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Getting an unexpected compiler flag

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  • mzimmersM Offline
    mzimmersM Offline
    mzimmers
    wrote on last edited by
    #1

    hi, all -

    I recently began experimentation with building the MySQL driver plugin. One leftover problem from that effort is that, somehow I'm getting a compiler flag that I don't want, and makes building impossible.

    The flag is "-std=c++1z". My version (4.9.2) of the compiler doesn't support it. I have absolutely no idea where this flag is coming from. I'm building from the command line instead of the .pro file (I have a different issue with trying to use Creator; I'll start a thread on that later if necessary.)

    Here's my mysql.pro file:

    TARGET = qsqlmysql
    
    HEADERS += $$PWD/qsql_mysql_p.h
    SOURCES += $$PWD/qsql_mysql.cpp $$PWD/main.cpp
    
    QMAKE_USE += mysql
    
    OTHER_FILES += mysql.json
    
    PLUGIN_CLASS_NAME = QMYSQLDriverPlugin
    include(../qsqldriverbase.pri)
    

    I'm really at a loss on this one. Can anyone proffer a suggestion?

    Thank you.

    mrjjM 1 Reply Last reply
    0
    • mzimmersM mzimmers

      hi, all -

      I recently began experimentation with building the MySQL driver plugin. One leftover problem from that effort is that, somehow I'm getting a compiler flag that I don't want, and makes building impossible.

      The flag is "-std=c++1z". My version (4.9.2) of the compiler doesn't support it. I have absolutely no idea where this flag is coming from. I'm building from the command line instead of the .pro file (I have a different issue with trying to use Creator; I'll start a thread on that later if necessary.)

      Here's my mysql.pro file:

      TARGET = qsqlmysql
      
      HEADERS += $$PWD/qsql_mysql_p.h
      SOURCES += $$PWD/qsql_mysql.cpp $$PWD/main.cpp
      
      QMAKE_USE += mysql
      
      OTHER_FILES += mysql.json
      
      PLUGIN_CLASS_NAME = QMYSQLDriverPlugin
      include(../qsqldriverbase.pri)
      

      I'm really at a loss on this one. Can anyone proffer a suggestion?

      Thank you.

      mrjjM Offline
      mrjjM Offline
      mrjj
      Lifetime Qt Champion
      wrote on last edited by
      #2

      @mzimmers said in Getting an unexpected compiler flag:

      -std=c++1z"

      Ehh is that not >2014 c++ ?
      How can you get that flag with gcc 4.9 ??

      Did you check qsqldriverbase.pri ?

      1 Reply Last reply
      0
      • mzimmersM Offline
        mzimmersM Offline
        mzimmers
        wrote on last edited by
        #3

        Yes, that flag demands the very latest version of the compiler. I asked about updating my compiler, and was told that could be a bad idea.

        Here's the contents of the .pri file:

        QT  = core core-private sql-private
        
        PLUGIN_TYPE = sqldrivers
        load(qt_plugin)
        
        DEFINES += QT_NO_CAST_TO_ASCII QT_NO_CAST_FROM_ASCII
        

        I don't know what that load(qt_plugin) does, but I don't think that's where this flag is being generated.

        mrjjM 1 Reply Last reply
        0
        • mzimmersM mzimmers

          Yes, that flag demands the very latest version of the compiler. I asked about updating my compiler, and was told that could be a bad idea.

          Here's the contents of the .pri file:

          QT  = core core-private sql-private
          
          PLUGIN_TYPE = sqldrivers
          load(qt_plugin)
          
          DEFINES += QT_NO_CAST_TO_ASCII QT_NO_CAST_FROM_ASCII
          

          I don't know what that load(qt_plugin) does, but I don't think that's where this flag is being generated.

          mrjjM Offline
          mrjjM Offline
          mrjj
          Lifetime Qt Champion
          wrote on last edited by mrjj
          #4

          @mzimmers

          Hmm nothing funky there.
          If you are on linux, why not try to grep for -std=c++1z in all files ?
          grep --include=*.{c,h} -rnw '/path/to/somewhere/' -e "pattern"
          or
          grep -Ril "text-to-find-here" /

          It must be there. also strace can show files it loads ( if via system)?

