Clarification about linking order

Question

We have Workshop 5.0 compiler on a 2.6
system. We are trying to create an executable linking
a few object files with some static libraries (*.a ) and
a few dynamic libraries(*.so). But, one particular
function definition, say func1 is available in lib1.a and
also in lib2.so. Is it possible to link the objects and
libraries in some particular manner to get the definition
of the function we want always.
What is the linking order if one wants to use
1. func1:lib1.a
2. func1:lib2.so
Will
ld obj.o -l1 -l2 yield the first
and
ld obj.o -l2 -l1 yield the second?

Answer 1

Thanks for the reply.
Yes, that is not our original question. Let me explain sitiation,
For our product we are using oracle 8.0.6.0.0 and xml parser down loaded (free ware provided by oracle, version -
Oracle XML Parser version 9.0.0.0.0A Beta)
We are using libclntsh.so from oracle libraries and libraries libcore9.a libnls9.a libunls9.a libxml9.a from
xml parser. Some of the symbols are common to both xml libraries and oracle library.
For eg., sltstan is defined in libclntsh.so and libcore9.a, and
lxplget is defined in libclntsh.so and libnls9.a
Our linking order to create application is as follows,
-l(our_app_libs) -lclntsh -lxml9 -lclntsh -lnls9 -lcore9 -lclntsh -lnls9 -lclntsh -lcore9 -lclntsh -lnls9 -lclntsh
-lcore9 -lclntsh
This linking order is dumping core in our application. (Due to segmentation fault)
The stack trace shows that, core dump happening in sltstan function.
However order we changed result is the same. So we converted all .a's of xml libs to .so 's . We used the same
linking order, but now application is dumping core due to bus error.
Stack trace shows bus error happening in lxplget function.
After analysing it is found that,
The calls from oracle libraries (which are common to both) is being picked up from xml libraries and calls
from xml libraries(which are common to both) is picking up from oracle library.
Now the question is,
Is there any mechanism to tell the linker to pick up calls (references) from the same library?
As a workaround, we created the symbolic library for xml libraries using option -B symbolic
(while creating symbolic library, since xml libraries calling system calls like socket related call, those symbols
are shown as undefined reference. So we added all system libraries which have been referenced).
This has resolved our problem.
Now my question is,
whether above method is acceptable from support point of view? (from oracle).
Thanks and Regards
lokeshms