Graphical applications fail to start on GNU / Linux (ARM)

[sviscapi]

Hi,

I compiled Plan 9 from User Space on the Open Pandora, a gaming handheld running GNU / Linux (ARM).

Release thread: https://pyra-handheld.com/boards/threads/plan-9-from-user-space.65064/#post-1388455

Package: http://repo.openpandora.org/?page=detail&app=plan9port-magicsam

Command line only tools work perfectly, but graphical applications (9term, acme, etc...) fail with the following error message:

usage: devdraw (don't run directly)
acme: can't open display: muxrpc: unexpected eof

I browsed the web yesterday, and found that missing X11 development libraries may cause this issue. I checked, and libX11-devel, libXt-devel and libXext-devel are part of my development environment, so this can't be the root cause.

Could you please have a look at it ?

Cheers, Sam a.k.a Magic Sam from the Open Pandora community

[sviscapi]

Hi,

I tried again with a modified INSTALL script to fit my environment better.

I added the following parts:

if [ uname -n = pandora ]; then
echo "* Running on Pandora, adjusting linker flags"
echo "LDFLAGS='-L/mnt/utmp/codeblocks/usr/lib'" >> $PLAN9/config
fi

and

if [ uname != Darwin ]; then
# Determine whether fontsrv X11 files are available.
rm -f a.out
gcc -o a.out -c -Iinclude -I/usr/include -I/usr/local/include -I/usr/i
nclude/freetype2 -I/usr/local/include/freetype2
-I/usr/X11R6/include -I/usr/X11R6/include/freetype2 -I/mnt/utmp/co
deblocks/usr/include/freetype2 -I/mnt/utmp/codeblocks/usr/include
-I/mnt/utmp/codeblocks/usr/include/libpng16 -I/mnt/utmp/codeblocks
/usr/include/harfbuzz src/cmd/fontsrv/x11.c >/dev/null 2>&1
if [ -f a.out ]; then
echo " fontsrv dependencies found."
echo "FONTSRV=fontsrv" >>$PLAN9/config
else
echo " fontsrv dependencies not found."
echo "FONTSRV=" >>$PLAN9/config
rm -f bin/fontsrv
fi
rm -f a.out
fi

but to no avail: graphical applications are still not working.

What am I doing wrong ?

Cheers, Sam

[sviscapi]

logs.zip

Attaching some relevant files (INSTALL, config, install.log and install.sum) for your convenience.

Cheers, Sam

[aoeu]

Hi,

This is just an educated guess, but try adding -marm to cflags in 9c, and
recompiling with the INSTALL script.

For reference, here's a code review I abandoned that does exactly that:

https://plan9port-review.googlesource.com/#/c/1530/1/bin/9c

That change was necessary to fix similar problems as to what you are
describing when I setup plan9port on an armv7l Chromebook (in a chroot).

Exactly what version of ARM chip your machine is running? uname -m
should reveal that.

Are the GUI programs suggesting when you try to run them?

On Aug 8, 2016 6:37 AM, "sviscapi" notifications@github.com wrote:

logs.zip https://github.com/9fans/plan9port/files/406591/logs.zip

Attaching some relevant files (INSTALL, config, install.log and
install.sum) for your convenience.

Cheers, Sam

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[sviscapi]

Hi @aoeu !

The Pandora is running an armv7l chip.

Do you think the following would work ?

if [ uname -n = pandora ]; then
echo "* Running on Pandora, adjusting linker flags"
echo "LDFLAGS='-L/mnt/utmp/codeblocks/usr/lib'" >> $PLAN9/config
echo "CFLAGS='-marm'" >> $PLAN9/config
fi

Thanks, Sam

[sviscapi]

Hi @aoeu !

I recompiled plan9port with:

echo "CFLAGS='-marm $CFLAGS'" >> $PLAN9/config

pandora:/mnt/utmp/plan9port-magicsam/plan9port-master$ cat config
SYSVERSION=2.6.x
LDFLAGS='-L/mnt/utmp/codeblocks/usr/lib'
CFLAGS='-marm -Ofast -pipe -mcpu=cortex-a8 -mfpu=neon -ftree-vectorize -mfloat-abi=softfp -fsingle-precision-constant -fuse-ld=gold -fuse-linker-plugin -fdiagnostics-color=auto -fsigned-char -mneon-for-64bits -mvectorize-with-neon-double'
FONTSRV=fontsrv

Unfortunately, graphical applications are still failing with the same error message:

usage: devdraw (don't run directly)
acme: can't open display: muxrpc: unexpected eof

Do you understand what I'm doing wrong ?

Thanks, Sam

logs-v2.zip

[sviscapi]

Hi again,

While browsing the logs I noticed that "rio" has not been built (no error message though) and was missing from the "bin" directory...

Could that be the root cause of my graphical applications issues ?

Cheers, Sam

[arturocastro]

Hey @sviscapi,

I was just having this issue on CentOS 6.
I thought I had installed all the dependencies, but I saw that rio was not being built (silent, too).

Installing the libXext-devel and libXt-devel packages and retrying INSTALL worked.

Maybe you're missing some deps too?

[sviscapi]

Hi @arturocastro !

LibXext-devel and libXt-devel are already part of my development environment. I think the root cause is that I'm trying to compile on ARM...

Could someone please have a look at this issue ? Or at least tell me what are ALL the required dependencies for Plan9Port, and where does the INSTALL script expect them to be (as our environment is a bit "exotic", I might have to change some paths here and there...) ?

Finally, an INSTALL script that doesn't fail silently would come in handy too ;)

Cheers, Sam a.k.a "Magic Sam" from the Open Pandora community

[scopych]

I have exactly the same problem with netbsd 7.0.1

[sviscapi]

Hi all,

@rsc : any news regarding this issue ?

Cheers, Sam

[sviscapi]

Hi all,

Graphical applications are now working on the Pandora. Here are the modifications I had to make:

• INSTALL

if [ uname -n = pandora ]; then
echo "* Running on Pandora, adjusting linker flags"
echo "LDFLAGS='-L/mnt/utmp/codeblocks/usr/lib'" >> $PLAN9/config
echo "CFLAGS='-marm -I/mnt/utmp/codeblocks/usr/include
-I/mnt/utmp/codeblocks/usr/include/X11 $CFLAGS'" >> $PLAN9/config
fi

[...]
if [ uname != Darwin ]; then
# Determine whether fontsrv X11 files are available.
rm -f a.out
gcc -o a.out -c -Iinclude -I/usr/include -I/usr/local/include -I/usr/
include/freetype2 -I/usr/local/include/freetype2
-I/usr/X11R6/include -I/usr/X11R6/include/freetype2 -I/mnt/utmp/c
odeblocks/usr/include/freetype2 -I/mnt/utmp/codeblocks/usr/include
-I/mnt/utmp/codeblocks/usr/include/libpng16 -I/mnt/utmp/codeblock
s/usr/include/harfbuzz src/cmd/fontsrv/x11.c >/dev/null 2>&1
if [ -f a.out ]; then
echo " fontsrv dependencies found."
echo "FONTSRV=fontsrv" >>$PLAN9/config
else
echo " fontsrv dependencies not found."
echo "FONTSRV=" >>$PLAN9/config
rm -f bin/fontsrv
fi
rm -f a.out
fi

• src/cmd/devdraw/mkwsysrules.sh

[...]
elif [ -d /mnt/utmp/codeblocks/usr/include/X11 ]; then
X11=/mnt/utmp/codeblocks/usr
else
X11=noX11dir
fi

I hope that helps.

Cheers, Sam