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PostgreSQL and Trying to connect using Qt

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  • A Offline
    A Offline
    aftertaf
    wrote on last edited by
    #16

    currently following this tuto:
    http://qt-project.org/wiki/How-to-build-a-static-Qt-for-Windows-MinGW

    I changed the powershell script to make it use QT 5.2.1, and for it to build some odbc & psql drivers (i think)

    Get the Powershell script from there, read the tuto fully and do what is says, fully.......

    I've changed these lines:
    @78: $QtSrcUrl = "http://download.qt-project.org/official_releases/qt/5.2/5.2.1/single/qt-everywhere-opensource-src-5.2.1.7z",
    169: -make libs -nomake tools -nomake examples -nomake tests -plugin-sql-odbc -plugin-sql-psql"@

    I'll let you know about the outcome.
    Anyone figures out what I'm doing and cares to give a pointer on how to get it working (tm) from my actions so far, or to correct me :), feel free...

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    • A Offline
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      aftertaf
      wrote on last edited by
      #17

      i have :
      c:\Qt with the binary installer version
      c:\Qt\Static with the 'still compiling' static version (with the psql stuff I hope!!)

      c:\PgSQl93_x86 with postgres 32bit & headers, libs, the whole installer package

      Also have postgres 9.1 64bit (used for work).

      Can someone, somewhere, write a step by step tutorial on how do to it, what prerequisites are what, which differences need which slightly different approach.... ?

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      • C Offline
        C Offline
        clochydd
        wrote on last edited by
        #18

        @aftertaf
        Here's a short tutorial for Qt + PSQL:

        1. Install Qt 5.2 32 from binary mingw32 "Qt 5.2.1 for Windows 32-bit (MinGW 4.8, OpenGL, 634 MB)"
        2. Install Qt 5.2 Sorces
        3. Install PostgreSQL 32-bit
        4. Compile the QPSQL plugin

        REM:
        a. Check the PATH (mingw and postgresql\bin and lib)
        b. I could not manage to have both PSQL 32 and 64 working together on one Win7 - only the 32-Bit works and it only worked after completely uninstalling PSQL 64 and build my own Qt-Applications completely new in a clean directory!

        Hope this is useful for you

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        • A Offline
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          aftertaf
          wrote on last edited by
          #19

          grrrrrrrrrrr

          @xcopy /s /q /y /i C:\Qt\Static\src\qt-everywhere-opensource-src-5.2.1\qtbase\mks
          pecs\winphone-arm-msvc2012 C:\Qt\Static\5.2.1\mkspecs\winphone-arm-msvc2012
          2 File(s) copied
          xcopy /s /q /y /i C:\Qt\Static\src\qt-everywhere-opensource-src-5.2.1\qtbase\mks
          pecs\winphone-x86-msvc2012 C:\Qt\Static\5.2.1\mkspecs\winphone-x86-msvc2012
          2 File(s) copied
          xcopy /s /q /y /i C:\Qt\Static\src\qt-everywhere-opensource-src-5.2.1\qtbase\mks
          pecs\winrt-arm-msvc2012 C:\Qt\Static\5.2.1\mkspecs\winrt-arm-msvc2012
          2 File(s) copied
          xcopy /s /q /y /i C:\Qt\Static\src\qt-everywhere-opensource-src-5.2.1\qtbase\mks
          pecs\winrt-x64-msvc2012 C:\Qt\Static\5.2.1\mkspecs\winrt-x64-msvc2012
          2 File(s) copied
          xcopy /s /q /y /i C:\Qt\Static\src\qt-everywhere-opensource-src-5.2.1\qtbase\mks
          pecs\winrt-x86-msvc2012 C:\Qt\Static\5.2.1\mkspecs\winrt-x86-msvc2012
          2 File(s) copied
          xcopy /s /q /y /i C:\Qt\Static\src\qt-everywhere-opensource-src-5.2.1\qtbase\doc
          \global C:\Qt\Static\5.2.1\doc\global
          58 File(s) copied
          mingw32-make[1]: Target 'install' not remade because of errors.
          mingw32-make[1]: Leaving directory 'C:/Qt/Static/src/qt-everywhere-opensource-sr
          c-5.2.1/qtbase'
          makefile:72: recipe for target 'module-qtbase-install_subtargets' failed
          mingw32-make: *** [module-qtbase-install_subtargets] Error 2
          mingw32-make: Target 'install' not remade because of errors.
          Press Enter to continue...:@

