Unable to deploy Qt app under Linux

mbnoimi

I pushed my init project to github so because of this error I'm unable to connect to database:

mbnoimivm@ubuntu:~$ /opt/sync-accounts-manager/SyncAccountsManager.sh
QSqlDatabase: QMYSQL driver not loaded
QSqlDatabase: available drivers: QSQLITE QMYSQL QMYSQL3 QPSQL QPSQL7
Unable to connect!
^C
mbnoimivm@ubuntu:~$ ldd /opt/sync-accounts-manager/SyncAccountsManager
/opt/sync-accounts-manager/SyncAccountsManager: /usr/lib/x86_64-linux-gnu/libQt5Core.so.5: no version information available (required by /opt/sync-accounts-manager/SyncAccountsManager)
/opt/sync-accounts-manager/SyncAccountsManager: /usr/lib/x86_64-linux-gnu/libQt5Core.so.5: no version information available (required by /opt/sync-accounts-manager/SyncAccountsManager)
/opt/sync-accounts-manager/SyncAccountsManager: /usr/lib/x86_64-linux-gnu/libQt5Sql.so.5: no version information available (required by /opt/sync-accounts-manager/SyncAccountsManager)
        linux-vdso.so.1 =>  (0x00007ffd5594c000)
        libQt5Sql.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Sql.so.5 (0x00007f86d6806000)
        libQt5Core.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 (0x00007f86d6160000)
        libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f86d5e5b000)
        libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f86d5c45000)
        libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f86d5880000)
        libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f86d5661000)
        libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f86d5448000)
        libicui18n.so.52 => /usr/lib/x86_64-linux-gnu/libicui18n.so.52 (0x00007f86d5041000)
        libicuuc.so.52 => /usr/lib/x86_64-linux-gnu/libicuuc.so.52 (0x00007f86d4cc7000)
        libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f86d4ac3000)
        libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007f86d47bb000)
        librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f86d45b2000)
        libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f86d42ac000)
        /lib64/ld-linux-x86-64.so.2 (0x000055adc312e000)
        libicudata.so.52 => /usr/lib/x86_64-linux-gnu/libicudata.so.52 (0x00007f86d2a3e000)
        libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f86d2800000)
mbnoimivm@ubuntu:~$

kshegunov

@mbnoimi
Try running chrpath -d on your binary (and/or Qt) to remove the rpath.

Found the suggestion on the deb mailing list.

ambershark

@mbnoimi Do you have mysql as a plugin in Qt? If so you need to make sure you have the plugins set up on your machine properly.

On your development machine they will work properly but when you distribute they may not.

Usually I distribute then in the lib directory I use and then plugins, so something like this:

myapp/
   bin/
      myapp (actual binary)
      qt.conf
   libs/
      libmylib.so
      libQt5Core.so.5
      plugins/
         platforms/
            libqxcb.so (linux)
         sqldrivers/
            libsqlmysql.so
   myapp (shell script to launch with a custom LD path)

Inside the qt.conf file you need:

[Paths]
Plugins = ../libs/plugins

Then I use a shell script to start my app:

#!/bin/sh

dir="$(dirname `readlink -f $0`)"
LD_LIBRARY_PATH="$dir/libs:$LD_LIBRARY_PATH"
QT_QPA_FONTDIR="$dir/fonts"
export LD_LIBRARY_PATH QT_QPA_FONTDIR
exec $dir/bin/myapp "$\@"

Finally make sure you use chrpath to strip RPATH info out of your binaries (apps and libs) as suggested by @kshegunov . If they have hard coded paths as built on your system and those paths do not exist on your target system they will not work. If the path is gone it will use the LD_LIBRARY_PATH.

Make sure you have the libraries you wanted to distribute in libs and all others (i.e. Qt) in LD path areas on your system and you should be good to go.

That was a long answer to saying basically your app can't find the mysql Qt plugin. ;) Hopefully it helps though, I've gone through a lot of headache getting binary apps distributed for Linux in the past.

mbnoimi

@ambershark I did as you advice but I'm still get same errors!

