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[Chris_12345]

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[lfdm]

Hi Chris!

Does this help? http://stackoverflow.com/questions/718447/adding-external-library-into-qt-creator-project

[dbzhang800]

No, "include" used to include other project files ***.pri.

all your need is
@
INCLUDEPATH += where-is-your-library-header
LIBS += full-path-of-your-library
@

---

And Of Course, your can add above two lines to a .pri file, then include that .pri file to your pro file.

Maybe this is useful for you: https://code.google.com/p/qextserialport/wiki/HowToUseLibrary

[Chris_12345]

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[goetz]

#2 and #5 are correct. The amount of blanks between the += and the quotation mark doesn't matter.

Also, please use proper @-tags for code formatting, otherwise the tags will show up as part of your code :-)