Trying to get Kivy running on imx8 platform #yocto #linux #imx8

* Trying to get Kivy running on imx8 platform #yocto #linux #imx8
@ 2021-07-16  1:41 whuang8933
  2021-07-16 15:54 ` [yocto] " Randy MacLeod
  0 siblings, 1 reply; 2+ messages in thread
From: whuang8933 @ 2021-07-16  1:41 UTC (permalink / raw)
  To: yocto


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Hi community!
I would like to get Kivy recipe going for this project as I think it would be great to add an extra GUI framework to the project; however, I'm running into an issue that I've been stuck on for a couple days now.
I initially got it running on a rockchip (but it keeps falling back on LLVM pipe for some reason), and would like to do the same on an imx8mp platform. Unfortunately, I get a segmentation fault when getting Kivy to run on the imx8 and I couldn't find any help with Kivy's support group. I was hoping the community can lend me an extra hand/give me an extra set of eyes as I'm currently stumped.

Things I have tried so far:
o.      played around Kivy's USE_X11 & USE_WAYLAND switches
o.      Originally it was using Python 3.8.10. The Kivy I got going on rockchip was on Python 3.8.2, so I downgraded to that version.
o.      Tried using different weston versions (weston_9.0.0.imx and weston_8.0.0.imx)
o.      The stacktrace mentioned missing pthread_mutex_lock file.. thought it was pthreads related so I added glibc and libgcc to the image install
o.      Some googling showed that others use KIVY_GL_BACKEND=gl, but this did not work.

I've attached the recipe I've written up so far and related patch files. (Kivy's current setup.py doesn't seem to look for GLESv2 libraries for non-android/ios/rpi platforms), a recipe that installs Kivy examples, and attached my stacktrace for extra information.

Any help would be very much appreciated!
Thanks,
William Huang

PS: It's my first time posting to a mailing list. Is it proper to send source code as attachments or just copy and paste into message body? Anyways, I've attached the files for now.

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[-- Attachment #2: python3-kivy_2.0.0.bb --]
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# Recipes were "glued" together using information from
# https://www.zilogic.com/porting-kivy-a-multi-touch-ui-framework-to-colibri-t20/
# https://jerome.flesch.info/blog/post/13/Kivy-recipe-for-Yocto
# https://discordapp.com/channels/423249981340778496/490493814281338890/771097327380463616
#   o   a guy named octavio and his team were able to get Kivy running on imx6
# Also, remember to compile SDL2 with gles2 option enabled

SUMMARY = "Recipie to embedded the Python PiP Package Kivy"
HOMEPAGE = "https://kivy.org/"
LICENSE = "MIT"

LIC_FILES_CHKSUM = "file://LICENSE;md5=f0c851d60495c7e27225a819e179208a"

inherit setuptools3

SRC_URI = "\
    git://github.com/kivy/kivy.git;protocol=git;\
    "

# Kivy's setup files only look for GLES libraries for android, iOs, Raspberry Pi, and mali-based OS's
# We need to patch the setup file to tell Kivy setup that our machine has GLES libaries installed as well
SRC_URI += " \
    file://0001-add-support-for-glesv2.patch \
"
SRCREV = "dedcb6bcabe3d8d6758dcee607e8c33b174d782b"

S = "${WORKDIR}/git"


# These are different switches used in Kivy's setup ....
#USE_WAYLAND = "1"
#export USE_WAYLAND

# theoretically we can use X11 switch with Wayland because of weston/xwayland
USE_X11="1"
export USE_X11

# Use OpenGL ES 2.0 library
KIVY_GRAPHICS = "gles"
export KIVY_GRAPHICS

KIVY_CROSS_SYSROOT="${WORKDIR}/recipe-sysroot"
export KIVY_CROSS_SYSROOT

DEPENDS += " \
    mesa \
    gstreamer1.0 \
    gstreamer1.0-python \
    libsdl2 \
    libsdl2-ttf \
    libsdl2-image \
    libsdl2-mixer \
    pango \
    python3 \
    python3-cython-native \
"

RDEPENDS_${PN} = " \
    mesa \
    gstreamer1.0 \
    gstreamer1.0-python \
    libsdl2 \
    libsdl2-ttf \
    libsdl2-image \
    libsdl2-mixer \
    pango \
    python3 \
    python3-docutils \
    python3-fcntl \
    python3-image \
    python3-pillow \
    python3-pygments \
"

