as Qt is just a bunch of C++ classes (and some helpful tools) you write your programs in C++. So compile your libraries or find suitable compiled versions, add those libraries to your project (*.pro):
LIBS += -Lpath/to/library/dir -lnameofthelibrary
LIBS += -Lpath/to/library/dir -lnameofthelibrary
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add paths to headers:
INCLUDEPATH += path/to/headers
INCLUDEPATH += path/to/headers
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and use them in your project.
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