Hi ChrisW67,

Thanks for your support.

The last script works great. I'm using this script for linux-embedded.

At the end I installed libjpeg in /usr directory.
Example:
# ./configure -prefix /home/ivan/WinXP/Ivan_Maldonado/PeekDocuments/VideoProject/Trolltech/Qt-4.7.1-ljpeg -opensource -release -fast -system-libjpeg -ljpeg

Regards and thanks for all