Files tree:

.
├── bin
│   ├── qt.conf
│   └── SyncAccountsManager
├── libs
│   ├── libicudata.so.56 -> libicudata.so.56.1
│   ├── libicudata.so.56.1
│   ├── libicui18n.so.56 -> libicui18n.so.56.1
│   ├── libicui18n.so.56.1
│   ├── libicuuc.so.56 -> libicuuc.so.56.1
│   ├── libicuuc.so.56.1
│   ├── libqgsttools_p.prl
│   ├── libqgsttools_p.so -> libqgsttools_p.so.1.0.0
│   ├── libqgsttools_p.so.1 -> libqgsttools_p.so.1.0.0
│   ├── libqgsttools_p.so.1.0 -> libqgsttools_p.so.1.0.0
│   ├── libqgsttools_p.so.1.0.0
│   ├── libQt5Core.so -> libQt5Core.so.5.7.0
│   ├── libQt5Core.so.5 -> libQt5Core.so.5.7.0
│   ├── libQt5Core.so.5.7 -> libQt5Core.so.5.7.0
│   ├── libQt5Core.so.5.7.0
│   ├── libQt5Gui.la
│   ├── libQt5Gui.prl
│   ├── libQt5Gui.so -> libQt5Gui.so.5.7.0
│   ├── libQt5Gui.so.5 -> libQt5Gui.so.5.7.0
│   ├── libQt5Gui.so.5.7 -> libQt5Gui.so.5.7.0
│   ├── libQt5Gui.so.5.7.0
│   ├── libQt5Sql.la
│   ├── libQt5Sql.prl
│   ├── libQt5Sql.so -> libQt5Sql.so.5.7.0
│   ├── libQt5Sql.so.5 -> libQt5Sql.so.5.7.0
│   ├── libQt5Sql.so.5.7 -> libQt5Sql.so.5.7.0
│   ├── libQt5Sql.so.5.7.0
│   └── plugins
│       ├── platforms
│       │   ├── libqeglfs.so
│       │   ├── libqlinuxfb.so
│       │   ├── libqminimalegl.so
│       │   ├── libqminimal.so
│       │   ├── libqoffscreen.so
│       │   └── libqxcb.so
│       └── sqldrivers
│           ├── libqsqlite.so
│           ├── libqsqlmysql.so
│           └── libqsqlpsql.so
└── SyncAccountsManager.sh

SyncAccountsManager.pro

QT += core sql
QT -= gui

TARGET = SyncAccountsManager

CONFIG += c++11
CONFIG += release

CONFIG += console
CONFIG -= app_bundle

TEMPLATE = app

SOURCES += src/main.cpp \
    src/connectdb.cpp

HEADERS += \
    src/connectdb.h

DESTDIR = bin

win32 {
    MOC_DIR = tmp-win32
    UI_DIR = tmp-win32
    UI_HEADERS_DIR = tmp-win32
    UI_SOURCES_DIR = tmp-win32
    OBJECTS_DIR = tmp-win32
    RCC_DIR = tmp-win32
}

linux {
    MOC_DIR = tmp-lin64
    UI_DIR = tmp-lin64
    UI_HEADERS_DIR = tmp-lin64
    UI_SOURCES_DIR = tmp-lin64
    OBJECTS_DIR = tmp-lin64
    RCC_DIR = tmp-lin64
#    QMAKE_POST_LINK = strip $${PWD}/$${DESTDIR}/$${TARGET}
#    QMAKE_RPATHDIR =
#    QMAKE_RPATHLINKDIR = # Possibly not needed
    QMAKE_POST_LINK = $${PWD}/src/fix_executable.sh $${TARGET} $$(QTDIR) $${PWD}/$${DESTDIR} $${PWD}

}

fix_executable.sh

#!/bin/sh
appname="$1"
qt="$2"
binpath="$3"
project_path="$4"
distro=$project_path/deb/files