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          • A Offline
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            aftertaf
            wrote on last edited by
            #20

            [quote author="clochydd" date="1391800040"]aftertaf
            Here's a short tutorial for Qt + PSQL:

            1. Install Qt 5.2 32 from binary mingw32 "Qt 5.2.1 for Windows 32-bit (MinGW 4.8, OpenGL, 634 MB)"
            2. Install Qt 5.2 Sorces [/quote]
              -> during install of 'binary' in step above?,
              -> as a tarball just uninflated somewhere 'clean'?
              [quote]3. Install PostgreSQL 32-bit [/quote]
              ->ok, i'll switch now and completely purge x64 9.1 +9.3 from this system

            [quote]4. Compile the QPSQL plugin [/quote]
            @
            include <n00b.h>
            #IFNDEF compile, what do i do?
            @
            i.e. us n00bs, even if we've compiled kernels and broken our teeth on linux, we know how to speak PC in a broad sense, but this is a bit like reading 'the matrix' for us, and we ARE trying....

            I've tried like 50 times to follow the QODBC & QPSQL stuff via google and qt project docs, and something (different every time) ain't working, and my n00bness combined with the fact i'm gutting my system of QT binary & source over and over means i dont understand and can't remember the errors i'm having.
            I've been trying for the past 2 weeks in silence and solitude before bleeding out here...

            [quote]REM:
            a. Check the PATH (mingw and postgresql\bin and lib) [/quote]
            ->the SET PATH env variable , to be sure they're both in there for the system and for the cmd prompts i've been launching??
            Yep.

            [quote]b. I could not manage to have both PSQL 32 and 64 working together on one Win7 - only the 32-Bit works and it only worked after completely uninstalling PSQL 64 and build my own Qt-Applications completely new in a clean directory! [/quote]
            OK, cleaning up (again), this time PGx64 too

            [quote]Hope this is useful for you [/quote]
            me too, will let you know :)

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            • C Offline
              C Offline
              clochydd
              wrote on last edited by
              #21

              @aftertaf: I have modified my tutorial so that now you will see all steps from downloading to building the plugins.
              This is what I've done to make Qt 32-bit and PSQL 32-bit work on Win7 64-Bit:

              1. Prepare compiling of the plugin (Lets assume we install Qt + Sources to C:\Qt, PostgresSQL to C:\Programs(86x)):

              2. Download Qt 5.2.1 32-bit: http://download.qt-project.org/official_releases/qt/5.2/5.2.1/qt-opensource-windows-x86-mingw48_opengl-5.2.1.exe

              3. Run the .exe, install to C:\Qt\Qt5.2.1

              4. Download sources: http://download.qt-project.org/official_releases/qt/5.2/5.2.1/single/qt-everywhere-opensource-src-5.2.1.zip

              5. Extract zip to C:\Qt\Qt5.2.1

              6. Download PostGreSQL 32-bit: http://www.enterprisedb.com/postgresql-932-1-installers-win32?ls=Crossover&type=Crossover

              7. Modify PATH:
                set QTSDK_SQLDRIVERS_PATH=C:\Qt\Qt5.2.0\5.2.1\mingw48_32\plugins\sqldrivers
                set QT_SRC_PATH=C:\Qt\Qt5.2.1\5.2.1\Src\qtbase
                set POSTGRES32=C:\Progra~2\PostgreSQL\9.3 (USE Progra~2 FOR Programs(86x)!)

