It seems that the latest Mercurial source does no contain blitz/array-old.h. The example "cfd.cpp" depends on this file, so it doesn't work. In "cfd.cpp", there are also some negative comments, e.g.:
"There are serious bugs, this simulation doesn't work very well."
So perhaps this example should be removed or updated, if array-old.h is not expected to return?
This compilation error also causes the other examples to not be built, since "make" stops the build process at this point.
Due to this, I did the following in order to compile the other examples:
$ for i in *.cpp; do make $(basename $i .cpp); done
and found that the following cpp-files did not compile:
Torquil M. Sørensen