          It must be there somewhere :)

          mzimmersM 1 Reply Last reply
          0
          • mrjjM mrjj

            @mzimmers

            Hmm nothing funky there.
            If you are on linux, why not try to grep for -std=c++1z in all files ?
            grep --include=*.{c,h} -rnw '/path/to/somewhere/' -e "pattern"
            or
            grep -Ril "text-to-find-here" /

            It must be there. also strace can show files it loads ( if via system)?

            It must be there somewhere :)

            mzimmersM Offline
            mzimmersM Offline
            mzimmers
            wrote on last edited by
            #5

            @mrjj this is all I found:

            mzimmers@debian:~/QtStuff/qtbase/src/plugins/sqldrivers/mysql$ sudo grep --include=*.{c,h} -rnw '/' -e "-std=c++1z"
            [sudo] password for mzimmers: 
            /opt/arm-toolchain/gcc-linaro-6.2.1-2016.11-x86_64_arm-linux-gnueabihf/lib/gcc/arm-linux-gnueabihf/6.2.1/plugin/include/options.h:6509:  OPT_std_c__1z = 1294,                      /* -std=c++1z */
            mzimmers@debian:~/QtStuff/qtbase/src/plugins/sqldrivers/mysql$ sudo grep --include=*.{c,h} -rnw '/' -e "OPT_std_c__1z"
            /opt/arm-toolchain/gcc-linaro-6.2.1-2016.11-x86_64_arm-linux-gnueabihf/lib/gcc/arm-linux-gnueabihf/6.2.1/plugin/include/options.h:6509:  OPT_std_c__1z = 1294,                      /* -std=c++1z */
            mzimmers@debian:~/QtStuff/qtbase/src/plugins/sqldrivers/mysql$ 
            

            The line that the first search found is in an area I only use for cross development. I ran the second search for OPT_std_c__1z just to see if that showed up anywhere, but as you can see, nothing additional was found. Your 2nd grep command didn't work:

            mzimmers@debian:~/QtStuff/qtbase/src/plugins/sqldrivers/mysql$ grep -Ril "-std=c++1z" /
            grep: invalid option -- 't'
            Usage: grep [OPTION]... PATTERN [FILE]...
            Try 'grep --help' for more information.
            mzimmers@debian:~/QtStuff/qtbase/src/plugins/sqldrivers/mysql$ 
            

            I'm not sure how strace would be used to help with this...

            mrjjM 1 Reply Last reply
            0
            • mzimmersM mzimmers

              @mrjj this is all I found:

              mzimmers@debian:~/QtStuff/qtbase/src/plugins/sqldrivers/mysql$ sudo grep --include=*.{c,h} -rnw '/' -e "-std=c++1z"
              [sudo] password for mzimmers: 
              /opt/arm-toolchain/gcc-linaro-6.2.1-2016.11-x86_64_arm-linux-gnueabihf/lib/gcc/arm-linux-gnueabihf/6.2.1/plugin/include/options.h:6509:  OPT_std_c__1z = 1294,                      /* -std=c++1z */
              mzimmers@debian:~/QtStuff/qtbase/src/plugins/sqldrivers/mysql$ sudo grep --include=*.{c,h} -rnw '/' -e "OPT_std_c__1z"
              /opt/arm-toolchain/gcc-linaro-6.2.1-2016.11-x86_64_arm-linux-gnueabihf/lib/gcc/arm-linux-gnueabihf/6.2.1/plugin/include/options.h:6509:  OPT_std_c__1z = 1294,                      /* -std=c++1z */
              mzimmers@debian:~/QtStuff/qtbase/src/plugins/sqldrivers/mysql$ 
              

              The line that the first search found is in an area I only use for cross development. I ran the second search for OPT_std_c__1z just to see if that showed up anywhere, but as you can see, nothing additional was found. Your 2nd grep command didn't work:

              mzimmers@debian:~/QtStuff/qtbase/src/plugins/sqldrivers/mysql$ grep -Ril "-std=c++1z" /
              grep: invalid option -- 't'
              Usage: grep [OPTION]... PATTERN [FILE]...
              Try 'grep --help' for more information.
              mzimmers@debian:~/QtStuff/qtbase/src/plugins/sqldrivers/mysql$ 
              

              I'm not sure how strace would be used to help with this...

              mrjjM Offline
              mrjjM Offline
              mrjj
              Lifetime Qt Champion
              wrote on last edited by
              #6

              @mzimmers
              oh sorry. didn't have lin box to test on :)

              Hmm so your cross compiler is 6.2?

