构建llvm ClangTool

Question

我设法构建了llvm和clang，现在我正在尝试根据clang docs创建一个ClangTool。但是当我尝试构建它时，我收到以下错误：

CMake Error at tools/clang/tools/loop-convert/CMakeLists.txt:6 (target_link_libraries):
  The keyword signature for target_link_libraries has already been used with 
  the target "loop-convert".  All uses of target_link_libraries with a target
  must be either all-keyword or all-plain.

  The uses of the keyword signature are here:

    * cmake/modules/LLVM-Config.cmake:105 (target_link_libraries)
    * cmake/modules/AddLLVM.cmake:771 (target_link_libraries)

我目前的CMakeLists.txt是：

set(LLVM_LINK_COMPONENTS support)

add_clang_executable(loop-convert
  LoopConvert.cpp
)

target_link_libraries(loop-convert
  clangTooling
  clangBasic
  clangASTMatchers
)

Answer 1

您需要使用target_link_libraries的关键字签名;实际上，您需要在PRIVATE中的target_link_libraries语句中添加CMakeLists.txt：

target_link_libraries(loop-convert PRIVATE
  clangTooling
  clangBasic
  clangASTMatchers
)

这是因为add_llvm_executable使用了这样的签名而你无法在CMake中混合它们。