Unable to cross-compile gstreamer application

[gurpartap]

Hello,

I am working on IMX8MQEVK board, using Linux BSP L4.14.98_2.0.0. I wanted to cross-compile gstreamer application from linux host system. Since native aarch64-linux-gnu-gcc is unable to find gstreamer-1.0 libraries, I decided build the SDK with required libraries using bitbake fsl-image-validation-imx -c populate_sdk. I added the meta-gstreamer1.0 layer from sumo branch to source and in bblayer.conf file and as instructed in linux users giude, added following code to local.conf:

 IMAGE_INSTALL_append += "gstreamer1.0-rtsp-server gstreamer1.0 gstreamer1.0-plugins-base gstreamer1.0-plugins-good gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly gstreamer1.0-libav"
LICENSE_FLAGS_WHITELIST = "commercial"

The sdk was built succesfully and I installed it to /opt/fsl-image destination but now when I used  aarch64-poky-linux-gcc app.c -o app_arm `pkg-config --cflags --libs gstreamer-1.0`, I get the following error: 

In file included from /opt/fsl-imx-wayland/4.14-sumo/sysroots/x86_64-pokysdk-linux/usr/lib/aarch64-poky-linux/gcc/aarch64-poky-linux/7.3.0/include-fixed/syslimits.h:7:0,
from /opt/fsl-imx-wayland/4.14-sumo/sysroots/x86_64-pokysdk-linux/usr/lib/aarch64-poky-linux/gcc/aarch64-poky-linux/7.3.0/include-fixed/limits.h:34,
from /opt/fsl-imx-wayland/4.14-sumo/sysroots/aarch64-poky-linux/usr/lib/glib-2.0/include/glibconfig.h:11,
from /opt/fsl-imx-wayland/4.14-sumo/sysroots/aarch64-poky-linux/usr/include/glib-2.0/glib/gtypes.h:32,
from /opt/fsl-imx-wayland/4.14-sumo/sysroots/aarch64-poky-linux/usr/include/glib-2.0/glib/galloca.h:32,
from /opt/fsl-imx-wayland/4.14-sumo/sysroots/aarch64-poky-linux/usr/include/glib-2.0/glib.h:30,
from /opt/fsl-imx-wayland/4.14-sumo/sysroots/aarch64-poky-linux/usr/include/gstreamer-1.0/gst/gst.h:27,
from basic_tut1.c:1:
/opt/fsl-imx-wayland/4.14-sumo/sysroots/x86_64-pokysdk-linux/usr/lib/aarch64-poky-linux/gcc/aarch64-poky-linux/7.3.0/include-fixed/limits.h:194:61: error: no include path in which to search for limits.h
#include_next <limits.h> /* recurse down to the real one */
^
In file included from /opt/fsl-imx-wayland/4.14-sumo/sysroots/aarch64-poky-linux/usr/include/glib-2.0/glib/galloca.h:32:0,
from /opt/fsl-imx-wayland/4.14-sumo/sysroots/aarch64-poky-linux/usr/include/glib-2.0/glib.h:30,
from /opt/fsl-imx-wayland/4.14-sumo/sysroots/aarch64-poky-linux/usr/include/gstreamer-1.0/gst/gst.h:27,
from basic_tut1.c:1:
/opt/fsl-imx-wayland/4.14-sumo/sysroots/aarch64-poky-linux/usr/include/glib-2.0/glib/gtypes.h:35:10: fatal error: time.h: No such file or directory
#include <time.h>
^~~~~~~~
compilation terminated.

I tried rebuilding the SDK, the same error repeated. I will also try it with warrior branch since zeus branch gives error with gstreamer. Meanwhile Please help me resolve the issue or provide an alternative to allow cross-compliation of gstreamer applications from x86_64 host to arm64 target imx8mqevk machine. 

Thank you

[gurpartap · Accepted solution]

Hello, 

I ended up solving my problem and it was an issue in the linker file in the built SDK. I used GNU toolchain along with the libraries from sumo build 

aarch64-linux-gnu-gcc --sysroot=/home/gavy0197/imx/toolchain/sysroots/aarch64-poky-linux -L/home/gavy0197/imx/toolchain/sysroots/aarch64-poky-linux/usr/lib/ gtsream_app.c -o gtsream_app_arm `pkg-config --cflags --libs gstreamer-1.0`

I added -L"folder to gstreamer library" and changed the sysroot directory to where the correct linker script and all the required header files were located. I really thought it would be smoother than this but I hope it helps someone who has a similar query.

[joanxie]

4.14.98 includes gstreamer already, after you build the yocto bsp accroding to the yocto user guide, you can get the gstreamer libary already you don't need to cross compile it

[gurpartap]

Hello Joanxie,

I found the gstreamer libraries in the build, but they only allow me to work with gst functions on command-line. I however wanted to build an application that could allow me to switch between two cameras and record and playback video using interactive interface. Hence, I wanted to cross compile the application from linux host machine for imx8m device. Is there a BSP version which is works well for creating SDK for gstreamer as I saw many discussions stating that when building the toolchain or SDK, the library linkers often point to host lib folder, causing issues while cross compiling.