What is missing to build the project?

ldconfig -p | grep mysql libmysqlcppconn.so.7 (libc6,x86-64) => /usr/lib/libmysqlcppconn.so.7 libmysqlclient_r.so.16 (libc6) => /usr/lib/libmysqlclient_r.so.16 libmysqlclient.so.20 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libmysqlclient.so.20 libmysqlclient.so.20 (libc6) => /usr/lib/i386-linux-gnu/libmysqlclient.so.20 libmysqlclient.so.18 (libc6,x86-64) => /usr/lib/libmysqlclient.so.18 libmysqlclient.so.16 (libc6) => /usr/lib/libmysqlclient.so.16 libmysqlclient.so (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libmysqlclient.so libmysqlclient.so (libc6,x86-64) => /usr/lib/libmysqlclient.so

Contents of mysql.pro:

 TARGET = qsqlmysql SOURCES = main.cpp OTHER_FILES += mysql.json include(../../../sql/drivers/mysql/qsql_mysql.pri) PLUGIN_CLASS_NAME = QMYSQLDriverPlugin include(../qsqldriverbase.pri) INCLUDEPATH += /usr/local/include LIBS += -L/usr/local/lib -lmysqlclient_r

Next, I collect in x86

 /home/user/Qt86/5.5/gcc/bin/qmake mysql.pro /usr/bin/ld: skipping incompatible /usr/lib/libmysqlclient_r.so when searching for -lmysqlclient_r /usr/bin/ld: skipping incompatible /usr/lib/libmysqlclient_r.a when searching for -lmysqlclient_r /usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/5/../../../libmysqlclient_r.so when searching for -lmysqlclient_r /usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/5/../../../libmysqlclient_r.a when searching for -lmysqlclient_r /usr/bin/ld: skipping incompatible //usr/lib/libmysqlclient_r.so when searching for -lmysqlclient_r /usr/bin/ld: skipping incompatible //usr/lib/libmysqlclient_r.a when searching for -lmysqlclient_r /usr/bin/ld: cannot find -lmysqlclient_r collect2: error: ld returned 1 exit status Makefile:131: recipe for target '../../../../plugins/sqldrivers/libqsqlmysql.so' failed make: *** [../../../../plugins/sqldrivers/libqsqlmysql.so] Error 1

    1 answer 1

    1. cd $QTDIR/5.5/Src/qtbase/src/plugins/sqldrivers/mysql
    2. qmake "INCLUDEPATH+=/usr/include/mysql" "LIBS+=-L/usr/lib/x86_x64-linux-gnu -lmysqlclient" mysql.pro
    3. Remove from Makefile -L/usr/lib64/mysql -lmysqlclient_r
    4. make
    5. make install