              Just to be clear. The 4.9 u are using is not for cross compile and for some reason
              it gets the flag?

              1 Reply Last reply
              0
              • mzimmersM Offline
                mzimmersM Offline
                mzimmers
                wrote on last edited by
                #7

                I'm using 4.9.2 for everything now. That directory is leftover (somehow didn't get removed when I uninstalled 6.2.1) and I should probably get rid of it, but I don't think that's causing this problem.

                I ran this grep (note the added files searched):

                mzimmers@debian:~/QtStuff/qtbase/src/plugins/sqldrivers/mysql$ sudo grep --include=*.{c,cpp,h,conf} -rnw '/' -e "QMAKE_CXXFLAGS_CXX1Z"
                /home/mzimmers/QtStuff/qtbase/mkspecs/linux-icc/qmake.conf:63:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /home/mzimmers/QtStuff/qtbase/mkspecs/macx-icc/qmake.conf:57:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /home/mzimmers/QtStuff/qtbase/mkspecs/win32-g++/qmake.conf:63:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /home/mzimmers/QtStuff/qtbase/mkspecs/win32-icc/qmake.conf:61:#QMAKE_CXXFLAGS_CXX1Z    = -Qstd=c++1z
                /home/mzimmers/QtStuff/qtbase/mkspecs/common/clang.conf:31:QMAKE_CXXFLAGS_CXX1Z             = -std=c++1z
                /home/mzimmers/QtStuff/qtbase/mkspecs/common/android-base-tail.conf:41:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /home/mzimmers/QtStuff/qtbase/mkspecs/common/g++-base.conf:32:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /home/mzimmers/QtStuff/qtbase/mkspecs/common/qcc-base-qnx.conf:47:QMAKE_CXXFLAGS_CXX1Z    = -Wc,-std=gnu++1z
                /opt/Qt/5.8/src/qtbase/mkspecs/linux-icc/qmake.conf:63:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /opt/Qt/5.8/src/qtbase/mkspecs/macx-icc/qmake.conf:57:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /opt/Qt/5.8/src/qtbase/mkspecs/win32-g++/qmake.conf:63:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /opt/Qt/5.8/src/qtbase/mkspecs/win32-icc/qmake.conf:61:#QMAKE_CXXFLAGS_CXX1Z    = -Qstd=c++1z
                /opt/Qt/5.8/src/qtbase/mkspecs/common/clang.conf:31:QMAKE_CXXFLAGS_CXX1Z             = -std=c++1z
                /opt/Qt/5.8/src/qtbase/mkspecs/common/android-base-tail.conf:41:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /opt/Qt/5.8/src/qtbase/mkspecs/common/g++-base.conf:32:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /opt/Qt/5.8/src/qtbase/mkspecs/common/qcc-base-qnx.conf:47:QMAKE_CXXFLAGS_CXX1Z    = -Wc,-std=gnu++1z
                /opt/Qt/5.8/Src/qtbase/mkspecs/linux-icc/qmake.conf:63:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /opt/Qt/5.8/Src/qtbase/mkspecs/macx-icc/qmake.conf:57:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /opt/Qt/5.8/Src/qtbase/mkspecs/win32-g++/qmake.conf:63:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /opt/Qt/5.8/Src/qtbase/mkspecs/win32-icc/qmake.conf:61:#QMAKE_CXXFLAGS_CXX1Z    = -Qstd=c++1z
                /opt/Qt/5.8/Src/qtbase/mkspecs/common/clang.conf:31:QMAKE_CXXFLAGS_CXX1Z             = -std=c++1z
                /opt/Qt/5.8/Src/qtbase/mkspecs/common/android-base-tail.conf:41:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /opt/Qt/5.8/Src/qtbase/mkspecs/common/g++-base.conf:32:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /opt/Qt/5.8/Src/qtbase/mkspecs/common/qcc-base-qnx.conf:47:QMAKE_CXXFLAGS_CXX1Z    = -Wc,-std=gnu++1z
                /opt/Qt/5.8/gcc_64/mkspecs/linux-icc/qmake.conf:63:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /opt/Qt/5.8/gcc_64/mkspecs/macx-icc/qmake.conf:57:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /opt/Qt/5.8/gcc_64/mkspecs/win32-g++/qmake.conf:63:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /opt/Qt/5.8/gcc_64/mkspecs/win32-icc/qmake.conf:61:#QMAKE_CXXFLAGS_CXX1Z    = -Qstd=c++1z