              8. cd %QT_SRC_PATH%\src\plugins\sqldrivers\psql

              9. add permanently to PATH (Control Panel): C:\Qt\Qt5.2.1\Tools\mingw48_32\bin

              10. modify C:\Progra~2\PostgreSQL\9.3\include\pthread.h (multiple definitions of struct timespec):
                replace: #ifndef HAVE_STRUCT_TIMESPEC
                with: #if ((!defined(_TIMESPEC_DEFINED)) && (!defined(HAVE_STRUCT_TIMESPEC)))

              11. start building the plugins:
                C:\Qt\Qt5.2.0\5.2.0\mingw48_32\bin\qmake "INCLUDEPATH+=%POSTGRES32%\include" "LIBS+=%POSTGRES32%\lib\libpq.lib" psql.pro
                mingw32-make debug
                mingw32-make release

              12. copy the newly created plugins to C:\Qt\Qt5.2.0\5.2.1\mingw48_32\plugins\sqldrivers:
                copy release\libqsqlpsql.a %QTSDK_SQLDRIVERS_PATH%
                copy release\qsqlpsql.dll %QTSDK_SQLDRIVERS_PATH%
                copy debug\libqsqlpsqld.a %QTSDK_SQLDRIVERS_PATH%
                copy debug\qsqlpsqld.dll %QTSDK_SQLDRIVERS_PATH%

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              • A Offline
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                aftertaf
                wrote on last edited by
                #22

                1: Thanks for taking time out :)
                2: OK, i've just reviewed and adapted to my environment slightly

                I get this error:
                @g++ -c -pipe -fno-keep-inline-dllexport -g -std=c++0x -fno-exceptions -frtti -Wall -Wextra -DUNICODE -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DQT_NO_EXCEPTIONS -DQT_PLUGIN -DQT_SQL_LIB -DQT_CORE_LIB -I. -I"C:\Qt\5.2.1\mingw48_32\include\QtSql\5.2.1" -I"C:\Qt\5.2.1\mingw48_32\include\QtSql\5.2.1\QtSql" -I"C:\Qt\5.2.1\mingw48_32\include" -I"C:\Qt\5.2.1\mingw48_32\include\QtSql" -I"C:\Qt\5.2.1\mingw48_32\include\QtCore\5.2.1" -I"C:\Qt\5.2.1\mingw48_32\include\QtCore\5.2.1\QtCore" -I"C:\Qt\5.2.1\mingw48_32\include\QtCore" -I".moc\debug" -I"........\mkspecs\win32-g++" -o .obj\debug\qsql_psql.o ......\sql\drivers\psql\qsql_psql.cpp
                ......\sql\drivers\psql\qsql_psql.cpp:59:22: fatal error: libpq-fe.h: No suchfile or directory
                #include <libpq-fe.h>
                ^
                compilation terminated.
                Makefile.Debug:497: recipe for target '.obj/debug/qsql_psql.o' failed
                mingw32-make[1]: *** [.obj/debug/qsql_psql.o] Error 1
                mingw32-make[1]: Leaving directory 'c:/QT/5.2.1/Src/qtbase/src/plugins/sqldrivers/psql'
                makefile:48: recipe for target 'debug' failed
                mingw32-make: *** [debug] Error 2@

                my path & env.vars set in the dos prompt:(which matches, i have triple checked)
                set QTSDK_SQLDRIVERS_PATH=C:\QT\5.2.1\mingw48_32\plugins\sqldrivers
                set QT_SRC_PATH=c:\QT\5.2.1\Src\qtbase
                set POSTGRES32=c:\psql93_x86

                C:\Qt\5.2.1\mingw48_32\bin;C:\Qt\Tools\mingw48_32\bin;C:\Qt\Tools\QtCreator\bin;C:\psql93_x86\bin;C:\psql93_x86\lib;C:\psql93_x86\include;C:\psql93_x86\include\libpq;C:\Perl\site\bin;C:\Perl\bin;C:\Windows;C:\Windows\system32;C:\Windows\System32\WindowsPowerShell\v1.0\C:\Windows\System32\Wbem;C:\trace;C:\trace\dll;c\trace\prod;C:\windev55;c:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn;c:\Program Files (x86)\Microsoft SQL Server\100\DTS\Binn;c:\Program Files (x86)\Microsoft SQL Server\100\Tools\Binn\VSShell\Common7\IDE;C:\Program Files (x86)\Microsoft Application Virtualization Client;C:\Program Files\doxygen\bin

