The following command will extract all the strings and put them into a ts file: lupdate-qt4 frontend.pro -ts strings.ts
Another solution would be to compile the ui file into a cpp file and then extract the strings: uic-qt4 qtfront.ui > ui_qtfront.cpp
the ui_qtfront.cpp is actually auto generated while compiling the qt frontend.
The following command will extract all the strings and put them into a ts file:
lupdate-qt4 frontend.pro -ts strings.ts
Another solution would be to compile the ui file into a cpp file and then extract the strings:
uic-qt4 qtfront.ui > ui_qtfront.cpp
the ui_qtfront.cpp is actually auto generated while compiling the qt frontend.