#### Clean the app
strip $binpath/$appname
chrpath -d $binpath/$appname

#### Create files tree ####
cd $distro
rm -fr $distro/*
mkdir bin
mkdir -p libs/plugins
cp -fr $binpath $distro
chmod +x  $distro/bin/$appname.sh
mv -f $distro/bin/$appname.sh $distro
cp -fr $qt/lib/* $distro/libs
cp -fr $qt/plugins $distro/libs

ldd result on the deployed machine:

mbnoimivm@ubuntu:~/files$ ./SyncAccountsManager.sh
QSqlDatabase: QMYSQL driver not loaded
QSqlDatabase: available drivers: QSQLITE QMYSQL QMYSQL3 QPSQL QPSQL7
Unable to connect!
^C
mbnoimivm@ubuntu:~/files$ ldd bin/SyncAccountsManager
bin/SyncAccountsManager: /usr/lib/x86_64-linux-gnu/libQt5Core.so.5: no version information available (required by bin/SyncAccountsManager)
bin/SyncAccountsManager: /usr/lib/x86_64-linux-gnu/libQt5Core.so.5: no version information available (required by bin/SyncAccountsManager)
bin/SyncAccountsManager: /usr/lib/x86_64-linux-gnu/libQt5Sql.so.5: no version information available (required by bin/SyncAccountsManager)
        linux-vdso.so.1 =>  (0x00007ffe1044f000)
        libQt5Sql.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Sql.so.5 (0x00007f62ea9c7000)
        libQt5Core.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 (0x00007f62ea321000)
        libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f62ea01c000)
        libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f62e9e06000)
        libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f62e9a41000)
        libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f62e9822000)
        libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f62e9609000)
        libicui18n.so.52 => /usr/lib/x86_64-linux-gnu/libicui18n.so.52 (0x00007f62e9202000)
        libicuuc.so.52 => /usr/lib/x86_64-linux-gnu/libicuuc.so.52 (0x00007f62e8e88000)
        libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f62e8c84000)
        libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007f62e897c000)
        librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f62e8773000)
        libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f62e846d000)
        /lib64/ld-linux-x86-64.so.2 (0x00005653e78dc000)
        libicudata.so.52 => /usr/lib/x86_64-linux-gnu/libicudata.so.52 (0x00007f62e6bff000)
        libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f62e69c1000)
mbnoimivm@ubuntu:~/files$

ambershark

ldd result on the deployed machine:

mbnoimivm@ubuntu:~/files$ ./SyncAccountsManager.sh
QSqlDatabase: QMYSQL driver not loaded
QSqlDatabase: available drivers: QSQLITE QMYSQL QMYSQL3 QPSQL QPSQL7
Unable to connect!
^C
mbnoimivm@ubuntu:~/files$ ldd bin/SyncAccountsManager
bin/SyncAccountsManager: /usr/lib/x86_64-linux-gnu/libQt5Core.so.5: no version information available (required by bin/SyncAccountsManager)
bin/SyncAccountsManager: /usr/lib/x86_64-linux-gnu/libQt5Core.so.5: no version information available (required by bin/SyncAccountsManager)
bin/SyncAccountsManager: /usr/lib/x86_64-linux-gnu/libQt5Sql.so.5: no version information available (required by bin/SyncAccountsManager)
        linux-vdso.so.1 =>  (0x00007ffe1044f000)
        libQt5Sql.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Sql.so.5 (0x00007f62ea9c7000)
        libQt5Core.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 (0x00007f62ea321000)
        libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f62ea01c000)
        libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f62e9e06000)
        libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f62e9a41000)
        libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f62e9822000)
        libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f62e9609000)
        libicui18n.so.52 => /usr/lib/x86_64-linux-gnu/libicui18n.so.52 (0x00007f62e9202000)
        libicuuc.so.52 => /usr/lib/x86_64-linux-gnu/libicuuc.so.52 (0x00007f62e8e88000)
        libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f62e8c84000)
        libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007f62e897c000)
        librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f62e8773000)
        libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f62e846d000)
        /lib64/ld-linux-x86-64.so.2 (0x00005653e78dc000)
        libicudata.so.52 => /usr/lib/x86_64-linux-gnu/libicudata.so.52 (0x00007f62e6bff000)
        libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f62e69c1000)
mbnoimivm@ubuntu:~/files$

Ok so it looks like it is picking up your system Qt and not the one you want it to use. That is controlled with LD_LIBRARY_PATH.. In your synaccountsmanager.sh it may be working but since you used ldd bin/SyncAccountsManager it didn't use the ld library path properly so it could be right but from what I'm looking at it's definitely not.

