I'm trying to install a program called Polyworld on my computer. I've downloaded and installed the latest version of QT in order to do so as well as gnuplot and gsl. The qmake seems to turn out fine but then when I run the make I get the following.

wells@LightBlue:~/src/polyworld$ make
gcc -c -pipe -Wno-deprecated -g -D_GLIBCXX_DEBUG -D_GLIBCXX_DEBUG_PEDANTIC -Wno-deprecated -Wall -W -D_REENTRANT -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/local/Trolltech/Qt-4.4.0/mkspecs/linux-g++ -I. -I/usr/local/Trolltech/Qt-4.4.0/include/QtCore -I/usr/local/Trolltech/Qt-4.4.0/include/QtCore -I/usr/local/Trolltech/Qt-4.4.0/include/QtGui -I/usr/local/Trolltech/Qt-4.4.0/include/QtGui -I/usr/local/Trolltech/Qt-4.4.0/include -I. -Iapp -Icritter -Ienvironment -Igraphics -Iui -Iutils -I/include -I/include/QtOpenGL -I/include/QtCore -I/include/QtGui -I/usr/include/GL -I. -I. -o debug.o app/debug.cp
In file included from app/debug.cp:9:
app/debug.h:29:8: warning: extra tokens at end of #endif directive
In file included from utils/error.h:11,
from graphics/gobject.h:23,
from graphics/gpolygon.h:8,
from environment/barrier.h:16,
from app/debug.cp:12:
app/debug.h:29:8: warning: extra tokens at end of #endif directive
In file included from critter/critter.h:12,
from app/debug.cp:13:
app/debug.h:29:8: warning: extra tokens at end of #endif directive
environment/barrier.h:59: error: extra qualification ‘barrier::’ on member ‘gXSortedBarriers’
make: *** [debug.o] Error 1
wells@LightBlue:~/src/polyworld$

Is there a package available for your distribution? What distribution are you using?