How to set sysroot correctly

[Mark81]

I set up a cross-compile environment for Qt5.9. In QtCreator > Options > Build & Run > Kits I selected my sysroot folder, that look like this:

sysroot
    lib
    opt
    usr

Here there are both cross-compiled Qt5 libraries and all other system ones. QtCreator find the Qt5 ones without any problem but can't find (some) others. For example I have the following library:

sysroot/usr/lib/arm-linux-gnueabihf/libtag.so

and in my .pro file:

LIBS += -ltag

but it cannot find it, neither the include file (sysroot/usr/include/libtag/tag.h).
Of course if I explicitly set the -L option to the right path it works, but I really don't want to do this because I will have to do for a lot of others.

As far as I understand it should search into the sysroot path, shouldn't it?

[jsulm]

@Mark81 How do you include the header file?
Did you try to put libtag.so in sysroot/usr/lib ?

[Mark81]

Well, eventually I found there were two sysroot folders, likely due to a typo in the scripts... hence it was searching in the wrong one.