Linking with static libgsl.a

[<banerjee at wernicke dot ccn dot upenn dot edu>]

Folks,

I am writing a vector (as in an element of a vector space, not <vector>)
that basically consists of wrapping methods around existing gsl_vector
functions.
 
I wrote a program, main.cpp, to test out my VB_Vector class. GSL comes
with both static and shared libraries and I am trying to link with the
static library.

Here's the compilation line for vb_vector.o (the object file of my vector 
class):

g++  -DDEBUG -g -c -Wall -O3 ./vb_vector.cpp -I../include
-I/usr/local/include/gsl -I/home/banerjee/tar_code/libvoxbo

Here's the line for compiling main.cpp:

g++ -static  -DDEBUG -g -Wall -O3 -o main main.cpp
-I/usr/local/include/gsl -I./include -I/home/banerjee/tar_code/libvoxbo
-L./ -L ./lib -L/usr/local/lib -lgslcblas -lgsl -lm -lvbutils

(-lvbutils ==> a library I created, which contains vb_vector.o and other
object files).

I get errors of the type:

./lib/libvbutils.a(vb_vector.o): In function
`VB_Vector::VB_Vector(gsl_vector const *)':
/home/banerjee/tar_mat/src/./vb_vector.cpp:99: undefined reference to
`gsl_vector_memcpy'

So libgsl.a is not getting linked. If I have a call to gsl_vector_memcpy()
in main.cpp (and not just in vb_vector.cpp), gsl_vector_memcpy() 
does get linked into the executable. The other way I found to guarantee
that gsl_vector_memcpy gets linked in, is to add "-u gsl_vector_memcpy"
to the compilation line for main.cpp. 

What am I missing? Is this somehow related to name mangling?

Thanks.


K. Banerjee