How to use qmakes packagesExists function

[kDohmen]

Hello,

I need to know how to use qmakes packagesExists function. If I use it like

packagesExists(justDummy) {
    message(hello)
}

it outputs "hello" but I do not have any library names justDummy installed or registered in pkg-config.

So am I do something wrong? How do check if some library is installed properly?

[SGaist]

Hi,

What version of Qt are you using ? On what platform ?

By the way, is it just a typo or are you using packagesExists ? (additional s)