Enable Gstreamer in Qt5 configuration

MeowMeow · wrote on 7 Aug 2013, 14:26

Dear SGalst,

About Glib, when i run configuration, this information is displayed.
@
Glib auto-detection... ()
...
lib/arm-linux-gnueabi/librt.so.1: could not read symbols: Invalid operation
collect2: ld returned 1 exit status
make: *** [glib] Error 1
Glib disabled.
@

And in configuration table

@
...
Glib support ........... no
GStreamer support ...... no
PulseAudio support ..... no
Large File support ..... yes
GIF support ............ plugin
JPEG support ........... plugin (system)
PNG support ............ yes (qt)
...
@

SGaist · wrote on 7 Aug 2013, 14:34

Are you cross-compiling Qt ?

MeowMeow · wrote on 7 Aug 2013, 17:05

Yes. It's cross-compiling.

MeowMeow · wrote on 7 Aug 2013, 17:08

Yes, it's cross-compiling.

SGaist · wrote on 7 Aug 2013, 19:52

That's the kind of detail you should have mention earlier...

First thing, did you install a cross-compiling environment ? Did you pass the correct parameters to configure to enable cross-compilation ? Did you get the cross-compiled version of the dependencies you need ?

MeowMeow · wrote on 8 Aug 2013, 01:17

Dear SGalt,
Sorry about mention cross-compiling lately.
The cross-compiling is installed in my system, it is linaro-arm-linux-
About parameters to configure, I think Qt can autodetect Gstreamer so I don't pass any option for Gstreamer in command.
When configuration, nomally it will display information why option is disable, which errors occurs... so I can fix errors and option is enable . With Gstreamer, nothing to display, it makes me confusion.
Thank for your support.

MeowMeow · wrote on 8 Aug 2013, 05:23

Are there any ideas?

SGaist · wrote on 8 Aug 2013, 08:28

You're configuration process fails while testing glib, do you have it for ARM ? Also can you post your complete configure command ?

MeowMeow · wrote on 8 Aug 2013, 12:20

Dear SGalt,
I have just installed glib2.0, libglib2.0, libglib2.0-dev, libqtglib2.0 before.
@
../gcc-linaro-arm-linux-gnueabi-2012.03-20120326_linux/bin/arm-linux-gnueabi-g++ --sysroot=[TARGET_ROOTFS] -o glib glib.o -L[TARGET_ROOTFS]/usr/lib -L[TARGET_ROOTFS]/usr/lib/arm-linux-gnueabi -L[TARGET_ROOTFS/lib/arm-linux-gnueabi -lpthread -ldl -lGLESv2 -lEGL -lIMGegl -lsrv_um -lgmodule-2.0 -lgobject-2.0 -lffi -ldbus-1 -lpcre --sysroot=[TARGET_ROOTFS] -pthread -lgthread-2.0 -lrt -lglib-2.0

/arm-linux-gnueabi/bin/ld: note: 'clock_gettime@@GLIBC_2.4' is defined in DSO ../lib/arm-linux-gnueabi/librt.so.1 so try adding it to the linker command line
/lib/arm-linux-gnueabi/librt.so.1: could not read symbols: Invalid operation
collect2: ld returned 1 exit status
make: *** [glib] Error 1
Glib disabled.
@
librt.so.1 exist in /lib/arm-linux-gnueabi
I try to search solution in Google and many answer is add " -lrt" but you can see that it exist in my command.

This is my complete configure command
@
./configure -confirm-license -opensource -v -arch arm -device linux-xxx-g++ -prefix /opt/share/qt5 -device-option CROSS_COMPILE=/home/gcc-linaro-arm-linux-gnueabi-2012.03-20120326_linux/bin/arm-linux-gnueabi- -sysroot /home/rootfs_br -debug -continue -opengl es2 -pkg-config -dbus -icu
@

Note : linux-xxx-g++ exist in qt-everywhere.../qtbase/mkspecs/devices/

SGaist · wrote on 8 Aug 2013, 14:00

Since you are cross-compiling, you also need to either get the ARM version of these libraries or cross-compile them.

MeowMeow · wrote on 8 Aug 2013, 14:11

Yes, i get the libraries - armel version, they are debian file and i install them by command "dpkg".

SGaist · wrote on 8 Aug 2013, 14:31

Where did you install them ?

MeowMeow · wrote on 8 Aug 2013, 15:52

I install them on target rootfs.

SGaist · wrote on 8 Aug 2013, 19:46

Then how can the configure script find the libraries ?

One way to do that is to copy the libraries and headers from your target rootfs in your toolchain directories

_Mark_ · wrote on 6 Oct 2013, 18:29

Hello, I know this thread is quite old but I'm running into the same issues. I mounted the target's rootfs in a local folder and I set the sysroot parameter to that path.

