Uploaded image for project: 'Qt'
  1. Qt
  2. QTBUG-69994

Building Qt with MSVC 15.8 ends in assertion during configure

    XMLWordPrintable

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Not Evaluated
    • Resolution: Duplicate
    • Affects Version/s: 5.11.1
    • Fix Version/s: None
    • Component/s: Build System
    • Labels:
      None
    • Platform/s:
      Windows
    • Commits:
      0ef66e98ccf4946a0e4513ab5fc157df0f0aca4e

      Description

      Hi all,

      I'm trying to compile Qt5.11.1 and during the configure step it throws the follwoing assertion:

       

      C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\VC\Tools\MSVC\14.15.26726\include\type_traits(1271): error C2338: You've instantiated std::aligned_storage<Len, Align> with an extended alignment (in other words, Align > alignof(max_align_t)). Before VS 2017 15.8, the member type would non-conformingly have an alignment of only alignof(max_align_t). VS 2017 15.8 was fixed to handle this correctly, but the fix inherently changes layout and breaks binary compatibility (*only* for uses of aligned_storage with extended alignments). Please define either (1) _ENABLE_EXTENDED_ALIGNED_STORAGE to acknowledge that you understand this message and that you actually want a type with an extended alignment, or (2) _DISABLE_EXTENDED_ALIGNED_STORAGE to silence this message and get the old non-conformant behavior. (compiling source file C:\Qt_src\5.11.1\qtbase\src\corelib\global\qrandom.cpp)
      

       

      I tried to set the define as the following:

       

      configure.bat -top-level -opensource -confirm-license -c++std c++1z -D _ENABLE_EXTENDED_ALIGNED_STORAGE -debug-and-release -shared 

       

      It doesn't solve the error. I tried "_DISABLE_EXTENDED_ALIGNED_STORAGE", too.

      Any ideas, where to set the needed define for nmake / MSVC?

      Best regards,
      Mike

        Attachments

          Issue Links

          No reviews matched the request. Check your Options in the drop-down menu of this sections header.

            Activity

              People

              Assignee:
              buddenha Oswald Buddenhagen
              Reporter:
              lachrymology Mike
              Votes:
              0 Vote for this issue
              Watchers:
              1 Start watching this issue

                Dates

                Created:
                Updated:
                Resolved:

                  Gerrit Reviews

                  There are no open Gerrit changes