Flex / Bison目标不存在

Question

我的项目中有一个带有两个cmake文件的子目录结构。其中一个应该是编译器，使用flex和bison，但是cmake给了我一个我不太明白的错误：

cmake_minimum_required(VERSION 2.8)

project(leaf)

add_subdirectory(leafc)

并在目录leafc中：

find_package(BISON)
find_package(FLEX)

BISON_TARGET(LeafParser ${CMAKE_CURRENT_SOURCE_DIR}/parser.y ${CMAKE_CURRENT_BINARY_DIR}/parser.cpp)
FLEX_TARGET(LeafScanner ${CMAKE_CURRENT_SOURCE_DIR}/lexer.l  ${CMAKE_CURRENT_BIANRY_DIR}/lexer.cpp)
ADD_FLEX_BISON_DEPENDENCY(LeafParser LeafScanner)

include_directories(${CMAKE_CURRENT_BINARY_DIR})
add_executable(leafc main.cpp ${BISON_LeafParser_OUTPUTS} ${FLEX_LeafScanner_OUTPUTS})

但是在尝试cmake .

时出现此错误

CMake Error at /usr/share/cmake-2.8/Modules/FindFLEX.cmake:132 (MESSAGE):
  Flex target `LeafParser' does not exists.
Call Stack (most recent call first):
  leafc/CMakeLists.txt:6 (ADD_FLEX_BISON_DEPENDENCY)

CMake Error at /usr/share/cmake-2.8/Modules/FindFLEX.cmake:136 (MESSAGE):
  Bison target `LeafScanner' does not exists.
Call Stack (most recent call first):
  leafc/CMakeLists.txt:6 (ADD_FLEX_BISON_DEPENDENCY)

CMake Error at /usr/share/cmake-2.8/Modules/FindFLEX.cmake:139 (SET_SOURCE_FILES_PROPERTIES):
  set_source_files_properties called with incorrect number of arguments.
Call Stack (most recent call first):
  leafc/CMakeLists.txt:6 (ADD_FLEX_BISON_DEPENDENCY)

-- Configuring incomplete, errors occurred!

文件在那里：

├── CMakeLists.txt
├── leafc
│   ├── CMakeLists.txt
│   ├── lexer.l
│   ├── main.cpp
│   └── parser.y
└── README

那我做错了什么？

Answer 1

看来你刚刚把ADD_FLEX_BISON_DEPENDENCY的论据搞砸了。尝试：

ADD_FLEX_BISON_DEPENDENCY(LeafScanner LeafParser)

此外，您的FLEX_TARGET电话中存在拼写错误（CMAKE_CURRENT_ BIANRY _DIR）。