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                • A Offline
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                  aftertaf
                  wrote on last edited by
                  #23

                  Forum post typo:
                  i do have libpq-fe.h in c:\psql93_x86\include\ (not c:\pgsql93_x86\include)
                  20.5k, dated 3rd Dec 2013

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                  • C Offline
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                    clochydd
                    wrote on last edited by
                    #24

                    But c:\pgsql93_86\include\ is not in the maker's includepath
                    See my suggestion item 11.:
                    [11. start building the plugins:
                    C:\Qt\Qt5.2.0\5.2.0\mingw48_32\bin\qmake “INCLUDEPATH+=%POSTGRES32%\include” “LIBS+=%POSTGRES32%\lib\libpq.lib” psql.pro]
                    good luck!

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                    • A Offline
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                      aftertaf
                      wrote on last edited by
                      #25

                      that's what i'm doing, exactly...
                      but still not finding it.

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                      • SGaistS Offline
                        SGaistS Offline
                        SGaist
                        Lifetime Qt Champion
                        wrote on last edited by
                        #26

                        And what if you replace %POSTGRES32% with the actual path BUT using forward slashes

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                        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                          aftertaf
                          wrote on last edited by
                          #27

                          result (again)
                          @C:\QT\5.2.1\Src\qtbase\src\plugins\sqldrivers\psql>C:\Qt\5.2.1\mingw48_32\bin\qmake "INCLUDEPATH+=c:/psql93_x86/include" "LIBS+=c:/psql93_x86/lib/libpq.lib" psql.pro

                          C:\QT\5.2.1\Src\qtbase\src\plugins\sqldrivers\psql>mingw32-make debug
                          mingw32-make -f Makefile.Debug
                          mingw32-make[1]: Entering directory 'C:/QT/5.2.1/Src/qtbase/src/plugins/sqldrivers/psql'
                          g++ -c -pipe -fno-keep-inline-dllexport -g -std=c++0x -fno-exceptions -frtti -Wall -Wextra -DUNICODE -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DQT_NO_EXCEPTIONS -DQT_PLUGIN -DQT_SQL_LIB -DQT_CORE_LIB -I. -I"C:\Qt\5.2.1\mingw48_32\include\QtSql\5.2.1" -I"C:\Qt\5.2.1\mingw48_32\include\QtSql\5.2.1\QtSql" -I"C:\Qt\5.2.1\mingw48_32\include" -I"C:\Qt\5.2.1\mingw48_32\include\QtSql" -I"C:\Qt\5.2.1\mingw48_32\include\QtCore\5.2.1" -I"C:\Qt\5.2.1\mingw48_32\include\QtCore\5.2.1\QtCore" -I"C:\Qt\5.2.1\mingw48_32\include\QtCore" -I".moc\debug" -I"........\mkspecs\win32-g++" -o .obj\debug\qsql_psql.o ......\sql\drivers\psql\qsql_psql.cpp
                          ......\sql\drivers\psql\qsql_psql.cpp:59:22: fatal error: libpq-fe.h: No such file or directory
                          #include <libpq-fe.h>
                          ^
                          compilation terminated.
                          Makefile.Debug:497: recipe for target '.obj/debug/qsql_psql.o' failed
                          mingw32-make[1]: *** [.obj/debug/qsql_psql.o] Error 1
                          mingw32-make[1]: Leaving directory 'C:/QT/5.2.1/Src/qtbase/src/plugins/sqldrivers/psql'
                          makefile:48: recipe for target 'debug' failed
                          mingw32-make: *** [debug] Error 2
                          @

