Which QWt Files/Libraries does the End User need?

[Astronomy]

Hi,
running my QT Program on another machines gives me an error message:

./Program: error while loading shared libraries: libqwt.so.5: cannot open shared object file: No such file or directory

1) I've copied the libqwt.so.5 Libraries from qwt in the path where my Program is, but without success. (I had to put the path of these files in: "LD_LIBRARY_PATH" or "etc/ld.so.conf". of my developing pc, but i cant do this at every target pc?)

2) Or should this library be integrated in the compiled output ./Program?

Anyone who uses/copies Qwt programs on other machines than developing pc's?

Thanx Astronomy
(QT 4.5.3, Qwt 5.2.1)