Some header files in third_party dir conflict with other packages, Overwrite or not overwrite?

[yun.liu@xxxxxxxxxxxxxxxxxxxx (Yun Liu)]

hi, guys

I am packaging pjproject on Ubuntun8.04, and found there are some .h 
files in third_party directory that conflict with the same files in 
other packages.

Like:

        pjproject/third_party/srty/crypto/include/err.h                
conflicts with libc6-dev
        pjproject/third_party/speex/include/speex/*.h                  
conflict with libspeex-dev
        pjproject/third_party/portaudio/include/portaudio.h       
conflicts  with portaudio19-dev

And after I check the content of these files, most of them are different.

If I keep the original header files and don't overwrite them with those 
provided by pjproject, can my pjsip-based application run normally?
Or I have to use the above files provided by pjproject?

Hope for your reply. Thanks :)

Yun