So run ldd like this:

$ cd yourapp/bin
$ LD_LIBRARY_PATH="../libs" ldd ./SyncAccountsManager

That should give us the output we want. Also make sure your .sh start script sets your LD_LIBRARY_PATH just like that. You could try running it straight on the command line like that and see if it works. If not the ldd output will be useful at least.

One of the things that is most concerning is this line:

bin/SyncAccountsManager: /usr/lib/x86_64-linux-gnu/libQt5Sql.so.5: no version information available (required by bin/SyncAccountsManager)

Also I don't see libQt5Sql.so.5 in your libs directory. I'm sure you need that if you're using SQL. ;)

mbnoimi

@ambershark said in Unable to deploy Qt app under Linux:

Ok so it looks like it is picking up your system Qt and not the one you want it to use. That is controlled with LD_LIBRARY_PATH.. In your synaccountsmanager.sh it may be working but since you used ldd bin/SyncAccountsManager it didn't use the ld library path properly so it could be right but from what I'm looking at it's definitely not.

The content of SyncAccountsManager.sh

#!/bin/sh

dir="$(dirname `readlink -f $0`)"
LD_LIBRARY_PATH="$dir/libs:$LD_LIBRARY_PATH"
QT_QPA_FONTDIR="$dir/fonts"
export LD_LIBRARY_PATH QT_QPA_FONTDIR
exec $dir/bin/SyncAccountsManagermyapp "$\@"

So run ldd like this:
$ cd yourapp/bin
$ LD_LIBRARY_PATH="../libs" ldd ./SyncAccountsManager

That should give us the output we want. Also make sure your .sh start script sets your LD_LIBRARY_PATH just like that. You could try running it straight on the command line like that and see if it works.

The result of ldd:

mbnoimivm@ubuntu:~$ cd files/bin
mbnoimivm@ubuntu:~/files/bin$ LD_LIBRARY_PATH="../libs" ldd ./SyncAccountsManager
        linux-vdso.so.1 =>  (0x00007ffe11f17000)
        libQt5Sql.so.5 => ../libs/libQt5Sql.so.5 (0x00007f73059e7000)
        libQt5Core.so.5 => ../libs/libQt5Core.so.5 (0x00007f73052cc000)
        libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f7304fbf000)
        libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f7304da9000)
        libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f73049e4000)
        libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f73047c5000)
        libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f73044bf000)
        libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f73042a6000)
        libicui18n.so.56 => ../libs/libicui18n.so.56 (0x00007f7303e0b000)
        libicuuc.so.56 => ../libs/libicuuc.so.56 (0x00007f7303a53000)
        libicudata.so.56 => ../libs/libicudata.so.56 (0x00007f7302070000)
        libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f7301e6b000)
        libgthread-2.0.so.0 => /usr/lib/x86_64-linux-gnu/libgthread-2.0.so.0 (0x00007f7301c69000)
        librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f7301a61000)
        libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007f7301758000)
        /lib64/ld-linux-x86-64.so.2 (0x000055c051da4000)
        libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f730151a000)
mbnoimivm@ubuntu:~/files/bin$

Also I don't see libQt5Sql.so.5 in your libs directory. I'm sure you need that if you're using SQL. ;)

No, it's in my files tree see above please.

mbnoimi

I tried the following but I got same result:

mbnoimivm@ubuntu:~/files/bin$ LD_LIBRARY_PATH="../libs" ./SyncAccountsManager
QSqlDatabase: QMYSQL driver not loaded
QSqlDatabase: available drivers: QSQLITE QMYSQL QMYSQL3 QPSQL QPSQL7
Unable to connect!
^C
mbnoimivm@ubuntu:~/files/bin$

ambershark

Sure is in that list, I must have missed it.. Ok so let's try moving those sqldrivers... Sometimes I have issues with where Qt looks for plugins.

Instead of plugins/sqldrivers try making a copy of those libsql.so files in plugins/. Then see if that works. I'll try to think of anything else that might be going on while you try that.

ambershark

Ok then after that lets see if this is a mysql problem and not a Qt one. Run ldd libqsqlmysql.so and post that output. It may be looking for a mysql library that was upgraded and no longer on your system.

Oh and it shouldn't affect the driver only class availability but make sure you have QT += sql in your pro file. Just in case it does affect it... But I doubt it will.

mbnoimi

@ambershark said in Unable to deploy Qt app under Linux:

Instead of plugins/sqldrivers try making a copy of those libsql.so files in plugins/. Then see if that works. I'll try to think of anything else that might be going on while you try that.

