need help on gfortran and C++

[Mojtaba Seifi]

Dear Sir/Madam,

I'm trying to compile a simple fortran code using gfortran and then 
using this library in a C++ code (compiling by g++). The simple codes 
for fortran and C++ are attached. I use the following commands in 
terminal (ubuntu) for this purpose:

gfortran -c FSub.f90
ar -rcs libFsub.a FSub.o
g++ -c main.cpp
g++ -o main.exe main.o -L/`pwd` -lFsub


But I get the following error:
--------------
main.o: In function `main':
main.cpp:(.text+0x41): undefined reference to `MULTAB_'
collect2: ld returned 1 exit status
--------------
I couldn't find any solution on the Internet for this issue.
Would you please help me on this. I'm new in linux and have no idea how 
to fix this.

Thank you.

-- 
Mojtaba

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