non-virtual thunk

[contactmayankjain]

Can you explain what a non-virtual thunk is? I have been getting
this error when trying to link libraries that I have built with
optimization. Specifically, when I change -Os to -O3 when building
the libraries.

 

[Neelesh Bodas]

Can you explain what a non-virtual thunk is? I have been getting
this error when trying to link libraries that I have built with
optimization. Specifically, when I change -Os to -O3 when building
the libraries.

I neither believe this is your question nor I believe that this is
your wording. Just have a look at http://lists.apple.com/archives/Unix-porting/2003/Dec/msg00108.html.

If, by a strange coincidence, you really have this question, then
providing a piece of code with the exact error message would be
helpful.


-Neelesh

 

[contactmayankjain]

Can you explain what anon-virtualthunkis? I have been getting
this error when trying to link libraries that I have built with
optimization. Specifically, when I change -Os to -O3 when building
the libraries.

I neither believe this is your question nor I believe that this is
your wording. Just have a look athttp://lists.apple.com/archives/Unix-porting/2003/Dec/msg00108.html.

If, by a strange coincidence, you really have this question, then
providing a piece of code with the exact error message would be
helpful.

-Neelesh

It's an internal implementation detail used for C++ class hierarchies
that involve multiple inheritance. You aren't doing anything wrong;
this is a compiler bug. We know that we need to fix it. In the mean
time, the best workaround we know of is to use the same optimization
level for linking against a library that you used to compile the
library.

(You might also consider not exporting a C++ interface from a library.
We work very hard to make sure that the C and Objective C ABI stays
the same from one compiler release to the next, but we make no such
promise for C++.)


http://lists.apple.com/archives/Unix-porting/2003/Dec/msg00107.html


what is written is this true?

Any idea to resolve this issue.

When I am compiling my code without the -O2 option it got compiled but
it gives me error when I am using this option. I am using the latest
version of the GCC compiler