# remove kivy-examples
do_install_append() {
    rm -rf ${D}/usr/share
}

[-- Attachment #3: 0001-add-support-for-glesv2.patch --]
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diff --git a/setup.py b/setup.py
index 9a507c6c4..3f5b70866 100644
--- a/setup.py
+++ b/setup.py
@@ -680,7 +680,18 @@ def determine_gl_flags():
         c_options['use_x11'] = True
         c_options['use_egl'] = True
     else:
-        flags['libraries'] = ['GL']
+        if cross_sysroot:
+            flags['include_dirs'] = [cross_sysroot + '/usr/include']
+            flags['library_dirs'] = [cross_sysroot + '/usr/lib']
+
+        if c_options['use_opengl_es2']:
+            print("using GLESv2 libraries")
+            flags['libraries'] = ['GLESv2']
+        else:
+            flags['libraries'] = ['GL']
+
+
+    print("cross_sysroot: " + str(cross_sysroot))
     return flags, base_flags
 
 

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SUMMARY = "Recipie to embedded the Python PiP Package Kivy"
HOMEPAGE = "https://kivy.org/"
LICENSE = "MIT"

LIC_FILES_CHKSUM = "file://LICENSE;md5=f0c851d60495c7e27225a819e179208a"

SRC_URI = "\
    git://github.com/kivy/kivy.git;protocol=git;\
    "
SRCREV = "dedcb6bcabe3d8d6758dcee607e8c33b174d782b"

S = "${WORKDIR}/git"


do_compile() {
}

do_configure() {
}

do_install() {
    install -d ${D}/usr/share/kivy-examples
    cp -r ${S}/examples ${D}/usr/share/kivy-examples
}

FILES_${PN} += "${S}/examples"

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FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"

# Configure SDL2 with opengles libraries
PACKAGECONFIG_GL = "gles2"

[-- Attachment #6: stacktrace --]
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root@verdin-imx8mp:~# gdb --args python3 /usr/share/kivy-examples/examples/3Drendering/main.py
GNU gdb (GDB) 9.1
Copyright (C) 2020 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "aarch64-tdx-linux".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
    <http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from python3...
(No debugging symbols found in python3)
(gdb) run
Starting program: /usr/bin/python3 /usr/share/kivy-examples/examples/3Drendering/main.py
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/libthread_db.so.1".
[INFO   ] [Logger      ] Record log in /home/root/.kivy/logs/kivy_21-07-16_2.txt
[INFO   ] [Kivy        ] v2.0.0
[INFO   ] [Kivy        ] Installed at "/usr/lib/python3.8/site-packages/kivy/__init__.py"
[INFO   ] [Python      ] v3.8.2 (default, Feb 25 2020, 10:39:28)
[GCC 9.3.0]
[INFO   ] [Python      ] Interpreter at "/usr/bin/python3"
[Detaching after fork from child process 1111]
[INFO   ] [Factory     ] 186 symbols loaded
[DEBUG  ] [Cache       ] register <kv.lang> with limit=None, timeout=None
[DEBUG  ] [Cache       ] register <kv.image> with limit=None, timeout=60
[DEBUG  ] [Cache       ] register <kv.atlas> with limit=None, timeout=None
[INFO   ] [Image       ] Providers: img_tex, img_dds, img_sdl2, img_pil (img_ffpyplayer ignored)
[DEBUG  ] [Cache       ] register <kv.texture> with limit=1000, timeout=60
[DEBUG  ] [Cache       ] register <kv.shader> with limit=1000, timeout=3600
[INFO   ] [Window      ] Provider: sdl2
[New Thread 0xffffe43bf1e0 (LWP 1121)]
[New Thread 0xffffe3bbe1e0 (LWP 1122)]