                          Relevant env vars:(edited for readability)
                          Path=
                          C:\Qt\5.2.1\mingw48_32\bin;
                          C:\Qt\Tools\mingw48_32\bin;
                          C:\Qt\Tools\QtCreator\bin;
                          C:\psql93_x86\bin;
                          C:\psql93_x86\lib;
                          C:\psql93_x86\include;
                          C:\psql93_x86\include\libpq;
                          C:\Perl\site\bin;
                          C:\Perl\bin;
                          C:\Windows;
                          C:\Windows\system32;
                          C:\Program Files\doxygen\bin
                          PATHEXT=.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC;.BPL;.lib
                          POSTGRES32=c:\psql93_x86
                          POSTGRES322=c:/psql93_x86
                          QTSDK_DRIVERSPATH=C:\QT\5.2.1\mingw48_32\plugins\sqldrivers
                          QTSDK_DRIVERSPATH2=C:/QT/5.2.1/mingw48_32/plugins/sqldrivers
                          QT_SRC_PATH=C:\Qt\5.2.1\Src\qtbase
                          QT_SRC_PATH2=C:/Qt/5.2.1/Src/qtbase

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                          • A Offline
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                            aftertaf
                            wrote on last edited by
                            #28

                            tried a different approach, still NOK.

                            copied all of the c:\psql93_x86\include folder (+subdirs) into C:\QT\5.2.1\Src\qtbase\src\plugins\sqldrivers\psql (directory the make enters before the fail)

                            it gets further before borking.
                            @C:\Qt\5.2.1\mingw48_32\bin\moc.exe -DUNICODE -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DQT_NO_EXCEPTIONS -DQT_PLUGIN -DQT_SQL_LIB -DQT_CORE_LIB -D__GNUC__-DWIN32 -I. -I"C:\Qt\5.2.1\mingw48_32\include\QtSql\5.2.1" -I"C:\Qt\5.2.1\mingw48_32\include\QtSql\5.2.1\QtSql" -I"C:\Qt\5.2.1\mingw48_32\include" -I"C:\Qt\5.2.1\mingw48_32\include\QtSql" -I"C:\Qt\5.2.1\mingw48_32\include\QtCore\5.2.1" -I"C:\Qt\5.2.1\mingw48_32\include\QtCore\5.2.1\QtCore" -I"C:\Qt\5.2.1\mingw48_32\include\QtCore" -I".moc\debug" -I"........\mkspecs\win32-g++" ......\sql\drivers\psql\qsql_psql_p.h -o .moc\debug\moc_qsql_psql_p.cpp
                            g++ -c -pipe -fno-keep-inline-dllexport -g -std=c++0x -fno-exceptions -frtti -Wall -Wextra -DUNICODE -DQT_NO_CAST_TO_ASCII -DQT_NO_CAST_FROM_ASCII -DQT_NO_EXCEPTIONS -DQT_PLUGIN -DQT_SQL_LIB -DQT_CORE_LIB -I. -I"C:\Qt\5.2.1\mingw48_32\include\QtSql\5.2.1" -I"C:\Qt\5.2.1\mingw48_32\include\QtSql\5.2.1\QtSql" -I"C:\Qt\5.2.1\mingw48_32\include" -I"C:\Qt\5.2.1\mingw48_32\include\QtSql" -I"C:\Qt\5.2.1\mingw48_32\include\QtCore\5.2.1" -I"C:\Qt\5.2.1\mingw48_32\include\QtCore\5.2.1\QtCore" -I"C:\Qt\5.2.1\mingw48_32\include\QtCore" -I".moc\debug" -I"........\mkspecs\win32-g++" -o .obj\debug\moc_qsql_psql_p.o.moc\debug\moc_qsql_psql_p.cpp
                            g++ -shared -Wl,--out-implib,C:\QT\5.2.1\Src\qtbase\plugins\sqldrivers\libqsqlpsqld.a -o ........\plugins\sqldrivers\qsqlpsqld.dll .obj/debug/main.o .obj/debug/qsql_psql.o .obj/debug/moc_qsql_psql_p.o -lpq -LC:\Qt\5.2.1\mingw48_32\lib -lQt5Sqld -lQt5Cored

