I am trying an example I got from a magazine originally written for Linux
which dynamically loads shared libraries and instantiates C++ classes within
them. Being a recent FreeBSD convert, I intended to run this example on it.
However, I am having a problem. I did read the man page for dlopen(), and
searched the mailing lists for similar problems. Consequently, I learned to use
-Wl,export-dynamic, but still have not seemed to resolve the problem: when the
program calls dlopen to load the library, it returns
./libcircle.so: Undefined symbol "__pure_virtual"
Now if I remove all pure virtual functions, it naturally just leads to some
other symbol not being found, so I assume it's not a C++ related matter. Am I
just not linking correctly? My makefile is as follows:
---------
.cc.o:
g++ -ggdb -c -fpic -fPIC $<
default:
make testdcl
testdcl: testdcl.o
g++ -Wl,-export-dynamic -o testdcl testdcl.o
libcircle.so: circle.o
g++ -shared -Wl,-export-dynamic -o libcircle.so circle.o
libsquare.so: square.o
g++ -shared -Wl,-export-dynamic -o libsquare.so square.o
all: testdcl libcircle.so libsquare.so
clean:
rm -f *.so *.o testdcl
--------
Any help would be greatly appreciated.
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