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linking problem -- (c++ ABI compatibility issue?)

Hi all. I'm new to Darwin/Jaguar, and I hope this is the right forum for help.

I'm trying to link against libplotter from gnu plotutils. I installed libplotter and libplotter-dev from fink which put the appropriate libraries in /sw/lib and headers in /sw/include.

Now the linker gives an error that it can't find certain symbols which are clearly there when I look at the symbol table. Does anyone have a guess as to what is going on? c++ ABI issues? (presumably fink built libplotter.2.2.1.dylib with the same g++ I'm building *my* code with)

Linker can't find the symbols (for instance Plotter::openpl()):
+++++++++++++++++++++++++++
[maloney5@kimba:~/projects/working/mols/src/test]$ make makeImage
gcc -L/sw/lib -g makeImage.o -lstdc++ -lgslcblas -lgsl -lplotter -o makeImage
ld: Undefined symbols:
....
Plotter::openpl()
...

But it is really there:
++++++++++++++++++++++++++++
[maloney5@kimba:~/]$ nm /sw/lib/libplotter.dylib | c++filt | grep openpl
....
00023044 T Plotter::openpl(void)
....
++++++++++++++++++++++++++++++

If anyone has any clues or pointers to info, I'd appreciate it. There are other symbols which can't be found with less trivial call signatures, but I thought I'd give the most trivial example.

Thanks in advance.

Cheers,
Craig
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