Þann Laugardagur 25. mars 2006 11:47 skrifaði Kurt Roeckx: > On Sat, Mar 25, 2006 at 11:03:47AM +0100, Gudjon I. Gudjonsson wrote: > > Hi > > Has anyone had the following problem when compiling C++ programs: > > "/usr/X11R6/lib/libGL.a: could not read symbols: Bad value" > > I found this on the internet which is the same problem in Ubuntu. > > http://www.cegui.org.uk/mantis/view.php?id=7 > > But my question is the following. Assuming the problem stems from libGL.a > > not having been compiled with the -fPIC option. Can I recompile it safely > > with this option? I downloaded the Debian version of > > xorg-x11-6.9.0.dfsg.1 but decided to ask the list before continuing. > > My guess is that you're trying to link libGL.a which is a > static library, and therefor not build with -fPIC, into a shared > library, which needs to be build with -fPIC. > > Instead of /usr/X11R6/lib/libGL.a, you need to link to > /usr/X11R6/lib/libGL.so. > > Both are be part of xlibmesa-gl-dev. > > I have no idea why you try to link the static version, but you > shouldn't. > > > Kurt Thank you Kurt for your answer. Unfortunately I don't understand how to apply your answer since I am trying to create a shared library. It is the library qwtplot3d. These are the last lines of the compilation messages I get.
test -d lib/ || mkdir -p lib/ rm -f libqwtplot3d.so.0.3.0 libqwtplot3d.so libqwtplot3d.so.0 libqwtplot3d.so.0.3 g++ -shared -Wl,-soname,libqwtplot3d.so.0 -o libqwtplot3d.so.0.3.0 tmp/qwt3d_axis.o tmp/qwt3d_color.o tmp/qwt3d_coordsys.o tmp/qwt3d_data.o tmp/qwt3d_drawable.o tmp/qwt3d_lighting.o tmp/qwt3d_colorlegend.o tmp/qwt3d_extglwidget.o tmp/qwt3d_plot.o tmp/qwt3d_label.o tmp/qwt3d_types.o tmp/qwt3d_enrichment_std.o tmp/qwt3d_autoscaler.o tmp/qwt3d_io_reader.o tmp/qwt3d_io.o tmp/qwt3d_scale.o tmp/qwt3d_gridmapping.o tmp/qwt3d_parametricsurface.o tmp/qwt3d_function.o tmp/qwt3d_surfaceplot.o tmp/qwt3d_gridplot.o tmp/qwt3d_meshplot.o tmp/qwt3d_io_gl2ps.o tmp/gl2ps.o tmp/moc_qwt3d_extglwidget.o tmp/moc_qwt3d_plot.o tmp/moc_qwt3d_surfaceplot.o -L/usr/share/qt3/lib -L/usr/X11R6/lib -lz -lqt-mt -lGLU -lGL -lXmu -lpthread /usr/bin/ld: /usr/X11R6/lib/libGL.a(glapi.o): relocation R_X86_64_32 against `a local symbol' can not be used when making a shared object; recompile with -fPIC /usr/X11R6/lib/libGL.a: could not read symbols: Bad value collect2: ld returned 1 exit status make: *** [lib/libqwtplot3d.so.0.3.0] Error 1 Regards Gudjon