                            c:/qt/tools/mingw48_32/bin/../lib/gcc/i686-w64-mingw32/4.8.0/../../../../i686-w64-mingw32/bin/ld.exe: cannot find -lpq
                            collect2.exe: error: ld returned 1 exit status
                            Makefile.Debug:80: recipe for target '........\plugins\sqldrivers\qsqlpsqld.dll' failed
                            mingw32-make[1]: *** [........\plugins\sqldrivers\qsqlpsqld.dll] Error 1
                            mingw32-make[1]: Leaving directory 'C:/QT/5.2.1/Src/qtbase/src/plugins/sqldrivers/psql'
                            makefile:48: recipe for target 'debug' failed
                            mingw32-make: *** [debug] Error 2@
                            i'm so close i can smell the SELECT*, but still no cigar

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                            • A Offline
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                              aftertaf
                              wrote on last edited by
                              #29

                              You are using mingw32's gcc to compile qt and trying to use postgreql library compiled with MSVC.

                              MSVC uses .LIB for libraries while Mingw32 (gcc + binutils) uses .a or .so files for libraries.

                              You can try either of the following methods: a. compile Qt using MSVC. b. use mingw32 to compile postgresql and use its libraries.
                              From:
                              http://stackoverflow.com/questions/5487236/building-qt-postgresql-driver

                              anyone have an easy to follow 'how to build postgres from sources with mingw '?
                              or easier still, how to "use" the "QT" ODBC driver instead?

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                              • A Offline
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                                aftertaf
                                wrote on last edited by
                                #30

                                ...
                                just build libpq.a from sources . . . .
                                http://pgolub.wordpress.com/2008/12/15/building-postgresql-client-library-using-mingw-under-winxp-sp3/

                                don't know what to do with it.
                                sorry for by n00bness, people...

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                                • C Offline
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                                  clochydd
                                  wrote on last edited by
                                  #31

                                  It is not necessary to compile postgresql, I used the binaries 32-bit and with installing ./lib and ./include had been provided, too.
                                  Your make does not recognise the psql includes (the stuff, that follows -I) and that's why you still receive the message 'libpq-fe.h not found'.
                                  Do you see the same error if you use backslashed paths with you qmake command? Qt uses forward slashes but I had success with the backslashed command.

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                                  • SGaistS Offline
                                    SGaistS Offline
                                    SGaist
                                    Lifetime Qt Champion
                                    wrote on last edited by
                                    #32

                                    Just to be sure, wouldn't by any chance libpq-fe.h be in include/libpq ? If so it's that last element that was missing.

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                                    Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                                      clochydd
                                      wrote on last edited by
                                      #33

                                      Yes, this has been installed in "C:\Program Files (x86)\PostgreSQL\9.3\include" together with the binaries of PostgeSQL 32-bit:
                                      "03.12.2013 06:13 21.082 libpq-fe.h"
                                      and - the PostgreSQl include has to be added to qmake!

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                                      • SGaistS Offline
                                        SGaistS Offline
                                        SGaist
                                        Lifetime Qt Champion
                                        wrote on last edited by
                                        #34

                                        Indeed, but you need to give the full path to libqp-fe.h not just the path that contains the libpq folder.

                                        Please avoid having spaces in your path when developing, it something that is not working very well on windows

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                                        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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                                          aftertaf
                                          wrote on last edited by
                                          #35

                                          on my system i installed postgreSQL x86 9.3 to c:\psql93_x86\

                                          so... the qmake command where i specify the INCLUDE+=, LIBS+= etc . . .
                                          i need to tell it precisely and exactly where libqp-fe.h is, including full path ?

                                          how do I do that, i.e. what separator do i use to add more than one entry into the "INCLUDE+=" that i've already specified (using clochydd's tuto on page 2. .) ?

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