Thread 1 "python3" received signal SIGSEGV, Segmentation fault.
0x0000fffff7afc7fc in __GI___pthread_mutex_lock (mutex=0xf3) at pthread_mutex_lock.c:67
67	pthread_mutex_lock.c: No such file or directory.
(gdb) backtrace
#0  0x0000fffff7afc7fc in __GI___pthread_mutex_lock (mutex=0xf3) at pthread_mutex_lock.c:67
#1  0x0000fffff4413248 in wl_proxy_create_wrapper () from /usr/lib/libwayland-client.so.0
#2  0x0000fffff447a0e0 in ?? () from /usr/lib/libEGL.so.1
#3  0x0000fffff446c7ac in eglInitialize () from /usr/lib/libEGL.so.1
#4  0x0000fffff6441ea8 in ?? () from /usr/lib/libSDL2-2.0.so.0
#5  0x0000fffff644c86c in ?? () from /usr/lib/libSDL2-2.0.so.0
#6  0x0000fffff644e85c in ?? () from /usr/lib/libSDL2-2.0.so.0
#7  0x0000fffff5ce59ac in ?? () from /usr/lib/python3.8/site-packages/kivy/core/window/_window_sdl2.cpython-38-aarch64-linux-gnu.so
#8  0x0000fffff7d23f1c in ?? () from /usr/lib/libpython3.8.so.1.0
#9  0x0000fffff7cf5fc8 in ?? () from /usr/lib/libpython3.8.so.1.0
#10 0x0000fffff7cf7d34 in _PyEval_EvalFrameDefault () from /usr/lib/libpython3.8.so.1.0
#11 0x0000fffff7dd0434 in _PyEval_EvalCodeWithName () from /usr/lib/libpython3.8.so.1.0
#12 0x0000fffff7d19a48 in _PyFunction_Vectorcall () from /usr/lib/libpython3.8.so.1.0
#13 0x0000fffff7cf5fc8 in ?? () from /usr/lib/libpython3.8.so.1.0
#14 0x0000fffff7cf7d34 in _PyEval_EvalFrameDefault () from /usr/lib/libpython3.8.so.1.0
#15 0x0000fffff7dd0434 in _PyEval_EvalCodeWithName () from /usr/lib/libpython3.8.so.1.0
#16 0x0000fffff7d19a48 in _PyFunction_Vectorcall () from /usr/lib/libpython3.8.so.1.0
#17 0x0000fffff7d1d2ec in ?? () from /usr/lib/libpython3.8.so.1.0
#18 0x0000fffff7cf5fc8 in ?? () from /usr/lib/libpython3.8.so.1.0
#19 0x0000fffff7cfacb8 in _PyEval_EvalFrameDefault () from /usr/lib/libpython3.8.so.1.0
#20 0x0000fffff7dd0434 in _PyEval_EvalCodeWithName () from /usr/lib/libpython3.8.so.1.0
#21 0x0000fffff7d19a48 in _PyFunction_Vectorcall () from /usr/lib/libpython3.8.so.1.0
#22 0x0000fffff7d1b48c in _PyObject_FastCallDict () from /usr/lib/libpython3.8.so.1.0
#23 0x0000fffff7d1b5f4 in _PyObject_Call_Prepend () from /usr/lib/libpython3.8.so.1.0
#24 0x0000fffff7d6e174 in ?? () from /usr/lib/libpython3.8.so.1.0
#25 0x0000fffff7d6a64c in ?? () from /usr/lib/libpython3.8.so.1.0
#26 0x0000fffff7d19cc0 in _PyObject_MakeTpCall () from /usr/lib/libpython3.8.so.1.0
#27 0x0000fffff7cf603c in ?? () from /usr/lib/libpython3.8.so.1.0
#28 0x0000fffff7cf968c in _PyEval_EvalFrameDefault () from /usr/lib/libpython3.8.so.1.0
#29 0x0000fffff7dd0434 in _PyEval_EvalCodeWithName () from /usr/lib/libpython3.8.so.1.0
#30 0x0000fffff7d19a48 in _PyFunction_Vectorcall () from /usr/lib/libpython3.8.so.1.0
#31 0x0000fffff7cf5fc8 in ?? () from /usr/lib/libpython3.8.so.1.0
#32 0x0000fffff7cf968c in _PyEval_EvalFrameDefault () from /usr/lib/libpython3.8.so.1.0
#33 0x0000fffff7dd0434 in _PyEval_EvalCodeWithName () from /usr/lib/libpython3.8.so.1.0
