已经存在的“没有制定目标的规则”

Posted 2023-02-16

【中文标题】已经存在的“没有制定目标的规则”

【英文标题】："No rule to make target" which already exists

【发布时间】：2020-04-03 20:08:09

【问题描述】：

我正在尝试从源代码构建 ROS，在我没有 root 访问权限的环境中，所以没有 sudo apt-get。

rospack 需要libtinyxml-dev，但我不能只安装那个包。因此，我从源代码构建了 TinyXML，并将其安装到 ~/usr/local/lib, include 中。一些目标（例如xmlrpcpp、rosbuild）构建良好，但rospack 抛出一个

make[2]: *** No rule to make target '/home/USERNAME/usr/local/lib/libtinyxml.so', needed by 
'/home/USERNAME/ros_desktop/catkin_ws/devel/.private/rospack/lib/librospack.so'.  Stop.

但是，文件libtinyxml.so 已经存在，并且是指向同样存在的libtinyxml.so.2.6.2 的符号链接。我完全不知道该怎么做。我试过add_library(... SHARED IMPORTED)，一般都在摆弄CMakeLists.txt，但没有骰子。我怎么能告诉 CMake “嘿，这个库存在，只需链接它！”或者，如果错误实际上意味着其他东西，得到更多信息的错误？如果图书馆已经存在，为什么还要make 图书馆？感谢任何可以帮助我的人！

CMakeLists.txt的内容：

cmake_minimum_required(VERSION 2.8.3)
project(rospack)

find_package(catkin REQUIRED COMPONENTS cmake_modules)
find_package(Boost REQUIRED COMPONENTS filesystem program_options system)
set(Python_ADDITIONAL_VERSIONS "$PYTHON_VERSION_MAJOR.$PYTHON_VERSION_MINOR")
find_package(PythonLibs "$PYTHON_VERSION_MAJOR.$PYTHON_VERSION_MINOR" REQUIRED)
find_package(TinyXML REQUIRED)

catkin_package(
  INCLUDE_DIRS include
  LIBRARIES rospack $PYTHON_LIBRARIES
  DEPENDS Boost TinyXML
)

#add_definitions(-Wall)

set(API_BACKCOMPAT_V1 "YES" CACHE BOOL "Whether to enable backwards compatibility with old C++ API")
if(API_BACKCOMPAT_V1)
  add_definitions(-DROSPACK_API_BACKCOMPAT_V1)
  set(backcompat_source src/rospack_backcompat.cpp)
endif()

include_directories(include $TinyXML_INCLUDE_DIRS $Boost_INCLUDE_DIRS $PYTHON_INCLUDE_DIRS)

add_library(rospack
  src/rospack.cpp
  $backcompat_source
  src/rospack_cmdline.cpp
  src/utils.cpp
)
target_link_libraries(rospack $TinyXML_LIBRARIES $Boost_LIBRARIES $PYTHON_LIBRARIES)

add_executable(rospackexe src/rospack_main.cpp)
# Set the name, and make it a "global" executable
set_target_properties(rospackexe PROPERTIES
  OUTPUT_NAME rospack
  RUNTIME_OUTPUT_DIRECTORY $CATKIN_DEVEL_PREFIX/bin)
target_link_libraries(rospackexe rospack $Boost_LIBRARIES)
add_executable(rosstackexe src/rosstack_main.cpp)
target_link_libraries(rosstackexe rospack $Boost_LIBRARIES)
# Set the name, and make it a "global" executable
set_target_properties(rosstackexe PROPERTIES
  OUTPUT_NAME rosstack
  RUNTIME_OUTPUT_DIRECTORY $CATKIN_DEVEL_PREFIX/bin)

install(TARGETS rospack rospackexe rosstackexe
  ARCHIVE DESTINATION $CATKIN_PACKAGE_LIB_DESTINATION
  LIBRARY DESTINATION $CATKIN_PACKAGE_LIB_DESTINATION
  RUNTIME DESTINATION $CATKIN_GLOBAL_BIN_DESTINATION)
install(DIRECTORY include/$PROJECT_NAME/
  DESTINATION $CATKIN_PACKAGE_INCLUDE_DESTINATION
  FILES_MATCHING PATTERN "*.h")

# uninstall target
configure_file(
  "$CMAKE_CURRENT_SOURCE_DIR/cmake_uninstall.cmake.in"
  "$CMAKE_CURRENT_BINARY_DIR/cmake_uninstall.cmake"
  IMMEDIATE @ONLY)
add_custom_target(uninstall COMMAND $CMAKE_COMMAND -P $CMAKE_CURRENT_BINARY_DIR/cmake_uninstall.cmake)

if(CATKIN_ENABLE_TESTING)
  add_subdirectory(test)
endif()

if(DOXYGEN_FOUND)
  add_custom_target(rospack-docs
    COMMAND doxygen Doxyfile
    WORKING_DIRECTORY $PROJECT_SOURCE_DIR)
endif()

【问题讨论】：

请不要描述您的代码，而是将其作为文本添加到您的问题帖子中。

Make 没有抱怨librospack.so。它在抱怨/home/USERNAME/usr/local/lib/libtinyxml.so。那不存在，而且你还没有告诉 make 如何创建它，所以它放弃了。

我的意思是“文件libtinyxml.so，然而，已经存在”

我还说它“是libtinyxml.so.2.6.2 的符号链接”，很抱歉这个错误，但至少可以推断出来哈哈

【参考方案1】：

解决了。

从 git repos 中克隆所有内容，分支kinetic-devel 从https://github.com/leethomason/tinyxml2.git 克隆 TinyXML2 构建 TinyXML2

cd [TinyXML2 DIR]
mkdir build
cd !$
cmake -DCMAKE_INSTALL_PREFIX=$HOME/.local ..
cmake --build .
cmake --build . --target install

Symlink TinyXML2 的 CMake 配置，以便 rospack 可以使用正确的包名找到

cd $HOME/.local/lib64/cmake/tinyxml2
ln -s tinyxml2Config.cmake TinyXML2Config.cmake

像这样给rospack的CMakeLists.txt打补丁

@@ -4 +4 @@
-find_package(catkin REQUIRED COMPONENTS cmake_modules)
+find_package(catkin REQUIRED)
@@ -32 +32 @@
-target_link_libraries(rospack $TinyXML2_LIBRARIES $Boost_LIBRARIES $PYTHON_LIBRARIES)
+target_link_libraries(rospack tinyxml2::tinyxml2 $Boost_LIBRARIES $PYTHON_LIBRARIES)

应用 these changes，因为 kinetic-devel 分支不针对 TinyXML2 构建。 catkin build --cmake-args -DCMAKE_PREFIX_PATH=$HOME/.local -- rospack source [Catkin_Workspace]/devel/setup.bash && catkin build