weird ld error adding an extra -l

mcriddy · 06-29-2006, 01:00 AM

Has anyone ever seen this before? When I'm making this project, i get the error "can't find -l-lXext". When i try removing -lXext, just to see what happens, i get the extra -l attached to the next lib. Nowhere in my makefiles is there a lib linked to like "-l-l", plus i'm sure i have all of the libs it wants. Here is the compile command and the error. Any ideas?

Code:

ake[4]: Entering directory `/home/mcrider/vuVolume2/vuQT4Gui/vuParII'
/bin/sh ../../libtool --mode=link g++  -O2 -g    -o vuParII -I/usr/local/Trolltech/Qt-4.1.4/include  -I/usr/X11R6/include -pthread -I/usr/X11R6/include -pthread -pthread  main.o vuParII.o vuParameterSet.o vuQTHapticDevice.o vuParII_moc.o vuQTHapticDevice_moc.o ../../Renderers/libvuRenderers.la ../../PipeTools/libvuPipeTools.la ../../Volume/libvuVolume.la ../../General/libvuGeneral.la ../../vuQT4Gui/vuParallelCoord/libvuParallelCoord.la ../../vuQT4Gui/vuQTRenderWindow/libvuQTRenderWindow.la../../Extern/libvuExtern.la -L/usr/local/Trolltech/Qt-4.1.4/lib -l   -L/usr/X11R6/lib -lX11 -lXext -lXmu -lXt -lXi   -lGLU -lGL -L/usr/X11R6/lib -lX11  -lm -lglut -lGL -L/usr/X11R6/lib -lX11  -lm -lglut    parameter/libvuParII_parameter.la ../editors/libvuQTGui_editors.la ../../Renderers/libvuRenderers.la ../../PipeTools/libvuPipeTools.la ../../Volume/libvuVolume.la ../../General/libvuGeneral.la ../../vuQT4Gui/vuParallelCoord/libvuParallelCoord.la ../../vuQT4Gui/vuQTRenderWindow/libvuQTRenderWindow.la ../../Extern/libvuExtern.la -L/usr/local/Trolltech/Qt-4.1.4/lib -l   -L/usr/X11R6/lib -lX11 -lXext -lXmu -lXt -lXi   -lGLU -lGL -L/usr/X11R6/lib -lX11  -lm -lglut -lGL -L/usr/X11R6/lib -lX11  -lm -lglut
g++ -O2 -g -o .libs/vuParII -I/usr/local/Trolltech/Qt-4.1.4/include -I/usr/X11R6/include -I/usr/X11R6/include main.o vuParII.o vuParameterSet.o vuQTHapticDevice.o vuParII_moc.o vuQTHapticDevice_moc.o  -pthread -L/usr/local/Trolltech/Qt-4.1.4/lib -L/usr/X11R6/lib parameter/.libs/libvuParII_parameter.a /home/mcrider/vuVolume2/Renderers/.libs/libvuRenderers.so /home/mcrider/vuVolume2/PipeTools/.libs/libvuPipeTools.so /home/mcrider/vuVolume2/Volume/.libs/libvuVolume.so /home/mcrider/vuVolume2/General/.libs/libvuGeneral.so /home/mcrider/vuVolume2/Extern/.libs/libvuExtern.so ../editors/.libs/libvuQTGui_editors.a ../../Renderers/.libs/libvuRenderers.so ../../PipeTools/.libs/libvuPipeTools.so ../../Volume/.libs/libvuVolume.so ../../General/.libs/libvuGeneral.so ../../vuQT4Gui/vuParallelCoord/.libs/libvuParallelCoord.a ../../vuQT4Gui/vuQTRenderWindow/.libs/libvuQTRenderWindow.a ../../Extern/.libs/libvuExtern.so -l -lXext -lXmu -lXt -lXi -lGLU -lGL -lX11 -lm -lglut -Wl,--rpath -Wl,/usr/local/lib
/usr/bin/ld: cannot find -l-lXext
collect2: ld returned 1 exit status
make[4]: *** [vuParII] Error 1
make[4]: Leaving directory `/home/mcrider/vuVolume2/vuQT4Gui/vuParII'
make[3]: *** [all-recursive] Error 1
make[3]: Leaving directory `/home/mcrider/vuVolume2/vuQT4Gui/vuParII'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/home/mcrider/vuVolume2/vuQT4Gui'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/home/mcrider/vuVolume2'
make: *** [all] Error 2

Wim Sturkenboom · 06-29-2006, 07:31 AM

Instead of removing '-lXext', I would just remove '-l'. Looks like you have somewhere an empty variable (so added to a '-l' still gives '-l')
If this comes from an IDE, maybe the first line in the list of libraries is empty (or the last one).

mcriddy · 07-02-2006, 06:46 PM

So i went into the Makefile (i know thats not the way to fix the problem, but thought it would just show that it is fixable) of this directory, and tried a) deleting the standalone -l that comes before it, which gives me an error about not finding one of my own libs (which does exist) and b) deleted the -l that is attached to Xext, and get an error that it can't find "Xext". So either i need to find the right file to edit or there is a bug in ld... btw, i've tried this on the mac (i'm porting this qt3 app to qt4 so it will be multiplatform), and get stuck on the same error. That makes it seem like it is a problem w/ my code.

Wim Sturkenboom · 07-02-2006, 10:56 PM

It will not be a problem in the C/C++ code. Can you post the makefile so we can have a look at it. I'm not a make specialist, but someone else might be.

mcriddy · 07-03-2006, 07:02 PM

o we don't have a 50kb forum post, i put the makefile for the root folder
of the project at:
sfu.ca/~mcrider/MakefileRoot.txt
and the makefile for the subdirectory that goes wonkers is:
sfu.ca/~mcrider/MakefileVuParII.txt

I'd appreciate if someone would take a look at it and see if there is any
weirdness.

BTW, i'm using Debian Sarge, with
GNU ld version 2.15
(GNU libtool) 1.5.6
g++ (GCC) 3.3.5

Cheers,
matt

paulsm4 · 07-03-2006, 08:36 PM

"-lXext", as you know, is fine.

"-l" with nothing after it is bad.

You've got a couple of instances of "-l " - in QT_LIBS and LIBS (in MakefileVuParII.txt), and again in QT_LIBS in MakefileRoot.txt.

Delete 'em and see what happens!

'Hope that helps .. PSM

PS:
It looks like something Qt probably auto-generated behind your back. I'm a GTK+ 2 fan, myself ;-)