.desktop file cannot find qwt library

[d_stranz]

The environments for your desktop, terminal, and Qt Creator are probably different. In your desktop environment, the location of the qwt shared libraries is probably not included on the path that is searched when executables are loaded, while in a terminal or Qt Creator a different path is used which does contain the qwt .so location.

[Mike_Allsworth]

The environments for your desktop, terminal, and Qt Creator are probably different. In your desktop environment, the location of the qwt shared libraries is probably not included on the path that is searched when executables are loaded, while in a terminal or Qt Creator a different path is used which does contain the qwt .so location.

This entry in the .pro file cures the problem : QMAKE_RPATHDIR += /usr/local/qwt-6.2.0/lib/