Same error :(

mbnoimivm@ubuntu:~$ files/SyncAccountsManager.sh
QSqlDatabase: QMYSQL driver not loaded
QSqlDatabase: available drivers: QSQLITE QMYSQL QMYSQL3 QPSQL QPSQL7
Unable to connect!
^C
mbnoimivm@ubuntu:~$ tree -R files/
files/
├── bin
│   ├── qt.conf
│   └── SyncAccountsManager
├── libs
│   ├── libicudata.so.56
│   ├── libicudata.so.56.1
│   ├── libicui18n.so.56
│   ├── libicui18n.so.56.1
│   ├── libicuuc.so.56
│   ├── libicuuc.so.56.1
│   ├── libqgsttools_p.prl
│   ├── libqgsttools_p.so
│   ├── libqgsttools_p.so.1
│   ├── libqgsttools_p.so.1.0
│   ├── libqgsttools_p.so.1.0.0
│   ├── libQt5Core.so
│   ├── libQt5Core.so.5
│   ├── libQt5Core.so.5.7
│   ├── libQt5Core.so.5.7.0
│   ├── libQt5Sql.la
│   ├── libQt5Sql.prl
│   ├── libQt5Sql.so
│   ├── libQt5Sql.so.5
│   ├── libQt5Sql.so.5.7
│   ├── libQt5Sql.so.5.7.0
│   └── plugins
│       ├── libqsqlite.so
│       ├── libqsqlmysql.so
│       ├── libqsqlpsql.so
│       ├── libQt5Sql.la
│       ├── libQt5Sql.prl
│       ├── libQt5Sql.so
│       ├── libQt5Sql.so.5
│       ├── libQt5Sql.so.5.7
│       ├── libQt5Sql.so.5.7.0
│       ├── platforms
│       │   ├── libqeglfs.so
│       │   ├── libqlinuxfb.so
│       │   ├── libqminimalegl.so
│       │   ├── libqminimal.so
│       │   ├── libqoffscreen.so
│       │   └── libqxcb.so
│       └── sqldrivers
│           ├── libqsqlite.so
│           ├── libqsqlmysql.so
│           └── libqsqlpsql.so
└── SyncAccountsManager.sh
5 directories, 42 files
mbnoimivm@ubuntu:~$

mbnoimi

@ambershark said in Unable to deploy Qt app under Linux:

Ok then after that lets see if this is a mysql problem and not a Qt one. Run ldd libqsqlmysql.so and post that output. It may be looking for a mysql library that was upgraded and no longer on your system.

mbnoimivm@ubuntu:~/files/libs/plugins/sqldrivers$ ldd libqsqlmysql.so
./libqsqlmysql.so: /usr/lib/x86_64-linux-gnu/libQt5Sql.so.5: no version information available (required by ./libqsqlmysql.so)
./libqsqlmysql.so: /usr/lib/x86_64-linux-gnu/libQt5Sql.so.5: no version information available (required by ./libqsqlmysql.so)
./libqsqlmysql.so: /usr/lib/x86_64-linux-gnu/libstdc++.so.6: version `CXXABI_1.3.9' not found (required by ./libqsqlmysql.so)
./libqsqlmysql.so: /usr/lib/x86_64-linux-gnu/libQt5Core.so.5: no version information available (required by ./libqsqlmysql.so)
./libqsqlmysql.so: /usr/lib/x86_64-linux-gnu/libQt5Core.so.5: no version information available (required by ./libqsqlmysql.so)
./libqsqlmysql.so: /usr/lib/x86_64-linux-gnu/libQt5Core.so.5: no version information available (required by ./libqsqlmysql.so)
        linux-vdso.so.1 =>  (0x00007fff87591000)
        libmysqlclient.so.20 => /usr/lib/x86_64-linux-gnu/libmysqlclient.so.20 (0x00007faa39173000)
        libQt5Sql.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Sql.so.5 (0x00007faa38f34000)
        libQt5Core.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 (0x00007faa3888d000)
        libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007faa38589000)
        libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007faa381c4000)
        libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007faa37fbf000)
        libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007faa37da1000)
        libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007faa37a9b000)
        libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007faa37884000)
        libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007faa3766b000)
        libicui18n.so.52 => /usr/lib/x86_64-linux-gnu/libicui18n.so.52 (0x00007faa37264000)
        libicuuc.so.52 => /usr/lib/x86_64-linux-gnu/libicuuc.so.52 (0x00007faa36eea000)
        libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007faa36be2000)
        librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007faa369da000)
        /lib64/ld-linux-x86-64.so.2 (0x000055741e96f000)
        libicudata.so.52 => /usr/lib/x86_64-linux-gnu/libicudata.so.52 (0x00007faa3516c000)
        libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007faa34f2e000)
mbnoimivm@ubuntu:~/files/libs/plugins/sqldrivers$