                /opt/Qt/5.8/gcc_64/mkspecs/common/clang.conf:31:QMAKE_CXXFLAGS_CXX1Z             = -std=c++1z
                /opt/Qt/5.8/gcc_64/mkspecs/common/android-base-tail.conf:41:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /opt/Qt/5.8/gcc_64/mkspecs/common/g++-base.conf:32:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /opt/Qt/5.8/gcc_64/mkspecs/common/qcc-base-qnx.conf:47:QMAKE_CXXFLAGS_CXX1Z    = -Wc,-std=gnu++1z
                /opt/arm-toolchain/sysroot-glibc-linaro-2.23-2016.11-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/linux-icc/qmake.conf:63:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /opt/arm-toolchain/sysroot-glibc-linaro-2.23-2016.11-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/macx-icc/qmake.conf:57:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /opt/arm-toolchain/sysroot-glibc-linaro-2.23-2016.11-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/win32-g++/qmake.conf:63:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /opt/arm-toolchain/sysroot-glibc-linaro-2.23-2016.11-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/win32-icc/qmake.conf:61:#QMAKE_CXXFLAGS_CXX1Z    = -Qstd=c++1z
                /opt/arm-toolchain/sysroot-glibc-linaro-2.23-2016.11-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/common/clang.conf:31:QMAKE_CXXFLAGS_CXX1Z             = -std=c++1z
                /opt/arm-toolchain/sysroot-glibc-linaro-2.23-2016.11-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/common/android-base-tail.conf:41:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /opt/arm-toolchain/sysroot-glibc-linaro-2.23-2016.11-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/common/g++-base.conf:32:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /opt/arm-toolchain/sysroot-glibc-linaro-2.23-2016.11-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/common/qcc-base-qnx.conf:47:QMAKE_CXXFLAGS_CXX1Z    = -Wc,-std=gnu++1z
                /opt/arm-toolchain/sysroot-eglibc-linaro-2017.01-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/linux-icc/qmake.conf:63:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /opt/arm-toolchain/sysroot-eglibc-linaro-2017.01-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/macx-icc/qmake.conf:57:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /opt/arm-toolchain/sysroot-eglibc-linaro-2017.01-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/win32-g++/qmake.conf:63:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /opt/arm-toolchain/sysroot-eglibc-linaro-2017.01-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/win32-icc/qmake.conf:61:#QMAKE_CXXFLAGS_CXX1Z    = -Qstd=c++1z
                /opt/arm-toolchain/sysroot-eglibc-linaro-2017.01-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/common/clang.conf:31:QMAKE_CXXFLAGS_CXX1Z             = -std=c++1z
                /opt/arm-toolchain/sysroot-eglibc-linaro-2017.01-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/common/android-base-tail.conf:41:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /opt/arm-toolchain/sysroot-eglibc-linaro-2017.01-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/common/g++-base.conf:32:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                /opt/arm-toolchain/sysroot-eglibc-linaro-2017.01-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/common/qcc-base-qnx.conf:47:QMAKE_CXXFLAGS_CXX1Z    = -Wc,-std=gnu++1z
                

                Nothing here looks particularly interesting. Can you think of any other file types that might sneak in a compiler flag?

                mrjjM 1 Reply Last reply
                0
                • mzimmersM mzimmers

                  I'm using 4.9.2 for everything now. That directory is leftover (somehow didn't get removed when I uninstalled 6.2.1) and I should probably get rid of it, but I don't think that's causing this problem.

