How to use libusb for android at Qt Creatror.

SGaist

You can't always just include the source code of a library in your project. Some of them requires configuration to e.g. enable functionalities based on your system's installed libraries etc.

xmaze

i mean only for android because it's an external device and not my system. i think need to port the source code for Android or not ?

SGaist

That depends on the library and what it does

sxubach

Hello, I was trying to do exactly the same but I am having some problem following this indications. Right now I have

LIBS += -L/home/toad/libusb-1.0.19/android/libs/armeabi-v7a -libusb1.0.so
INCLUDEPATH += /home/toad/libusb-1.0.19/android/libs/armeabi-v7a

and in the .cpp file I want to use the libarry I have

#include <libusb.h>

also tried

#include "/home/esaote/libusb-1.0.19/android/libs/armeabi-v7a/libusb1.0.so"

but it keeps on giving the error: undefined reference to 'libusb_whatever'

What am I doing wrong?

xmaze

LIBS += -L/home/unix/Downloads/libusb-master/android/libs/armeabi-v7a\
-lusb1.0

this working for me , very important this slash,
-L/home/unix/Downloads/libusb-master/android/libs/armeabi-v7a\ <==== ()

sxubach

without any include on the .cpp file?

xmaze

only in .h file #include <libusb.h> and of course your INCLUDEPATH += /home/toad/
but not to lib, you need to point the source files from libusb , like this
INCLUDEPATH += /home/unix/Downloads/libusb-master/libusb

sxubach

Now I am exactly here:

[quote author="xmaze" date="1417649349"]@ LIBS += -L/home/unix/Downloads/libusb-master/android/libs/armeab
-l libusb1.0.so
INCLUDEPATH += /home/unix/Downloads/libusb-master/android/libs/armeabi @

i have made this changes but i have also the following error

@/home/unix/MyCODE/QT_Creator/src/librtlsdr.c:30: error: libusb.h: No such file or directory
#include <libusb.h>@

any ideas ?[/quote]

my libusb.h is in:
/home/toad/libusb-1.0.19/libusb/libusb.h

and in the .pro file I have
INCLUDEPATH += /home/toad/libusb-1.0.19/libusb

and in the .h I've tried both:
#include "/home/esaote/libusb-1.0.19/libusb/libusb.h"
#include <libusb.h>

xmaze

the error has my path, are u sure that you changed ur path?

sxubach

Right now I have in the .pro file:

@
LIBS += -L/home/toad/libusb-1.0.19/android/libs/armeabi-v7a
-lusb1.0

INCLUDEPATH += /home/toad/libusb-1.0.19/android/libs/armeabi-v7a\

INCLUDEPATH += /home/toad/libusb-1.0.19/libusb\

@

If I am not wrong this looks pretty much like your final .pro file but adding the final line, this final line is the one we agreed I should write in order to be able to do in de .h file:

@
#include <libusb.h>
@

And with this (I am pretty much 100% the paths are correct, QT even autocompletes for me the include) it keeps on giving me the error:

libusb.h: No such file or directory

on the other hand I don't understand either why I should include it I already made the ndk-make to build it in the libusb1.0.so that I am including in the .pro file