mbnoimi

I tried to apply strip but unfortunately it didn't fix the problem

mbnoimivm@ubuntu:~/files/libs/plugins/sqldrivers$ strip libqsqlmysql.so
mbnoimivm@ubuntu:~/files/libs/plugins/sqldrivers$ ldd libqsqlmysql.so
./libqsqlmysql.so: /usr/lib/x86_64-linux-gnu/libQt5Sql.so.5: no version information available (required by ./libqsqlmysql.so)
./libqsqlmysql.so: /usr/lib/x86_64-linux-gnu/libQt5Sql.so.5: no version information available (required by ./libqsqlmysql.so)
./libqsqlmysql.so: /usr/lib/x86_64-linux-gnu/libstdc++.so.6: version `CXXABI_1.3.9' not found (required by ./libqsqlmysql.so)
./libqsqlmysql.so: /usr/lib/x86_64-linux-gnu/libQt5Core.so.5: no version information available (required by ./libqsqlmysql.so)
./libqsqlmysql.so: /usr/lib/x86_64-linux-gnu/libQt5Core.so.5: no version information available (required by ./libqsqlmysql.so)
./libqsqlmysql.so: /usr/lib/x86_64-linux-gnu/libQt5Core.so.5: no version information available (required by ./libqsqlmysql.so)
        linux-vdso.so.1 =>  (0x00007ffd21f90000)
        libmysqlclient.so.20 => /usr/lib/x86_64-linux-gnu/libmysqlclient.so.20 (0x00007fa3fe87c000)
        libQt5Sql.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Sql.so.5 (0x00007fa3fe63d000)
        libQt5Core.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 (0x00007fa3fdf96000)
        libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007fa3fdc92000)
        libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007fa3fd8cd000)
        libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007fa3fd6c8000)
        libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007fa3fd4aa000)
        libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007fa3fd1a4000)
        libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007fa3fcf8d000)
        libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007fa3fcd74000)
        libicui18n.so.52 => /usr/lib/x86_64-linux-gnu/libicui18n.so.52 (0x00007fa3fc96d000)
        libicuuc.so.52 => /usr/lib/x86_64-linux-gnu/libicuuc.so.52 (0x00007fa3fc5f3000)
        libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007fa3fc2eb000)
        librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007fa3fc0e3000)
        /lib64/ld-linux-x86-64.so.2 (0x0000562224202000)
        libicudata.so.52 => /usr/lib/x86_64-linux-gnu/libicudata.so.52 (0x00007fa3fa875000)
        libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007fa3fa637000)
mbnoimivm@ubuntu:~/files/libs/plugins/sqldrivers$

mbnoimi

IMPORTANT:
Although this distro works fine on the original PC but I get this error by ldd:

mbnoimi@mbnoimi-laptop ~/HPC/SyncAccountsManager/deb/files/libs/plugins/sqldrivers $ ldd libqsqlmysql.so 
./libqsqlmysql.so: /usr/lib/x86_64-linux-gnu/libQt5Sql.so.5: version `Qt_5_PRIVATE_API' not found (required by ./libqsqlmysql.so)
./libqsqlmysql.so: /usr/lib/x86_64-linux-gnu/libQt5Sql.so.5: version `Qt_5' not found (required by ./libqsqlmysql.so)
./libqsqlmysql.so: /usr/lib/x86_64-linux-gnu/libQt5Core.so.5: version `Qt_5.7' not found (required by ./libqsqlmysql.so)
./libqsqlmysql.so: /usr/lib/x86_64-linux-gnu/libQt5Core.so.5: version `Qt_5_PRIVATE_API' not found (required by ./libqsqlmysql.so)
./libqsqlmysql.so: /usr/lib/x86_64-linux-gnu/libQt5Core.so.5: version `Qt_5' not found (required by ./libqsqlmysql.so)
	linux-vdso.so.1 =>  (0x00007ffe9f9fd000)
	libmysqlclient.so.20 => /usr/lib/x86_64-linux-gnu/libmysqlclient.so.20 (0x00007f8bd5f9b000)
	libQt5Sql.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Sql.so.5 (0x00007f8bd5f59000)
	libQt5Core.so.5 => /usr/lib/x86_64-linux-gnu/libQt5Core.so.5 (0x00007f8bd5a82000)
	libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f8bd5700000)
	libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f8bd5337000)
	libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f8bd511c000)
	libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f8bd4f18000)
	libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f8bd4cfb000)
	libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f8bd49f1000)
	libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f8bd47db000)
	libicui18n.so.55 => /usr/lib/x86_64-linux-gnu/libicui18n.so.55 (0x00007f8bd4379000)
	libicuuc.so.55 => /usr/lib/x86_64-linux-gnu/libicuuc.so.55 (0x00007f8bd3fe4000)
	libpcre16.so.3 => /usr/lib/x86_64-linux-gnu/libpcre16.so.3 (0x00007f8bd3d7e000)
	libglib-2.0.so.0 => /lib/x86_64-linux-gnu/libglib-2.0.so.0 (0x00007f8bd3a6d000)
	librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f8bd3864000)
	/lib64/ld-linux-x86-64.so.2 (0x0000563fd9f32000)
	libicudata.so.55 => /usr/lib/x86_64-linux-gnu/libicudata.so.55 (0x00007f8bd1dad000)
	libpcre.so.3 => /lib/x86_64-linux-gnu/libpcre.so.3 (0x00007f8bd1b3c000)
mbnoimi@mbnoimi-laptop ~/HPC/SyncAccountsManager/deb/files/libs/plugins/sqldrivers $

kshegunov

@mbnoimi
How did any of this have anything to do with strip or .deb packages?

Here: http://doc.qt.io/qt-5/linux-deployment.html#creating-the-application-package
You haven't followed the required directory structure and you're executing the application from a directory different from qt.conf's location.

Warning: On Linux, this function will try to get the path from the /proc file system. If that fails, it assumes that argv[0] contains the absolute file name of the executable. The function also assumes that the current directory has not been changed by the application.

From here. I'd start by fixing up the shell script. You don't escape the file name of the script but instead quote the whole commands, this doesn't make much sense. Try something like this:

#!/bin/sh

# Don't spawn children shells unnecessarily by using `
dir=$(dirname $(readlink -f "$0"))

# The following might happen to be pretty important
cd $dir'/bin'

# Execute from the current shell's context and no need to export if you don't spawn a new shell process
app=$dir'/bin/SyncAccountsManagermyapp' 

LD_LIBRARY_PATH=$dir'/libs:'$LD_LIBRARY_PATH QT_QPA_FONTDIR=$dir'/fonts' $app "$@"

mbnoimi

@kshegunov I did exactly as you suggested although I didn't notice any problem in the old appname.sh file. Any way your suggestion gave me exactly same error!
May you please take a look into https://github.com/mbnoimi/sql-sync-manager/releases/tag/0.12

ambershark

@kshegunov said in Unable to deploy Qt app under Linux:

@mbnoimi
How did any of this have anything to do with strip or .deb packages?

Here: http://doc.qt.io/qt-5/linux-deployment.html#creating-the-application-package
You haven't followed the required directory structure and you're executing the application from a directory different from qt.conf's location.

Warning: On Linux, this function will try to get the path from the /proc file system. If that fails, it assumes that argv[0] contains the absolute file name of the executable. The function also assumes that the current directory has not been changed by the application.

