CMake有多个子目录没有编译

时间:2016-10-17 02:36:47

标签: c++ build compiler-errors cmake subdirectory

我的问题是CMake拒绝编译,给出以下错误:

 [orpheus@Poseidon build]$ make 
 sources : /home/orpheus/Projects/Personal/C++/test/testProj/src/helloworld/MyClass.cpp/home/orpheus/Projects/Personal/C++/test/testProj/src/helloworld.cpp
 headers : /home/orpheus/Projects/Personal/C++/test/testProj/include/helloworld/MyClass.hpp
 -- Configuring done
 -- Generating done
 -- Build files have been written to: /home/orpheus/Projects/Personal/C++/test/build
 [ 33%] Building CXX object CMakeFiles/TEST.dir/testProj/src/helloworld/MyClass.cpp.o
 /home/orpheus/Projects/Personal/C++/test/testProj/src/helloworld/MyClass.cpp:1:51: fatal error: testProj/include/helloworld/MyClass.hpp: No such file or directory
  #include "testProj/include/helloworld/MyClass.hpp"
                                                    ^
 compilation terminated.
 make[2]: *** [CMakeFiles/TEST.dir/build.make:63:      CMakeFiles/TEST.dir/testProj/src/helloworld/MyClass.cpp.o] Error 1
 make[1]: *** [CMakeFiles/Makefile2:68: CMakeFiles/TEST.dir/all] Error 2
 make: *** [Makefile:84: all] Error 2

我对CMake相对较新,并且已经完成了我能找到的大部分教程以及我能找到的所有相关的堆栈溢出问题,但似乎没有什么能满足我的特殊需求,我做了(在我的调整中)偶然发现这种情况没有发生(不幸的是我现在无法复制)但是这给了我一个链接错误声称:

 c++; fatal error: no input files

我应该使用include_directory()命令而不是set()来添加头文件吗?

我决定不使用glob()方法根据CMake documentation添加来源,并根据this thread和各种教程提供我的解决方案。

我有以下项目结构:

test/
 |
 +--CMakeLists.txt
 +--build/
 |     |----CMakeFiles/
 |     |----etc
 |
 +--testProj/
 |     +----CMakeLists.txt
 |     +----include
 |     |       +----CMakeLists.txt
 |     |       +----helloworld/
 |     |       |        +----CMakeLists.txt
 |     |       |        +----MyClass.hpp  
 |     |
 |     |----src
 |     |     +----helloworld.cpp
 |     |     +----CMakeLists.txt
 |     |     +----helloworld/
 |     |     |       +----CMakeLists.txt
 |     |     |       +----MyClass.cpp

文件如下:

测试/ CMakeFiles.txt

 cmake_minimum_required(VERSION 3.6.1)
 project(TEST)
 add_subdirectory(testProj)
 add_executable(${CMAKE_PROJECT_NAME} ${sources} ${headers})
 set_target_properties(${CMAKE_PROJECT_NAME} PROPERTIES LINKER_LANGUAGE CXX)
 set(extraFlags "-Wall -Wextra -Weffc++ -pedantic -pedantic-errors -std=c++14")
 set(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} ${extraFlags})

测试/ testProj /的CMakeLists.txt

 include_directories(include)
 add_subdirectory(src)
 add_subdirectory(include)
 set(sources ${sources} PARENT_SCOPE)
 set(headers ${headers} PARENT_SCOPE)

测试/ testProj /包含/的CMakeLists.txt

 include_directories(helloworld)
 add_subdirectory(helloworld)
 set(headers ${headers} PARENT_SCOPE)

测试/ testProj /包含/的HelloWorld /的CMakeLists.txt

 set(
    headers
    ${headers}
    ${CMAKE_CURRENT_SOURCE_DIR}/MyClass.hpp
    PARENT_SCOPE
)

测试/ testProj / SRC /的CMakeLists.txt

 add_subdirectory(helloworld)
 set(
        sources 
        ${sources} 
        ${CMAKE_CURRENT_SOURCE_DIR}/helloworld.cpp 
        PARENT_SCOPE
 )

测试/ testProj / SRC /的HelloWorld /的CMakeLists.txt

 set(
    sources
    ${sources}
    ${CMAKE_CURRENT_SOURCE_DIR}/MyClass.cpp
    PARENT_SCOPE
    )

请有人指出我正确的方向,因为我要把头伸进显示器。

2 个答案:

答案 0 :(得分:1)

确实是我的'include_directories()'是问题所在,我没有意识到它是recursive command使包含子库中的工作变得多余,我通过在我的根中添加以下行来修复此问题{ {1}}

CMakeLists.txt

然后修改我的 target_include_directories(${CMAKE_PROJECT_NAME} PRIVATE ${PROJECT_SOURCE_DIR}/testProj/include/) 语句以反映#include目录现在位于我的包含路径上。

以及删除现在冗余的代码嵌套子目录中的其他CMakeList文件

感谢Jacob Panikulum让我指向正确的方向。

答案 1 :(得分:0)

尝试

#include <MyClass.hpp>

引号告诉编译器寻找相对路径。相对于MyClass.cpp

,该路径上的标题确实不存在

尖括号告诉编译器开始查看CMake include_directories文件夹。由于您执行了include_directories(hello_world),因此当您包含&lt; *&gt;时,编译器将开始查看include/hello_world