GCC cannot find symbols in archive file

[akwatve]

Hi

I am re-posting it here as this seems the right place, Please see http://ubuntuforums.org/showthread.php?p=4335729 for original post.

I am using g++ to compile some cpp files.
When I used


g++ a.o b.o c.o foo.cpp

Everything works fine. code gets compiled.
But If I create an archive file using :


ar -rc common.a a.o b.o c.o

and then use


g++ common.a foo.cpp

g++ throws a linking error which basically says that it was unable to find any libraries...


foo.cpp:(.text+0x47a): undefined reference to `Class::hello()'

Can someone tell me what is going wrong. I also tried creating archive using ark instead of command line but no success. Is there anything else we need to do while building library archive. BTW I did rename archive to libcommon.a and tried -lcommon but that too gives the same problem. Although this is not a show stopper, I am unable to understand why does g++ rejects archive .....

As per lloyd_b's suggestion, I even tried creating indices using
ranlib common.a or by using
ar -rcs but it didn't resolve the issue.

Thanks in advance
__________________

[WW]

Try
g++ foo.cpp common.a
The order of the files matters when linking.

[akwatve]

Thanks a ton WW. That was the problem. I will make sure to use the right order next time.
Thanks again..........