                  I ran this grep (note the added files searched):

                  mzimmers@debian:~/QtStuff/qtbase/src/plugins/sqldrivers/mysql$ sudo grep --include=*.{c,cpp,h,conf} -rnw '/' -e "QMAKE_CXXFLAGS_CXX1Z"
                  /home/mzimmers/QtStuff/qtbase/mkspecs/linux-icc/qmake.conf:63:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /home/mzimmers/QtStuff/qtbase/mkspecs/macx-icc/qmake.conf:57:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /home/mzimmers/QtStuff/qtbase/mkspecs/win32-g++/qmake.conf:63:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /home/mzimmers/QtStuff/qtbase/mkspecs/win32-icc/qmake.conf:61:#QMAKE_CXXFLAGS_CXX1Z    = -Qstd=c++1z
                  /home/mzimmers/QtStuff/qtbase/mkspecs/common/clang.conf:31:QMAKE_CXXFLAGS_CXX1Z             = -std=c++1z
                  /home/mzimmers/QtStuff/qtbase/mkspecs/common/android-base-tail.conf:41:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /home/mzimmers/QtStuff/qtbase/mkspecs/common/g++-base.conf:32:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /home/mzimmers/QtStuff/qtbase/mkspecs/common/qcc-base-qnx.conf:47:QMAKE_CXXFLAGS_CXX1Z    = -Wc,-std=gnu++1z
                  /opt/Qt/5.8/src/qtbase/mkspecs/linux-icc/qmake.conf:63:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /opt/Qt/5.8/src/qtbase/mkspecs/macx-icc/qmake.conf:57:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /opt/Qt/5.8/src/qtbase/mkspecs/win32-g++/qmake.conf:63:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /opt/Qt/5.8/src/qtbase/mkspecs/win32-icc/qmake.conf:61:#QMAKE_CXXFLAGS_CXX1Z    = -Qstd=c++1z
                  /opt/Qt/5.8/src/qtbase/mkspecs/common/clang.conf:31:QMAKE_CXXFLAGS_CXX1Z             = -std=c++1z
                  /opt/Qt/5.8/src/qtbase/mkspecs/common/android-base-tail.conf:41:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /opt/Qt/5.8/src/qtbase/mkspecs/common/g++-base.conf:32:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /opt/Qt/5.8/src/qtbase/mkspecs/common/qcc-base-qnx.conf:47:QMAKE_CXXFLAGS_CXX1Z    = -Wc,-std=gnu++1z
                  /opt/Qt/5.8/Src/qtbase/mkspecs/linux-icc/qmake.conf:63:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /opt/Qt/5.8/Src/qtbase/mkspecs/macx-icc/qmake.conf:57:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /opt/Qt/5.8/Src/qtbase/mkspecs/win32-g++/qmake.conf:63:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /opt/Qt/5.8/Src/qtbase/mkspecs/win32-icc/qmake.conf:61:#QMAKE_CXXFLAGS_CXX1Z    = -Qstd=c++1z
                  /opt/Qt/5.8/Src/qtbase/mkspecs/common/clang.conf:31:QMAKE_CXXFLAGS_CXX1Z             = -std=c++1z
                  /opt/Qt/5.8/Src/qtbase/mkspecs/common/android-base-tail.conf:41:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /opt/Qt/5.8/Src/qtbase/mkspecs/common/g++-base.conf:32:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /opt/Qt/5.8/Src/qtbase/mkspecs/common/qcc-base-qnx.conf:47:QMAKE_CXXFLAGS_CXX1Z    = -Wc,-std=gnu++1z
                  /opt/Qt/5.8/gcc_64/mkspecs/linux-icc/qmake.conf:63:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /opt/Qt/5.8/gcc_64/mkspecs/macx-icc/qmake.conf:57:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /opt/Qt/5.8/gcc_64/mkspecs/win32-g++/qmake.conf:63:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /opt/Qt/5.8/gcc_64/mkspecs/win32-icc/qmake.conf:61:#QMAKE_CXXFLAGS_CXX1Z    = -Qstd=c++1z