#34 0x0000fffff7dd0780 in PyEval_EvalCodeEx () from /usr/lib/libpython3.8.so.1.0
#35 0x0000fffff7dd07bc in PyEval_EvalCode () from /usr/lib/libpython3.8.so.1.0
#36 0x0000fffff7dcce30 in ?? () from /usr/lib/libpython3.8.so.1.0
#37 0x0000fffff7d53694 in ?? () from /usr/lib/libpython3.8.so.1.0
#38 0x0000fffff7d1b680 in PyVectorcall_Call () from /usr/lib/libpython3.8.so.1.0
#39 0x0000fffff7cfb6f4 in _PyEval_EvalFrameDefault () from /usr/lib/libpython3.8.so.1.0
#40 0x0000fffff7dd0434 in _PyEval_EvalCodeWithName () from /usr/lib/libpython3.8.so.1.0
#41 0x0000fffff7d19a48 in _PyFunction_Vectorcall () from /usr/lib/libpython3.8.so.1.0
#42 0x0000fffff7cf5fc8 in ?? () from /usr/lib/libpython3.8.so.1.0
#43 0x0000fffff7cfacb8 in _PyEval_EvalFrameDefault () from /usr/lib/libpython3.8.so.1.0
#44 0x0000fffff7cf4f44 in ?? () from /usr/lib/libpython3.8.so.1.0
#45 0x0000fffff7cf5fc8 in ?? () from /usr/lib/libpython3.8.so.1.0
#46 0x0000fffff7cf7d34 in _PyEval_EvalFrameDefault () from /usr/lib/libpython3.8.so.1.0
#47 0x0000fffff7cf4f44 in ?? () from /usr/lib/libpython3.8.so.1.0
#48 0x0000fffff7cf5fc8 in ?? () from /usr/lib/libpython3.8.so.1.0
#49 0x0000fffff7cf968c in _PyEval_EvalFrameDefault () from /usr/lib/libpython3.8.so.1.0
#50 0x0000fffff7cf4f44 in ?? () from /usr/lib/libpython3.8.so.1.0
#51 0x0000fffff7cf5fc8 in ?? () from /usr/lib/libpython3.8.so.1.0
#52 0x0000fffff7cf968c in _PyEval_EvalFrameDefault () from /usr/lib/libpython3.8.so.1.0
#53 0x0000fffff7cf4f44 in ?? () from /usr/lib/libpython3.8.so.1.0
#54 0x0000fffff7d1a080 in ?? () from /usr/lib/libpython3.8.so.1.0
#55 0x0000fffff7d1a374 in _PyObject_CallMethodIdObjArgs () from /usr/lib/libpython3.8.so.1.0
#56 0x0000fffff7defa18 in PyImport_ImportModuleLevelObject () from /usr/lib/libpython3.8.so.1.0
#57 0x0000fffff7cfb124 in _PyEval_EvalFrameDefault () from /usr/lib/libpython3.8.so.1.0
#58 0x0000fffff7dd0434 in _PyEval_EvalCodeWithName () from /usr/lib/libpython3.8.so.1.0
#59 0x0000fffff7dd0780 in PyEval_EvalCodeEx () from /usr/lib/libpython3.8.so.1.0
#60 0x0000fffff7dd07bc in PyEval_EvalCode () from /usr/lib/libpython3.8.so.1.0
#61 0x0000fffff7e04750 in ?? () from /usr/lib/libpython3.8.so.1.0
#62 0x0000fffff7e04834 in ?? () from /usr/lib/libpython3.8.so.1.0
#63 0x0000fffff7e071d8 in PyRun_FileExFlags () from /usr/lib/libpython3.8.so.1.0
#64 0x0000fffff7e07364 in PyRun_SimpleFileExFlags () from /usr/lib/libpython3.8.so.1.0
#65 0x0000fffff7e2011c in Py_RunMain () from /usr/lib/libpython3.8.so.1.0
#66 0x0000fffff7e205ac in Py_BytesMain () from /usr/lib/libpython3.8.so.1.0
#67 0x0000fffff7b45110 in __libc_start_main (main=0xaaaaaaaaa8e0 <main>, argc=2, argv=0xfffffffffb98, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=<optimized out>) at ../csu/libc-start.c:308
#68 0x0000aaaaaaaaa918 in _start ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)

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