In CLion, header only library: file “does not belong to any project target, code insight features might not work properly”

Little background

I was having the same problem, albeit the project was not header-only, nevertheless, the open files from inc folder were throwing the aforementioned warning, even though the CMake file clearly marked that folder to be include_directory.

*.hpp files do not belong to ${SOURCE}

include_directories("${PROJECT_SOURCE_DIR}/inc/")
add_subdirectory(src)
add_executable(${EXECUTABLE_NAME} main.cpp ${SOURCE})

Since this is a perfectly valid CMake file and adding the include files to source files is not idiomatic, I did not want to amend the CMake file.

The solution

As described on the official JetBrains Forum, the CMake file is indeed valid and the warning is shown because of the inability of CLion to properly index header files. The suggested workaround extracted from the link is to right-click the folder and Mark directory as | Library Files/Project Sources and Headers.

So, this header isn’t includes in executables and CLion notifies you that some code insight features might not work properly. As workaround you can use “Mark directory as” Library Files/Project Source and Headers for folder.

Related Posts:

  1. Difference between using Makefile and CMake to compile the code
  2. What is the difference between include_directories and target_include_directories in CMake?
  3. CMake error at CMakeLists.txt:30 (project): No CMAKE_C_COMPILER could be found
  4. Debug vs Release in CMake
  5. Debug vs Release in CMake
  6. android,
    android-layout,
    android-linearlayout,
    gradient,
  7. CMake : C and CXX compiler identification is unknown Win10 CMakeGUI
  8. The CXX compiler identification is unknown
  9. What is a segmentation fault?
  10. Sleep for milliseconds
  11. C++ Cout & Cin & System “Ambiguous” [closed]
  12. Floating point exception( core dump
  13. Passing Arrays to Function in C++
  14. Split a string using C++11
  15. error: expected unqualified-id error: Meaning and fix? [duplicate]
  16. How to track down a “double free or corruption” error
  17. undefined reference to `WinMain@16′
  18. How can I clear console
  19. How to go from fopen to fopen_s
  20. How does the modulus operator work?
  21. Single class has a Class Redefinition Error
  22. Identifier not found error on function call
  23. Debug assertion failed. C++ vector subscript out of range
  24. What causes a SIGABRT fault?
  25. Graphics Library for C++
  26. wntdll.pdb not loaded – Can’t see the exception
  27. Setting an int to Infinity in C++
  28. What exactly is std::atomic?
  29. Separating class code into a header and cpp file
  30. Deep copy vs Shallow Copy
  31. Pointer to incomplete class type is not allowed
  32. C++ error: “Array must be initialized with a brace enclosed initializer”
  33. Why am I getting string does not name a type Error?
  34. How to ensure that a std::map is ordered?
  35. How to write C++ getters and setters
  36. std::out_of_range error?
  37. Checking cin input stream produces an integer
  38. Where do “pure virtual function call” crashes come from?
  39. How to convert vector to array
  40. Understanding glm::lookAt()
  41. How to get current timestamp in milliseconds since 1970 just the way Java gets
  42. What is the best open XML parser for C++?
  43. *** No rule to make target ‘class.cpp’, needed by `build/….x86/class.o` Stop. error in Ubuntu
  44. What’s the difference between opening a file with ios::binary or ios::out or both?
  45. Hash function for a string
  46. How to run valgrind with basic c example?
  47. initial value of reference to non-const must be an lvalue
  48. Typedef function pointer?
  49. cc1plus: error: unrecognized command line option “-std=c++11” with g++
  50. cannot declare variable ‘’ to be of abstract type ‘’
  51. Difference between ‘struct’ and ‘typedef struct’ in C++?
  52. Compiling simple Hello World program on OS X via command line
  53. Cannot open output file, permission denied
  54. Strange error C2131: expression did not evaluate to a constant in VC 2015
  55. error: called object type ‘int’ is not a function or function pointer
  56. Hash function for a string
  57. Is there a replacement for unistd.h for Windows (Visual C)?
  58. How to call on a function found on another file?
  59. How to project a point onto a plane in 3D?
  60. Using C-string gives Warning: “Address of stack memory associated with local variable returned”
  61. generate random double numbers in c++
  62. Cygwin Make bash command not found
  63. C++ Compiler Error C2280 “attempting to reference a deleted function” in Visual Studio 2013 and 2015
  64. What is wrong with using goto?
  65. Double pointer array in c++
  66. Don’t understand static boolean behavior
  67. How to write std::string to file?
  68. Member declaration not found
  69. What is the difference between a .cpp file and a .h file?
  70. Stable Cotangent
  71. How to change string into QString?
  72. Including .cpp files
  73. Class template inheritance C++
  74. C++ error: undefined reference to ‘clock_gettime’ and ‘clock_settime’
  75. C++ compiler error: “return type specification for constructor invalid”
  76. error: ISO C++ forbids in-class initialization of non-const static member
  77. Function call missing argument list to create pointer
  78. cannot specify explicit initializer for arrays
  79. What does ** mean in C++?
  80. Incomplete type is not allowed: stringstream
  81. Initializing default values in a struct
  82. Warning: comparison of distinct pointer types
  83. Two decimal places using printf( )
  84. error C2244 unable to match function definition to an existing declaration
  85. Initializing pointers in C++
  86. Static vs dynamic type checking in C++
  87. Converting bool to text in C++
  88. clearing a vector of pointers [duplicate]
  89. Evaluate a string with a switch in C++ [duplicate]
  90. C++ JSON Serialization
  91. stack around the variable…was corrupted
  92. Creating a list to hold objects in C++
  93. What does “warning: not all control paths return a value” mean? (C++)
  94. Array of Linked Lists C++
  95. Is it still safe to delete nullptr in c++0x?
  96. Declaration is incompatible with type
  97. One or more multiply defined symbols found
  98. I’m getting the error “stoi is not a member of std” in myprogramminglab [duplicate]
  99. Template constructor in a class template – how to explicitly specify template argument for the 2nd parameter?
  100. C++ float array initialization 

Leave a Comment

tech