From here. I'd start by fixing up the shell script. You don't escape the file name of the script but instead quote the whole commands, this doesn't make much sense. Try something like this:
#!/bin/sh

# Don't spawn children shells unnecessarily by using `
dir=$(dirname $(readlink -f "$0"))

# The following might happen to be pretty important
cd $dir'/bin'

# Execute from the current shell's context and no need to export if you don't spawn a new shell process
app=$dir'/bin/SyncAccountsManagermyapp' 

LD_LIBRARY_PATH=$dir'/libs:'$LD_LIBRARY_PATH QT_QPA_FONTDIR=$dir'/fonts' $app "$@"

His problem is definitely deeper than the start script. As we've had him do it direct on the command line with the same results.

Some of the other comments on the start script you made I don't understand. For instance the only difference in $() and backtick in a bash script is looks. Under the covers they both do the same thing. I go back and forth on which I use, they act the exact same though and neither starts an extra shell compared to the first. The newer syntax is $() because they look better but backtick was not deprecated or anything.

The other thing is you mention has to do with escaping. If dir = /a path with spaces/mydir then the script would fail. The original script suffers from the same non-escaping though. Just not sure what your comment meant. The "$@" is a bug though, the \ shouldn't be there.

Anyway back on to the problem at hand. I'm betting you might have a bad mysql lib. I would remove Qt from the equation and test a binary linked against mysql directly. See if it works. If it does I may have another idea for you, if not then fix your MySQL and you should be all set. ;)

mbnoimi

@ambershark said in Unable to deploy Qt app under Linux:

Anyway back on to the problem at hand. I'm betting you might have a bad mysql lib. I would remove Qt from the equation and test a binary linked against mysql directly. See if it works. If it does I may have another idea for you, if not then fix your MySQL and you should be all set. ;)

I built recent MySQL library against Qt (from Oracle PPA) for that I made my distro using *.deb becuase it asks the user for the following depends (Debreate project file SyncAccountsManager.dbp)

Depends: libmysqlclient20 (>=5.7.11), libstdc++6 (>=4.8.4), libgcc1 (>=1:3.0), libc6 (>=2.14)

I'm not sure if this affect on the distro. Another thing I'm using recent GCC because I use some code written in recent C++ version:

mbnoimi@mbnoimi-laptop ~ $ gcc --version
gcc (Ubuntu 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

mbnoimi@mbnoimi-laptop ~ $

Using the above gcc I built Qt MySQL Plugin but on my machine everything fine and I'm able to connect to MySQL without any problem.

mbnoimi

Guys, may I ask you for a tiny test:

Could you please build this release then upload the binaries for me?

ambershark

Yea that sounds like your problem then. You used a different mysql and didn't distribute your custom one to the target system. And you should NOT do this as that would violate the license of mysql.

I'm betting Qt is looking for a mysql version that isn't there or isn't working properly. Hence the "no driver" error message.

Welcome to the wonderful world of making linux binaries. It is painful. It takes a lot of time and effort to solve all these problems. It sounds like you should have a good jumping off point to figure out where you went wrong with mysql though.

You can try making sure the mysql stuff on the target machine is the same as on your machine. Use ldd liberally in trying to find what binaries are failing to load. And finally you can try something like strace to see what operations are running when it fails. OH and don't strip your binaries before distribution and try running the application through gdb. The call stack may give you insight as to why the mysql on the target machine is not good enough.

One last idea, make sure you linked against the same bit size as the target machine. I.e. if you linked 64-bit and the target is 32-bit it would not work and have driver issues.

kshegunov

@ambershark said in Unable to deploy Qt app under Linux:

Some of the other comments on the start script you made I don't understand. For instance the only difference in $() and backtick in a bash script is looks. Under the covers they both do the same thing. I go back and forth on which I use, they act the exact same though and neither starts an extra shell compared to the first. The newer syntax is $() because they look better but backtick was not deprecated or anything.

The other thing is you mention has to do with escaping. If dir = /a path with spaces/mydir then the script would fail. The original script suffers from the same non-escaping though. Just not sure what your comment meant. The "$@" is a bug though, the \ shouldn't be there.

You're most certainly correct. One should take my scripting "skills" with a grain of salt. What I still insist on, however, is that the application is executed from a folder that is different from the one that qt.conf resides in. This can (and possibly does) break the way the plugins are resolved (i.e. the .so locations). If you follow the documentation page on deployment you'd see that the example puts everything (app, conf file) in the root folder and the plugin directory is under that too. That's why I also referenced the warning in the docs.