                  /opt/Qt/5.8/gcc_64/mkspecs/common/clang.conf:31:QMAKE_CXXFLAGS_CXX1Z             = -std=c++1z
                  /opt/Qt/5.8/gcc_64/mkspecs/common/android-base-tail.conf:41:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /opt/Qt/5.8/gcc_64/mkspecs/common/g++-base.conf:32:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /opt/Qt/5.8/gcc_64/mkspecs/common/qcc-base-qnx.conf:47:QMAKE_CXXFLAGS_CXX1Z    = -Wc,-std=gnu++1z
                  /opt/arm-toolchain/sysroot-glibc-linaro-2.23-2016.11-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/linux-icc/qmake.conf:63:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /opt/arm-toolchain/sysroot-glibc-linaro-2.23-2016.11-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/macx-icc/qmake.conf:57:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /opt/arm-toolchain/sysroot-glibc-linaro-2.23-2016.11-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/win32-g++/qmake.conf:63:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /opt/arm-toolchain/sysroot-glibc-linaro-2.23-2016.11-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/win32-icc/qmake.conf:61:#QMAKE_CXXFLAGS_CXX1Z    = -Qstd=c++1z
                  /opt/arm-toolchain/sysroot-glibc-linaro-2.23-2016.11-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/common/clang.conf:31:QMAKE_CXXFLAGS_CXX1Z             = -std=c++1z
                  /opt/arm-toolchain/sysroot-glibc-linaro-2.23-2016.11-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/common/android-base-tail.conf:41:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /opt/arm-toolchain/sysroot-glibc-linaro-2.23-2016.11-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/common/g++-base.conf:32:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /opt/arm-toolchain/sysroot-glibc-linaro-2.23-2016.11-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/common/qcc-base-qnx.conf:47:QMAKE_CXXFLAGS_CXX1Z    = -Wc,-std=gnu++1z
                  /opt/arm-toolchain/sysroot-eglibc-linaro-2017.01-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/linux-icc/qmake.conf:63:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /opt/arm-toolchain/sysroot-eglibc-linaro-2017.01-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/macx-icc/qmake.conf:57:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /opt/arm-toolchain/sysroot-eglibc-linaro-2017.01-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/win32-g++/qmake.conf:63:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /opt/arm-toolchain/sysroot-eglibc-linaro-2017.01-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/win32-icc/qmake.conf:61:#QMAKE_CXXFLAGS_CXX1Z    = -Qstd=c++1z
                  /opt/arm-toolchain/sysroot-eglibc-linaro-2017.01-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/common/clang.conf:31:QMAKE_CXXFLAGS_CXX1Z             = -std=c++1z
                  /opt/arm-toolchain/sysroot-eglibc-linaro-2017.01-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/common/android-base-tail.conf:41:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /opt/arm-toolchain/sysroot-eglibc-linaro-2017.01-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/common/g++-base.conf:32:QMAKE_CXXFLAGS_CXX1Z    = -std=c++1z
                  /opt/arm-toolchain/sysroot-eglibc-linaro-2017.01-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/common/qcc-base-qnx.conf:47:QMAKE_CXXFLAGS_CXX1Z    = -Wc,-std=gnu++1z
                  

