties(demo5
    PROPERTIES
    ARCHIVE_OUTPUT_DIRECTORY "/home/xy/cmake_practice/lib/"
    LIBRARY_OUTPUT_DIRECTORY "/home/xy/cmake_practice/lib/"
    RUNTIME_OUTPUT_DIRECTORY "/home/xy/cmake_practice/bin/"
)

使用以下行配置:

集(EXECUTABLE_OUTPUT_PATH $ {PROJECT_SOURCE_DIR} /构建/) 放置任何CMakeLists.txt项目。

这个${PROJECT_SOURCE_DIR}是项目所在的当前源目录。 如果想知道为什么是${EXECUTABLE_OUTPUT_PATH}，检查这个文件CMakeCache.txt，然后搜索关键字输出路径，所有变量都定义在这里，它会给出项目所有设置的完整解释。

cat CMakeLists.txt
project (hello)
set(CMAKE_BINARY_DIR "/bin")
set(EXECUTABLE_OUTPUT_PATH ${CMAKE_BINARY_DIR})
add_executable (hello hello.c)

使用EXECUTABLE_OUTPUT_PATH CMake变量设置所需的路径。详细信息请参考CMake在线文档:

CMake 2.8.8文档

对于我来说，我使用的是cmake 3.5，下面(设置变量)不起作用:

set(
      ARCHIVE_OUTPUT_DIRECTORY "/home/xy/cmake_practice/lib/"
      LIBRARY_OUTPUT_DIRECTORY "/home/xy/cmake_practice/lib/"
      RUNTIME_OUTPUT_DIRECTORY "/home/xy/cmake_practice/bin/"
)

但这是有效的(set set_target_properties):

set_target_properties(demo5
    PROPERTIES
    ARCHIVE_OUTPUT_DIRECTORY "/home/xy/cmake_practice/lib/"
    LIBRARY_OUTPUT_DIRECTORY "/home/xy/cmake_practice/lib/"
    RUNTIME_OUTPUT_DIRECTORY "/home/xy/cmake_practice/bin/"
)

$ cat CMakeLists.txt
project (hello)
set(EXECUTABLE_OUTPUT_PATH "bin")
add_executable (hello hello.c)