adding gcc command line options in QT

How can and where should I add gcc command line options in QtCreator?
example:

I want to run a program in QT which otherwise runs like this in terminal:

Code:

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gcc basic-tutorial-1.c -o basic-tutorial-1 `pkg-config --cflags --libs gstreamer-0.10`

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Where should I add the string `pkg-config --cflags --libs gstreamer-0.10` ??

For exmaple In the .pro file, using the system command
http://qt-project.org/doc/qt-4.8/qma...system-command

qmake even supports pkg-config directly: http://qt-project.org/faq/answer/doe...for_pkg-config

Cheers,
_

Thanks for the reply.I am using pkg-config directly and have added these two lines to my .pro file:

Code:

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CONFIG += link_pkgconfig
PKGCONFIG += gstreamer-0.10

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