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  1. Qt
  2. QTBUG-89122

Building Qt with cmake needs 15% more space than with qmake

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Details

    • Bug
    • Resolution: Done
    • P3: Somewhat important
    • None
    • 6.1
    • Build System: CMake
    • None
    • Ubuntu 20.04 LTS
      clang 10.0.0

    Description

      1. Clone qtbase.
        I'm at f071ba31b2e441268518217cbe2ec4fe1c978b31
      2. Do shadow builds of this in empty directories.
        I used: 
        MAKEFLAGS=-j7 nice ../qtbase/configure -platform linux-clang -opensource -confirm-license -nomake examples -nomake tests -prefix $PWD -release <buildtool> && nice make -j7

        with <buildtool> being -cmake or -qmake, respektively.

      3. Check the sizes of these builds: 
        qtrob@rob-desktop:/tmp/sizetest$ du -sh *make
715M	cmake
622M	qmake

      Attachments

        1. cmake.txt
          5 kB
        2. qmake.txt
          3 kB
        3. treecmake.txt
          33 kB
        4. treeqmake.txt
          23 kB

        Issue Links

          relates to

          Epic - Created by Jira Software - do not edit or delete. Issue type for a big user story that needs to be broken down. QTBUG-97601 Compilation speed decrease with Qt 6.2 compared to Qt 5.15.2

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • In Progress
          resulted from

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-89476 [REG 5.15 -> 6.0] Configure doesn't build for release by default

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
          For Gerrit Dashboard: QTBUG-89122
          # Subject Branch Project Status CR V
          326107,2 oss-fuzz: Disable precompiled headers dev qt/qtqa Status: ABANDONED +1 0
          366532,3 CMake: Fix excessive size of precompiled header files dev qt/qtbase Status: MERGED +2 0
          366638,2 CMake: Fix excessive size of precompiled header files 6.2 qt/qtbase Status: MERGED +2 0

          Activity

            People

              jbornema Joerg Bornemann
              rlohning Robert Löhning
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              Dates

                Created:
                Updated:
                Resolved:

                Gerrit Reviews

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