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  1. Qt Creator
  2. QTCREATORBUG-19667

Clang Code Model fails to find header files (Generic Project)

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Details

    • Bug
    • Resolution: Invalid
    • P2: Important
    • None
    • Qt Creator 4.5.0, Qt Creator 4.6.0-beta1
    • C/C++/Obj-C++ Support
    • Fedora 27, Clang v5.0.1, Qt Creator 4.6.0 Beta1-1871

    Description

      I'm running Clang v5.0.1, originally on Qt Creator 4.5.0, but it behaves the same on 4.6.0 Beta1-1871. A simple hello-world application:

      #include <iostream>

int main(int, char*[])
{
    std::cout << "Hello World" << std::endl;
    return EXIT_SUCCESS;
}

       
      This obviously compiles and runs fine under GCC, but the CCM marks every line as some kind of error. Enabling CCM debug for Qt Creator reveals some interesting things: Clang cannot seem to find a header file despite looking in the correct place:

      ...
#include "..." search starts here:
#include <...> search starts here:
 /home/cmannett85/workspace/qtcreator-4.6.0-beta1/libexec/qtcreator/clang/lib/clang/5.0.1/include
 /home/cmannett85/workspace/qtcreator-4.6.0-beta1/share/qtcreator/cplusplus/wrappedQtHeaders
 /home/cmannett85/workspace/qtcreator-4.6.0-beta1/share/qtcreator/cplusplus/wrappedQtHeaders/QtCore
 /home/cmannett85/workspace/calrec/scratch
 /home/cmannett85/workspace/calrec
 /usr/local/include
 /usr/include
 /usr/include/c++/7
 /usr/include/c++/7/x86_64-redhat-linux
 /usr/include/c++/7/backward
 /usr/lib/gcc/x86_64-redhat-linux/7/include
 /tmp/QtCreator-mBdlxZ/clang-uiheader-UUGInf
End of search list.
Parsing /home/cmannett85/workspace/calrec/scratch/main.cpp:   0.1768 (100.0%)   0.0106 (100.0%)   0.1874 (100.0%)   0.1895 (100.0%)  
/usr/include/c++/7/cstdlib:75:15: fatal error: 'stdlib.h' file not found
...

      stdlib.h is in /usr/include, but for some reason Clang just doesn't see it.  I've attached the complete clang debug output.

      Attachments

        1. ccm_output.txt
          17 kB
          camden
        2. clang_debug.txt
          64 kB
          camden
        3. image-2018-08-22-10-38-59-746.png
          263 kB
          Michael Smirnoff
        4. image-2018-08-22-10-44-10-267.png
          77 kB
          Michael Smirnoff
        5. image-2020-02-24-16-58-54-343.png
          106 kB
          Evgeny Evgenyev
        6. log_clang.txt
          73 kB
          thibaultlejemble

        Issue Links

          is replaced by

          Bug - A problem which impairs or prevents the functions of the product. QTCREATORBUG-20231 clang code model has trouble finding clang include files when using libc++

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            People

              kandeler Christian Kandeler
              camden camden
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              Dates

                Created:
                Updated:
                Resolved:

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