[solved] Building problems while trying to build Qt 4.7.3 on a machine that has installed Qt 4.4.3

  • Hi there,

    I am trying to build Qt 4.7.3 on a linux machine that comes with a installed Qt 4.4.3.
    In the beginning of t he build process qmake reads all the .pro files in source dir and creates the corresponding Makefiles.
    Each of the created Makefiles has a line like:

    @LIBS = $(SUBLIBS) -L/usr/lib64 -L/home/user/rpmbuild/BUILD/qt-everywhere-opensource-src-4.7.3/lib -lQtCore -L/usr/lib64 -lz -lm -pthread -L/opt/gnome/lib64 -lgthread-2.0 -lglib-2.0 -lrt -ldl -lpthread @

    The problem is the first occurence of "-L/usr/lib64" which has precedence over "-L/home/user/rpmbuild/BUILD/qt-everywhere-opensource-src-4.7.3/lib"
    As a consequence the wrong QtCore is used (the Qt 4.4.3 one out of /usr/lib64), which results in a linker error.

    In my opinion qmake should not put the /usr/lib64 path in front of the other library path.

    Do you have any hints on how to get that right?
    Is this a bug in qmake?


  • This must have been added from somewhere else. I tried a configure run on an older kubuntu box with Qt 4.4.1 libs in /usr/lib64, I do not have that path in the LIBS variable. Maybe it sneaked in by some other dependency which is installed there?

  • Thanks for the hint Volker.
    I had a closer look into the .spec file of the rpm that I am using and behold:
    there is a line passing several extra parameters to the configure call:

    -- ok now the third try to get that following line into the post. It was parsed away by the forum.

    The line contains:
    @define common_options -L%libdir@

    I changed that line to my needs and the issue is solved now.

Log in to reply

Looks like your connection to Qt Forum was lost, please wait while we try to reconnect.