[Development] [Android] Use pkg-config to link with external libraries in qmake project

[Denis Shienkov]

I even have tried following from the Windows cmd durectly:

set PATH=c:\pkgconfig\bin;%PATH%
set PKG_CONFIG_LIBDIR=c:/Android/gstreamer/armv7/lib/pkgconfig
set PKG_CONFIG_SYSROOT_DIR=c:/Android/gstreamer/armv7

pkg-config.exe --cflags gstreamer-1.0

Output is:

-pthread 
-Ic:/Android/gstreamer/armv7c:/Android/gstreamer/armv7/include/gstreamer-1.0 
-Ic:/Android/gstreamer/armv7c:/Android/gstreamer/armv7/include/glib-2.0 
-Ic:/Android/gstreamer/armv7c:/Android/gstreamer/armv7/lib/glib-2.0/include

So, all include dirs are found, but the qmake's link_pkgconfig.prf 
skiped this.. :(


20.12.2017 12:35, Denis Shienkov пишет:
>
> Hi Oswald,
>
> Hmm.. many thanks for your hint, I have modified the
> pkg-conf env variables to:
>
> 1. PKG_CONFIG_LIBDIR = c:\Android\gstreamer\armv7\lib\pkgconfig
>  - a path to all *.pc files.
>
> 2. PKG_CONFIG_SYSROOT_DIR = c:\Android\gstreamer\armv7
>  - a path to a 'fake' sysroot, which contains an 'include',
>    'lib', 'etc' and other directories.
>
> Now, the qmake eats it without warnings...
> But, now, it does not detect the gst's include files,
> like:
>
> #include <gst/gst.h>
>
> though they are present in:
>
> c:\Android\gstreamer\armv7\include\gstreamer-1.0\gst\
>
> :(
>
>
> 20.12.2017 12:04, Oswald Buddenhagen пишет:
>> On Wed, Dec 20, 2017 at 11:39:20AM +0300, Denis Shienkov wrote:
>>> This says about the 'sysroot', but, I have no any sysroot for Android kit,
>>>
>> that's just implausible. you must have something that resembles a
>> sysroot, even if it's not declared as such. if you don't find anything
>> else, just use the directory that contains the lib and include
>> directories.
>>
>> the code is in qt_functions.prf:pkgConfigExecutable(). here you see that
>> you will need to set %PKG_CONFIG_LIBDIR% and %PKG_CONFIG_SYSROOT_DIR% if
>> you qt build is not configured for pkg-config use to start with.
>> _______________________________________________
>> Development mailing list
>> Development at qt-project.org
>> http://lists.qt-project.org/mailman/listinfo/development
>

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