                  Nothing here looks particularly interesting. Can you think of any other file types that might sneak in a compiler flag?

                  mrjjM Offline
                  mrjjM Offline
                  mrjj
                  Lifetime Qt Champion
                  wrote on last edited by
                  #8

                  @mzimmers

                  Hi
                  Its a bit odd where it comes from since you do it by shell.

                  I was wondering. Did you compile Qt (arm) with much newer compiler and then
                  later went back to the 4.9 one but Qt is still compiled with the other?

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                  0
                  • mrjjM Offline
                    mrjjM Offline
                    mrjj
                    Lifetime Qt Champion
                    wrote on last edited by
                    #9

                    Hi
                    Can you please look here
                    http://lists.qt-project.org/pipermail/interest/2016-September/024454.html

                    seems you can call qmake with -d to see where stuff comes from.
                    Maybe we can use that :)

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                    • mzimmersM Offline
                      mzimmersM Offline
                      mzimmers
                      wrote on last edited by mzimmers
                      #10

                      Hi, mrjj -

                      1. I honestly don't remember what I used to build Qt for my ARM, but I think I built it with 4.9.2. I really don't think the ARM toolchain is what's causing this problem, though.

                      2. the -d option on qmake creates a tremendous amount of output...way too much to post here. I tried redirecting to a file using "> debug.out" at the end, but that didn't work. (I'm still new to the shell interface.)

                      EDIT: I looked through the output and found instances of that compiler flag in various .prf files:

                      sudo grep --include=*.{,prf} -rnw '/' -e "QMAKE_CXXFLAGS_CXX1Z"
                      [sudo] password for mzimmers: 
                      mzimmers@debian:~/QtStuff/qtbase/src/plugins/sqldrivers/mysql$ sudo grep --include=*.{,prf} -rnw '/' -e "1z"
                      /home/mzimmers/QtStuff/qtbase/mkspecs/features/default_post.prf:98:c++11|c++14|c++1z {
                      /home/mzimmers/QtStuff/qtbase/mkspecs/features/default_post.prf:101:        c++1z:       cxxstd = CXX1Z
                      /home/mzimmers/QtStuff/qtbase/mkspecs/features/qt_common.prf:17:qtConfig(c++1z): CONFIG += c++1z
                      /opt/Qt/5.8/src/qtbase/mkspecs/features/default_post.prf:98:c++11|c++14|c++1z {
                      /opt/Qt/5.8/src/qtbase/mkspecs/features/default_post.prf:101:        c++1z:       cxxstd = CXX1Z
                      /opt/Qt/5.8/src/qtbase/mkspecs/features/qt_common.prf:17:qtConfig(c++1z): CONFIG += c++1z
                      /opt/Qt/5.8/Src/qtbase/mkspecs/features/default_post.prf:98:c++11|c++14|c++1z {
                      /opt/Qt/5.8/Src/qtbase/mkspecs/features/default_post.prf:101:        c++1z:       cxxstd = CXX1Z
                      /opt/Qt/5.8/Src/qtbase/mkspecs/features/qt_common.prf:17:qtConfig(c++1z): CONFIG += c++1z
                      /opt/Qt/5.8/gcc_64/mkspecs/features/default_post.prf:98:c++11|c++14|c++1z {
                      /opt/Qt/5.8/gcc_64/mkspecs/features/default_post.prf:101:        c++1z:       cxxstd = CXX1Z
                      /opt/Qt/5.8/gcc_64/mkspecs/features/qt_common.prf:17:qtConfig(c++1z): CONFIG += c++1z
                      /opt/arm-toolchain/sysroot-glibc-linaro-2.23-2016.11-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/features/default_post.prf:98:c++11|c++14|c++1z {
                      /opt/arm-toolchain/sysroot-glibc-linaro-2.23-2016.11-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/features/default_post.prf:101:        c++1z:       cxxstd = CXX1Z
                      /opt/arm-toolchain/sysroot-glibc-linaro-2.23-2016.11-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/features/qt_common.prf:17:qtConfig(c++1z): CONFIG += c++1z
                      /opt/arm-toolchain/sysroot-eglibc-linaro-2017.01-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/features/default_post.prf:98:c++11|c++14|c++1z {
                      /opt/arm-toolchain/sysroot-eglibc-linaro-2017.01-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/features/default_post.prf:101:        c++1z:       cxxstd = CXX1Z
                      /opt/arm-toolchain/sysroot-eglibc-linaro-2017.01-arm-linux-gnueabihf/home/mzimmers/QtForBBB/mkspecs/features/qt_common.prf:17:qtConfig(c++1z): CONFIG += c++1z
                      mzimmers@debian:~/QtStuff/qtbase/src/plugins/sqldrivers/mysql$ 
                      

                      I don't know much at all about these .prf files, but lines like this make me wonder:

                      qtConfig(c++1z): CONFIG += c++1z
                      
                      1 Reply Last reply
                      0

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