"Ignoring second definition" warning

[mrstephengross]

I'm using gcc 3.3.1 on an alpha/tru64 (v5) system. When archiving
together two object files that included the same header, I run into the
archiver warning "Ignoring second definition." Consider the following
code:

=======================================
temp.h: inline int foo() { return 0; }
a.cpp: #include "temp.h"
       int a() { return foo(); }
b.cpp: #include "temp.h"
       int b() { return foo(); }
=======================================

I compile each .cpp into a .o :

gcc -c -o a.o a.cpp
gcc -c -o b.o b.cpp

The object files get built fine. Now I want to archive them together
into a single .a :

ar -r temp.a a.o b.o

And I get a warning about how ar is ignoring the second definition of
'foo'. It would appear that the compiler ignored the 'inline' specifier
and preserved 'foo' as a symbol in each object file.

I've tried to force gcc to truly inline the functions by playing around
with gcc's options (such as -finline-size). So far I've been
unsuccessful. Any ideas?

Thanks,
--Steve (mrstephengross@hotmail.com)