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[Ilmar Wilbers <ilmarw@xxxxxxxxx>]

I keep getting these error for both Linux buildbot machines:
c++ -o demo/function/eval/cpp/main.o -c -Wall -pipe -ansi -Werror 
-DDEBUG -g -DNDEBUG -O2 -DPACKAGE_VERSION=\"0.8.0\" -DHAS_CHOLMOD=1 
-fno-strict-aliasing -I. -I. -Idolfin -I/scratch/buildbot/local/include 
-I/usr/include/libxml2 -I/usr/include/suitesparse 
demo/function/eval/cpp/main.cpp
c++ -o demo/fem/assembly/cpp/demo demo/fem/assembly/cpp/main.o -Ldolfin 
-L/usr/lib/atlas -ldolfin -lxml2 -llapack -lblas -lcholmod -lamd -lcolamd
c++ -o demo/fem/simple/cpp/demo demo/fem/simple/cpp/main.o -Ldolfin 
-L/usr/lib/atlas -ldolfin -lxml2 -llapack -lblas -lcholmod -lamd -lcolamd
dolfin/libdolfin.so: undefined reference to 
`dolfin::IntersectionDetector::intersection(dolfin::Mesh&, 
dolfin::Array<unsigned int>&)'
collect2: ld returned 1 exit status
scons: *** [demo/fem/assembly/cpp/demo] Error 1
dolfin/libdolfin.so: undefined reference to 
`dolfin::IntersectionDetector::intersection(dolfin::Mesh&, 
dolfin::Array<unsigned int>&)'
collect2: ld returned 1 exit status
scons: *** [demo/fem/simple/cpp/demo] Error 1
scons: building terminated because of errors.

They use gcc 4.1.2 and 4.1.3. The Mac does not have this problem, and 
runs version 4.2.1. Any clues?

ilmar