In that folder there is the complete arm filesystem with these packages installed:

@
libgstreamer0.10-dev
libgstreamer-plugins-base0.10-dev
gstreamer-tools
gstreamer0.10-plugins-bad
gstreamer0.10-plugins-good
gstreamer0.10-plugins-ugly
libglib2.0-dev
libglib2.0-0
libqtglib-2.0-0
@

Here the configure command:

@
./configure -opengl es2 -device linux-rasp-pi-g++ -device-option CROSS_COMPILE=~/dev/rpi/gcc-4.7-linaro-rpi-gnueabihf/bin/arm-linux-gnueabihf- -sysroot /mnt/rasp-pi-rootfs -opensource -confirm-license -optimized-qmake -reduce-relocations -reduce-exports -release -developer-build -make libs -prefix /usr/local/qt5pi -no-pch -nomake examples -nomake tests -silent
@

Anyway both GLib and GStreamer supports are disabled. Here the related errors:

@
Glib auto-detection... ()
compiling glib.cpp
glib.cpp: In function ‘int main(int, char**)’:
glib.cpp:48:19: warning: variable ‘context’ set but not used [-Wunused-but-set-variable]
glib.cpp:55:38: warning: ‘pollfd’ is used uninitialized in this function [-Wuninitialized]
linking glib
/home/femtotech/dev/rpi/gcc-4.7-linaro-rpi-gnueabihf/bin/../lib/gcc/arm-linux-gnueabihf/4.7.2/../../../../arm-linux-gnueabihf/bin/ld: /mnt/rasp-pi-rootfs/usr/lib/arm-linux-gnueabihf/libglib-2.0.a(gmain.o): undefined reference to symbol 'clock_gettime@@GLIBC_2.4'
/home/femtotech/dev/rpi/gcc-4.7-linaro-rpi-gnueabihf/bin/../lib/gcc/arm-linux-gnueabihf/4.7.2/../../../../arm-linux-gnueabihf/bin/ld: note: 'clock_gettime@@GLIBC_2.4' is defined in DSO /mnt/rasp-pi-rootfs/lib/arm-linux-gnueabihf/librt.so.1 so try adding it to the linker command line
/mnt/rasp-pi-rootfs/lib/arm-linux-gnueabihf/librt.so.1: could not read symbols: Invalid operation
collect2: error: ld returned 1 exit status
make: *** [glib] Error 1
Glib disabled.
@

But the /mnt/rasp-pi-rootfs/lib/arm-linux-gnueabihf/librt.so.1 is there, actually.

Any ideas?

MeowMeow · wrote on 14 Oct 2013, 06:41

Dear Mark,
Please check the link to librt.so.1
Maybe it's broken

_dmp · wrote on 4 Dec 2013, 07:44

I cross compile Qt 5.2 for imx6 from source and ./configure just dont try find gstreamer from rootfs. I look at ./configure inside and dont find anything about gstreamer. What can I do?

maatong · wrote on 30 Apr 2014, 17:14

[quote author="_dmp" date="1386143087"]I cross compile Qt 5.2 for imx6 from source and ./configure just dont try find gstreamer from rootfs. I look at ./configure inside and dont find anything about gstreamer. What can I do?[/quote]

Have you solved this problem?
I'm working on it too.

andreyc · wrote on 30 Apr 2014, 17:39

I did not try to cross-compile neither Qt nor GStreamer. So this is just my guess.
On Linux Qt configure tries to find gstreamer using pkg-config utility.
pkg-config uses $PKG_CONFIG_PATH to look for all available packages.
The packages are the text files with simple structure and .pc extension.

Try to find gstreamer*.pc files in your cross-compiled gstreamer and if you find the files then append a path to these files to PKG_CONFIG_PATH environment variable and then run configure from Qt.

moritzh · wrote on 15 Sept 2014, 10:51

Is there meanwhile a solution on how to configure Qt5.3 to use gstreamer? I have the same Problem on the Raspberry Pi.

I'm using this tutorial: http://qt-project.org/wiki/Native_Build_of_Qt5_on_a_Raspberry_Pi
I ignored the change of "QT_CFLAGS_GSTREAMER=" in the configure script, because it is not there. Additionally I set the following environment variables before running configure to get "pkg-config ............. yes":
@PKG_CONFIG_LIBDIR="/usr/lib/pkgconfig:/usr/lib/arm-linux-gnueabihf/pkgconfig:/usr/share/pkgconfig"
PKG_CONFIG_SYSROOT_DIR="/."
PKG_CONFIG_PATH="/usr/lib/pkgconfig:/usr/lib/arm-linux-gnueabihf/pkgconfig:/usr/share/pkgconfig"@

I read a little bit in the configure script code and at the part where the "Configure summary" is generated I found nothing where it is possible to add additional Packages (for example found by pkg-config) so is it even possible that the configure script finds gstreamer or is it even searching?