将boost program_options作为git子模块添加，并使用其源代码构建可执行文件

Question

我有一个使用boost::program_options的小项目。我想将此库（仅此库）作为git submodule添加到我的项目中，并使用其源代码构建可执行文件。

我已经完成了git submodule部分（git submodule add https://github.com/boostorg/program_options.git），并且做了一个小型实验，在该实验中，我仅使用提到的子模块中的源代码构建了示例应用程序（仔细检查是否没有额外的依赖项） 。

现在，我想将这些源添加到我的项目中。我在CMakeLists.txt文件中所做的是：

set(BOOST_PROGRAM_OPTIONS_SOURCES
  boost/program_options/src/split.cpp
  boost/program_options/src/positional_options.cpp
  boost/program_options/src/parsers.cpp
  boost/program_options/src/options_description.cpp
  boost/program_options/src/convert.cpp
  boost/program_options/src/config_file.cpp
  boost/program_options/src/cmdline.cpp
  boost/program_options/src/winmain.cpp
  boost/program_options/src/variables_map.cpp
  boost/program_options/src/value_semantic.cpp
  boost/program_options/src/utf8_codecvt_facet.cpp
)

和

add_executable(
  ...
  src/main.cpp
  ${BOOST_PROGRAM_OPTIONS_SOURCES}
)

但出现以下错误：

CMake Error at CMakeLists.txt:69 (add_executable):
  The target name "boost/program_options/src/split.cpp" is reserved or not
  valid for certain CMake features, such as generator expressions, and may
  result in undefined behavior.


CMake Error at CMakeLists.txt:86 (target_link_libraries):
  Cannot specify link libraries for target "..." which is not built
  by this project.

做什么是我想要的正确方法>

Answer 1

我发现了问题。

我已将boost::program_options（git clone https://github.com/boostorg/program_options.git）克隆到与CMakeLists.txt相同的文件夹中>

此后，遵循正常的FindBoost流程

set(Boost_USE_STATIC_LIBS OFF)
set(Boost_USE_MULTITHREADED OFF)
set(Boost_USE_STATIC_RUNTIME OFF)

find_package(Boost 1.45.0 COMPONENTS program_options)

if(Boost_FOUND)
  message(WARNING "BOOST FOUND")
  include_directories(${Boost_INCLUDE_DIRS})
  set(BOOST_LIBS ${Boost_LIBRARIES})
else()
  set(BOOST_LIBS )
  message(WARNING "BOOST NOT FOUND")
endif()
...
...
target_link_libraries(... ${BOOST_LIBS})
...
...
[CMake仍然可以找到增强，即使program_options不包含任何CMakeLists.txt（至少我找不到）